/* ==========================================================================
   📐 삼각형의 비밀: 합동 판정 작전! (Triangle Congruence Ops)
   HaloMath Arcade Custom CSS - Dark Geometric Glassmorphism Design
   ========================================================================== */

:root {
  --bg-dark: #0b0f19;
  --panel-bg: rgba(30, 41, 59, 0.75);
  --panel-border: rgba(255, 255, 255, 0.12);
  
  --primary-cyan: #06b6d4;
  --cyan-glow: rgba(6, 182, 212, 0.4);
  --accent-purple: #8b5cf6;
  --accent-pink: #ec4899;
  --gold-star: #f59e0b;
  --gold-glow: rgba(245, 158, 11, 0.4);
  --danger-red: #ef4444;
  --success-green: #10b981;
  
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  
  --font-heading: 'Jua', sans-serif;
  --font-digit: 'Outfit', sans-serif;
  --font-body: 'Pretendard', -apple-system, BlinkMacSystemFont, system-ui, Roboto, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  user-select: none;
  -webkit-user-select: none;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  background-color: var(--bg-dark);
  background-image: 
    radial-gradient(circle at 20% 20%, rgba(6, 182, 212, 0.12) 0%, transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.12) 0%, transparent 40%),
    linear-gradient(to bottom, #070a12, #0d1322);
  color: var(--text-main);
  font-family: var(--font-body);
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  overflow-x: hidden;
  touch-action: manipulation;
}

.game-container {
  width: 100%;
  max-width: 1000px;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  padding: 12px 16px;
  padding-left: max(12px, env(safe-area-inset-left));
  padding-right: max(12px, env(safe-area-inset-right));
  padding-bottom: max(12px, env(safe-area-inset-bottom));
  gap: 12px;
}

/* Desktop: full labels / Mobile: short labels */
.label-short { display: none; }
.label-full { display: inline; }

/* ----------------------------------------------------
   Header & Nav Bar
   ---------------------------------------------------- */
.game-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 10px 18px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 14px;
}

.btn-icon-nav {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-main);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.2s ease;
}

.btn-icon-nav:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.game-title-group {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.game-title-group h1 {
  font-family: var(--font-heading);
  font-size: 1.35rem;
  color: #06b6d4;
  letter-spacing: -0.5px;
}

.game-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.channel-badge {
  background: linear-gradient(135deg, var(--primary-cyan), var(--accent-purple));
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  box-shadow: 0 0 10px var(--cyan-glow);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* Header Stat Badges (Reference Image Style) */
.header-stat-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.6);
  border: 1.5px solid rgba(6, 182, 212, 0.3);
  border-radius: 12px;
  padding: 4px 12px;
  min-width: 68px;
  line-height: 1.15;
}

.stat-badge-label {
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--text-muted);
}

.stat-badge-val {
  font-family: var(--font-digit);
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--text-main);
}

.btn-sound {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  border-radius: 50%;
  width: 36px;
  height: 36px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.2s ease;
}

.btn-sound:hover {
  background: rgba(255, 255, 255, 0.2);
}

.user-profile-card {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(15, 23, 42, 0.6);
  padding: 5px 12px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.profile-avatar {
  font-size: 1.1rem;
}

.profile-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.profile-name {
  font-weight: 700;
  font-size: 0.85rem;
}

.profile-id {
  font-size: 0.7rem;
  color: var(--text-muted);
}

.btn-small-edit {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.8rem;
  opacity: 0.7;
}

.btn-small-edit:hover {
  opacity: 1.0;
}

/* ----------------------------------------------------
   Status HUD Bar
   ---------------------------------------------------- */
.status-hud-bar {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  padding: 10px 16px;
}

.hud-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(15, 23, 42, 0.5);
  border-radius: 10px;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.hud-label {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-muted);
  letter-spacing: 0.5px;
}

.hud-value {
  font-family: var(--font-digit);
  font-size: 1.3rem;
  font-weight: 800;
}

.highlight-cyan {
  color: var(--primary-cyan);
  text-shadow: 0 0 10px var(--cyan-glow);
}

.highlight-gold {
  color: var(--gold-star);
  text-shadow: 0 0 10px var(--gold-glow);
}

.timer-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.timer-bar-container {
  flex: 1;
  height: 12px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  overflow: hidden;
}

