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

:root {
  --color-quiet: #00ff88;
  --color-moderate: #ffc800;
  --color-loud: #ff3232;
  --color-primary: #00d9ff;
  --color-bg-dark: #1a1a2e;
  --color-bg-mid: #16213e;
  --color-text-muted: #8892b0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-mid) 50%, #0f3460 100%);
  min-height: 100vh;
  color: white;
  overflow-x: hidden;
  transition: background 0.5s ease;
}

body.theme-light {
  background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 50%, #cbd5e1 100%);
  color: #1e293b;
}

body.theme-light .controls-panel,
body.theme-light .stat-card,
body.theme-light .setting-item,
body.theme-light .history-chart,
body.theme-light .visualizer-container {
  background: rgba(255, 255, 255, 0.8);
}

body.theme-light .noise-circle {
  background: radial-gradient(circle, #ffffff 0%, #f1f5f9 100%);
  box-shadow: 0 0 60px rgba(0, 217, 255, 0.2), 0 10px 40px rgba(0, 0, 0, 0.1);
}

body.theme-light .db-value {
  background: linear-gradient(180deg, #0c4a6e 0%, #1e40af 100%);
  -webkit-background-clip: text;
  background-clip: text;
}

body.theme-light .icon-btn:hover {
  background: rgba(0, 0, 0, 0.18);
}

body.theme-light .preset-tab {
  border-color: rgba(0, 0, 0, 0.2);
  color: #1e293b;
}

body.theme-light .preset-tab:hover {
  border-color: var(--color-primary);
  background: rgba(0, 217, 255, 0.12);
}

body.theme-light .challenge-section,
body.theme-light .event-log-panel,
body.theme-light .session-history-panel,
body.theme-light .badges-section,
body.theme-light .controls-panel {
  background: rgba(255, 255, 255, 0.75);
  border-color: rgba(0, 0, 0, 0.08);
}

body.theme-light .log-entry {
  color: #334155;
  border-bottom-color: rgba(0, 0, 0, 0.06);
}

body.theme-light .log-time {
  color: #64748b;
}

body.theme-light .session-history-item {
  background: rgba(255, 255, 255, 0.6);
  border-color: rgba(0, 0, 0, 0.08);
}

body.theme-light .badge.locked {
  background: rgba(0, 0, 0, 0.06);
}

body.theme-light .history-chart {
  background: rgba(0, 0, 0, 0.05);
}

body.theme-light .countdown-bar {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(0, 0, 0, 0.1);
}

body.theme-light .modal {
  background: linear-gradient(135deg, #f8fafc, #f1f5f9);
  color: #1e293b;
  border-color: rgba(0, 0, 0, 0.1);
}

body.theme-light .modal p {
  color: #475569;
}

body.theme-light .modal-btn.secondary {
  background: rgba(0, 0, 0, 0.08);
  color: #1e293b;
  border-color: rgba(0, 0, 0, 0.15);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

header {
  text-align: center;
  padding: 20px 0 30px;
}

.header-controls {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.icon-btn {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: none;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: scale(1.05);
}

body.theme-light .icon-btn {
  background: rgba(0, 0, 0, 0.1);
  color: #1e293b;
}

header h1 {
  font-size: 2.5rem;
  background: linear-gradient(90deg, var(--color-primary), var(--color-quiet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 15px;
}

header p {
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* Preset Mode Tabs */
.preset-tabs {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin: 20px 0;
  flex-wrap: wrap;
}

.preset-tab {
  padding: 10px 20px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 25px;
  background: transparent;
  color: white;
  cursor: pointer;
  font-size: 0.95rem;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.preset-tab:hover {
  border-color: var(--color-primary);
  background: rgba(0, 217, 255, 0.1);
}

.preset-tab.active {
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  border-color: transparent;
  color: var(--color-bg-dark);
  font-weight: 600;
}

body.theme-light .preset-tab {
  border-color: rgba(0, 0, 0, 0.2);
  color: #1e293b;
}

.main-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
  margin-bottom: 40px;
}

/* Noise Level Circle */
.noise-circle-container {
  position: relative;
  width: 320px;
  height: 320px;
}

