/* assets/css/standalone.css */
:root {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #111827;
  background: #f6f8fb;
  --site-blue: #0d5bd7;
  --site-blue-dark: #0847ad;
  --site-border: #dbe2ec;
  --site-muted: #64748b;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: #f6f8fb; }
button, input, select, textarea { font: inherit; }
button { -webkit-tap-highlight-color: transparent; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  min-height: 72px;
  padding: 0 clamp(18px, 5vw, 76px);
  border-bottom: 1px solid #e3e8ef;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 14px rgba(15,23,42,.04);
}
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #0f172a;
  font-size: 1.25rem;
  font-weight: 800;
  text-decoration: none;
  letter-spacing: -.02em;
}
.site-brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: #eaf2ff;
  color: var(--site-blue);
  font-family: "Segoe UI Symbol", "DejaVu Sans", sans-serif;
  font-size: 23px;
}
.site-nav { display: flex; align-self: stretch; margin-left: clamp(28px, 5vw, 78px); }
.site-nav button {
  position: relative;
  min-width: 110px;
  padding: 0 24px;
  border: 0;
  background: transparent;
  color: #334155;
  cursor: pointer;
  font-weight: 650;
}
.site-nav button:hover { color: var(--site-blue); }
.site-nav button.is-active { color: var(--site-blue); }
.site-nav button.is-active::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 0;
  height: 3px;
  border-radius: 3px 3px 0 0;
  background: var(--site-blue);
}
.site-actions { display: flex; align-items: center; gap: 20px; color: #334155; font-size: 1.5rem; }
.site-avatar { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 50%; background: #102a56; color: #fff; font-size: 1rem; font-weight: 800; }

.standalone-view { display: none; }
.standalone-view.is-active { display: block; }

.course-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(320px, .9fr);
  min-height: 345px;
  overflow: hidden;
  border-bottom: 1px solid #dfe6ef;
  background: linear-gradient(115deg, #fff 0%, #fff 52%, #eef5ff 100%);
}
.course-hero-copy { align-self: center; padding: 58px clamp(24px, 6vw, 96px); }
.eyebrow { color: var(--site-blue); font-size: .76rem; font-weight: 800; letter-spacing: .12em; }
.course-hero h1 { max-width: 720px; margin: 10px 0 12px; font-size: clamp(2.2rem, 5vw, 4rem); line-height: 1.04; letter-spacing: -.045em; }
.course-hero p { max-width: 650px; margin: 0; color: #53627a; font-size: clamp(1.02rem, 1.6vw, 1.28rem); line-height: 1.55; }
.hero-stats { display: flex; gap: 46px; margin-top: 30px; }
.hero-stats div { display: grid; grid-template-columns: auto auto; gap: 4px 10px; align-items: center; }
.hero-stats strong { grid-row: 1 / 3; display: grid; place-items: center; min-width: 54px; height: 54px; border-radius: 14px; background: #edf4ff; color: var(--site-blue); font-size: 1.12rem; }
.hero-stats span { color: #64748b; }
.course-hero-art { position: relative; min-height: 310px; background: radial-gradient(circle at 52% 48%, rgba(255,255,255,.95), rgba(219,232,250,.5) 45%, transparent 72%); }
.course-hero-art::after { content:""; position:absolute; left:8%; right:8%; bottom:42px; height:64px; border-radius:50%; background:rgba(39,78,132,.14); filter:blur(16px); transform:perspective(300px) rotateX(62deg); }
.hero-piece { position: absolute; bottom: 42px; z-index: 2; font-family: "Segoe UI Symbol", "Noto Sans Symbols 2", "DejaVu Sans", sans-serif; line-height: 1; filter: drop-shadow(0 18px 16px rgba(31,54,88,.22)); }
.hero-piece-main { left: 43%; color: #f9fbff; font-size: clamp(150px, 18vw, 260px); -webkit-text-stroke: 1px #cbd7e7; }
.hero-piece-back { left: 16%; bottom: 58px; color: #243249; font-size: clamp(90px, 11vw, 150px); opacity: .75; }
.hero-piece-side { right: 8%; bottom: 54px; color: #fff; font-size: clamp(105px, 12vw, 170px); -webkit-text-stroke: 1px #cdd7e6; }

.courses-section { width: min(1500px, 100%); margin: 0 auto; padding: 34px clamp(18px, 5vw, 74px) 26px; }
.section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 20px; }
.section-heading h2, .workspace-topbar h1 { margin: 5px 0 0; font-size: clamp(1.65rem, 3vw, 2.35rem); letter-spacing: -.03em; }
.text-button { border: 0; background: transparent; color: var(--site-blue); cursor: pointer; font-weight: 700; }

.standalone-course-library { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.standalone-course-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  border: 1px solid var(--site-border);
  border-radius: 14px;
  background: #fff;
  box-shadow: 0 7px 22px rgba(15,23,42,.055);
  transition: transform .18s ease, box-shadow .18s ease;
}
.standalone-course-card:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(15,23,42,.1); }
.standalone-course-cover { position: relative; display: grid; place-items: center; height: 155px; overflow: hidden; color: #fff; }
.standalone-course-cover::before { content:""; position:absolute; inset:0; background:linear-gradient(135deg, rgba(255,255,255,.18), transparent 45%), repeating-linear-gradient(45deg, rgba(255,255,255,.05) 0 18px, transparent 18px 36px); }
.standalone-course-cover span { position: relative; font-family: "Segoe UI Symbol", "Noto Sans Symbols 2", "DejaVu Sans", sans-serif; font-size: 100px; filter: drop-shadow(0 12px 8px rgba(0,0,0,.25)); }
.cover-0 { background: linear-gradient(135deg, #1d4ed8, #0f2c67); }
.cover-1 { background: linear-gradient(135deg, #6d28d9, #2e1065); }
.cover-2 { background: linear-gradient(135deg, #047857, #064e3b); }
.cover-3 { background: linear-gradient(135deg, #b45309, #78350f); }
.standalone-course-card-main { flex: 1; padding: 18px 18px 14px; }
.course-card-kicker { color: var(--site-blue); font-size: .69rem; font-weight: 800; letter-spacing: .1em; }
.standalone-course-card h2 { margin: 7px 0 7px; font-size: 1.08rem; line-height: 1.3; }
.standalone-course-card p { min-height: 44px; margin: 0 0 15px; color: #64748b; font-size: .9rem; line-height: 1.45; }
.course-card-progress { display: grid; grid-template-columns: 1fr auto; gap: 10px; align-items: center; }
.course-card-progress > div { height: 7px; overflow: hidden; border-radius: 999px; background: #e8edf4; }
.course-card-progress i { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #10b981, #22c55e); }
.course-card-progress span { color: #10a25f; font-size: .82rem; font-weight: 700; }
.standalone-course-card small { display: block; margin-top: 8px; color: #8793a5; }
.standalone-course-card-actions { display: flex; gap: 8px; padding: 0 18px 18px; }
.standalone-course-card-actions .button { flex: 1; }
.button-quiet { flex: 0 0 auto !important; min-width: 58px; }

.feature-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; width: min(1370px, calc(100% - 36px)); margin: 0 auto 50px; overflow: hidden; border: 1px solid #dce7f4; border-radius: 12px; background: #dce7f4; }
.feature-strip div { display: grid; gap: 4px; padding: 20px 24px; background: #f2f7ff; }
.feature-strip strong { color: #174ea6; }
.feature-strip span { color: #65758b; font-size: .86rem; }

.workspace-topbar { display: flex; justify-content: space-between; align-items: end; gap: 24px; width: min(1540px, 100%); margin: 0 auto; padding: 28px clamp(16px, 4vw, 52px) 18px; }
.workspace-tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.workspace-tabs button, .button {
  min-height: 40px;
  padding: 8px 14px;
  border: 1px solid #c8d1dd;
  border-radius: 7px;
  background: #fff;
  color: #273449;
  cursor: pointer;
  text-decoration: none;
}
.workspace-tabs button:hover, .button:hover { background: #f7f9fc; }
.workspace-tabs button.is-active, .button-primary { border-color: var(--site-blue); background: var(--site-blue); color: #fff; }
.workspace-tabs button.is-active:hover, .button-primary:hover { background: var(--site-blue-dark); }
.workspace-panel { display: none; width: min(1540px, 100%); margin: 0 auto; padding: 0 clamp(14px, 4vw, 52px) 60px; }
.workspace-panel.is-active { display: block; }
.standalone-card { border: 1px solid var(--site-border); border-radius: 12px; background: #fff; box-shadow: 0 4px 16px rgba(15,23,42,.045); }
.standalone-course-info { display: grid; grid-template-columns: minmax(240px, 1fr) minmax(300px, 2fr) minmax(150px, .55fr); gap: 18px; padding: 18px; margin-bottom: 15px; align-items: start; }
.standalone-course-info label { display: grid; gap: 7px; font-weight: 650; }
.standalone-course-info input, .standalone-course-info textarea, .standalone-course-info select { width: 100%; padding: 10px 12px; border: 1px solid #bdc7d4; border-radius: 7px; background: #fff; color: #273449; font-weight: 400; }
.standalone-toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; margin: 0 0 15px; }
.button-link, .button-link-delete { border: 0; background: transparent; cursor: pointer; }
.button-link-delete { color: #b42318; }
.button-small { min-height: 31px; padding: 4px 9px; }
.standalone-save-status { color: #087a39; font-weight: 650; }
.standalone-save-status.is-error { color: #b42318; }
#icc-admin-builder { padding: 18px; }
.standalone-preview-host { min-height: 360px; }
.standalone-empty { padding: 30px; text-align: center; color: #64748b; }
.tools-placeholder { display: grid; place-items: center; align-content: center; min-height: calc(100vh - 72px); padding: 40px; text-align: center; }
.tools-placeholder h1 { margin: 10px 0 0; font-size: 2.4rem; }
.tools-placeholder p { color: #64748b; }
.tools-icon { display: grid; place-items: center; width: 90px; height: 90px; border-radius: 24px; background: #eaf2ff; color: var(--site-blue); font-family: "Segoe UI Symbol", sans-serif; font-size: 54px; }