.timer-bar-fill {
  height: 100%;
  width: 100%;
  background: linear-gradient(90deg, var(--primary-cyan), var(--gold-star));
  transition: width 0.3s linear, background 0.3s ease;
}

.timer-bar-fill.warning {
  background: linear-gradient(90deg, var(--gold-star), var(--danger-red));
}

.timer-text {
  min-width: 45px;
  text-align: right;
  font-size: 1.1rem;
}

/* ----------------------------------------------------
   Canvas Stage Area
   ---------------------------------------------------- */
.canvas-section {
  width: 100%;
}

.canvas-wrapper {
  position: relative;
  width: 100%;
  background: #060913;
  border: 1.5px solid rgba(6, 182, 212, 0.3);
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), inset 0 0 30px rgba(6, 182, 212, 0.05);
}

.game-container.is-stack-layout .canvas-wrapper {
  /* room for clues overlay under lower triangle */
  padding-bottom: 0;
}

#geometry-canvas {
  width: 100%;
  height: auto;
  aspect-ratio: 900 / 420;
  display: block;
  cursor: crosshair;
  touch-action: none;
  max-height: min(48vh, 420px);
}

.game-container.is-stack-layout #geometry-canvas {
  aspect-ratio: 420 / 720;
  max-height: min(62vh, 720px);
}

.canvas-tool-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

/* Tool Palette */
.floating-tool-palette {
  position: static;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--panel-bg);
  backdrop-filter: blur(8px);
  border: 1px solid var(--panel-border);
  padding: 6px 14px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.tool-guide-text {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
}

.tool-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #fff;
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

.tool-btn.active {
  background: linear-gradient(135deg, var(--primary-cyan), #0284c7);
  border-color: var(--primary-cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
}

.btn-danger-soft {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: #fca5a5;
}

.btn-danger-soft:hover {
  background: rgba(239, 68, 68, 0.3);
}

/* Clues Panel */
.clues-panel {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  background: rgba(15, 23, 42, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 8px 14px;
}

.clues-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.clue-efficiency-tag {
  background: rgba(16, 185, 129, 0.2);
  border: 1px solid rgba(16, 185, 129, 0.4);
  color: #6ee7b7;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.75rem;
}

.clue-efficiency-tag.warning {
  background: rgba(245, 158, 11, 0.2);
  border-color: rgba(245, 158, 11, 0.4);
  color: #fcd34d;
}

.clues-tags-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 28px;
  align-items: center;
}

.clue-empty-msg {
  font-size: 0.8rem;
  color: #64748b;
  font-style: italic;
}

.clue-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(6, 182, 212, 0.15);
  border: 1px solid rgba(6, 182, 212, 0.4);
  color: #a5f3fc;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 6px;
}

.clue-tag.angle-tag {
  background: rgba(139, 92, 246, 0.15);
  border-color: rgba(139, 92, 246, 0.4);
  color: #ddd6fe;
}

.clue-tag.inefficient-pulse {
  animation: redPulseWaste 0.8s ease-in-out infinite alternate !important;
}

.clue-tag.bonus-tag {
  background: rgba(245, 158, 11, 0.15);
  border-color: rgba(245, 158, 11, 0.5);
  color: var(--gold-star);
  box-shadow: 0 0 6px var(--gold-glow);
}

@keyframes redPulseWaste {
  0% {
    background: rgba(239, 68, 68, 0.25) !important;
    border-color: rgba(239, 68, 68, 0.7) !important;
    color: #fca5a5 !important;
    box-shadow: 0 0 4px rgba(239, 68, 68, 0.4);
    transform: scale(1.0);
  }
  100% {
    background: rgba(239, 68, 68, 0.6) !important;
    border-color: #ef4444 !important;
    color: #ffffff !important;
    box-shadow: 0 0 14px rgba(239, 68, 68, 0.9);
    transform: scale(1.06);
  }
}

/* ----------------------------------------------------
   Decision Submission Panel
   ---------------------------------------------------- */
.decision-section {
  width: 100%;
}

.decision-container {
  background: var(--panel-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 16px 20px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.decision-title {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: #fff;
  text-align: center;
}

.condition-options {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  margin-bottom: 14px;
}

.condition-options.simplified-options {
  grid-template-columns: repeat(2, 1fr);
}

