/* ==========================================================================
   NeoPuzzle — Modern Fullscreen Dark UI Design System
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@400;500;600;700;800&display=swap');

:root {
  --bg-dark: #0a0e1a;
  --bg-glass: rgba(13, 18, 32, 0.75);
  --bg-glass-strong: rgba(13, 18, 32, 0.92);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(59, 91, 219, 0.45);

  --text-primary: #f1f5f9;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --accent-gold: #3b5bdb;
  --accent-green: #10b981;
  --accent-red: #ef4444;
  --accent-blue: #3b5bdb;
  --accent-cyan: #06b6d4;
  --accent-glow: rgba(59, 91, 219, 0.35);

  --font-sans: 'Plus Jakarta Sans', 'Inter', -apple-system, sans-serif;
  --font-mono: 'Plus Jakarta Sans', 'Inter', sans-serif;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 100px;

  --blur: 14px;
  --blur-strong: 24px;
}

[data-theme="light"] {
  --bg-dark: #f8fafc;
  --bg-glass: rgba(255, 255, 255, 0.85);
  --bg-glass-strong: rgba(255, 255, 255, 0.95);
  --border-glass: rgba(15, 23, 42, 0.1);
  --border-accent: rgba(59, 91, 219, 0.45);

  --text-primary: #0f172a;
  --text-muted: #475569;
  --text-dim: #94a3b8;

  --accent-gold: #3b5bdb;
  --accent-green: #059669;
  --accent-red: #dc2626;
  --accent-blue: #3b5bdb;
  --accent-cyan: #0891b2;
  --accent-glow: rgba(59, 91, 219, 0.25);
}

/* Light Mode Specific Overrides */
[data-theme="light"] #app {
  background: var(--bg-dark);
}

[data-theme="light"] .navbar {
  background: var(--bg-glass-strong);
  border-bottom: 1px solid var(--border-glass);
}

[data-theme="light"] .gallery-sidebar {
  background: var(--bg-glass-strong);
  border-left: 1px solid var(--border-glass);
}

[data-theme="light"] .gallery-header {
  border-bottom: 1px solid var(--border-glass);
}

[data-theme="light"] .brand-divider {
  background: rgba(15, 23, 42, 0.15);
}

[data-theme="light"] .brand-logo {
  filter: invert(1) hue-rotate(180deg) brightness(0.2);
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  font-family: var(--font-sans);
  background: var(--bg-dark);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ======================== Top Navbar ======================== */

.navbar {
  width: 100%;
  height: 72px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border-bottom: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  padding: 0 24px;
  z-index: 200;
  flex-shrink: 0;
  overflow: visible;
  position: relative;
  transition: background 0.3s ease, border-color 0.3s ease, height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: height, padding;
}

/* Dynamic Fullscreen Mode Navbar & Layout Height */
[data-fullscreen="true"] .navbar,
:fullscreen .navbar,
:-webkit-full-screen .navbar {
  height: 90px;
  padding: 0 32px;
}

[data-fullscreen="true"] .settings-panel,
:fullscreen .settings-panel,
:-webkit-full-screen .settings-panel {
  top: 98px;
}

[data-fullscreen="true"] .brand-logo,
:fullscreen .brand-logo,
:-webkit-full-screen .brand-logo {
  height: 38px;
}

[data-fullscreen="true"] .brand-name,
:fullscreen .brand-name,
:-webkit-full-screen .brand-name {
  font-size: 1.25rem;
  white-space: nowrap;
}

[data-fullscreen="true"] .brand-sub,
:fullscreen .brand-sub,
:-webkit-full-screen .brand-sub {
  white-space: nowrap;
}

.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
  position: relative;
  width: auto;
  flex-shrink: 0;
}

.nav-right {
  justify-content: flex-end;
}

.nav-center {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  height: 100%;
}

/* ======================== Layout ======================== */

#app {
  display: flex;
  flex-direction: row;
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  background: var(--bg-dark);
  position: relative;
  transition: background 0.3s ease;
}

#mainCol {
  flex: 1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

#stage {
  position: relative;
  flex: 1;
  width: 100%;
  height: calc(100vh - 72px);
  overflow: visible;
  background: var(--bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  transition: height 0.35s cubic-bezier(0.16, 1, 0.3, 1), padding 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: height, padding;
}