@media (max-width: 1180px) {
  .standalone-course-library { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .course-hero { grid-template-columns: 1fr .7fr; }
}
@media (max-width: 900px) {
  .site-header { grid-template-columns: 1fr auto; }
  .site-nav { grid-column: 1 / -1; order: 3; margin: 0; overflow-x: auto; }
  .site-nav button { min-width: 105px; height: 50px; }
  .site-actions { display: none; }
  .course-hero { grid-template-columns: 1fr; }
  .course-hero-art { display: none; }
  .standalone-course-library { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .feature-strip { grid-template-columns: repeat(2, 1fr); }
  .workspace-topbar { align-items: flex-start; flex-direction: column; }
  .standalone-course-info { grid-template-columns: 1fr; }
}
@media (max-width: 620px) {
  .site-header { padding: 0 14px; }
  .site-brand { min-height: 60px; }
  .course-hero-copy { padding: 38px 20px; }
  .hero-stats { gap: 18px; }
  .standalone-course-library { grid-template-columns: 1fr; }
  .feature-strip { grid-template-columns: 1fr; }
  .section-heading { align-items: flex-start; flex-direction: column; }
  .standalone-course-card-actions { flex-wrap: wrap; }
}


/* Version 8: focused, larger course-study workspace. */
body.is-training-preview .workspace-topbar {
  align-items: center;
  width: 100%;
  padding: 9px clamp(14px, 2vw, 28px) 7px;
}
body.is-training-preview .workspace-topbar > div {
  display: none;
}
body.is-training-preview .workspace-tabs {
  width: 100%;
  justify-content: flex-end;
}
body.is-training-preview .workspace-tabs button {
  min-height: 34px;
  padding: 6px 12px;
}
body.is-training-preview .workspace-panel[data-workspace-panel="preview"] {
  width: 100%;
  max-width: none;
  padding: 0 clamp(8px, 1.2vw, 20px) 18px;
}
body.is-training-preview .workspace-panel[data-workspace-panel="preview"] > .standalone-toolbar {
  justify-content: flex-end;
  margin: 0 0 7px;
}
body.is-training-preview .workspace-panel[data-workspace-panel="preview"] > .standalone-toolbar .button {
  min-height: 34px;
  padding: 6px 11px;
  font-size: .9rem;
}
body.is-training-preview .standalone-preview-host {
  min-height: 0;
}
@media (max-width: 900px) {
  body.is-training-preview .workspace-topbar { align-items: stretch; }
  body.is-training-preview .workspace-tabs { justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; }
}

/* Version 9: compact command bar, course search, and visual position builder. */
.site-actions { position: relative; }
.site-icon-button {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: #17233c;
  font: inherit;
  font-size: 1.55rem;
  cursor: pointer;
}
.site-icon-button:hover, .site-icon-button[aria-expanded="true"] { background: #edf3ff; color: var(--site-blue); }
.site-icon-muted { font-size: 1.32rem; }
.course-search { position: relative; }
.course-search-popover {
  position: absolute;
  z-index: 2000;
  top: calc(100% + 12px);
  right: -54px;
  width: min(390px, calc(100vw - 24px));
  padding: 14px;
  border: 1px solid #cfd8e6;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 22px 60px rgba(15,23,42,.2);
}
.course-search-popover[hidden] { display: none; }
.course-search-popover label { display: block; margin: 0 0 7px; font-size: .8rem; font-weight: 800; color: #334155; }
.course-search-popover input { width: 100%; padding: 11px 12px; border: 1px solid #aebbd0; border-radius: 8px; font-size: 1rem; outline: none; }
.course-search-popover input:focus { border-color: var(--site-blue); box-shadow: 0 0 0 3px rgba(64,67,224,.14); }
.course-search-results { display: grid; gap: 6px; max-height: 390px; margin-top: 10px; overflow: auto; }
.course-search-result { display: flex; justify-content: space-between; align-items: center; gap: 14px; width: 100%; padding: 11px 12px; border: 1px solid transparent; border-radius: 8px; background: #f7f9fc; color: #172033; text-align: left; cursor: pointer; }
.course-search-result:hover, .course-search-result.is-best { border-color: #c8d7ff; background: #edf3ff; }
.course-search-result span { display: grid; gap: 3px; }
.course-search-result small { color: #69778b; }
.course-search-result b { white-space: nowrap; color: var(--site-blue); font-size: .82rem; }
.course-search-empty { margin: 12px 2px 4px; color: #64748b; }

.workspace-topbar {
  align-items: center;
  padding-top: 12px;
  padding-bottom: 10px;
}
.workspace-heading { flex: 0 0 auto; }
.workspace-commandbar {
  display: flex;
  flex: 1 1 auto;
  align-items: center;
  justify-content: space-between;
  gap: clamp(20px, 4vw, 62px);
  min-width: 0;
}
.workspace-command-group { display: flex; align-items: center; gap: 8px; flex-wrap: nowrap; }
.workspace-commandbar button {
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid #c8d1dd;
  border-radius: 7px;
  background: #fff;
  color: #273449;
  white-space: nowrap;
  cursor: pointer;
}
.workspace-commandbar button:hover { background: #f7f9fc; }
.workspace-commandbar button.is-active,
.workspace-commandbar button.button-primary { border-color: var(--site-blue); background: var(--site-blue); color: #fff; }
.workspace-command-training { margin-left: auto; }
body.is-training-preview .workspace-topbar { padding-top: 7px; padding-bottom: 7px; }
body.is-training-preview .workspace-topbar > .workspace-heading { display: none; }
body.is-training-preview .workspace-commandbar { width: 100%; }
body.is-training-preview .workspace-command-primary { justify-content: flex-start; }
body.is-training-preview .workspace-command-training { justify-content: flex-end; }
body.is-training-preview .workspace-panel[data-workspace-panel="preview"] { padding-top: 0; }

.tools-workspace { width: min(1500px, 100%); margin: 0 auto; padding: 28px clamp(16px, 4vw, 52px) 60px; }
.tools-heading { display: flex; justify-content: space-between; align-items: end; gap: 30px; margin-bottom: 18px; }
.tools-heading h1 { margin: 4px 0 0; font-size: clamp(1.8rem, 3vw, 2.7rem); }
.tools-heading p { max-width: 650px; margin: 0; color: #64748b; line-height: 1.55; }
.position-builder { border: 1px solid #d6dee9; border-radius: 14px; background: #fff; box-shadow: 0 8px 26px rgba(15,23,42,.07); overflow: hidden; }
.position-builder-grid { display: grid; grid-template-columns: minmax(430px, 720px) minmax(330px, 1fr); gap: 24px; padding: 22px; }
.position-board-column { width: min(100%, 720px); margin: 0 auto; }
.position-board {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  width: 100%;
  aspect-ratio: 1;
  overflow: hidden;
  border: 2px solid #263246;
  border-radius: 5px;
  touch-action: none;
  user-select: none;
}
.position-square { position: relative; display: grid; place-items: center; min-width: 0; min-height: 0; }
.position-square.is-light { background: #eeeecf; }
.position-square.is-dark { background: #789b59; }
.position-square.is-drop-target { box-shadow: inset 0 0 0 5px #f3c61e; }
.position-piece, .position-drag-ghost {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-family: "Segoe UI Symbol", "DejaVu Sans", sans-serif;
  font-size: clamp(32px, 10cqw, 74px);
  line-height: 1;
  cursor: grab;
  filter: drop-shadow(0 1px 0 rgba(255,255,255,.45));
}
.position-piece.is-hidden { visibility: hidden; }
.position-drag-ghost { position: fixed; z-index: 5000; top: 0; left: 0; pointer-events: none; }
.position-coordinate { position: absolute; z-index: 2; font-size: clamp(8px, 1.35cqw, 12px); font-weight: 800; color: rgba(24,50,24,.7); }
.position-file { right: 4px; bottom: 2px; }
.position-rank { top: 2px; left: 4px; }
.position-palette { display: grid; grid-template-columns: repeat(8, 1fr); gap: 4px; padding: 5px; background: #e9edf3; }
.position-palette-black { border-radius: 9px 9px 0 0; }
.position-palette-white { border-radius: 0 0 9px 9px; }
.position-palette-button { display: grid; place-items: center; min-width: 0; aspect-ratio: 1.1; padding: 0; border: 1px solid transparent; border-radius: 7px; background: transparent; color: #0b1424; font-family: "Segoe UI Symbol", "DejaVu Sans", sans-serif; font-size: clamp(25px, 4vw, 48px); cursor: pointer; }
.position-palette-button:hover { background: #fff; }
.position-palette-button.is-selected { border-color: #53a43f; background: #79b657; color: #07120b; }
.position-controls { display: grid; align-content: start; gap: 14px; }
.position-control-card { padding: 18px; border: 1px solid #d5dde8; border-radius: 11px; background: #fbfcfe; }
.position-control-card h2 { margin: 0 0 14px; font-size: 1.13rem; }
.position-control-card label { display: grid; gap: 6px; margin: 0 0 13px; font-weight: 700; }
.position-control-card select, .position-control-card input { width: 100%; min-height: 40px; padding: 8px 10px; border: 1px solid #acb8c8; border-radius: 7px; background: #fff; font: inherit; font-weight: 400; }
.position-control-card fieldset { margin: 0 0 14px; padding: 12px; border: 1px solid #d4dce6; border-radius: 8px; }
.position-control-card legend { padding: 0 5px; font-weight: 800; }
.castling-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 14px; }
.castling-grid label { display: flex; align-items: center; gap: 7px; margin: 0; font-weight: 500; }
.castling-grid input { width: 16px; min-height: 16px; }
.position-action-list { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.position-action { display: flex; align-items: center; gap: 10px; min-height: 43px; padding: 8px 10px; border: 1px solid #d3dbe6; border-radius: 8px; background: #fff; color: #263349; font-size: 1rem; text-align: left; cursor: pointer; }
.position-action:hover { border-color: #a8bbe0; background: #f2f6ff; }
.position-fen-label { margin-top: 14px !important; }
.position-fen-row { display: grid; grid-template-columns: 1fr auto; gap: 7px; }
.position-status { min-height: 22px; margin: 8px 0 0; color: #087a39; font-weight: 700; }
.position-status.is-error { color: #bd1e1e; }
.position-use-current { width: 100%; margin-bottom: 13px; }
.position-add-course { display: grid; grid-template-columns: 1fr 1fr; gap: 0 12px; }
.position-add-course > label:nth-of-type(3) { grid-column: 1 / -1; }
.position-add-buttons { display: flex; flex-wrap: wrap; gap: 8px; grid-column: 1 / -1; }