.condition-card {
  position: relative;
  cursor: pointer;
}

.condition-card input[type="radio"] {
  position: absolute;
  opacity: 0;
}

.card-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  background: rgba(15, 23, 42, 0.6);
  border: 1.5px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 12px 8px;
  transition: all 0.2s ease;
  height: 100%;
  text-align: center;
}

.condition-card:hover .card-content {
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-2px);
}

.condition-card input[type="radio"]:checked + .card-content {
  background: rgba(6, 182, 212, 0.15);
  border-color: var(--primary-cyan);
  box-shadow: 0 0 16px var(--cyan-glow);
}

.cond-badge {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  padding: 4px 10px;
  border-radius: 8px;
}

.badge-sss { background: #0284c7; color: #fff; }
.badge-sas { background: #7c3aed; color: #fff; }
.badge-asa { background: #db2777; color: #fff; }
.badge-none { background: #475569; color: #fff; }

.decision-section {
  width: 100%;
  display: flex;
  justify-content: center;
  margin-top: 4px;
}

.decision-buttons {
  width: 100%;
  max-width: 900px;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.btn-sss { background: linear-gradient(135deg, #0284c7, #0369a1); box-shadow: 0 4px 15px rgba(2, 132, 199, 0.4); }
.btn-sas { background: linear-gradient(135deg, #7c3aed, #5b21b6); box-shadow: 0 4px 15px rgba(124, 58, 237, 0.4); }
.btn-asa { background: linear-gradient(135deg, #db2777, #be185d); box-shadow: 0 4px 15px rgba(219, 39, 119, 0.4); }

.btn-sss:hover { box-shadow: 0 6px 20px rgba(2, 132, 199, 0.6); }
.btn-sas:hover { box-shadow: 0 6px 20px rgba(124, 58, 237, 0.6); }
.btn-asa:hover { box-shadow: 0 6px 20px rgba(219, 39, 119, 0.6); }

.btn-submit-action {
  flex: 1;
  width: auto;
  min-width: 0;
  border: none;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.2rem;
  padding: 12px 10px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn-submit-action:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 26px rgba(6, 182, 212, 0.65);
}

.btn-submit-action:active {
  transform: translateY(0) scale(1.0);
}

.btn-submit-action:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
  box-shadow: none !important;
  transform: none !important;
  filter: grayscale(0.4);
}

/* ----------------------------------------------------
   Modals & Overlays
   ---------------------------------------------------- */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(8px);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  padding: 16px;
  opacity: 1;
  transition: opacity 0.25s ease;
}

.modal-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
  display: none !important;
}

.hidden {
  display: none !important;
}

#result-modal.modal-backdrop {
  background: transparent;
  backdrop-filter: none;
  justify-content: center;
  align-items: flex-end;
  padding: 10px;
  padding-bottom: 16px;
  /* Block clicks to submit buttons underneath; card stays interactive */
  pointer-events: auto;
}

#result-modal .modal-card {
  pointer-events: auto;
  background: rgba(15, 23, 42, 0.95);
  backdrop-filter: blur(12px);
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.85);
  width: 100%;
  max-width: 580px;
  margin: 0 auto;
  padding: 16px 20px;
}

/* Hide submit stack / clues while overlap anim or result sheet is open */
.game-container.is-animating .decision-section,
.game-container.modal-open .decision-section,
body.modal-open .decision-section {
  visibility: hidden;
  pointer-events: none;
  height: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
}

.game-container.is-animating .clues-panel,
.game-container.modal-open .clues-panel {
  opacity: 0;
  pointer-events: none;
}

.game-container.is-animating .floating-tool-palette,
.game-container.modal-open .floating-tool-palette {
  opacity: 0.35;
  pointer-events: none;
}

.modal-card {
  background: #0f172a;
  border: 1.5px solid rgba(255, 255, 255, 0.15);
  border-radius: 20px;
  width: 100%;
  max-width: 520px;
  padding: 24px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
  animation: modalSlideUp 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes modalSlideUp {
  from { transform: translateY(30px) scale(0.95); opacity: 0; }
  to { transform: translateY(0) scale(1.0); opacity: 1; }
}

/* Result Card specifics */
.result-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.result-icon {
  font-size: 2rem;
}

.result-header h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
}

.result-score-badge {
  display: inline-block;
  font-family: var(--font-digit);
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--gold-star);
  text-shadow: 0 0 12px var(--gold-glow);
  margin-bottom: 8px;
}