.noise-circle {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-bg-dark) 0%, #0d1b2a 100%);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 60px rgba(0, 217, 255, 0.3), inset 0 0 60px rgba(0, 0, 0, 0.5);
  position: relative;
  z-index: 2;
  transition: all 0.4s ease;
}

.noise-circle.quiet {
  box-shadow: 0 0 80px rgba(0, 255, 136, 0.5), inset 0 0 60px rgba(0, 0, 0, 0.5);
}

.noise-circle.moderate {
  box-shadow: 0 0 80px rgba(255, 200, 0, 0.5), inset 0 0 60px rgba(0, 0, 0, 0.5);
}

.noise-circle.loud {
  box-shadow: 0 0 100px rgba(255, 50, 50, 0.7), inset 0 0 60px rgba(0, 0, 0, 0.5);
  animation: pulse-loud 0.4s ease-in-out infinite;
}

@keyframes pulse-loud {

  0%,
  100% {
    transform: scale(1);
  }

  50% {
    transform: scale(1.03);
  }
}

/* Animated Rings */
.ring {
  position: absolute;
  border-radius: 50%;
  border: 2px solid rgba(0, 217, 255, 0.3);
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: ring-pulse 3s ease-out infinite;
  pointer-events: none;
}

.ring:nth-child(1) {
  width: 340px;
  height: 340px;
  animation-delay: 0s;
}

.ring:nth-child(2) {
  width: 380px;
  height: 380px;
  animation-delay: 1s;
}

.ring:nth-child(3) {
  width: 420px;
  height: 420px;
  animation-delay: 2s;
}

.noise-circle.quiet~.ring {
  border-color: rgba(0, 255, 136, 0.3);
}

.noise-circle.moderate~.ring {
  border-color: rgba(255, 200, 0, 0.3);
}

.noise-circle.loud~.ring {
  border-color: rgba(255, 50, 50, 0.4);
}

@keyframes ring-pulse {
  0% {
    opacity: 0.8;
    transform: translate(-50%, -50%) scale(0.9);
  }

  100% {
    opacity: 0;
    transform: translate(-50%, -50%) scale(1.2);
  }
}

/* Progress Ring */
.progress-ring {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  z-index: 1;
}

.progress-ring circle {
  fill: none;
  stroke-width: 8;
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: center;
  transition: stroke-dashoffset 0.3s ease, stroke 0.3s ease;
}

.progress-ring .bg {
  stroke: rgba(255, 255, 255, 0.1);
}

.progress-ring .progress {
  stroke: var(--color-quiet);
  stroke-dasharray: 942;
  stroke-dashoffset: 942;
}

.db-value {
  font-size: 4.5rem;
  font-weight: bold;
  background: linear-gradient(180deg, #ffffff 0%, #a0a0a0 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  transition: all 0.2s ease;
}

.db-label {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-top: 5px;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.status-text {
  font-size: 1.6rem;
  margin-top: 15px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.status-quiet {
  color: var(--color-quiet);
}