@media (max-width: 1220px) {
  .workspace-topbar { align-items: flex-start; flex-direction: column; gap: 10px; }
  .workspace-commandbar { width: 100%; }
  .position-builder-grid { grid-template-columns: minmax(400px, 620px) minmax(310px, 1fr); }
}
@media (max-width: 930px) {
  .workspace-commandbar { overflow-x: auto; padding-bottom: 3px; }
  .workspace-command-training { margin-left: 18px; }
  .position-builder-grid { grid-template-columns: 1fr; }
  .position-board-column { max-width: 680px; }
  .tools-heading { align-items: flex-start; flex-direction: column; }
}
@media (max-width: 620px) {
  .course-search-popover { position: fixed; top: 64px; right: 12px; left: 12px; width: auto; }
  .position-builder-grid { padding: 10px; }
  .position-action-list, .castling-grid, .position-add-course { grid-template-columns: 1fr; }
  .position-add-course > label:nth-of-type(3), .position-add-buttons { grid-column: auto; }
  .position-palette-button { font-size: 28px; }
}

@media (max-width: 900px) {
  .site-actions { display: flex; }
}

/* Version 12.2: promotion chooser, robust puzzle dragging, database fallback and reliable full Stockfish builds. */
.tools-heading-with-tabs { align-items: center; margin-bottom: 10px; }
.tools-tabs { display: flex; gap: 8px; }
.tools-tabs button {
  min-height: 38px; padding: 8px 14px; border: 1px solid #c8d1dd; border-radius: 8px;
  background: #fff; color: #273449; font: inherit; font-weight: 700; cursor: pointer;
}
.tools-tabs button.is-active { border-color: var(--site-blue); background: var(--site-blue); color: #fff; }
.tool-panel { display: none; }
.tool-panel.is-active { display: block; }
.tool-description { margin: 0 0 10px; color: #64748b; }

.position-builder-grid { grid-template-columns: minmax(390px, 570px) minmax(330px, 1fr); gap: 16px; padding: 14px; }
.position-board-column { width: min(100%, 570px); }
.position-board { grid-template-rows: repeat(8, minmax(0, 1fr)); container-type: inline-size; }
.position-square { aspect-ratio: 1 / 1; overflow: hidden; }
.position-piece, .position-drag-ghost { font-size: clamp(32px, 10cqw, 74px); }
.position-palette { gap: 2px; padding: 3px; }
.position-palette-button { aspect-ratio: 1 / 0.82; font-size: clamp(23px, 4.3vw, 39px); touch-action: none; }
.position-controls { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; }
.position-control-card { padding: 12px; }
.position-control-card:first-child { grid-column: 1; }
.position-control-card:nth-child(2) { grid-column: 2; }
.position-control-card.position-use-card { grid-column: 1 / -1; }
.position-control-card h2 { margin-bottom: 9px; font-size: 1rem; }
.position-control-card label { gap: 4px; margin-bottom: 8px; font-size: .88rem; }
.position-control-card select, .position-control-card input { min-height: 34px; padding: 6px 8px; }
.position-control-card fieldset { margin-bottom: 8px; padding: 8px; }
.position-action { min-height: 36px; padding: 6px 8px; font-size: .9rem; }
.position-action-list { gap: 6px; }
.position-add-course { grid-template-columns: repeat(4, 1fr); gap: 0 8px; }
.position-add-course > label:nth-of-type(3) { grid-column: auto; }
.position-add-buttons { grid-column: 1 / -1; }

.analysis-board-app { border: 1px solid #d6dee9; border-radius: 14px; background: #fff; box-shadow: 0 8px 26px rgba(15,23,42,.07); overflow: hidden; }
.analysis-layout {
  display: grid; grid-template-columns: minmax(480px, 690px) minmax(390px, 1fr); gap: 16px;
  min-height: calc(100vh - 175px); padding: 14px;
}
.analysis-board-column { min-width: 0; }
.analysis-board-wrap { display: grid; grid-template-columns: 24px minmax(0, 1fr); gap: 5px; width: min(100%, 690px); margin: 0 auto; }
.analysis-board-stage { position:relative; min-width:0; aspect-ratio:1; }
.analysis-chessboard {
  display: grid; grid-template-columns: repeat(8, minmax(0, 1fr)); grid-template-rows: repeat(8, minmax(0, 1fr));
  width: 100%; min-width: 430px; height:100%; aspect-ratio: 1; overflow: hidden;
  border: 2px solid #263246; border-radius: 5px; container-type: inline-size; touch-action: none; user-select: none;
}
.analysis-square { position: relative; display: grid; place-items: center; min-width: 0; min-height: 0; aspect-ratio: 1; overflow: hidden; }
.analysis-square.is-light { background: #eeeecf; }
.analysis-square.is-dark { background: #789b59; }
.analysis-square.is-legal-target { box-shadow: inset 0 0 0 5px #f3c61e; }
.analysis-piece, .analysis-drag-ghost {
  display: grid; place-items: center; width: 100%; height: 100%; font-family: "Segoe UI Symbol", "DejaVu Sans", sans-serif;
  font-size: clamp(32px, 10cqw, 74px); line-height: 1; cursor: grab; filter: drop-shadow(0 1px 0 rgba(255,255,255,.45));
}
.analysis-piece.is-hidden { visibility: hidden; }
.analysis-drag-ghost { position: fixed; z-index: 5000; top: 0; left: 0; pointer-events: none; }
.analysis-annotations { position:absolute; inset:0; z-index:6; width:100%; height:100%; pointer-events:none; }
.analysis-coordinate { position: absolute; z-index: 2; font-size: clamp(8px, 1.4cqw, 12px); font-weight: 800; color: rgba(24,50,24,.72); }
.analysis-file { right: 4px; bottom: 2px; }
.analysis-rank { top: 2px; left: 4px; }
.analysis-eval-bar { position: relative; align-self: stretch; overflow: hidden; border-radius: 4px; background: #1f2937; color: #fff; }
.analysis-eval-bar > div { position: absolute; right: 0; bottom: 0; left: 0; height: 50%; background: #f5f5f5; transition: height .25s ease; }
.analysis-eval-bar span { position: absolute; z-index: 2; top: 5px; left: 50%; writing-mode: vertical-rl; transform: translateX(-50%); font-size: .72rem; font-weight: 800; mix-blend-mode: difference; }
.analysis-board-controls { display: grid; grid-template-columns: repeat(5, 1fr); gap: 5px; width: min(100%, 690px); margin: 7px auto 0; padding-left: 29px; }
.analysis-board-controls button, .analysis-fen-row button, .analysis-engine-settings button {
  min-height: 37px; border: 1px solid #c8d1dd; border-radius: 7px; background: #fff; color: #273449; font: inherit; cursor: pointer;
}
.analysis-board-controls button:hover, .analysis-fen-row button:hover, .analysis-engine-settings button:hover { background: #f2f6ff; }
.analysis-fen-row { display: grid; grid-template-columns: 1fr auto auto; gap: 6px; width: min(100%, 690px); margin: 7px auto 0; padding-left: 29px; }
.analysis-fen-row input { min-width: 0; padding: 8px 10px; border: 1px solid #acb8c8; border-radius: 7px; font: inherit; }
.analysis-status { min-height: 20px; width: min(100%, 690px); margin: 5px auto 0; padding-left: 29px; color: #087a39; font-weight: 700; }
.analysis-status.is-error { color: #bd1e1e; }
.analysis-sidebar { display: grid; grid-template-columns: 1fr 1fr; grid-template-rows: minmax(300px, 1fr) minmax(230px, auto); gap: 10px; min-width: 0; }
.analysis-card { min-width: 0; overflow: hidden; border: 1px solid #d5dde8; border-radius: 10px; background: #fbfcfe; }
.analysis-engine-card { grid-column: 1 / -1; display: flex; flex-direction: column; }
.analysis-moves-card, .analysis-database-card { min-height: 220px; }
.analysis-card-heading { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 12px 14px; border-bottom: 1px solid #dce3ec; background: #fff; }
.analysis-card-heading h2 { margin: 1px 0 0; font-size: 1.05rem; }
.analysis-kicker { color: var(--site-blue); font-size: .7rem; font-weight: 900; letter-spacing: .08em; }
.analysis-switch { display: flex; align-items: center; gap: 6px; font-weight: 700; }
.analysis-engine-settings { display: grid; grid-template-columns: 150px 90px 80px auto; gap: 8px; padding: 10px 14px; }
.analysis-engine-settings label { display: grid; gap: 3px; color: #475569; font-size: .78rem; font-weight: 800; }
.analysis-engine-settings select { min-height: 34px; padding: 5px 7px; border: 1px solid #b9c4d2; border-radius: 6px; background: #fff; }
.analysis-engine-state { padding: 0 14px 8px; color: #64748b; font-size: .84rem; }
.analysis-pv-list { display: grid; gap: 5px; padding: 0 10px 8px; overflow: auto; }
.analysis-pv-row { display: grid; grid-template-columns: 62px 1fr auto; gap: 8px; align-items: center; width: 100%; padding: 9px; border: 1px solid transparent; border-radius: 7px; background: #fff; text-align: left; cursor: pointer; }
.analysis-pv-row:hover { border-color: #bcd0ff; background: #edf3ff; }
.analysis-pv-score { font-weight: 900; color: #0f3c8f; }
.analysis-pv-line { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 650; }
.analysis-pv-row small { color: #64748b; }
.analysis-engine-note { margin-top: auto; padding: 8px 14px 11px; color: #778397; }
.analysis-text-button { border: 0; background: transparent; color: var(--site-blue); cursor: pointer; }
.analysis-move-list, .analysis-db-moves { max-height: 245px; padding: 10px; overflow: auto; }
.analysis-move-grid { display: grid; grid-template-columns: 32px 1fr 1fr; gap: 4px; align-items: center; }
.analysis-move-number { color: #64748b; font-size: .82rem; }
.analysis-move-grid button { min-width: 0; padding: 7px 8px; border: 0; border-radius: 5px; background: transparent; text-align: left; cursor: pointer; }
.analysis-move-grid button:hover, .analysis-move-grid button.is-current { background: #dfeaff; color: #163c95; font-weight: 800; }
.analysis-opening-name { padding: 10px 12px 0; color: #174ea6; font-weight: 850; }
.analysis-db-summary { padding: 8px 12px; }
.analysis-result-bar { display: flex; height: 9px; overflow: hidden; border-radius: 99px; background: #ddd; }
.analysis-result-bar span:nth-child(1) { background: #f8fafc; }
.analysis-result-bar span:nth-child(2) { background: #9aa4b2; }
.analysis-result-bar span:nth-child(3) { background: #182131; }
.analysis-results > div:last-child { display: flex; flex-wrap: wrap; gap: 6px 10px; margin-top: 6px; color: #64748b; font-size: .72rem; }
.analysis-db-row { display: grid; grid-template-columns: 55px 1fr auto; gap: 8px; width: 100%; padding: 8px; border: 0; border-bottom: 1px solid #e4e9f0; background: transparent; text-align: left; cursor: pointer; }
.analysis-db-row:hover { background: #edf3ff; }
.analysis-db-row span { color: #64748b; font-size: .78rem; }
.analysis-db-row b { color: #174ea6; }
.analysis-empty { margin: 6px; color: #64748b; }

body.is-analysis-tool .tools-workspace { padding-top: 12px; padding-bottom: 12px; }
body.is-analysis-tool .tool-description { display: none; }
body.is-analysis-tool .tools-heading { margin-bottom: 8px; }