.result-subtitle {
  font-size: 0.95rem;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 14px;
}

/* Counter Example Debugger Box */
.counter-example-box {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.3);
  border-radius: 12px;
  padding: 12px;
  margin-bottom: 14px;
}

.ce-box-title {
  color: #fca5a5;
  font-size: 0.9rem;
  margin-bottom: 6px;
}

.ce-explanation-text {
  font-size: 0.82rem;
  color: #fecaca;
  line-height: 1.4;
  margin-bottom: 8px;
}

.ce-canvas-wrapper {
  width: 100%;
  background: #070a12;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

#ce-canvas {
  width: 100%;
  height: 160px;
  display: block;
}

/* Math Note Box */
.math-note-box {
  background: rgba(6, 182, 212, 0.1);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: #a5f3fc;
  margin-bottom: 10px;
  line-height: 1.4;
}

/* Classroom Discussion View Toggle Bar */
.view-toggle-container {
  background: rgba(15, 23, 42, 0.7);
  border: 1px solid rgba(6, 182, 212, 0.35);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.view-toggle-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-cyan);
}

.view-toggle-buttons {
  display: flex;
  gap: 8px;
}

.btn-view-toggle {
  flex: 1;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 6px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-view-toggle:hover {
  background: rgba(255, 255, 255, 0.16);
  color: #fff;
}

.btn-view-toggle.active {
  background: linear-gradient(135deg, #0284c7, #06b6d4);
  border-color: #06b6d4;
  color: #fff;
  box-shadow: 0 0 12px rgba(6, 182, 212, 0.4);
}

.btn-modal-action {
  width: 100%;
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
  border: none;
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  padding: 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-modal-action:hover {
  transform: translateY(-2px);
}

/* Game Over Card */
.gameover-card {
  text-align: center;
}

.trophy-anim {
  font-size: 3.5rem;
  display: block;
  margin-bottom: 8px;
  animation: floatBounce 2s infinite ease-in-out;
}

@keyframes floatBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.final-score-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 16px 0;
}

.score-circle {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.2) 0%, rgba(15, 23, 42, 0.9) 70%);
  border: 3px solid var(--gold-star);
  box-shadow: 0 0 24px var(--gold-glow);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  margin-bottom: 16px;
}

.score-num {
  font-family: var(--font-digit);
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--gold-star);
  line-height: 1;
}

.score-unit {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.round-scores-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  width: 100%;
}

.round-score-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 8px 2px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.round-score-item.perfect-card {
  background: rgba(245, 158, 11, 0.12);
  border-color: rgba(245, 158, 11, 0.4);
}

.round-score-item.success-card {
  background: rgba(16, 185, 129, 0.12);
  border-color: rgba(16, 185, 129, 0.4);
}

.round-score-item.fail-card {
  background: rgba(239, 68, 68, 0.1);
  border-color: rgba(239, 68, 68, 0.3);
}

.round-item-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-bottom: 2px;
}

.round-item-score {
  font-family: var(--font-digit);
  font-size: 0.92rem;
  font-weight: 700;
  color: #fff;
}

.perfect-card .round-item-score {
  color: var(--gold-star);
}

.success-card .round-item-score {
  color: #34d399;
}

.fail-card .round-item-score {
  color: #f87171;
}

.highscore-banner {
  background: linear-gradient(135deg, #ec4899, #8b5cf6);
  color: #fff;
  font-family: var(--font-heading);
  font-size: 1rem;
  padding: 8px;
  border-radius: 10px;
  margin-bottom: 14px;
}

.gameover-actions {
  display: flex;
  gap: 10px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-cyan), #0284c7);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Profile Modal Specifics */
.profile-card h2 {
  font-family: var(--font-heading);
  margin-bottom: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
  text-align: left;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-muted);
}

.form-group input {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 10px 12px;
  border-radius: 10px;
  font-size: 0.95rem;
}

.form-group input:focus {
  outline: none;
  border-color: var(--primary-cyan);
  box-shadow: 0 0 10px var(--cyan-glow);
}

.profile-lead {
  margin: 0 0 12px;
  font-size: 0.88rem;
  font-weight: 600;
  color: #94a3b8;
  text-align: center;
}