.status-moderate {
  color: var(--color-moderate);
}

.status-loud {
  color: var(--color-loud);
}

/* ===== Animated CSS Noise Creature ===== */
.character-container {
  position: relative;
  width: 90px;
  height: 90px;
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.creature { position: relative; width: 76px; height: 76px; display: flex; align-items: center; justify-content: center; }
.creature-body {
  width: 76px; height: 76px; border-radius: 50%;
  background: var(--c-body, #00e87a);
  box-shadow: 0 0 24px var(--c-glow, rgba(0,255,136,0.5));
  position: relative; transition: background 0.5s ease, box-shadow 0.5s ease, border-radius 0.4s ease;
  animation: creatureIdle 2.8s ease-in-out infinite;
}
.creature-body::before {
  content: ''; position: absolute; top: 12px; left: 14px;
  width: 22px; height: 14px; background: rgba(255,255,255,0.28);
  border-radius: 50%; transform: rotate(-30deg);
}
.creature-eyes { position: absolute; top: 22px; left: 50%; transform: translateX(-50%); display: flex; gap: 16px; }
.creature-eye {
  width: 13px; height: 13px; background: #0a1020; border-radius: 50%;
  position: relative; transition: all 0.35s ease;
}
.creature-eye::after { content: ''; position: absolute; top: 2px; left: 2px; width: 5px; height: 5px; background: white; border-radius: 50%; }
.creature-mouth {
  position: absolute; bottom: 17px; left: 50%; transform: translateX(-50%);
  width: 26px; height: 12px; background: #0a1020;
  border-radius: 0 0 13px 13px; transition: all 0.4s ease; overflow: hidden;
}
.creature-blush { position: absolute; width: 13px; height: 7px; background: rgba(255,100,100,0.35); border-radius: 50%; bottom: 20px; opacity: 0; transition: opacity 0.5s ease; }
.creature-blush-l { left: 9px; }
.creature-blush-r { right: 9px; }
.creature-antennae { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); display: flex; gap: 20px; pointer-events: none; }
.creature-antenna { width: 3px; height: 13px; background: var(--c-body, #00e87a); border-radius: 2px; transition: background 0.5s ease; transform-origin: bottom center; }
.creature-antenna:first-child { transform: rotate(-15deg); }
.creature-antenna:last-child  { transform: rotate(15deg); }

.noise-circle.quiet .creature-body, .noise-circle:not(.monitoring) .creature-body {
  --c-body: #00e87a; --c-glow: rgba(0,255,136,0.45);
  animation: creatureIdle 2.8s ease-in-out infinite;
}
.noise-circle.quiet .creature-blush { opacity: 1; }
.noise-circle.quiet .creature-mouth { width: 24px; height: 11px; border-radius: 0 0 12px 12px; }
.noise-circle.moderate .creature-body {
  --c-body: #ffc800; --c-glow: rgba(255,200,0,0.5);
  border-radius: 46% 54% 48% 52%; animation: creatureWary 1.4s ease-in-out infinite;
}
.noise-circle.moderate .creature-eye { height: 10px; border-radius: 5px; }
.noise-circle.moderate .creature-mouth { width: 28px; height: 7px; border-radius: 3px; bottom: 14px; }
.noise-circle.loud .creature-body {
  --c-body: #ff3232; --c-glow: rgba(255,50,50,0.65);
  border-radius: 42% 58% 44% 56%; animation: creatureScream 0.28s ease-in-out infinite;
}
.noise-circle.loud .creature-eye { height: 16px; border-radius: 50%; }
.noise-circle.loud .creature-mouth { width: 38px; height: 22px; border-radius: 0 0 19px 19px; bottom: 10px; }
.noise-circle.loud .creature-antenna:first-child { animation: antennaL 0.2s ease-in-out infinite; }
.noise-circle.loud .creature-antenna:last-child  { animation: antennaR 0.2s ease-in-out infinite; }

@keyframes creatureIdle  { 0%,100%{transform:scale(1);border-radius:50%;} 50%{transform:scale(1.05) scaleY(1.03);border-radius:48% 52% 50% 50%;} }
@keyframes creatureWary  { 0%,100%{transform:scale(1);} 50%{transform:scale(1.07) rotate(2deg);} }
@keyframes creatureScream { 0%,100%{transform:scale(1) rotate(0);border-radius:42% 58% 44% 56%;} 25%{transform:scale(1.09) rotate(-3deg);border-radius:54% 46% 58% 42%;} 75%{transform:scale(1.06) rotate(3deg);border-radius:44% 56% 46% 54%;} }
@keyframes antennaL { 0%,100%{transform:rotate(-15deg);} 50%{transform:rotate(-38deg);} }
@keyframes antennaR { 0%,100%{transform:rotate(15deg);}  50%{transform:rotate(38deg);}  }
@keyframes shake { 0%,100%{transform:translateX(0) rotate(0);} 25%{transform:translateX(-8px) rotate(-5deg);} 75%{transform:translateX(8px) rotate(5deg);} }