@media (max-width: 1150px) {
  .analysis-layout { grid-template-columns: minmax(430px, 620px) minmax(330px, 1fr); }
  .analysis-sidebar { grid-template-columns: 1fr; grid-template-rows: auto; }
  .analysis-engine-card { grid-column: auto; }
  .position-controls { grid-template-columns: 1fr; }
  .position-control-card, .position-control-card:first-child, .position-control-card:nth-child(2), .position-control-card.position-use-card { grid-column: auto; }
  .position-add-course { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 900px) {
  .tools-heading-with-tabs { align-items: flex-start; }
  .analysis-layout { grid-template-columns: 1fr; }
  .analysis-chessboard { min-width: 0; width: min(100%, 650px); }
  .analysis-sidebar { grid-template-columns: 1fr; }
  .position-builder-grid { grid-template-columns: 1fr; }
}

/* v13.5: compact desktop analysis layout and side-aware evaluation label. */
@media (min-width: 901px) {
  .analysis-layout {
    grid-template-columns: minmax(410px, 600px) minmax(360px, 1fr);
    min-height: 0;
    align-items: start;
  }
  .analysis-board-wrap {
    width: min(100%, 600px, max(420px, calc(100vh - 290px)));
  }
  .analysis-chessboard { min-width: 0; }
  .analysis-board-controls,
  .analysis-fen-row,
  .analysis-status {
    width: min(100%, 600px, max(420px, calc(100vh - 290px)));
  }
}
.analysis-engine-settings { grid-template-columns: 140px 86px 76px auto auto; }
.analysis-arrow-toggle.is-active { background: #e7f0ff; border-color: #7ba7ef; color: #0b55c8; }
.analysis-eval-bar > div { transition: height .22s ease, top .22s ease, bottom .22s ease; }
.analysis-eval-bar.is-flipped > div { top: 0; bottom: auto; }
.analysis-eval-bar span {
  top: auto;
  bottom: 6px;
  left: 50%;
  padding: 2px 1px;
  color: #fff;
  mix-blend-mode: normal;
  text-shadow: 0 1px 2px rgba(0,0,0,.65);
}
.analysis-eval-bar.is-white-advantage span { top: auto; bottom: 6px; color: #111827; text-shadow: 0 1px 1px rgba(255,255,255,.65); }
.analysis-eval-bar.is-black-advantage span { top: 6px; bottom: auto; color: #fff; }
.analysis-eval-bar.is-flipped.is-white-advantage span { top: 6px; bottom: auto; }
.analysis-eval-bar.is-flipped.is-black-advantage span { top: auto; bottom: 6px; }
@media (max-width: 1120px) {
  .analysis-engine-settings { grid-template-columns: repeat(3, minmax(0,1fr)); }
}

/* v13.8 analysis variation tree */
.analysis-tree { display:flex; flex-wrap:wrap; align-items:center; gap:5px 3px; line-height:1.9; }
.analysis-tree-move { display:inline-flex; align-items:center; gap:4px; min-height:30px; padding:3px 7px; border:0; border-radius:6px; background:transparent; color:#172b4d; cursor:pointer; font-size:.92rem; font-weight:700; }
.analysis-tree-move:hover { background:#eef4ff; }
.analysis-tree-move.is-current { background:#2865d8; color:#fff; }
.analysis-tree-move>span { color:#7c8aa0; font-size:.76rem; font-weight:750; }
.analysis-tree-move.is-current>span { color:#dce8ff; }
.analysis-variations { display:inline-flex; flex-wrap:wrap; align-items:center; gap:4px; width:100%; margin:2px 0 4px 12px; padding:7px 9px; border-left:3px solid #cbd9ed; border-radius:0 8px 8px 0; background:#f4f7fb; }
.analysis-variation { display:inline-flex; flex-wrap:wrap; align-items:center; gap:3px; color:#728098; }

/* v14.1.2: reserve every requested MultiPV row while Stockfish is calculating. */
.analysis-pv-row.is-loading{cursor:default;color:#8190a5;background:#f8fafc;border-color:transparent;box-shadow:none}
.analysis-pv-row.is-loading:hover{background:#f8fafc;border-color:transparent}
.analysis-pv-row.is-loading .analysis-pv-score{color:#6d7d94}

.analysis-board{grid-template-rows:repeat(8,minmax(0,1fr));min-width:0;min-height:0}


/* v14.5.2 — left-side masters database and compact three-column analysis */
.analysis-layout {
  grid-template-columns: minmax(270px, 320px) minmax(420px, 600px) minmax(360px, 640px);
  justify-content: center;
  align-items: start;
  gap: 12px;
  min-height: 0;
}
.analysis-database-column { min-width: 0; height: min(690px, calc(100dvh - 180px)); }
.analysis-database-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 430px;
  background: #f8fafc;
}
.analysis-sidebar {
  grid-template-columns: 1fr;
  grid-template-rows: minmax(320px, 1fr) minmax(190px, auto);
  max-height: calc(100dvh - 180px);
}
.analysis-engine-card { grid-column: auto; min-height: 0; }
.analysis-moves-card { min-height: 180px; }
.analysis-db-tabs {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  padding: 9px 12px;
  border-bottom: 1px solid #d8e1ed;
  background: #eaf2ff;
  color: #173b77;
  font-size: .78rem;
}
.analysis-db-tabs span { color: #64748b; font-weight: 700; }
.analysis-db-filters {
  display: grid;
  gap: 7px;
  padding: 10px 11px;
  border-bottom: 1px solid #dce4ef;
  background: #fff;
}
.analysis-db-filter-row {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 5px;
  color: #475569;
  font-size: .74rem;
  font-weight: 800;
}
.analysis-db-filter-row input {
  width: 100%;
  min-width: 0;
  height: 29px;
  padding: 3px 6px;
  border: 1px solid #b9c6d7;
  border-radius: 5px;
  background: #fdfefe;
  color: #172033;
  font-size: .76rem;
}
.analysis-db-filter-row input:focus {
  border-color: #4f86dc;
  outline: 2px solid rgba(52,120,200,.16);
}
.analysis-db-apply {
  min-height: 30px;
  border: 1px solid #91add8;
  border-radius: 6px;
  background: #edf4ff;
  color: #164c9c;
  cursor: pointer;
  font-size: .75rem;
  font-weight: 850;
}
.analysis-db-apply:hover { background: #dfeaff; }
.analysis-opening-name {
  padding: 10px 11px 8px;
  border-bottom: 1px solid #e0e6ee;
  color: #174ea6;
  font-size: .82rem;
  line-height: 1.35;
}
.analysis-db-head {
  display: grid;
  grid-template-columns: 44px 62px 1fr;
  gap: 7px;
  padding: 6px 9px;
  border-bottom: 1px solid #d8e0ea;
  background: #f0f3f7;
  color: #64748b;
  font-size: .63rem;
  font-weight: 850;
  text-transform: uppercase;
  letter-spacing: .025em;
}
.analysis-db-moves {
  flex: 1;
  min-height: 120px;
  max-height: none;
  padding: 0;
  overflow: auto;
}
.analysis-db-row {
  display: grid;
  grid-template-columns: 44px 62px 1fr;
  align-items: center;
  gap: 7px;
  min-height: 36px;
  padding: 5px 8px;
  border: 0;
  border-bottom: 1px solid #e4e9f0;
  background: #fff;
  color: #172033;
  text-align: left;
  cursor: pointer;
}
.analysis-db-row:hover { background: #eaf2ff; }
.analysis-db-row strong { font-size: .82rem; }
.analysis-db-frequency {
  display: flex;
  align-items: baseline;
  gap: 4px;
  color: #334155 !important;
  font-size: .7rem !important;
  font-weight: 800;
}
.analysis-db-frequency small { color: #8490a2; font-size: .62rem; font-weight: 700; }
.analysis-db-result {
  display: flex;
  min-width: 0;
  height: 17px;
  overflow: hidden;
  border: 1px solid #aeb7c3;
  border-radius: 4px;
  background: #d6dbe1;
}
.analysis-db-result i {
  display: grid;
  place-items: center;
  min-width: 0;
  overflow: hidden;
  color: #fff;
  font-size: .58rem;
  font-style: normal;
  line-height: 1;
  text-shadow: 0 1px 1px rgba(0,0,0,.45);
}
.analysis-db-result i:nth-child(1) { background: #f7f8fa; color: #263142; text-shadow: none; }
.analysis-db-result i:nth-child(2) { background: #8f98a4; }
.analysis-db-result i:nth-child(3) { background: #27313f; }
.analysis-db-summary {
  padding: 9px 11px 11px;
  border-top: 1px solid #dce4ee;
  background: #fff;
}
.analysis-result-bar { height: 12px; border: 1px solid #aeb7c3; }
.analysis-result-bar span:nth-child(1) { background: #f7f8fa; }
.analysis-result-bar span:nth-child(2) { background: #8f98a4; }
.analysis-result-bar span:nth-child(3) { background: #27313f; }

@media (max-width: 1180px) and (min-width: 901px) {
  .analysis-layout {
    grid-template-columns: minmax(245px, 285px) minmax(420px, 600px);
  }
  .analysis-sidebar {
    grid-column: 1 / -1;
    grid-template-columns: minmax(0, 1.4fr) minmax(280px, .6fr);
    grid-template-rows: auto;
    max-height: none;
  }
}
@media (max-width: 900px) {
  .analysis-layout { grid-template-columns: 1fr; }
  .analysis-database-column { height: auto; order: 2; }
  .analysis-board-column { order: 1; }
  .analysis-sidebar { order: 3; max-height: none; }
  .analysis-database-card { height: min(620px, 75dvh); }
}

/* v14.5.5 — show every selected MultiPV line in the desktop viewport. */
.analysis-pv-list {
  flex: 0 0 auto;
  gap: 3px;
  padding: 0 8px 6px;
}
.analysis-pv-row {
  min-height: 34px;
  grid-template-columns: 56px minmax(0, 1fr) auto;
  gap: 7px;
  padding: 5px 7px;
  font-size: .84rem;
}
.analysis-pv-row small { font-size: .72rem; }
.analysis-engine-state {
  min-height: 24px;
  padding: 0 11px 5px;
  font-size: .78rem;
}