.profile-err {
  margin: 8px 0 0;
  min-height: 1.2em;
  font-size: 0.82rem;
  font-weight: 700;
  color: #fda4af;
}

/* Header Leaderboard Button */
.btn-leaderboard {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.2), rgba(217, 119, 6, 0.3));
  border: 1px solid var(--gold-star);
  color: var(--gold-star);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  padding: 6px 12px;
  border-radius: 20px;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.2);
}

.btn-leaderboard:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.35), rgba(217, 119, 6, 0.5));
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.5);
}

/* Leaderboard Modal & Table */
.leaderboard-card {
  max-width: 580px;
}

.modal-header-with-close {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-header-with-close h2 {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  color: var(--gold-star);
  margin: 0;
}

.btn-close-icon {
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  font-size: 1rem;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  cursor: pointer;
  transition: background 0.2s ease;
}

.btn-close-icon:hover {
  background: rgba(239, 68, 68, 0.6);
}

.leaderboard-section {
  width: 100%;
  margin: 16px 0;
}

.leaderboard-title {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  color: var(--gold-star);
  margin-bottom: 10px;
  text-align: left;
}

.leaderboard-table-wrapper {
  width: 100%;
  max-height: 260px;
  overflow-y: auto;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(15, 23, 42, 0.6);
}

.leaderboard-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.leaderboard-table th {
  background: rgba(30, 41, 59, 0.9);
  color: var(--text-muted);
  font-weight: 700;
  padding: 10px 12px;
  position: sticky;
  top: 0;
  z-index: 2;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.leaderboard-table td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  color: #e2e8f0;
}

.leaderboard-table tr:hover {
  background: rgba(255, 255, 255, 0.04);
}

.leaderboard-table .rank-1 { color: #f59e0b; font-weight: 800; }
.leaderboard-table .rank-2 { color: #94a3b8; font-weight: 800; }
.leaderboard-table .rank-3 { color: #b45309; font-weight: 800; }

.leaderboard-table tr.current-player-row {
  background: rgba(6, 182, 212, 0.2);
  border-left: 3px solid var(--primary-cyan);
}

/* Opening Screen Champion & Banner Styles */
.modal-card.modal-opening {
  max-width: 480px;
  padding: 20px;
}

.opening-banner {
  text-align: center;
  margin-bottom: 12px;
}

.opening-subtitle {
  font-size: 0.75rem;
  font-weight: 800;
  color: var(--gold-star);
  background: rgba(245, 158, 11, 0.15);
  padding: 3px 10px;
  border-radius: 12px;
  display: inline-block;
  margin-bottom: 4px;
}

.opening-banner h2 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: #fff;
  margin-bottom: 8px;
}

.champ-card {
  position: relative;
  width: 100%;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(217, 119, 6, 0.35));
  border: 1.5px solid var(--gold-star);
  border-radius: 14px;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 6px 20px rgba(245, 158, 11, 0.25);
  overflow: hidden;
  margin-bottom: 8px;
}

.champ-gold-shimmer {
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(
    45deg,
    transparent 0%,
    rgba(255, 255, 255, 0.2) 50%,
    transparent 100%
  );
  transform: rotate(30deg);
  animation: gold-sweep 3.5s infinite;
}

@keyframes gold-sweep {
  0% { transform: translateX(-100%) rotate(30deg); }
  100% { transform: translateX(100%) rotate(30deg); }
}

.champ-trophy {
  font-size: 2.2rem;
  z-index: 2;
}

.champ-info {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  z-index: 2;
}

.champ-name {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
}

.champ-id {
  font-size: 0.78rem;
  color: var(--gold-star);
  font-weight: 600;
}

.champ-score {
  font-family: var(--font-digit);
  font-size: 2rem;
  font-weight: 800;
  color: var(--gold-star);
  text-shadow: 0 0 10px var(--gold-glow);
  z-index: 2;
}

.btn-toggle-opening-leaderboard {
  background: transparent;
  border: 1px solid var(--gold-star);
  color: var(--gold-star);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 16px;
  cursor: pointer;
  transition: all 0.2s ease;
  width: 100%;
}

.btn-toggle-opening-leaderboard:hover {
  background: rgba(245, 158, 11, 0.2);
}

.opening-leaderboard-box {
  width: 100%;
  margin-top: 8px;
}

/* Game Purpose Banner */
.game-guide-box.short-banner {
  background: rgba(6, 182, 212, 0.12);
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 12px;
  padding: 8px 12px;
  text-align: center;
  margin-bottom: 12px;
}