[data-fullscreen="true"] #stage,
:fullscreen #stage {
  height: calc(100vh - 90px);
  padding: 32px 24px 64px 24px;
}

#webcam {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0;
  pointer-events: none;
}

.canvas-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-lg);
  overflow: visible;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.45), 0 0 0 1px var(--border-glass);
  max-width: 100%;
  max-height: 100%;
  aspect-ratio: var(--canvas-aspect, 16 / 9);
  transition: width 0.35s cubic-bezier(0.16, 1, 0.3, 1), height 0.35s cubic-bezier(0.16, 1, 0.3, 1), max-height 0.35s cubic-bezier(0.16, 1, 0.3, 1), max-width 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: width, height, max-width, max-height;
}

#sceneCanvas {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-lg);
}

/* ======================== HUD Top ======================== */

.hud-top {
  position: absolute;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 24px;
  background: linear-gradient(180deg, rgba(10, 12, 16, 0.75) 0%, transparent 100%);
  pointer-events: none;
  z-index: 5;
}

.hud-top > * {
  pointer-events: auto;
}

.hud-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  user-select: none;
}

.brand-logo {
  height: 20px;
  max-height: 24px;
  width: auto;
  object-fit: contain;
}

.brand-divider {
  width: 1px;
  height: 18px;
  background: var(--text-dim);
  opacity: 0.35;
  margin: 0 4px;
  flex-shrink: 0;
}

.brand i {
  font-size: 1.4rem;
  color: var(--accent-gold);
}

.brand-name {
  font-family: 'Outfit', 'Plus Jakarta Sans', sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: 1.5px;
  color: var(--text-primary);
}

.brand-accent {
  color: var(--accent-gold);
}

.brand-sub {
  font-size: 0.75rem;
  color: var(--text-dim);
  letter-spacing: 0.5px;
  margin-left: 4px;
}

.status-pill {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border: 1px solid var(--border-glass);
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  color: var(--text-muted);
  white-space: nowrap;
  width: auto;
  flex-shrink: 0;
  transition: all 0.3s ease;
}

#statusText {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--text-dim);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.status-dot.live {
  background: var(--accent-gold);
  box-shadow: 0 0 8px var(--accent-gold);
  animation: pulse-dot 1.5s ease-in-out infinite;
}

.status-dot.armed {
  background: #f59e0b;
  box-shadow: 0 0 10px #f59e0b;
  animation: pulse-dot 0.6s ease-in-out infinite;
}

.status-dot.solved {
  background: var(--accent-green);
  box-shadow: 0 0 8px var(--accent-green);
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

/* ======================== Progress Badge ======================== */

.progress-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border: 1px solid var(--border-glass);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.progress-badge.visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.progress-badge.solved {
  border-color: rgba(16, 185, 129, 0.4);
  color: var(--accent-green);
}

.progress-badge i {
  font-size: 1rem;
}

/* ======================== Filter Control ======================== */

.filter-control {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border-glass);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
  z-index: 10;
}

.filter-control i {
  font-size: 1rem;
  color: var(--text-muted);
}

.filter-select {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  outline: none;
  cursor: pointer;
  -webkit-appearance: none;
}

.filter-select option {
  background: var(--bg-dark);
  color: var(--text-primary);
}

/* ======================== Error Banner ======================== */

.error-banner {
  display: none;
  position: absolute;
  bottom: 60px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(224, 83, 61, 0.15);
  border: 1px solid rgba(224, 83, 61, 0.4);
  color: var(--accent-red);
  padding: 8px 20px;
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  z-index: 20;
  max-width: 90%;
  text-align: center;
}

/* ======================== Loading Overlay ======================== */

.overlay {
  position: absolute;
  inset: 0;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 50;
  transition: opacity 0.4s ease;
}

.overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.loader-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spinner {
  width: 36px;
  height: 36px;
  border: 2.5px solid rgba(255, 255, 255, 0.08);
  border-top-color: var(--accent-gold);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loader-content p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* ======================== Instruction Toast (Bottom of Stage) ======================== */

.instruction-toast {
  position: absolute;
  bottom: 14px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border: 1px solid var(--border-glass);
  padding: 10px 24px;
  border-radius: var(--radius-pill);
  font-size: 1rem;
  color: var(--text-primary);
  z-index: 50;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  transition: all 0.3s ease;
}