/* ===== Projector / Wall Display Mode ===== */
.projector-overlay {
  position: fixed; inset: 0; z-index: 8000; background: #07071a;
  display: none; flex-direction: column; align-items: center; justify-content: center; gap: 10px; padding: 40px;
}
.projector-overlay.active { display: flex; }
.proj-exit {
  position: fixed; top: 18px; right: 22px;
  padding: 8px 18px; border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.18); background: rgba(255,255,255,0.07);
  color: rgba(255,255,255,0.5); cursor: pointer; font-size: 0.8rem; font-weight: 600;
  transition: all 0.2s; z-index: 8001;
}
.proj-exit:hover { color: white; background: rgba(255,255,255,0.13); }
.proj-class { font-size: 1.5rem; font-weight: 700; color: rgba(255,255,255,0.35); letter-spacing: 1px; }
.proj-creature-body {
  width: 200px; height: 200px; border-radius: 50%;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px;
  position: relative; transition: all 0.5s ease;
}
.proj-creature-body::before {
  content: ''; position: absolute; top: 26px; left: 30px;
  width: 44px; height: 24px; background: rgba(255,255,255,0.2); border-radius: 50%; transform: rotate(-30deg);
}
.proj-creature-body.quiet    { background: radial-gradient(circle at 40% 38%,rgba(255,255,255,.12),transparent 58%), #00e87a; box-shadow: 0 0 100px rgba(0,255,136,.55), 0 0 220px rgba(0,255,136,.2); animation: creatureIdle 2.8s ease-in-out infinite; }
.proj-creature-body.moderate { background: radial-gradient(circle at 40% 38%,rgba(255,255,255,.12),transparent 58%), #ffc800; box-shadow: 0 0 100px rgba(255,200,0,.55), 0 0 220px rgba(255,200,0,.2); animation: creatureWary 1.4s ease-in-out infinite; }
.proj-creature-body.loud     { background: radial-gradient(circle at 40% 38%,rgba(255,255,255,.12),transparent 58%), #ff3232; box-shadow: 0 0 120px rgba(255,50,50,.7), 0 0 260px rgba(255,50,50,.25); animation: creatureScream 0.28s ease-in-out infinite; }
.proj-eyes { display: flex; gap: 28px; }
.proj-eye { width: 26px; height: 26px; background: rgba(8,8,28,.9); border-radius: 50%; position: relative; transition: all 0.3s ease; }
.proj-eye::after { content:''; position:absolute; top:5px; left:5px; width:9px; height:9px; background:white; border-radius:50%; opacity:.85; }
.proj-creature-body.moderate .proj-eye { height: 20px; border-radius: 5px; }
.proj-creature-body.loud    .proj-eye { height: 33px; }
.proj-mouth { width: 52px; height: 24px; background: rgba(8,8,28,.9); border-radius: 0 0 26px 26px; transition: all 0.4s ease; }
.proj-creature-body.moderate .proj-mouth { width: 52px; height: 13px; border-radius: 6px; }
.proj-creature-body.loud    .proj-mouth { width: 78px; height: 44px; border-radius: 0 0 39px 39px; }
.proj-db { font-size: 9rem; font-weight: 900; font-variant-numeric: tabular-nums; line-height: 1; transition: color 0.4s ease; }
.proj-db.quiet    { color: var(--color-quiet); }
.proj-db.moderate { color: var(--color-moderate); }
.proj-db.loud     { color: var(--color-loud); }
.proj-db span { font-size: 2rem; font-weight: 400; opacity: .45; margin-left: 8px; }
.proj-status { font-size: 2.6rem; font-weight: 700; letter-spacing: 1px; transition: color 0.4s ease; }
.proj-status.quiet    { color: var(--color-quiet); }
.proj-status.moderate { color: var(--color-moderate); }
.proj-status.loud     { color: var(--color-loud); }
.proj-score-wrap { display: flex; flex-direction: column; align-items: center; gap: 8px; width: min(680px, 86vw); margin-top: 6px; }
.proj-score-meta { display: flex; justify-content: space-between; width: 100%; font-size: 0.78rem; color: rgba(255,255,255,.35); text-transform: uppercase; letter-spacing: 1.5px; }
.proj-score-track { width: 100%; height: 20px; background: rgba(255,255,255,.06); border-radius: 10px; overflow: hidden; }
.proj-score-fill { height: 100%; border-radius: 10px; background: linear-gradient(90deg, var(--color-primary), var(--color-quiet)); transition: width 1.2s ease, background 0.5s ease; }
.proj-stars { font-size: 2.4rem; letter-spacing: 8px; }
.proj-timer { font-size: 1.4rem; font-weight: 800; color: var(--color-primary); font-variant-numeric: tabular-nums; display: none; }
.proj-timer.show { display: block; }

