/* ============================================================
   VIRTUAL STUDY ROOM — style.css
   Aesthetic: Refined dark glass · Warm candlelight accents
   Fonts: DM Serif Display + DM Mono + Lato
   ============================================================ */

/* ── CSS Variables / Themes ─────────────────────────────── */
:root {
  --font-display: 'DM Serif Display', serif;
  --font-mono: 'DM Mono', monospace;
  --font-body: 'Lato', sans-serif;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-xl: 32px;
}

[data-theme="night"] {
  --bg-primary: #0d1117;
  --bg-glass: rgba(18, 24, 36, 0.65);
  --bg-glass-hover: rgba(28, 36, 52, 0.75);
  --bg-card: rgba(22, 30, 46, 0.6);
  --border: rgba(255,255,255,0.07);
  --border-accent: rgba(167, 139, 250, 0.3);

  --text-primary: #e8eaf0;
  --text-secondary: rgba(200,205,220,0.6);
  --text-dim: rgba(150,160,180,0.4);

  --accent: #a78bfa;
  --accent-glow: rgba(167,139,250,0.25);
  --accent-2: #f0abfc;
  --ring-color: #a78bfa;
  --ring-track: rgba(167,139,250,0.12);

  --btn-primary-bg: rgba(167,139,250,0.15);
  --btn-primary-border: rgba(167,139,250,0.4);
  --btn-primary-text: #c4b5fd;
  --btn-primary-glow: rgba(167,139,250,0.2);

  --particle-color: rgba(167,139,250,0.6);
  --gradient-1: #1a1040;
  --gradient-2: #0d1117;
  --gradient-3: #0a1628;
}

[data-theme="library"] {
  --bg-primary: #1a130a;
  --bg-glass: rgba(30, 20, 10, 0.7);
  --bg-glass-hover: rgba(42, 28, 14, 0.8);
  --bg-card: rgba(36, 24, 12, 0.65);
  --border: rgba(255,200,100,0.08);
  --border-accent: rgba(251,191,36,0.3);

  --text-primary: #f5e6c8;
  --text-secondary: rgba(230,200,140,0.6);
  --text-dim: rgba(180,150,90,0.4);

  --accent: #fbbf24;
  --accent-glow: rgba(251,191,36,0.2);
  --accent-2: #f97316;
  --ring-color: #fbbf24;
  --ring-track: rgba(251,191,36,0.1);

  --btn-primary-bg: rgba(251,191,36,0.12);
  --btn-primary-border: rgba(251,191,36,0.35);
  --btn-primary-text: #fde68a;
  --btn-primary-glow: rgba(251,191,36,0.18);

  --particle-color: rgba(251,191,36,0.5);
  --gradient-1: #2d1a06;
  --gradient-2: #1a130a;
  --gradient-3: #120e07;
}

[data-theme="rain"] {
  --bg-primary: #060e1a;
  --bg-glass: rgba(8, 18, 36, 0.7);
  --bg-glass-hover: rgba(12, 24, 46, 0.8);
  --bg-card: rgba(10, 20, 40, 0.65);
  --border: rgba(100,180,255,0.08);
  --border-accent: rgba(96,165,250,0.3);

  --text-primary: #cce4ff;
  --text-secondary: rgba(150,200,255,0.6);
  --text-dim: rgba(100,160,220,0.4);

  --accent: #60a5fa;
  --accent-glow: rgba(96,165,250,0.22);
  --accent-2: #38bdf8;
  --ring-color: #60a5fa;
  --ring-track: rgba(96,165,250,0.1);

  --btn-primary-bg: rgba(96,165,250,0.12);
  --btn-primary-border: rgba(96,165,250,0.35);
  --btn-primary-text: #bfdbfe;
  --btn-primary-glow: rgba(96,165,250,0.18);

  --particle-color: rgba(148,210,255,0.7);
  --gradient-1: #0a1e3a;
  --gradient-2: #060e1a;
  --gradient-3: #04090f;
}

/* ── Reset & Base ────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100dvh;
  overflow: hidden;
  transition: background 0.6s ease, color 0.4s ease;
  cursor: default;
  user-select: none;
}

button { cursor: pointer; border: none; background: none; font-family: inherit; }
input { font-family: inherit; }
svg { display: block; flex-shrink: 0; }
kbd {
  font-family: var(--font-mono);
  font-size: 0.7em;
  background: var(--border);
  border: 1px solid var(--border-accent);
  border-radius: 4px;
  padding: 1px 5px;
}

/* ── Background Layer ────────────────────────────────────── */
#bg-layer {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none;
}

#particle-canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  opacity: 0.9;
}

.bg-gradient {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 10%, var(--gradient-1) 0%, transparent 60%),
    radial-gradient(ellipse 60% 80% at 80% 90%, var(--gradient-3) 0%, transparent 50%),
    var(--gradient-2);
  transition: background 0.8s ease;
}