/* ======================== Buttons ======================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.btn-retry {
  background: var(--accent-gold);
  color: #fff;
}

.btn-retry:hover:not(:disabled) {
  background: #2f4fc9;
}

.btn-download {
  width: 100%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
}

.btn-download:hover:not(:disabled) {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-reset {
  width: 100%;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-glass);
  color: var(--text-dim);
  opacity: 0.45;
  cursor: not-allowed;
  transition: all 0.25s ease;
}

.btn-reset:not(:disabled) {
  background: rgba(239, 68, 68, 0.12);
  border-color: rgba(239, 68, 68, 0.35);
  color: #ef4444;
  opacity: 1;
  cursor: pointer;
}

.btn-reset:hover:not(:disabled) {
  background: rgba(239, 68, 68, 0.22);
  border-color: rgba(239, 68, 68, 0.6);
  color: #f87171;
  box-shadow: 0 4px 16px rgba(239, 68, 68, 0.2);
}

/* ======================== Timer Display ======================== */

.timer-badge {
  display: none;
  align-items: center;
  gap: 8px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border: 1px solid var(--border-glass);
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-primary);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-8px);
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.timer-badge.visible {
  display: flex !important;
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.timer-badge.warning {
  color: var(--accent-gold);
  border-color: var(--border-accent);
  animation: pulse-timer 1s ease-in-out infinite;
}

.timer-badge.danger {
  color: var(--accent-red);
  border-color: rgba(239, 68, 68, 0.4);
  animation: pulse-timer 0.5s ease-in-out infinite;
}

/* ======================== Vertical Gallery Sidebar ======================== */

.gallery-sidebar {
  position: relative;
  width: 360px;
  height: 100vh;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border-left: 1px solid var(--border-glass);
  border-radius: 0;
  display: flex;
  flex-direction: column;
  padding: 0;
  flex-shrink: 0;
  z-index: 150;
  transition: all 0.3s ease;
}

.gallery-sidebar.collapsed {
  display: none !important;
}

.gallery-header {
  height: 72px;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  border-bottom: 1px solid var(--border-glass);
  box-sizing: border-box;
  flex-shrink: 0;
  transition: height 0.3s ease, padding 0.3s ease;
}

[data-fullscreen="true"] .gallery-header,
:fullscreen .gallery-header {
  height: 90px;
  padding: 0 24px;
}

.gallery-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  gap: 14px;
  min-height: 0;
  overflow: hidden;
}

.gallery-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.gallery-title i {
  font-size: 1.1rem;
  color: var(--accent-gold);
}

.gallery-count {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-glass);
}

.gallery-strip {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
}

.gallery-strip::-webkit-scrollbar {
  width: 4px;
}

.gallery-strip::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}

.gallery-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 180px;
  text-align: center;
  color: var(--text-dim);
  gap: 10px;
}

.gallery-empty i {
  font-size: 2.2rem;
  opacity: 0.35;
}

.gallery-empty p {
  font-size: 0.8rem;
  line-height: 1.4;
  max-width: 180px;
}

.print {
  background: #fff;
  padding: 6px 6px 10px;
  border-radius: 4px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.4);
  width: 100%;
  height: auto;
}

.print canvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 2px;
}

.print-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: #888;
  letter-spacing: 0.5px;
}

.strip-complete {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  color: var(--accent-green);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.strip-complete.visible {
  opacity: 1;
}

.gallery-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 1px solid var(--border-glass);
  border-left: none;
  padding-top: 12px;
  padding-left: 0;
}

.gallery-actions .btn {
  width: 100%;
  height: 42px;
  font-size: 0.9rem;
}

/* ======================== Settings Panel ======================== */

.action-icon-btn,
.settings-btn {
  background: var(--bg-glass);
  backdrop-filter: blur(var(--blur));
  -webkit-backdrop-filter: blur(var(--blur));
  border: 1px solid var(--border-glass);
  color: var(--text-muted);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.15rem;
  transition: all 0.25s ease;
  flex-shrink: 0;
}

.action-icon-btn:hover,
.settings-btn:hover {
  color: var(--accent-blue);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-1px);
}

