:root {
  --bg: #071b15;
  --bg-elevated: #0d2a22;
  --bg-panel: rgba(12, 36, 29, 0.92);
  --bg-card: rgba(16, 45, 36, 0.96);
  --bg-card-hover: rgba(20, 57, 46, 0.98);
  --bg-muted: #15382e;
  --text: #f5f1df;
  --text-soft: #c6c0a9;
  --text-muted: #8ea190;
  --border: rgba(214, 176, 74, 0.18);
  --border-strong: rgba(214, 176, 74, 0.38);
  --gold: #d6b04a;
  --gold-soft: #f0d88a;
  --green: #27ae60;
  --red: #c0392b;
  --orange: #e67e22;
  --blue: #2980b9;
  --grey: #2c3e50;
  --white: #ffffff;
  --shadow-lg: 0 24px 60px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 14px 32px rgba(0, 0, 0, 0.28);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --tap: 44px;
  --content-width: 1180px;
  --header-height: 88px;
  --transition: 180ms ease;
  --felt-pattern: radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.02), transparent 30%),
    radial-gradient(circle at 80% 10%, rgba(255, 255, 255, 0.02), transparent 24%),
    radial-gradient(circle at 50% 100%, rgba(0, 0, 0, 0.16), transparent 35%),
    linear-gradient(180deg, #0c342a 0%, #071b15 100%);
}
* { box-sizing: border-box; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body { margin: 0; min-height: 100vh; font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--text); background: var(--felt-pattern); background-attachment: fixed; }
body.modal-open { overflow: hidden; }
img,picture,video,canvas,svg { display: block; max-width: 100%; }
button,input,select,textarea { font: inherit; }
button { cursor: pointer; }
button:disabled { cursor: not-allowed; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; color: var(--gold-soft); }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.app-shell { min-height: 100vh; padding: env(safe-area-inset-top, 0) 16px env(safe-area-inset-bottom, 0); }
.app-header { max-width: var(--content-width); margin: 0 auto; min-height: var(--header-height); display: flex; flex-direction: column; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 20px 0 12px; }
.eyebrow,.section-kicker,.mini-label { margin: 0; font-size: 0.75rem; line-height: 1.2; letter-spacing: 0.14em; text-transform: uppercase; color: var(--gold-soft); }
.app-header h1,.screen-header h2,.card-header h3,.dashboard-panel h2,.reference-panel h2 { margin: 0; line-height: 1.1; }
.app-header h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); font-weight: 800; }
.app-subtitle,.section-subtitle,.position-subtitle,.position-status-text,.position-best-score,.feedback-panel p,.result-card p,.calc-output p,.scenario-text,.quiz-question,.tool-form span,.info-banner,.locked-state p { color: var(--text-soft); }
.app-subtitle,.section-subtitle,.position-subtitle,.position-status-text,.position-best-score,.feedback-panel p,.result-card p,.calc-output p,.info-banner,.locked-state p,.strategy-table td,.strategy-table th,.rule-list li,.subsection-header p { line-height: 1.5; }
.app-main { max-width: var(--content-width); margin: 0 auto; padding: 4px 0 24px; }
.screen { display: none; }
.screen.active { display: block; }
.panel { background: var(--bg-panel); border: 1px solid var(--border); box-shadow: var(--shadow-lg); border-radius: var(--radius-xl); backdrop-filter: blur(12px); }
.centered-panel { min-height: 320px; display: grid; place-items: center; padding: 28px; text-align: center; }
.dashboard-panel,.position-panel,.reference-panel { padding: 18px; }
.dashboard-topbar,.screen-header,.card-header,.subsection-header,.quiz-header,.scenario-header { display: flex; flex-direction: column; align-items: stretch; justify-content: space-between; gap: 12px; }
.sticky-header { position: sticky; top: 0; z-index: 20; padding: 4px 0 14px; margin-bottom: 10px; background: linear-gradient(180deg, rgba(13, 42, 34, 0.98) 0%, rgba(13, 42, 34, 0.92) 78%, rgba(13, 42, 34, 0) 100%); backdrop-filter: blur(12px); }
.progress-chip,.ghost-btn,.back-btn,.primary-btn,.tab-btn,.answer-btn,.position-card,.modal-close-btn,.tool-form input,.tool-form select { min-height: var(--tap); }
.progress-chip { display: inline-flex; align-items: center; justify-content: center; padding: 0 14px; border-radius: 999px; background: rgba(214, 176, 74, 0.12); border: 1px solid rgba(214, 176, 74, 0.24); color: var(--gold-soft); font-weight: 700; white-space: normal; text-align: center; max-width: 100%; }
.ghost-btn,.back-btn,.primary-btn,.tab-btn,.answer-btn,.modal-close-btn,.position-card,#reference-card { border: 1px solid transparent; border-radius: var(--radius-md); transition: transform var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), color var(--transition); }