.window-frame {
  position: absolute;
  right: 5%;
  top: 8%;
  width: min(260px, 30vw);
  height: min(180px, 25vh);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  overflow: hidden;
  opacity: 0.18;
}

.window-light {
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 30%, var(--accent) 0%, transparent 70%);
  animation: flicker 4s ease-in-out infinite;
}

@keyframes flicker {
  0%, 100% { opacity: 0.6; }
  25% { opacity: 0.3; }
  50% { opacity: 0.8; }
  75% { opacity: 0.45; }
}

/* ── Main App ────────────────────────────────────────────── */
#app {
  position: relative;
  z-index: 10;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  min-height: 100dvh;
  padding: 0 1rem 1rem;
  gap: 0;
}

/* ── Top Bar ─────────────────────────────────────────────── */
#top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 900px;
  padding: 0.75rem 0;
  gap: 1rem;
}

#top-left, #top-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
}
#top-right { justify-content: flex-end; }

.logo-text {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.15rem;
  letter-spacing: 0.03em;
  color: var(--text-primary);
  opacity: 0.85;
  white-space: nowrap;
}

#task-toggle-btn {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  padding: 0.35rem 0.6rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  transition: all 0.2s ease;
  max-width: 180px;
  overflow: hidden;
  white-space: nowrap;
}

#task-toggle-btn:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--bg-glass-hover);
}

#task-label-preview {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

#social-proof {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.dot-live {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: #4ade80;
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.7); }
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  color: var(--text-secondary);
  transition: all 0.2s ease;
  flex-shrink: 0;
}

.icon-btn:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--bg-glass-hover);
  transform: translateY(-1px);
}

.icon-btn.small { width: 26px; height: 26px; }

/* ── Task Popover ────────────────────────────────────────── */
#task-popover {
  position: fixed;
  top: 64px;
  left: 1rem;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  display: none;
  gap: 0.5rem;
  align-items: center;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  min-width: 280px;
  animation: popover-in 0.2s var(--ease-spring);
}

#task-popover.open {
  display: flex;
}

@keyframes popover-in {
  from { opacity: 0; transform: translateY(-8px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

#task-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  padding: 0.25rem;
}

#task-input::placeholder { color: var(--text-dim); }

#task-save-btn {
  background: var(--btn-primary-bg);
  border: 1px solid var(--btn-primary-border);
  color: var(--btn-primary-text);
  font-size: 0.75rem;
  font-family: var(--font-mono);
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}

#task-save-btn:hover {
  background: var(--btn-primary-border);
  box-shadow: 0 0 12px var(--btn-primary-glow);
}

/* ── Stats Panel ─────────────────────────────────────────── */
#stats-panel {
  position: fixed;
  top: 64px;
  right: 1rem;
  z-index: 100;
  background: var(--bg-glass);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  min-width: 200px;
  transform: translateX(calc(100% + 2rem));
  transition: transform 0.3s var(--ease-out), opacity 0.3s ease;
  opacity: 0;
  pointer-events: none;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

#stats-panel.open {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

#stats-panel h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 0.95rem;
  color: var(--accent);
  margin-bottom: 0.75rem;
  letter-spacing: 0.02em;
}

.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.3rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.78rem;
}

.stat-row:last-of-type { border-bottom: none; }
.stat-row span { color: var(--text-secondary); }
.stat-row strong { color: var(--text-primary); font-family: var(--font-mono); }

#insight-bar {
  margin-top: 0.75rem;
  font-size: 0.73rem;
  color: var(--accent);
  font-family: var(--font-mono);
  line-height: 1.5;
}

/* ── Main Content / Timer ────────────────────────────────── */
#main-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.25rem;
  flex: 1;
  justify-content: center;
  width: 100%;
  max-width: 420px;
  padding: 1rem 0;
}

#session-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

#session-type-label {
  background: var(--bg-card);
  border: 1px solid var(--border-accent);
  padding: 0.2rem 0.7rem;
  border-radius: 100px;
  color: var(--accent);
}

#session-cycle-dots {
  display: flex;
  gap: 4px;
}

.cycle-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--border-accent);
  transition: background 0.3s ease;
}

.cycle-dot.filled { background: var(--accent); }

/* Timer Ring */
#timer-wrap {
  position: relative;
  width: min(240px, 60vw);
  height: min(240px, 60vw);
  flex-shrink: 0;
}

#progress-ring {
  width: 100%; height: 100%;
  transform: rotate(-90deg);
}

.ring-track {
  fill: none;
  stroke: var(--ring-track);
  stroke-width: 3;
  transition: stroke 0.5s ease;
}