.floating-fullscreen-btn {
  position: absolute;
  bottom: 14px;
  right: 14px;
  z-index: 25;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1.25rem;
  transition: all 0.25s ease;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.floating-fullscreen-btn:hover {
  color: var(--accent-blue);
  border-color: rgba(255, 255, 255, 0.25);
  transform: scale(1.08);
  box-shadow: 0 10px 28px rgba(59, 91, 219, 0.3);
}

.stage-top-right {
  position: absolute;
  top: 16px;
  right: 16px;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 12px;
}

.stage-top-right .status-pill {
  position: relative;
  top: 0; right: 0;
  transform: none;
}

.stage-top-right .timer-badge {
  position: relative;
  top: 0; right: 0;
  transform: none;
}

/* Dynamic Vertical HUD Badge Motion (Tabbed Mode -> Inside Camera | Fullscreen Mode -> Outside Camera) */

.progress-badge,
.stage-top-right,
.instruction-toast {
  transition: top 0.35s cubic-bezier(0.16, 1, 0.3, 1), bottom 0.35s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease, transform 0.3s ease;
}

[data-fullscreen="true"] .progress-badge,
:fullscreen .progress-badge {
  top: -40px;
  left: 0px;
}

[data-fullscreen="true"] .stage-top-right,
:fullscreen .stage-top-right {
  top: -40px;
  right: 0px;
}

[data-fullscreen="true"] .instruction-toast,
:fullscreen .instruction-toast {
  bottom: -52px;
}

.settings-panel {
  position: fixed;
  top: 80px;
  right: 384px;
  background: var(--bg-glass-strong);
  backdrop-filter: blur(var(--blur-strong));
  -webkit-backdrop-filter: blur(var(--blur-strong));
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-lg);
  padding: 20px;
  z-index: 99999;
  min-width: 260px;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.7);
}

.settings-panel.open {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.settings-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.settings-title i {
  color: var(--accent-gold);
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.settings-group-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.5px;
  text-transform: uppercase;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background 0.2s ease;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.radio-option:hover {
  background: rgba(255, 255, 255, 0.04);
}

.radio-option input[type="radio"] {
  appearance: none;
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border: 2px solid var(--text-dim);
  border-radius: 50%;
  cursor: pointer;
  position: relative;
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.radio-option input[type="radio"]:checked {
  border-color: var(--accent-gold);
}

.radio-option input[type="radio"]:checked::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 7px;
  height: 7px;
  background: var(--accent-gold);
  border-radius: 50%;
}

.radio-option input[type="radio"]:checked + span {
  color: var(--text-primary);
}

.radio-option.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.radio-option.disabled input[type="radio"] {
  cursor: not-allowed;
}

.settings-select {
  width: 100%;
  padding: 8px 12px;
  background: var(--bg-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.85rem;
  outline: none;
  cursor: pointer;
  margin-top: 4px;
  transition: border-color 0.2s ease;
}

.settings-select:hover, .settings-select:focus {
  border-color: var(--accent-blue);
}

.settings-select option {
  background: var(--bg-dark);
  color: var(--text-primary);
}

.settings-notice {
  font-size: 0.75rem;
  color: var(--accent-gold);
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px solid var(--border-glass);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ======================== Canvas Fullscreen Popups ======================== */

.canvas-popup {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  width: 100%; height: 100%;
  background: rgba(10, 12, 16, 0.88);
  border: none;
  border-radius: 0;
  padding: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  z-index: 15;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.canvas-popup.visible {
  opacity: 1;
  pointer-events: auto;
}

.canvas-popup .popup-icon {
  font-size: 4rem;
  margin-bottom: 14px;
}

.canvas-popup .popup-title {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 8px;
  letter-spacing: 0.5px;
}

.canvas-popup .popup-sub {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 24px;
}

.popup-solved .popup-icon { color: var(--accent-green); }
.popup-solved .popup-title { color: var(--accent-green); }

.popup-timeup .popup-icon { color: var(--accent-red); }
.popup-timeup .popup-title { color: var(--accent-red); }

/* ======================== Responsive ======================== */

@media (max-width: 768px) {
  .brand-sub {
    display: none;
  }

  .filter-control {
    top: auto;
    bottom: 16px;
    left: 16px;
    transform: none;
  }
}