.ghost-btn,.back-btn,.tab-btn,.modal-close-btn { background: rgba(255, 255, 255, 0.04); color: var(--text); }
.ghost-btn,.back-btn,.primary-btn,.tab-btn,.modal-close-btn { padding: 10px 14px; }
.primary-btn { background: linear-gradient(180deg, #e0bf68 0%, #b98b26 100%); color: #1b1302; font-weight: 800; box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2); }
.primary-btn:hover,.primary-btn:focus-visible { transform: translateY(-1px); box-shadow: 0 14px 28px rgba(0, 0, 0, 0.26); }
.ghost-btn:hover,.ghost-btn:focus-visible,.back-btn:hover,.back-btn:focus-visible,.tab-btn:hover,.tab-btn:focus-visible,.modal-close-btn:hover,.modal-close-btn:focus-visible { background: rgba(255, 255, 255, 0.08); border-color: var(--border-strong); }
button:focus-visible,input:focus-visible,select:focus-visible { outline: 3px solid rgba(214, 176, 74, 0.34); outline-offset: 2px; }
.app-header > *, .dashboard-topbar > *, .screen-header > *, .card-header > *, .subsection-header > *, .quiz-header > *, .scenario-header > *, .drill-header > *, .range-layout > *, .scenario-layout > *, .cards-showcase > *, .cheatsheet-layout > *, .reference-tables > * { min-width: 0; }
.screen-header-copy { min-width: 0; }
.position-cards { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 14px; }
.position-card,#reference-card { width: 100%; padding: 16px; background: linear-gradient(180deg, rgba(17, 47, 38, 0.98) 0%, rgba(12, 33, 27, 0.98) 100%); border: 1px solid var(--border); box-shadow: var(--shadow-md); text-align: left; color: var(--text); }
.position-card:hover,.position-card:focus-visible,#reference-card:hover,#reference-card:focus-visible { transform: translateY(-2px); background: linear-gradient(180deg, rgba(23, 61, 49, 1) 0%, rgba(15, 39, 32, 1) 100%); border-color: var(--border-strong); }
.position-card.locked,#reference-card.locked { opacity: 0.7; background: linear-gradient(180deg, rgba(33, 38, 43, 0.92) 0%, rgba(24, 29, 34, 0.94) 100%); border-color: rgba(255, 255, 255, 0.08); }
.position-card.locked:hover,.position-card.locked:focus-visible,#reference-card.locked:hover,#reference-card.locked:focus-visible { transform: none; }
.position-card.available { border-color: rgba(214, 176, 74, 0.45); box-shadow: 0 0 0 1px rgba(214, 176, 74, 0.15), var(--shadow-md); }
.position-card.mastered { border-color: rgba(39, 174, 96, 0.4); box-shadow: 0 0 0 1px rgba(39, 174, 96, 0.14), var(--shadow-md); }
.position-card-top { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 6px; }
.position-name { font-size: 1.15rem; font-weight: 800; letter-spacing: 0.01em; }
.status-icon { font-size: 1.2rem; }
.position-subtitle,.position-status-text,.position-best-score { display: block; }
.position-status-text,.position-best-score { margin-top: 8px; }
.position-best-score { font-size: 0.92rem; }
.reference-card-section { margin-top: 16px; }
.fundamentals-card-section { margin-top: 16px; }
.cheatsheet-card-section { margin-top: 16px; }
.dashboard-warning { margin-top: 16px; }
.tab-bar { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-bottom: 14px; }
.tab-btn { width: 100%; padding: 12px; font-weight: 700; color: var(--text-soft); background: rgba(255, 255, 255, 0.04); border-color: rgba(255, 255, 255, 0.06); }
.tab-btn.active { background: rgba(214, 176, 74, 0.16); border-color: rgba(214, 176, 74, 0.4); color: var(--gold-soft); }
.tab-btn.locked { opacity: 0.7; }
.tab-panels { display: grid; }
.tab-panel { display: none; }
.tab-panel.active { display: block; }
.content-card { padding: 16px; border-radius: var(--radius-lg); border: 1px solid var(--border); background: linear-gradient(180deg, rgba(15, 42, 34, 0.98) 0%, rgba(10, 28, 22, 0.98) 100%); box-shadow: var(--shadow-md); }
.info-banner { margin: 14px 0 12px; padding: 12px 14px; border-radius: var(--radius-md); background: rgba(214, 176, 74, 0.08); border: 1px solid rgba(214, 176, 74, 0.2); }
.info-banner strong { color: var(--gold-soft); }
.range-layout { display: grid; gap: 14px; }
.grid-legend { display: grid; grid-template-columns: 1fr; gap: 10px; }
.legend-item { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: var(--radius-md); background: rgba(255, 255, 255, 0.03); border: 1px solid rgba(255, 255, 255, 0.05); }
.legend-swatch { width: 14px; height: 14px; border-radius: 4px; flex: 0 0 14px; }
.legend-label { font-size: 0.92rem; color: var(--text-soft); }
.hand-grid-wrap { width: 100%; overflow: hidden; border-radius: var(--radius-lg); border: 1px solid rgba(255, 255, 255, 0.06); background: rgba(0, 0, 0, 0.14); padding: 8px; }