@media (min-width: 1200px) and (min-height: 680px) {
  body.is-analysis-tool { overflow: hidden; }

  body.is-analysis-tool .tools-workspace {
    display: flex;
    flex-direction: column;
    height: calc(100dvh - 72px);
    min-height: 0;
    box-sizing: border-box;
  }
  body.is-analysis-tool .tools-heading { flex: 0 0 auto; }
  body.is-analysis-tool .tool-panel[data-tool-panel="analysis"].is-active {
    display: block;
    flex: 1 1 auto;
    min-height: 0;
    overflow: hidden;
  }

  .analysis-board-app {
    height: 100%;
    min-height: 0;
  }
  .analysis-layout {
    height: 100%;
    min-height: 0;
    padding: 10px 12px;
    align-items: stretch;
  }
  .analysis-board-column {
    min-height: 0;
    overflow: hidden;
  }
  .analysis-database-column,
  .analysis-sidebar {
    height: 100%;
    max-height: none;
    min-height: 0;
  }

  .analysis-sidebar {
    grid-template-rows: auto minmax(105px, 1fr);
    overflow: hidden;
  }
  .analysis-engine-card {
    min-height: 0;
  }
  .analysis-card-heading {
    padding: 9px 11px;
  }
  .analysis-engine-settings {
    grid-template-columns: minmax(126px, 1.45fr) minmax(72px, .8fr) minmax(68px, .72fr) auto auto;
    gap: 6px;
    padding: 6px 10px;
  }
  .analysis-engine-settings label {
    gap: 2px;
    font-size: .72rem;
  }
  .analysis-engine-settings select,
  .analysis-engine-settings button {
    min-height: 32px;
    padding-block: 4px;
  }
  .analysis-pv-list {
    overflow: visible;
  }
  .analysis-engine-note {
    display: none;
  }

  .analysis-moves-card {
    display: flex;
    flex-direction: column;
    min-height: 105px;
  }
  .analysis-move-list {
    flex: 1 1 auto;
    min-height: 0;
    max-height: none;
    overflow: auto;
  }
}

/* v15 touch-first analysis and course workflows */
@media(max-width:760px){body.is-analysis-tool .site-header{position:sticky;top:0}.analysis-layout{display:flex;flex-direction:column;padding:6px}.analysis-board-column{order:1}.analysis-database-column{order:2}.analysis-sidebar{order:3}.analysis-board-wrap{width:100%;max-width:100vw}.analysis-board-controls{display:grid;grid-template-columns:repeat(5,1fr);position:sticky;bottom:0;z-index:10}.analysis-board-controls button{min-height:44px}.analysis-fen-row{grid-template-columns:1fr repeat(3,auto)}.analysis-database-column,.analysis-sidebar{max-height:none}.tools-heading-with-tabs{align-items:flex-start;gap:8px}.tools-tabs{width:100%;overflow-x:auto}.standalone-course-card{grid-template-columns:72px minmax(0,1fr)}.standalone-course-card-actions{grid-column:1/-1;display:grid;grid-template-columns:repeat(2,1fr)}.standalone-course-card-actions .button{min-height:44px}.editor-shell{overflow-x:auto}}

/* v15.0.1 — scrolling must be restored after leaving full-viewport tools. */
html,body{min-height:100%}
body:not(.is-analysis-tool):not(.is-playing-game){overflow-y:auto}
.standalone-view.is-active{min-height:calc(100dvh - 72px)}


/* v15.1.2 — larger desktop analysis board and move context menu. */
@media (min-width:1200px) {
  body.is-analysis-tool { overflow-y:auto; }
  body.is-analysis-tool .tools-workspace {
    height:auto;
    min-height:calc(100dvh - 72px);
    overflow:visible;
  }
  body.is-analysis-tool .tool-panel[data-tool-panel="analysis"].is-active { overflow:visible; }
  .analysis-layout {
    grid-template-columns:minmax(255px,310px) minmax(590px,680px) minmax(350px,1fr);
    align-items:start;
    min-height:0;
  }
  .analysis-board-wrap,
  .analysis-board-controls,
  .analysis-fen-row,
  .analysis-status { width:min(100%,680px); }
  .analysis-database-column,
  .analysis-sidebar {
    height:min(680px,calc(100dvh - 155px));
    max-height:none;
  }
}
.analysis-move-context-menu {
  position:fixed;
  z-index:30000;
  min-width:210px;
  padding:6px;
  border:1px solid #cbd5e1;
  border-radius:10px;
  background:#fff;
  box-shadow:0 16px 44px rgba(15,23,42,.24);
}
.analysis-move-context-menu button {
  width:100%;
  padding:10px 12px;
  border:0;
  border-radius:7px;
  background:transparent;
  color:#b42318;
  text-align:left;
  font:inherit;
  font-weight:800;
  cursor:pointer;
}
.analysis-move-context-menu button:hover { background:#fff0ee; }
html[data-theme="dark"] .analysis-move-context-menu { background:#182130; border-color:#3a475a; }
html[data-theme="dark"] .analysis-move-context-menu button { color:#ff8d83; }
html[data-theme="dark"] .analysis-move-context-menu button:hover { background:#3b2020; }


/* v15.1.4 — always-visible engine-arrow control. */
.analysis-engine-heading-actions{display:flex;align-items:center;justify-content:flex-end;gap:9px;flex-wrap:wrap}
.analysis-engine-heading-actions .analysis-arrow-toggle{min-height:34px;padding:6px 10px;border:1px solid #c8d1dd;border-radius:7px;background:#fff;color:#273449;font:inherit;font-weight:750;cursor:pointer;white-space:nowrap}
.analysis-engine-heading-actions .analysis-arrow-toggle.is-active{background:#e7f0ff;border-color:#7ba7ef;color:#0b55c8}
.analysis-engine-settings{grid-template-columns:minmax(118px,1.45fr) minmax(68px,.75fr) minmax(68px,.75fr) minmax(88px,auto)}
@media(max-width:1180px){.analysis-engine-settings{grid-template-columns:repeat(3,minmax(0,1fr))}.analysis-engine-settings>[data-analysis-action="analyse"]{grid-column:1/-1}}
@media(max-width:520px){.analysis-card-heading{align-items:flex-start}.analysis-engine-heading-actions{align-items:flex-end;flex-direction:column}.analysis-engine-heading-actions .analysis-arrow-toggle{min-height:40px}}


/* v15.1.6 navigation anchors use the same visual language as buttons. */
.site-nav > .site-nav-link{position:relative;display:flex;align-items:center;height:70px;color:var(--site-navy);text-decoration:none;font-weight:800}
.site-nav > .site-nav-link:hover,.site-nav > .site-nav-link.is-active{color:var(--site-blue)}
.site-nav > .site-nav-link.is-active::after{content:"";position:absolute;left:10px;right:10px;bottom:0;height:3px;border-radius:3px;background:currentColor}

/* v15.1.10 compact Prepare navigation label */
.site-nav > .prepare-nav-link{font-weight:800}


/* v15.1.14 — consistent bold top navigation on every page. */
.site-header .site-nav > button,
.site-header .site-nav > .site-nav-link,
.site-header .site-nav > .site-nav-item > button{font-weight:800!important}
.site-header .site-nav > button,.site-header .site-nav > .site-nav-link,.site-header .site-nav > .site-nav-item > button,.site-header .site-nav .site-nav-link{font-weight:800!important}

/* v15.1.16 — identical typography for every primary navigation destination. */
.site-header .site-nav > button,
.site-header .site-nav > .site-nav-link,
.site-header .site-nav > .site-nav-item > button {
  font-family: inherit !important;
  font-size: .92rem !important;
  font-style: normal !important;
  font-weight: 800 !important;
  font-synthesis: none !important;
  font-variation-settings: "wght" 800 !important;
  letter-spacing: 0 !important;
  line-height: 1.1 !important;
}

/* v15.1.55 — keep Stockfish variations next to the board on phones. */
.analysis-mobile-engine-slot{display:none}
@media(max-width:760px){
  .analysis-mobile-engine-slot{display:block;width:min(100%,690px);margin:0 auto 7px;padding-left:29px}
  .analysis-mobile-engine-slot:empty{display:none}
  .analysis-mobile-engine-slot .analysis-engine-card{position:sticky;top:72px;z-index:18;max-height:190px;box-shadow:0 9px 24px rgba(15,23,42,.18)}
  .analysis-mobile-engine-slot .analysis-card-heading{padding:5px 8px}
  .analysis-mobile-engine-slot .analysis-card-heading h2{font-size:.86rem}
  .analysis-mobile-engine-slot .analysis-kicker{font-size:.58rem}
  .analysis-mobile-engine-slot .analysis-engine-settings{grid-template-columns:minmax(92px,1.25fr) minmax(50px,.7fr) minmax(50px,.7fr) auto auto;gap:4px;padding:5px 7px}
  .analysis-mobile-engine-slot .analysis-engine-settings label{gap:0}
  .analysis-mobile-engine-slot .analysis-engine-settings label>span{display:none}
  .analysis-mobile-engine-slot .analysis-engine-settings select,.analysis-mobile-engine-slot .analysis-engine-settings button{min-height:31px;padding:4px 5px;font-size:.72rem}
  .analysis-mobile-engine-slot .analysis-engine-state{padding:0 8px 4px;font-size:.7rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
  .analysis-mobile-engine-slot .analysis-pv-list{max-height:76px;padding:0 6px 6px}
  .analysis-mobile-engine-slot .analysis-pv-row{grid-template-columns:46px minmax(0,1fr);gap:5px;padding:5px 6px}
  .analysis-mobile-engine-slot .analysis-pv-row small{display:none}
  .analysis-mobile-engine-slot .analysis-pv-score,.analysis-mobile-engine-slot .analysis-pv-line{font-size:.72rem}
  .analysis-mobile-engine-slot .analysis-engine-note{display:none}
}
@media(max-width:520px){
  .analysis-mobile-engine-slot{padding-left:0}
  .analysis-mobile-engine-slot .analysis-engine-settings{grid-template-columns:repeat(3,minmax(0,1fr))}
  .analysis-mobile-engine-slot .analysis-card-heading{align-items:center}
  .analysis-mobile-engine-slot .analysis-engine-heading-actions{flex-direction:row;align-items:center}
  .analysis-mobile-engine-slot .analysis-engine-heading-actions .analysis-arrow-toggle{min-height:31px}
}