.ring-fill {
  fill: none;
  stroke: var(--ring-color);
  stroke-width: 3;
  stroke-linecap: round;
  stroke-dasharray: 678.6;
  stroke-dashoffset: 0;
  transition: stroke-dashoffset 1s linear, stroke 0.5s ease;
  filter: drop-shadow(0 0 6px var(--accent-glow));
}

#timer-display {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: clamp(2.8rem, 11vw, 3.8rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  gap: 0.02em;
}

.colon {
  animation: blink 1s step-end infinite;
  opacity: 0.6;
  font-weight: 300;
}

@keyframes blink {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 0.15; }
}

#timer-display.timer-running .colon { animation-play-state: running; }
#timer-display.timer-paused .colon { animation-play-state: paused; }

#task-display {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-secondary);
  text-align: center;
  min-height: 1.2em;
  max-width: 280px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.4s ease;
}

#task-display.has-task { opacity: 1; }

/* ── Timer Controls ──────────────────────────────────────── */
#timer-controls {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.ctrl-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all 0.2s var(--ease-spring);
  position: relative;
}

.ctrl-btn.primary {
  width: 60px; height: 60px;
  background: var(--btn-primary-bg);
  border: 1.5px solid var(--btn-primary-border);
  color: var(--btn-primary-text);
  box-shadow: 0 0 20px var(--btn-primary-glow), inset 0 1px 0 rgba(255,255,255,0.08);
}

.ctrl-btn.primary:hover {
  transform: scale(1.08);
  box-shadow: 0 0 32px var(--btn-primary-glow), inset 0 1px 0 rgba(255,255,255,0.1);
  background: var(--btn-primary-border);
}

.ctrl-btn.primary:active { transform: scale(0.96); }

.ctrl-btn.secondary {
  width: 44px; height: 44px;
  background: var(--bg-glass);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  backdrop-filter: blur(10px);
}

.ctrl-btn.secondary:hover {
  color: var(--accent);
  border-color: var(--border-accent);
  background: var(--bg-glass-hover);
  transform: scale(1.06);
}

.ctrl-btn.secondary:active { transform: scale(0.95); }

.ctrl-btn.small { width: 40px; height: 40px; }

.ctrl-btn.primary.running {
  animation: pulse-ring 2s ease-in-out infinite;
}

@keyframes pulse-ring {
  0%, 100% { box-shadow: 0 0 20px var(--btn-primary-glow), inset 0 1px 0 rgba(255,255,255,0.08); }
  50% { box-shadow: 0 0 40px var(--btn-primary-glow), 0 0 60px var(--btn-primary-glow), inset 0 1px 0 rgba(255,255,255,0.1); }
}

/* Settings Row */
#settings-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  justify-content: center;
}

.setting-chip {
  display: flex;
  align-items: center;
  gap: 0.3rem;
  font-size: 0.72rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 0.3rem 0.7rem;
  cursor: default;
  transition: border-color 0.2s ease;
}

.setting-chip:has(input:focus-within) { border-color: var(--border-accent); }

.setting-chip input[type="number"] {
  background: transparent;
  border: none;
  outline: none;
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  width: 28px;
  text-align: center;
  -moz-appearance: textfield;
}

.setting-chip input[type="number"]::-webkit-inner-spin-button,
.setting-chip input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }

.setting-chip input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
  width: 13px; height: 13px;
}

/* ── Sound Panel ─────────────────────────────────────────── */
#sound-panel {
  width: 100%;
  max-width: 700px;
  background: var(--bg-glass);
  backdrop-filter: blur(20px) saturate(1.2);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl) var(--radius-xl) var(--radius-lg) var(--radius-lg);
  padding: 1rem 1.25rem 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  box-shadow: 0 -4px 40px rgba(0,0,0,0.25);
  transition: background 0.4s ease, border-color 0.4s ease;
}

#sound-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.panel-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
  flex-shrink: 0;
}

#master-volume-wrap {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 1;
  color: var(--text-dim);
}

#sound-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.5rem;
}

.sound-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}

.sound-toggle {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  width: 100%;
  padding: 0.6rem 0.3rem;
  border-radius: var(--radius-md);
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all 0.2s var(--ease-spring);
  position: relative;
  overflow: hidden;
}

.sound-toggle::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 50% 0%, var(--accent-glow), transparent 70%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sound-toggle.active {
  border-color: var(--border-accent);
  color: var(--accent);
  background: var(--bg-glass-hover);
}

.sound-toggle.active::before { opacity: 1; }

.sound-toggle:hover {
  transform: translateY(-2px);
  border-color: var(--border-accent);
}

.sound-emoji { font-size: 1.4rem; line-height: 1; }

.sound-name {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.06em;
  color: inherit;
}

.sound-bar {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 10px;
}

.sound-bar span {
  width: 3px;
  background: var(--accent);
  border-radius: 2px;
  opacity: 0;
  transition: height 0.1s ease, opacity 0.2s ease;
}