.hand-grid { display: grid; grid-template-columns: repeat(13, minmax(0, 1fr)); gap: 4px; }
.hand-cell { aspect-ratio: 1 / 1; width: 100%; min-width: 0; display: grid; place-items: center; padding: 2px; border-radius: 8px; border: 1px solid rgba(255, 255, 255, 0.06); color: var(--white); font-size: clamp(0.43rem, 1.65vw, 0.75rem); font-weight: 800; letter-spacing: -0.02em; text-align: center; line-height: 1.05; }
.hand-cell:hover,.hand-cell:focus-visible { transform: scale(1.04); box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.08); }
.tier-premium,.tier-3bet { background: #c0392b; }
.tier-strong { background: #e67e22; }
.tier-playable,.tier-call { background: #27ae60; }
.tier-bottom { background: #2980b9; }
.tier-fold { background: #2c3e50; }
.table-wrap { width: 100%; overflow-x: auto; border-radius: var(--radius-md); border: 1px solid rgba(255, 255, 255, 0.06); }
.strategy-table { width: 100%; min-width: 480px; border-collapse: collapse; background: rgba(255, 255, 255, 0.02); table-layout: fixed; }
.strategy-table th,.strategy-table td { padding: 12px 14px; text-align: left; border-bottom: 1px solid rgba(255, 255, 255, 0.06); vertical-align: top; overflow-wrap: anywhere; word-break: break-word; }
.strategy-table thead th { color: var(--gold-soft); font-size: 0.84rem; letter-spacing: 0.08em; text-transform: uppercase; background: rgba(214, 176, 74, 0.06); }
.strategy-table tbody tr:last-child td { border-bottom: 0; }
.action-pill { display: inline-flex; align-items: center; min-height: 30px; padding: 4px 10px; border-radius: 999px; font-size: 0.85rem; font-weight: 800; letter-spacing: 0.03em; text-transform: uppercase; }
.action-4bet { background: rgba(192, 57, 43, 0.18); color: #ffaea5; }
.action-call { background: rgba(39, 174, 96, 0.16); color: #a6efc1; }
.action-fold { background: rgba(44, 62, 80, 0.34); color: #cad3dc; }
.subsection { margin-top: 18px; }
.subsection-header { margin-bottom: 12px; }
.scenario-layout { display: grid; gap: 18px; }
.cards-showcase { display: grid; grid-template-columns: 1fr; gap: 14px; }
.playing-cards { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 10px; }
.playing-card { width: 58px; height: 80px; padding: 8px; border-radius: 12px; background: linear-gradient(180deg, #fffdf8 0%, #f2ead6 100%); border: 1px solid rgba(0, 0, 0, 0.12); box-shadow: 0 10px 20px rgba(0, 0, 0, 0.18); display: flex; flex-direction: column; justify-content: space-between; color: #1d1d1d; }
.playing-card.red { color: #c0392b; }
.card-rank { font-weight: 800; font-size: 1.1rem; }
.card-suit { align-self: flex-end; font-size: 1.25rem; }
.scenario-text,.quiz-question { margin: 0; font-size: 1rem; }
.answer-grid { display: grid; grid-template-columns: 1fr; gap: 10px; margin-top: 16px; }
.answer-btn { width: 100%; padding: 12px 14px; text-align: left; background: rgba(255, 255, 255, 0.04); border-color: rgba(255, 255, 255, 0.08); color: var(--text); font-weight: 600; }
.answer-btn:hover,.answer-btn:focus-visible { background: rgba(255, 255, 255, 0.08); }
.answer-btn.correct,.answer-btn.correct:hover,.answer-btn.correct:focus-visible { background: rgba(39, 174, 96, 0.16); border-color: rgba(39, 174, 96, 0.48); color: #b9f3cd; }
.answer-btn.wrong,.answer-btn.wrong:hover,.answer-btn.wrong:focus-visible { background: rgba(192, 57, 43, 0.18); border-color: rgba(192, 57, 43, 0.48); color: #ffb5ae; }
.answer-btn.dimmed { opacity: 0.72; }
.feedback-panel,.result-card,.calc-output,.locked-state { margin-top: 16px; padding: 14px; border-radius: var(--radius-md); background: rgba(255, 255, 255, 0.04); border: 1px solid rgba(255, 255, 255, 0.06); }
.feedback-panel.correct { border-color: rgba(39, 174, 96, 0.4); background: rgba(39, 174, 96, 0.08); }
.feedback-panel.wrong { border-color: rgba(192, 57, 43, 0.4); background: rgba(192, 57, 43, 0.08); }
.feedback-panel h4,.result-card h4,.locked-state h4,.locked-state h3 { margin: 0 0 8px; }
.locked-state { text-align: center; }
.lock-emoji { font-size: 2rem; margin-bottom: 10px; }
.rule-list { display: grid; gap: 10px; padding-left: 20px; margin: 0; }
.rule-list li::marker { color: var(--gold-soft); }
.result-score { font-size: 1.1rem; font-weight: 800; color: var(--gold-soft); }
.result-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.reference-tool + .reference-tool { margin-top: 16px; }
.cheatsheet-layout { display: grid; gap: 16px; margin-top: 16px; }
.cheatsheet-position-picker { display: grid; grid-template-columns: 1fr; gap: 10px; }
.cheatsheet-position-btn {
  min-height: var(--tap);