/* v15.1.60 — canonical board interaction markers. */
.analysis-square.is-selected::after,.study-square.is-selected::after,.puzzle-square.is-selected::after{border-color:#f1c419!important}
.analysis-square.is-quiet-target::after,.study-square.is-quiet-target::after,.puzzle-square.is-quiet-target::after{background:rgba(44,51,58,.36)!important}
.analysis-square.is-capture-target::after,.study-square.is-capture-target::after,.puzzle-square.is-capture-target::after{border-color:rgba(44,51,58,.36)!important;background:transparent!important}

/* Board Editor v15.1.60: TJK-Chess workspace, not a Lichess clone. */
.position-builder-grid{grid-template-columns:minmax(430px,.88fr) minmax(520px,1.12fr);gap:22px;align-items:start}
.position-controls{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:start}
.position-control-card{border-radius:16px!important;border:1px solid var(--line,#dbe3ef)!important;box-shadow:0 8px 24px rgba(15,31,54,.05);overflow:hidden}
.position-control-card>h2{margin:-1px -1px 14px;padding:12px 15px;border-bottom:1px solid var(--line,#dbe3ef);background:linear-gradient(180deg,rgba(14,87,209,.08),rgba(14,87,209,.025));font-size:1rem}
.position-use-card{grid-column:1/-1}
.position-builder-status-strip{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:12px;padding:9px 11px;border:1px solid #cfd9e8;border-radius:10px;background:#f7f9fc;color:#42536d;font-size:.8rem;font-weight:750}
.position-builder-status-strip.is-valid{border-color:#acd29b;background:#f2f8ef;color:#315b2d}
.position-builder-status-strip.is-invalid{border-color:#e7b2ad;background:#fff5f3;color:#932b22}
.position-action[data-pb-action="analysis"].is-illegal{opacity:.62;border-style:dashed}
@media(max-width:1100px){.position-builder-grid{grid-template-columns:1fr}.position-controls{grid-template-columns:1fr 1fr}}
@media(max-width:720px){.position-controls{grid-template-columns:1fr}.position-use-card{grid-column:auto}}


/* Board Editor v15.1.60b — distinct TJK controls and legality gate. */
.position-board-column{padding:14px;border:1px solid var(--line,#dbe3ef);border-radius:18px;background:var(--panel,#fff);box-shadow:0 10px 28px rgba(15,31,54,.06)}
.position-palette{border-radius:12px!important;padding:7px!important;background:color-mix(in srgb,var(--site-blue,#0e57d1) 6%,var(--panel,#fff))!important}
.position-action-list{display:grid!important;grid-template-columns:1fr 1fr!important;gap:8px!important}
.position-action{justify-content:flex-start!important;border-radius:10px!important}
.position-action[data-pb-action="analysis"].is-illegal{opacity:.68;border-style:dashed!important;cursor:not-allowed}
.position-builder-status-strip strong{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;text-align:right}
html[data-theme="dark"] .position-board-column{background:#151d29;border-color:#344258}
html[data-theme="dark"] .position-palette{background:#1b2738!important}
html[data-theme="dark"] .position-builder-status-strip{background:#182333;border-color:#3d4b60;color:#c6d0df}
html[data-theme="dark"] .position-builder-status-strip.is-valid{background:#17281b;border-color:#416b44;color:#c9e9cb}
html[data-theme="dark"] .position-builder-status-strip.is-invalid{background:#351e21;border-color:#744348;color:#ffd4d2}
@media(max-width:560px){.position-action-list{grid-template-columns:1fr!important}}


/* v15.1.66 — compact, full-width mobile analysis board without page jumps. */
@media(max-width:760px){
  body.is-analysis-tool .tools-workspace,body.is-analysis-tool .tool-panel[data-tool-panel="analysis"].is-active{width:100%!important;max-width:none!important}
  body.is-analysis-tool .tools-heading{padding:5px 8px!important;margin:0!important}
  body.is-analysis-tool .tools-heading>p,.analysis-status,.analysis-fen-row{display:none!important}
  .analysis-layout{width:100vw!important;max-width:100vw!important;margin:0!important;padding:0!important;gap:6px!important}
  .analysis-board-column{width:100vw!important;max-width:100vw!important;margin:0!important}
  .analysis-mobile-engine-slot{width:100%!important;padding:0 4px!important}
  .analysis-board-wrap{width:100vw!important;max-width:100vw!important;margin:0!important;padding:0 2px!important}
  .analysis-board-stage{min-width:0!important;flex:1 1 auto!important;width:auto!important}
  .analysis-board-controls{margin:0 3px!important}
  .analysis-database-column{width:100%!important;margin-top:0!important;padding:0 4px!important}
  .analysis-database-card{height:min(480px,58dvh)!important;min-height:330px!important}
  .analysis-card-heading{padding:7px 9px!important}.analysis-db-filters{padding:6px 8px!important;gap:5px!important}.analysis-opening-name{padding:6px 8px!important}
}

@media(max-width:760px){
  body.is-analysis-tool .tools-workspace,body.is-analysis-tool .tools-content{padding-left:0!important;padding-right:0!important;margin-left:0!important;margin-right:0!important;max-width:none!important;width:100%!important}
  body.is-analysis-tool .analysis-board-column{width:100vw!important;max-width:100vw!important;align-self:center!important}
  body.is-analysis-tool .analysis-board-wrap{grid-template-columns:20px minmax(0,1fr)!important;gap:2px!important;width:100vw!important;max-width:100vw!important}
  body.is-analysis-tool .analysis-board-stage{width:100%!important;max-width:none!important}
  body.is-analysis-tool .analysis-chessboard{width:100%!important;height:auto!important;aspect-ratio:1!important}
  body.is-analysis-tool .analysis-mobile-engine-slot{width:100%!important;padding:0 3px!important}
  body.is-analysis-tool .analysis-database-column{order:2!important;margin-top:0!important;padding:0 3px!important}
  body.is-analysis-tool .analysis-database-card{height:min(430px,52dvh)!important;min-height:280px!important;border-radius:10px!important}
  body.is-analysis-tool .analysis-database-card .analysis-card-heading{padding:8px 10px!important}
  body.is-analysis-tool .analysis-database-card .analysis-card-heading h2{font-size:1.05rem!important;margin:0!important}
  body.is-analysis-tool .analysis-db-tabs{padding:6px 10px!important}
  body.is-analysis-tool .analysis-db-filters{padding:7px 10px!important;gap:5px!important}
  body.is-analysis-tool .analysis-db-filter-row{gap:5px!important}
  body.is-analysis-tool .analysis-db-apply{min-height:38px!important}
  body.is-analysis-tool .analysis-opening-name{padding:5px 10px!important}
  body.is-analysis-tool .analysis-engine-note{display:none!important}
}

/* v15.1.72: desktop analysis workspace density equivalent to the former 90% browser zoom. */
@media (min-width:1000px){[data-tool-panel="analysis"].is-active{zoom:.90;} [data-tool-panel="analysis"].is-active .analysis-workspace{max-width:111.111%;}}

/* v15.1.73 — mobile database filters collapsed by default. */
.analysis-db-tab-actions{display:flex;align-items:center;gap:8px}.analysis-db-filter-toggle{display:none;border:1px solid #91add8;border-radius:6px;background:#edf4ff;color:#164c9c;font-weight:800;padding:4px 8px}
@media(max-width:760px){body.is-analysis-tool .analysis-db-filter-toggle{display:inline-flex!important;align-items:center}body.is-analysis-tool .analysis-db-filters{display:none!important}body.is-analysis-tool .analysis-db-filters.is-open{display:grid!important}body.is-analysis-tool .analysis-db-tabs{align-items:center}body.is-analysis-tool .analysis-db-tab-actions{margin-left:auto}}

/* v15.1.74 — phone analysis: remove redundant page title, keep the engine
   immediately beside the board and never create a 100vw-with-padding overflow. */
@media(max-width:760px){
  body.is-analysis-tool{overflow-x:hidden!important}
  body.is-analysis-tool .tools-heading>div:first-child{display:none!important}
  body.is-analysis-tool .tools-heading{min-height:0!important;padding:2px 4px!important;margin:0!important;gap:2px!important}
  body.is-analysis-tool .tools-tabs{width:auto!important;max-width:100%!important;margin-left:auto!important;gap:4px!important;overflow:visible!important}
  body.is-analysis-tool .tools-tabs button{min-height:30px!important;padding:4px 8px!important;font-size:.72rem!important}
  body.is-analysis-tool .tools-workspace,body.is-analysis-tool .tools-content,
  body.is-analysis-tool .analysis-layout,body.is-analysis-tool .analysis-board-column,
  body.is-analysis-tool .analysis-board-wrap{width:100%!important;max-width:100%!important;min-width:0!important;box-sizing:border-box!important}
  body.is-analysis-tool .analysis-layout{padding:0!important;overflow-x:hidden!important}
  body.is-analysis-tool .analysis-board-wrap{grid-template-columns:18px minmax(0,1fr)!important;padding:0 2px!important;gap:2px!important}
  body.is-analysis-tool .analysis-mobile-engine-slot{display:block!important;width:100%!important;max-width:100%!important;margin:0 0 4px!important;padding:0 2px!important;overflow:visible!important}
  body.is-analysis-tool .analysis-mobile-engine-slot:empty{display:none!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-card{display:flex!important;position:static!important;top:auto!important;z-index:auto!important;width:100%!important;max-height:none!important;min-height:0!important;border-radius:7px!important;box-shadow:none!important;overflow:visible!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-card-heading{display:none!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-settings{display:grid!important;grid-template-columns:minmax(88px,1.35fr) 48px 48px 66px 70px!important;gap:3px!important;padding:4px!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-settings select,
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-settings button{min-width:0!important;min-height:29px!important;padding:3px 4px!important;font-size:.68rem!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-state{display:block!important;padding:1px 6px 3px!important;font-size:.66rem!important;line-height:1.15!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-pv-list{display:grid!important;min-height:0!important;max-height:none!important;padding:0 4px 4px!important;overflow:visible!important;gap:2px!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-pv-row{min-height:27px!important;padding:3px 5px!important;grid-template-columns:43px minmax(0,1fr)!important;gap:4px!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-pv-score,
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-pv-line{font-size:.68rem!important;line-height:1.15!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-pv-line{white-space:nowrap!important;overflow:hidden!important;text-overflow:ellipsis!important}
  body.is-analysis-tool .analysis-board-controls{position:static!important}
}
@media(max-width:430px){
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-settings{grid-template-columns:minmax(82px,1fr) 44px 44px 58px 62px!important}
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-settings select,
  body.is-analysis-tool .analysis-mobile-engine-slot .analysis-engine-settings button{font-size:.63rem!important;padding-inline:2px!important}
}