.sound-toggle.active .sound-bar span {
  opacity: 0.7;
  animation: sound-wave 0.8s ease-in-out infinite;
}

.sound-toggle.active .sound-bar span:nth-child(1) { animation-delay: 0s; }
.sound-toggle.active .sound-bar span:nth-child(2) { animation-delay: 0.15s; }
.sound-toggle.active .sound-bar span:nth-child(3) { animation-delay: 0.3s; }

@keyframes sound-wave {
  0%, 100% { height: 3px; }
  50% { height: 10px; }
}

.sound-vol {
  width: 100%;
  -webkit-appearance: none;
  height: 3px;
  border-radius: 2px;
  background: var(--border);
  outline: none;
  cursor: pointer;
  transition: opacity 0.2s ease;
  opacity: 0.4;
}

.sound-card:has(.sound-toggle.active) .sound-vol { opacity: 1; }

.sound-vol::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  transition: transform 0.15s ease;
}

.sound-vol::-webkit-slider-thumb:hover { transform: scale(1.3); }
.sound-vol::-moz-range-thumb {
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--accent);
  border: none;
  cursor: pointer;
}

/* Master volume slider */
#master-volume {
  flex: 1;
  -webkit-appearance: none;
  height: 3px;
  border-radius: 2px;
  background: linear-gradient(to right, var(--accent) 0%, var(--accent) 60%, var(--border) 60%);
  outline: none;
  cursor: pointer;
}

#master-volume::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  box-shadow: 0 0 6px var(--accent-glow);
}

/* Theme Row */
#theme-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.theme-chip {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.25rem 0.7rem;
  border-radius: 100px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all 0.2s ease;
  letter-spacing: 0.04em;
}

.theme-chip:hover { border-color: var(--border-accent); color: var(--accent); }

.theme-chip.active {
  border-color: var(--border-accent);
  background: var(--btn-primary-bg);
  color: var(--accent);
}

/* ── Distraction Overlay ─────────────────────────────────── */
#distraction-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.85);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

#distraction-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.distraction-inner {
  text-align: center;
  animation: distraction-in 0.4s var(--ease-spring);
}

@keyframes distraction-in {
  from { transform: scale(0.8); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.distraction-icon { font-size: 3rem; display: block; margin-bottom: 0.5rem; }

.distraction-inner p {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 2rem;
  color: var(--text-primary);
}

/* ── Focus Mode ──────────────────────────────────────────── */
#focus-mode {
  position: fixed; inset: 0; z-index: 300;
  background: var(--bg-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
}

#focus-mode.active {
  opacity: 1;
  pointer-events: auto;
}

#focus-timer-display {
  font-family: var(--font-mono);
  font-size: clamp(5rem, 20vw, 9rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  color: var(--text-primary);
  animation: focus-pulse 4s ease-in-out infinite;
}

@keyframes focus-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

#focus-task-label {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-secondary);
  letter-spacing: 0.1em;
}

.focus-hint {
  font-size: 0.72rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  position: absolute;
  bottom: 2rem;
}

/* ── Session Complete Modal ──────────────────────────────── */
#session-modal {
  position: fixed; inset: 0; z-index: 250;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

#session-modal.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-inner {
  background: var(--bg-glass);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: 2rem 2.5rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  animation: modal-in 0.35s var(--ease-spring);
  max-width: 320px;
  width: 90%;
  backdrop-filter: blur(20px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

@keyframes modal-in {
  from { transform: scale(0.85) translateY(20px); opacity: 0; }
  to { transform: none; opacity: 1; }
}

.modal-icon { font-size: 2.5rem; }

#modal-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.6rem;
  color: var(--text-primary);
}

#modal-body {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-family: var(--font-mono);
}

.modal-btns {
  display: flex;
  gap: 0.6rem;
  margin-top: 0.5rem;
}

/* ── Range Input Shared ──────────────────────────────────── */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

input[type="range"]:focus { outline: none; }

/* ── Scrollbar ───────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-accent); border-radius: 2px; }

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 600px) {
  #sound-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  #social-proof { display: none; }

  .window-frame { display: none; }

  #top-bar { padding: 0.5rem 0; }

  .logo-text { font-size: 1rem; }

  #task-toggle-btn { max-width: 120px; }

  #task-popover { left: 0.5rem; right: 0.5rem; min-width: 0; }

  #stats-panel { right: 0.5rem; }
}

@media (max-width: 400px) {
  #sound-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  #settings-row { gap: 0.4rem; }

  .setting-chip { font-size: 0.67rem; padding: 0.25rem 0.5rem; }
}

/* ── Utility / State ─────────────────────────────────────── */
.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.shimmer {
  background: linear-gradient(90deg, transparent 0%, var(--accent-glow) 50%, transparent 100%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
}

@keyframes shimmer {
  from { background-position: -200% 0; }
  to { background-position: 200% 0; }
}