  padding: 12px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-soft);
  font-weight: 700;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}
.cheatsheet-position-btn:hover,
.cheatsheet-position-btn:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-strong);
}
.cheatsheet-position-btn.active {
  background: rgba(214, 176, 74, 0.16);
  border-color: rgba(214, 176, 74, 0.4);
  color: var(--gold-soft);
}
.cheatsheet-summary-grid { display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 14px; }
.cheatsheet-summary-card {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.cheatsheet-summary-card .mini-label { margin-bottom: 4px; }
.cheatsheet-summary-hands {
  margin: 0;
  color: var(--gold-soft);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.45;
  overflow-wrap: anywhere;
}
.cheatsheet-range-layout { align-items: start; }
.tool-form { display: grid; grid-template-columns: 1fr; gap: 12px; }
.tool-form label { display: grid; gap: 8px; }
.tool-form input,.tool-form select { width: 100%; padding: 10px 12px; border-radius: var(--radius-md); border: 1px solid rgba(255, 255, 255, 0.12); background: rgba(0, 0, 0, 0.18); color: var(--text); }
.tool-form input::placeholder { color: var(--text-muted); }
.calc-output { display: grid; gap: 8px; }
.calc-output p { margin: 0; }
.calc-output strong { color: var(--gold-soft); }
.reference-tables { display: grid; gap: 16px; }
.reference-tables h4 { margin: 0; padding: 12px 14px; color: var(--gold-soft); }
.modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 16px; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(3, 8, 6, 0.72); backdrop-filter: blur(6px); }
.modal-dialog { position: relative; width: min(100%, 420px); padding: 24px 20px 20px; border-radius: var(--radius-xl); border: 1px solid var(--border-strong); background: linear-gradient(180deg, rgba(17, 48, 39, 0.98) 0%, rgba(10, 26, 21, 0.98) 100%); box-shadow: var(--shadow-lg); }
.modal-close-btn { position: absolute; top: 10px; right: 10px; width: 44px; height: 44px; padding: 0; display: grid; place-items: center; font-size: 1.6rem; }
.detail-tier,.detail-action { margin: 10px 0 0; }
.detail-tier { display: inline-flex; align-items: center; min-height: 34px; padding: 6px 10px; border-radius: 999px; background: rgba(214, 176, 74, 0.12); color: var(--gold-soft); font-weight: 700; }
.loading-text { font-size: 1.1rem; color: var(--gold-soft); }
[hidden] { display: none !important; }
@media (min-width: 640px) {
  .app-shell { padding-left: 20px; padding-right: 20px; }
  .dashboard-panel,.position-panel,.reference-panel { padding: 22px; }
  .app-header { flex-direction: row; align-items: center; }
  .dashboard-topbar,.screen-header,.card-header,.subsection-header,.quiz-header,.scenario-header { flex-direction: row; align-items: flex-start; }
  .position-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tab-bar { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .grid-legend { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cards-showcase { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .answer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .tool-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cheatsheet-position-picker { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .cheatsheet-summary-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (min-width: 900px) {
  .dashboard-panel,.position-panel,.reference-panel { padding: 26px; }
  .position-cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .range-layout { grid-template-columns: 230px minmax(0, 1fr); align-items: start; }
  .grid-legend { grid-template-columns: 1fr; position: sticky; top: 102px; }
  .scenario-layout { grid-template-columns: 280px minmax(0, 1fr); align-items: start; }
  .reference-tables { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cheatsheet-layout { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .cheatsheet-range-card { grid-column: 1 / -1; }
  .cheatsheet-position-picker { grid-template-columns: repeat(6, minmax(0, 1fr)); }
  .cheatsheet-summary-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 420px) {
  .hand-grid { gap: 3px; }
  .hand-cell { font-size: clamp(0.39rem, 1.55vw, 0.64rem); border-radius: 7px; }
  .playing-card { width: 52px; height: 74px; }
  .strategy-table { min-width: 100%; }
  .strategy-table th,.strategy-table td { padding: 10px; font-size: 0.92rem; }
  .strategy-table thead th { font-size: 0.75rem; }
}
@media (prefers-reduced-motion: reduce) {
  *,*::before,*::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}