/* v15.1.75 — Lichess-style full-width main line and branch guides. */
.analysis-tree{display:block;width:100%;line-height:1.75;padding:0!important}
.analysis-mainline-row{display:flex;align-items:center;width:100%;min-height:36px;padding:2px 6px;box-sizing:border-box;border-bottom:1px solid #e3e8f0;background:transparent}
.analysis-mainline-row .analysis-tree-move{flex:0 0 auto}
.analysis-variations{display:block;width:calc(100% - 14px);box-sizing:border-box;margin:0 0 2px 14px;padding:2px 0 2px 15px;border-left:3px solid #c5cfdd;border-radius:0;background:transparent}
.analysis-variation-line{position:relative;display:block;width:100%;box-sizing:border-box;padding:3px 5px 3px 0;color:#657389}
.analysis-variation-line::before{content:"";position:absolute;left:-15px;top:18px;width:12px;border-top:2px solid #c5cfdd}
.analysis-nested-variations{display:block;margin:2px 0 2px 12px;padding-left:14px;border-left:2px solid #d3dbe6}
.analysis-nested-variations>.analysis-variation-line::before{left:-14px;width:11px;border-top-color:#d3dbe6}
html[data-theme="dark"] .analysis-mainline-row{border-color:#344153}
html[data-theme="dark"] .analysis-variations,html[data-theme="dark"] .analysis-variation-line::before{border-color:#566477}
html[data-theme="dark"] .analysis-nested-variations,html[data-theme="dark"] .analysis-nested-variations>.analysis-variation-line::before{border-color:#445265}

/* v15.1.76 — analysis variation hierarchy and mobile board editor width. */
.analysis-mainline-row{display:grid!important;grid-template-columns:42px minmax(0,1fr) minmax(0,1fr);align-items:stretch;width:100%;min-height:43px;padding:0!important;box-sizing:border-box}
.analysis-mainline-number{display:flex;align-items:center;justify-content:center;color:#758196;font-size:13px;font-weight:800;border-right:1px solid #dbe2ec}
.analysis-mainline-cell{display:flex;align-items:stretch;min-width:0}
.analysis-mainline-cell+.analysis-mainline-cell{border-left:1px solid #edf1f6}
.analysis-mainline-cell>.analysis-move-unit{display:flex;flex:1;min-width:0}
.analysis-mainline-cell .analysis-tree-move{display:flex;align-items:center;width:100%;min-width:0;margin:0!important;padding:7px 12px!important;border-radius:0!important;font-size:17px!important;line-height:1.25!important;box-sizing:border-box}
.analysis-mainline-cell .analysis-move-number{display:none}
.analysis-variation-line .analysis-tree-move{font-size:14px!important}
.analysis-variation-line[data-variation-depth="2"] .analysis-tree-move{font-size:13px!important}
.analysis-variation-line[data-variation-depth="3"] .analysis-tree-move{font-size:12.5px!important}
.analysis-variation-line[data-variation-depth="4"] .analysis-tree-move,.analysis-variation-line[data-variation-depth="5"] .analysis-tree-move,.analysis-variation-line[data-variation-depth="6"] .analysis-tree-move{font-size:12px!important}
html[data-theme="dark"] .analysis-mainline-number{border-color:#344153;color:#9aa7b9}
html[data-theme="dark"] .analysis-mainline-cell+.analysis-mainline-cell{border-color:#293548}

@media(max-width:620px){
  .position-builder-grid{padding:4px!important;gap:7px!important}
  .position-board-column{width:calc(100dvw - 8px)!important;max-width:none!important;padding:3px!important;margin:0!important;border-radius:8px!important;box-sizing:border-box}
  .position-board-wrap,.position-builder-board-wrap,.position-board{max-width:none!important}
  .analysis-mainline-row{grid-template-columns:34px minmax(0,1fr) minmax(0,1fr);min-height:39px}
  .analysis-mainline-cell .analysis-tree-move{font-size:15px!important;padding:6px 8px!important}
  .analysis-variation-line .analysis-tree-move{font-size:13px!important}
}
@media(max-width:620px){
  .tools-workspace{padding-left:4px!important;padding-right:4px!important}
  .tool-panel[data-tool-panel="position"]{width:100%!important;max-width:none!important}
  .position-builder{width:100%!important;max-width:none!important}
}
/* v15.1.76 — extra analysis knowledge action remains in one compact FEN row. */
.analysis-fen-row{grid-template-columns:minmax(0,1fr) repeat(4,auto)}
@media(max-width:980px) and (min-width:761px){.analysis-fen-row{grid-template-columns:minmax(0,1fr) repeat(2,auto)}.analysis-fen-row [data-analysis-action="share"],.analysis-fen-row [data-analysis-action="knowledge"]{grid-row:2}}

/* v15.1.77 — long translations must never collide with header actions. */
.site-header{min-width:0}.site-nav{min-width:0;gap:0}.site-actions{min-width:max-content}.site-nav>.site-nav-item,.site-nav>.site-nav-link,.site-nav>button{min-width:0!important}.site-nav>.site-nav-item>button,.site-nav>.site-nav-link,.site-nav>button{padding-inline:clamp(9px,1.15vw,20px)!important;white-space:nowrap}
@media(max-width:1380px) and (min-width:901px){.site-header{padding-inline:18px!important}.site-nav{margin-left:18px!important}.site-actions{gap:10px!important}.site-header .site-nav>.site-nav-item>button,.site-header .site-nav>.site-nav-link,.site-header .site-nav>button{font-size:.82rem!important;padding-inline:8px!important}.site-language-select{max-width:130px!important}}
@media(max-width:1120px) and (min-width:901px){.site-brand{font-size:1.05rem}.site-brand-mark{width:30px;height:30px}.site-header .site-nav>.site-nav-item>button,.site-header .site-nav>.site-nav-link,.site-header .site-nav>button{font-size:.76rem!important;padding-inline:6px!important}.site-actions{font-size:1.2rem!important}.site-language-select{max-width:112px!important}}

/* v15.1.81 — Board Editor castling preferences are masked by board geometry. */
.castling-grid label.is-castling-ineffective{opacity:.68}
.castling-grid label.is-castling-ineffective::after{content:"ignored";margin-left:auto;color:#7b8799;font-size:9px;font-weight:800;text-transform:uppercase;letter-spacing:.04em}
html[data-theme="dark"] .castling-grid label.is-castling-ineffective::after{color:#aeb8c8}


/* v15.1.86 — slightly denser, vertically aligned analysis main line. */
.analysis-mainline-row{min-height:39px!important}
.analysis-mainline-cell{align-items:stretch!important}
.analysis-mainline-cell>.analysis-move-unit{align-items:stretch!important;height:100%!important}
.analysis-mainline-cell .analysis-tree-move{min-height:39px!important;padding:5px 10px!important;line-height:1.15!important;align-items:center!important;font-size:16px!important}

/* v15.1.91: compact, aligned move tree and full variation context menu */
.analysis-mainline-row{min-height:34px!important}
.analysis-mainline-cell,.analysis-mainline-number{min-height:34px!important;align-items:center!important}
.analysis-mainline-cell .analysis-tree-move{min-height:34px!important;padding:3px 9px!important;line-height:1.15!important;font-size:16px!important;align-items:center!important}
.analysis-variation-line{line-height:1.2!important}
.analysis-variation-line .analysis-tree-move{display:inline-flex!important;align-items:center!important;vertical-align:middle!important;min-height:27px;line-height:1.15!important}
.analysis-move-context-menu{min-width:235px}
.analysis-move-context-menu button{color:#243751!important;font-weight:750}
.analysis-move-context-menu button:hover:not(:disabled){background:#edf4ff!important}
.analysis-move-context-menu button:disabled{opacity:.38;cursor:default}
.analysis-move-context-menu button.is-danger{color:#b42318!important;border-top:1px solid #e4e9f0;margin-top:3px;padding-top:10px}
.analysis-move-context-menu button.is-danger:hover{background:#fff0ee!important}
html[data-theme="dark"] .analysis-move-context-menu button{color:#e5edf7!important}
html[data-theme="dark"] .analysis-move-context-menu button:hover:not(:disabled){background:#26364b!important}
html[data-theme="dark"] .analysis-move-context-menu button.is-danger{color:#ff8d83!important;border-top-color:#3a475a}
html[data-theme="dark"] .analysis-move-context-menu button.is-danger:hover{background:#3b2020!important}


/* v15.1.97 — subtler Lichess-like variation guides and slimmer move context menu. */
.analysis-variations{width:calc(100% - 12px)!important;margin:1px 0 2px 12px!important;padding:1px 0 1px 13px!important;border-left:2px solid rgba(148,163,184,.45)!important}
.analysis-variation-line{padding:2px 4px 2px 0!important;line-height:1.18!important}
.analysis-variation-line::before{left:-13px!important;top:16px!important;width:10px!important;border-top:1px solid rgba(148,163,184,.52)!important}
.analysis-nested-variations{margin:1px 0 1px 10px!important;padding-left:12px!important;border-left:1px solid rgba(148,163,184,.38)!important}
.analysis-nested-variations>.analysis-variation-line::before{left:-12px!important;width:9px!important;border-top-color:rgba(148,163,184,.42)!important}
.analysis-variation-line .analysis-tree-move{padding:1px 4px!important;min-height:24px!important}
.analysis-move-context-menu{min-width:188px!important}
.analysis-move-context-menu button{padding:6px 8px!important;font-size:11px!important}
.analysis-move-context-menu button.is-danger{padding-top:8px!important}
html[data-theme="dark"] .analysis-variations,html[data-theme="dark"] .analysis-variation-line::before{border-color:rgba(119,134,156,.52)!important}
html[data-theme="dark"] .analysis-nested-variations,html[data-theme="dark"] .analysis-nested-variations>.analysis-variation-line::before{border-color:rgba(102,117,141,.46)!important}