.game-guide-box.short-banner .guide-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  color: var(--primary-cyan);
  margin-bottom: 2px;
}

.game-guide-box.short-banner .guide-desc {
  font-size: 0.8rem;
  color: #e2e8f0;
}

.btn-sparkle {
  background: linear-gradient(135deg, #06b6d4, #3b82f6);
  font-size: 1.05rem;
  font-weight: 800;
  box-shadow: 0 6px 20px rgba(6, 182, 212, 0.4);
}

/* Send Action Box in GameOver Modal */
.send-action-box {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 12px;
  margin: 12px 0;
}

.result-locked-player-box {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.result-locked-player-box strong {
  color: #fff;
}

.api-status-msg {
  font-size: 0.82rem;
  font-weight: 700;
  color: #10b981;
  margin-top: 6px;
  text-align: center;
}

/* ----------------------------------------------------
   Responsive: Tablet
   ---------------------------------------------------- */
@media (max-width: 900px) {
  .game-container {
    padding: 10px 12px;
    gap: 10px;
  }

  .game-header {
    flex-wrap: wrap;
    gap: 10px;
    padding: 10px 12px;
  }

  .header-left {
    flex: 1 1 auto;
    min-width: 0;
  }

  .game-title-group {
    min-width: 0;
  }

  .game-title-group h1 {
    font-size: 1.15rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .game-subtitle {
    font-size: 0.72rem;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .header-right {
    flex-wrap: wrap;
    gap: 6px;
    justify-content: flex-end;
  }

  .header-stat-badge {
    min-width: 56px;
    padding: 4px 8px;
  }

  .decision-buttons {
    gap: 8px;
  }

  .btn-submit-action {
    font-size: 1.05rem;
    padding: 12px 8px;
  }
}

/* ----------------------------------------------------
   Responsive: Phone / narrow tablet
   ---------------------------------------------------- */
@media (max-width: 700px) {
  .label-full { display: none; }
  .label-short { display: inline; }

  .game-container {
    padding: 8px;
    padding-left: max(8px, env(safe-area-inset-left));
    padding-right: max(8px, env(safe-area-inset-right));
    padding-bottom: max(10px, env(safe-area-inset-bottom));
    gap: 8px;
  }

  .game-header {
    flex-direction: column;
    align-items: stretch;
    padding: 10px;
    gap: 8px;
  }

  .header-left {
    width: 100%;
  }

  .game-title-group h1 {
    font-size: 1.1rem;
    white-space: normal;
  }

  .game-subtitle {
    display: none; /* prevents vertical squeezed text on narrow widths */
  }

  .header-right {
    width: 100%;
    justify-content: space-between;
    gap: 6px;
  }

  .user-profile-card {
    flex: 1 1 auto;
    min-width: 0;
    padding: 6px 8px;
  }

  .profile-name {
    font-size: 0.8rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 7em;
  }

  .header-stat-badge {
    flex: 0 0 auto;
    min-width: 52px;
    padding: 4px 6px;
  }

  .stat-badge-label {
    font-size: 0.62rem;
  }

  .stat-badge-val {
    font-size: 0.9rem;
  }

  .btn-sound {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
  }

  .canvas-tool-bar {
    flex-wrap: wrap;
    gap: 6px;
  }

  .floating-tool-palette {
    width: 100%;
    justify-content: stretch;
    padding: 6px 8px;
    gap: 6px;
  }

  .tool-guide-text {
    display: none;
  }

  .tool-btn {
    flex: 1;
    min-height: 44px;
    padding: 10px 8px;
    font-size: 0.9rem;
  }

  .canvas-wrapper {
    overflow: visible;
  }

  .clues-panel {
    position: static;
    margin-top: 8px;
    left: auto;
    right: auto;
    bottom: auto;
    padding: 8px 10px;
    border-radius: 12px;
  }

  .clues-header {
    font-size: 0.72rem;
    flex-wrap: wrap;
    gap: 4px;
  }

  .decision-section {
    margin-top: 6px;
    position: relative;
    z-index: 1;
    padding-bottom: env(safe-area-inset-bottom);
    background: none;
  }

  .decision-buttons {
    flex-direction: column;
    max-width: none;
    gap: 8px;
  }