.postflop-tabs {
  display: flex;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.subtab-btn {
  min-height: var(--tap);
  padding: 10px 14px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-soft);
  font-weight: 700;
  transition: transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
}

.subtab-btn:hover,
.subtab-btn:focus-visible {
  background: rgba(255, 255, 255, 0.08);
  border-color: var(--border-strong);
}

.subtab-btn.active {
  background: rgba(214, 176, 74, 0.16);
  border-color: rgba(214, 176, 74, 0.4);
  color: var(--gold-soft);
}

.subtab-panel {
  display: none;
}

.subtab-panel.active {
  display: block;
}

.drill-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}

.drill-layout {
  align-items: start;
}

.drill-metrics-card {
  padding: 14px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.metric-value {
  margin: 6px 0 12px;
  color: var(--gold-soft);
  font-weight: 800;
  font-size: 1.05rem;
}

.calc-breakdown {
  display: grid;
  gap: 8px;
  margin-bottom: 10px;
}

.calc-breakdown p {
  margin: 0;
}

.display-note {
  margin: 10px 0 0;
  color: var(--gold-soft);
  font-size: 0.92rem;
}

.detail-list {
  display: grid;
  gap: 8px;
  margin-top: 12px;
}

.detail-list p {
  margin: 0;
}

.calc-breakdown strong {
  color: var(--gold-soft);
}

#scenarios-unlocked-state[hidden],
#postflop-unlocked-state[hidden],
#postflop-rules-view[hidden],
#postflop-drills-view[hidden] {
  display: none !important;
}

@media (max-width: 420px) {
  .drill-header {
    flex-direction: column;
    align-items: stretch;
  }
}