/* v15.1.98 — collapsible analysis database and filters. */
.analysis-db-heading-actions{display:flex;align-items:center;gap:5px}
.analysis-db-collapse{display:grid;place-items:center;width:28px;height:28px;padding:0;border:1px solid #c9d5e5;border-radius:6px;background:#fff;color:#173b77;font-size:1.15rem;font-weight:900;cursor:pointer}
.analysis-db-filters:not(.is-open){display:none!important}
.analysis-layout.is-db-collapsed{grid-template-columns:42px minmax(420px,600px) minmax(360px,640px)}
.analysis-database-column.is-collapsed{width:42px;min-width:42px;height:42px}
.analysis-database-column.is-collapsed .analysis-database-card{width:42px;height:42px;min-height:42px;overflow:hidden;background:transparent;border:0;box-shadow:none}
.analysis-database-column.is-collapsed .analysis-card-heading{width:42px;height:42px;padding:5px;border:0;background:transparent}
.analysis-database-column.is-collapsed .analysis-card-heading>div,
.analysis-database-column.is-collapsed .analysis-card-heading [data-analysis-action="refresh-db"],
.analysis-database-column.is-collapsed .analysis-card-heading [data-analysis-action="toggle-db-filters"],
.analysis-database-column.is-collapsed .analysis-database-card>.analysis-db-tabs,
.analysis-database-column.is-collapsed .analysis-database-card>.analysis-db-filters,
.analysis-database-column.is-collapsed .analysis-database-card>.analysis-opening-name,
.analysis-database-column.is-collapsed .analysis-database-card>.analysis-db-head,
.analysis-database-column.is-collapsed .analysis-database-card>.analysis-db-moves,
.analysis-database-column.is-collapsed .analysis-database-card>.analysis-db-summary{display:none!important}
.analysis-database-column.is-collapsed .analysis-card-heading>.analysis-db-heading-actions{display:block!important;visibility:visible!important}
.analysis-database-column.is-collapsed .analysis-db-collapse{width:32px;height:32px}
@media(max-width:980px){.analysis-layout.is-db-collapsed{display:flex!important}.analysis-database-column.is-collapsed{order:2!important;align-self:flex-start!important}}


/* v15.1.107 compact context menus */
.analysis-move-context-menu{display:grid!important;width:max-content!important;min-width:0!important;max-width:min(92vw,360px)!important}.analysis-move-context-menu button{width:100%!important;min-width:0!important;white-space:nowrap!important}
.analysis-db-moves{max-height:min(58vh,640px)!important}
.analysis-db-topgames{margin-top:10px;padding-top:9px;border-top:1px solid #d8e1ec;display:grid;gap:5px}.analysis-db-topgames-title{display:flex;align-items:baseline;justify-content:space-between;gap:8px;padding:0 2px 3px;font-size:11px;color:#607086}.analysis-db-topgames-title strong{color:#27364b;font-size:12px}.analysis-db-game-row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:3px 8px;width:100%;padding:8px 7px;border:0;border-radius:7px;background:transparent;color:inherit;text-align:left;cursor:pointer}.analysis-db-game-row:hover{background:#eef4fb}.analysis-db-game-players{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:780}.analysis-db-game-meta{grid-column:1/-1;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:10px;color:#728198}.analysis-db-game-result{grid-column:2;grid-row:1;font-weight:850}.analysis-db-topgames-note{padding:6px 2px;font-size:10px;color:#728198}html[data-theme="dark"] .analysis-db-topgames{border-top-color:#3a475a}html[data-theme="dark"] .analysis-db-topgames-title strong{color:#e5edf7}html[data-theme="dark"] .analysis-db-game-row:hover{background:#26364b}


/* v15.1.109 — keep the analysis board the same size when the database is collapsed. */
@media (min-width:1200px){
  .analysis-layout.is-db-collapsed{grid-template-columns:42px minmax(590px,680px) minmax(350px,1fr)!important}
  .analysis-layout.is-db-collapsed .analysis-board-wrap,
  .analysis-layout.is-db-collapsed .analysis-board-controls,
  .analysis-layout.is-db-collapsed .analysis-fen-row,
  .analysis-layout.is-db-collapsed .analysis-status{width:min(100%,680px)!important}
}


/* v15.1.110 — compact complete Top Games rows and remove duplicated tool titles. */
.analysis-db-game-row{padding:7px 7px!important;align-items:start!important}
.analysis-db-game-players{display:flex!important;flex-wrap:wrap!important;align-items:baseline!important;column-gap:.35em!important;row-gap:1px!important;overflow:visible!important;text-overflow:clip!important;white-space:normal!important;font-size:.82rem!important;font-weight:650!important;line-height:1.24!important;min-width:0!important}
.analysis-db-game-players>span{white-space:normal!important;overflow-wrap:anywhere!important}
.analysis-db-game-separator{flex:0 0 auto;color:#66758b;font-weight:500}
.analysis-db-game-result{font-size:.86rem!important;font-weight:750!important;line-height:1.25!important}
.analysis-db-game-meta{font-size:.69rem!important;font-weight:450!important;line-height:1.25!important;white-space:normal!important;overflow:visible!important;text-overflow:clip!important}
.analysis-db-topgames-title{font-size:.72rem!important}.analysis-db-topgames-title strong{font-size:.92rem!important;font-weight:750!important}
.tools-heading-with-tabs>div:first-child{display:none!important}
.tools-heading-with-tabs{justify-content:flex-end!important;min-height:0!important;margin-bottom:6px!important}

/* v15.1.128 — Lichess-like top-game rows: both rated players are always readable. */
.analysis-db-game-players{display:grid!important;gap:2px!important;min-width:0!important}
.analysis-db-game-players>.analysis-db-player-white,.analysis-db-game-players>.analysis-db-player-black{display:grid!important;grid-template-columns:18px minmax(0,1fr) auto!important;align-items:baseline!important;gap:5px!important;min-width:0!important;white-space:nowrap!important}
.analysis-db-game-players>.analysis-db-player-white>span,.analysis-db-game-players>.analysis-db-player-black>span{overflow:hidden!important;text-overflow:ellipsis!important;white-space:nowrap!important}
.analysis-db-game-players i{font-style:normal;color:#66758b}.analysis-db-game-players b{font-size:.76rem;font-weight:800;color:#53627a}
.analysis-db-game-row{grid-template-columns:minmax(0,1fr) 34px!important;min-height:54px!important}


/* v15.1.134 — conventional branch placeholder and slightly lighter main notation. */
.analysis-move-placeholder{display:flex;align-items:center;min-height:34px;width:100%;padding:3px 9px;box-sizing:border-box;color:#7c8aa0;font-size:16px;font-weight:650}
.analysis-mainline-cell .analysis-tree-move{font-weight:700!important}
.analysis-variation-line .analysis-tree-move{font-weight:680!important}
html[data-theme="dark"] .analysis-move-placeholder{color:#909baa}

/* v15.1.138 — one engine-line visual language across TJK-Chess; notation uses compact Unicode figurines again. */
/* Engine rows outside Analysis use the Analysis row itself, not lookalike CSS. */
.knowledge-engine-panel [data-knowledge-engine-lines],.knowledge-review-engine [data-knowledge-review-engine-lines],.training-personal-engine-lines,[data-puzzle-engine-lines],[data-review-pv-list]{display:grid;gap:3px}
.knowledge-engine-panel .analysis-pv-row,.knowledge-review-engine .analysis-pv-row,.training-personal-engine-lines .analysis-pv-row,[data-puzzle-engine-lines] .analysis-pv-row,[data-review-pv-list] .analysis-pv-row{font:inherit;color:inherit}

/* v15.1.137 — compact database chrome: keep controls, remove redundant title/count rows. */
.analysis-db-heading-compact{min-height:0!important;padding:7px 9px!important;justify-content:flex-end!important}
.analysis-db-heading-compact>.analysis-db-heading-actions{width:100%;justify-content:flex-end!important}
.analysis-db-status-only[hidden]{display:none!important}
.analysis-db-status-only:not([hidden]){margin:6px 9px 0;padding:7px 9px;border-radius:8px;background:rgba(59,109,224,.08);font-size:.78rem;line-height:1.3}


/* v15.1.142 — one compact main-line height across analysis-style notation. */
.analysis-mainline-row{min-height:30px!important}
.analysis-mainline-number,.analysis-mainline-cell{min-height:30px!important}
.analysis-mainline-cell .analysis-tree-move{min-height:30px!important;padding:2px 8px!important;line-height:1.12!important;font-size:15.5px!important}
@media(max-width:620px){.analysis-mainline-row{min-height:29px!important}.analysis-mainline-number,.analysis-mainline-cell{min-height:29px!important}.analysis-mainline-cell .analysis-tree-move{min-height:29px!important;padding:2px 7px!important;font-size:14.5px!important}}
\n\n/* v15.1.144 — Opening/Variation Lab uses the full responsive viewport width. */
body.is-training-preview .workspace-panel[data-workspace-panel="study"]{
  width:100%!important;max-width:none!important;padding:0 clamp(5px,1vw,14px) 18px!important;box-sizing:border-box!important;
}

/* v15.1.158 — course ownership filters and personal-copy badges */
.course-library-filters{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}
.course-library-filters button{min-height:40px;padding:8px 15px;border:1px solid var(--border,#d5deea);border-radius:999px;background:var(--panel,#fff);color:var(--text,#172842);font-weight:800;cursor:pointer}
.course-library-filters button.is-active{border-color:#0b5fe7;background:#0b5fe7;color:#fff}
.standalone-course-cover{border:0;padding:0;cursor:pointer;text-align:inherit}
.course-card-badges{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:7px}
.course-card-status{display:inline-flex;align-items:center;min-height:25px;padding:3px 8px;border-radius:999px;font-size:.72rem;font-weight:850;letter-spacing:.02em}
.course-card-status.is-published{background:#dcfce7;color:#166534}.course-card-status.is-private{background:#fff3cd;color:#805b00}.course-card-status.is-copy{background:#e8eef8;color:#42536e}
.is-restricted-course-copy [data-founder-only]{display:none!important}
html[data-theme="dark"] .course-library-filters button{background:#172033;color:#e7edf6;border-color:#35445b}
html[data-theme="dark"] .course-library-filters button.is-active{background:#2f6fed;border-color:#2f6fed;color:#fff}
html[data-theme="dark"] .course-card-status.is-published{background:#123d27;color:#b7f4cd}html[data-theme="dark"] .course-card-status.is-private{background:#4c3c12;color:#ffe69b}html[data-theme="dark"] .course-card-status.is-copy{background:#253148;color:#ced9eb}


/* v15.1.217 · analysis database source selector + Top-50 list */
.analysis-db-source-row{padding:8px 0 4px}
.analysis-db-source-row label{display:grid;gap:4px;font-size:.76rem;font-weight:750;color:#53627a}
.analysis-db-source-row select{width:100%;min-height:34px;border:1px solid #cfd9e7;border-radius:8px;background:#fff;color:#15223a;padding:5px 8px;font:inherit}
.analysis-db-topgames-50{margin-top:12px}
.analysis-db-topgames-scroll{display:grid;gap:3px;max-height:760px;overflow:auto;padding-right:2px;scrollbar-width:thin}
html[data-theme="dark"] .analysis-db-source-row label{color:#aebbd0}
html[data-theme="dark"] .analysis-db-source-row select{background:#172334;color:#e8eef8;border-color:#3a475a}