  .btn-submit-action {
    width: 100%;
    flex: none;
    font-size: 1.05rem;
    padding: 14px 12px;
    min-height: 48px;
    white-space: normal;
  }

  .game-container.is-stack-layout #geometry-canvas {
    max-height: min(52vh, 560px);
  }

  .game-container.is-animating.is-stack-layout #geometry-canvas,
  .game-container.modal-open.is-stack-layout #geometry-canvas {
    max-height: min(48vh, 520px);
  }

  .status-hud-bar {
    grid-template-columns: repeat(3, 1fr);
    padding: 8px 10px;
    gap: 6px;
  }

  .condition-options {
    grid-template-columns: repeat(2, 1fr);
  }

  .modal-backdrop {
    padding: 8px;
    align-items: flex-start;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .modal-card {
    max-height: 90vh;
    max-height: 90dvh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
    width: 100%;
    max-width: 100%;
    padding: 14px;
    margin: 8px auto;
  }

  /* Bottom sheet: leave upper canvas visible for overlap / counterexample replay */
  #result-modal.modal-backdrop {
    align-items: flex-end;
    justify-content: flex-end;
    padding: 0;
    background: linear-gradient(
      to bottom,
      rgba(0, 0, 0, 0.15) 0%,
      rgba(0, 0, 0, 0.45) 42%,
      rgba(0, 0, 0, 0.72) 100%
    );
    pointer-events: auto;
  }

  #result-modal .modal-card {
    width: 100%;
    max-width: 100%;
    margin: 0;
    border-radius: 18px 18px 0 0;
    max-height: 46dvh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
  }

  #result-modal .result-header {
    margin-bottom: 8px;
  }

  #result-modal .result-header h2 {
    font-size: 1.15rem;
  }

  #result-modal .result-subtitle {
    font-size: 0.85rem;
    margin-bottom: 8px;
  }

  #result-modal .math-note-box {
    font-size: 0.78rem;
    padding: 8px 10px;
    margin-bottom: 8px;
  }

  #result-modal .view-toggle-container {
    margin-bottom: 8px;
  }

  #result-modal .btn-view-toggle,
  #result-modal .btn-modal-action {
    min-height: 44px;
    font-size: 0.95rem;
  }

  .modal-card.modal-opening {
    max-height: 92vh;
    max-height: 92dvh;
    padding: 12px;
  }

  .view-toggle-buttons {
    flex-wrap: wrap;
  }

  .btn-view-toggle,
  .btn-modal-action {
    min-height: 44px;
  }

  .leaderboard-table-wrapper {
    max-height: 200px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    touch-action: pan-y;
  }

  .leaderboard-table th,
  .leaderboard-table td {
    padding: 8px 6px;
    font-size: 0.78rem;
  }

  .champ-card {
    padding: 8px 12px;
  }

  .champ-trophy {
    font-size: 1.6rem;
  }

  .champ-name {
    font-size: 0.95rem;
  }

  .champ-score {
    font-size: 1.5rem;
  }

  .ce-canvas-wrapper {
    max-width: 100%;
  }

  #ce-canvas {
    width: 100%;
    height: auto;
    aspect-ratio: 440 / 220;
    max-height: 140px;
  }

  .gameover-actions {
    flex-direction: column;
  }

  .gameover-actions .btn-modal-action {
    width: 100%;
  }
}

/* Very small phones */
@media (max-width: 380px) {
  .header-stat-badge:nth-child(4) {
    display: none; /* hide "최고 기록" to free space */
  }

  .stat-badge-val {
    font-size: 0.82rem;
  }

  .btn-submit-action {
    font-size: 0.98rem;
    padding: 12px 10px;
  }
}

/* Landscape phones: keep side-by-side canvas usable */
@media (max-height: 500px) and (orientation: landscape) {
  .game-subtitle {
    display: none;
  }

  .game-header {
    padding: 6px 10px;
  }

  #geometry-canvas,
  .game-container.is-stack-layout #geometry-canvas {
    aspect-ratio: 900 / 420;
    max-height: 52vh;
  }

  .decision-buttons {
    flex-direction: row;
  }

  .btn-submit-action {
    font-size: 0.9rem;
    padding: 10px 6px;
    min-height: 42px;
  }

  .label-full { display: none; }
  .label-short { display: inline; }
}