/* ===== Calibration Wizard ===== */
.cal-modal {
  background: linear-gradient(135deg, #0d1b2a, #1a1a2e);
  border-radius: 24px; padding: 0; overflow: hidden;
  max-width: 460px; width: 100%;
  border: 1px solid rgba(255,255,255,0.1);
  transform: scale(0.9) translateY(20px); transition: transform 0.3s ease;
}
.modal-overlay.active .cal-modal { transform: scale(1) translateY(0); }
.cal-head { padding: 26px 30px 18px; border-bottom: 1px solid rgba(255,255,255,0.07); }
.cal-head h2 { font-size: 1.3rem; margin-bottom: 5px; }
.cal-head p  { color: var(--color-text-muted); font-size: 0.84rem; line-height: 1.5; }
.cal-body { padding: 22px 30px 26px; }
.cal-step { display: none; }
.cal-step.active { display: block; }
.cal-live { font-size: 3.2rem; font-weight: 900; font-variant-numeric: tabular-nums; text-align: center; color: var(--color-primary); margin: 14px 0 4px; }
.cal-live-label { text-align: center; color: var(--color-text-muted); font-size: 0.8rem; margin-bottom: 16px; }
.cal-bar { width:100%; height:12px; background:rgba(255,255,255,0.07); border-radius:6px; overflow:hidden; margin: 12px 0; }
.cal-bar-fill { height:100%; border-radius:6px; background:linear-gradient(90deg,var(--color-primary),var(--color-quiet)); transition:width 0.1s linear; }
.cal-ring-wrap { display:flex; justify-content:center; margin-bottom:16px; }
.cal-ring { position:relative; width:72px; height:72px; }
.cal-ring svg { width:100%; height:100%; transform:rotate(-90deg); }
.cal-ring-num { position:absolute; inset:0; display:flex; align-items:center; justify-content:center; font-size:1.6rem; font-weight:900; color:var(--color-primary); }
.cal-result-row { display:flex; justify-content:space-between; align-items:center; padding:9px 0; border-bottom:1px solid rgba(255,255,255,0.06); font-size:0.86rem; }
.cal-result-row:last-child { border:none; }
.cal-rl { color:var(--color-text-muted); }
.cal-rv { font-weight:700; color:var(--color-primary); }
.cal-tip { background:rgba(0,217,255,0.07); border:1px solid rgba(0,217,255,0.15); border-radius:12px; padding:12px 16px; font-size:0.8rem; color:#ccd6f6; line-height:1.55; margin-bottom:16px; }
.cal-btns { display:flex; gap:10px; justify-content:flex-end; margin-top:20px; }
.cal-btn { padding:10px 22px; border-radius:18px; cursor:pointer; font-weight:600; font-size:0.88rem; transition:all 0.2s; }
.cal-btn.primary { background:linear-gradient(135deg,var(--color-primary),var(--color-quiet)); color:var(--color-bg-dark); border:none; }
.cal-btn.secondary { background:rgba(255,255,255,0.08); color:white; border:1px solid rgba(255,255,255,0.15); }
.cal-btn:hover { transform:scale(1.04); }
.calibrate-btn {
  display:inline-flex; align-items:center; gap:7px;
  padding:9px 18px; border-radius:14px;
  border:1px solid rgba(0,217,255,0.3); background:rgba(0,217,255,0.07);
  color:var(--color-primary); cursor:pointer; font-size:0.84rem;
  font-weight:600; margin-top:14px; transition:all 0.2s;
}
.calibrate-btn:hover { background:rgba(0,217,255,0.14); }

/* ===== Escalating Alert System ===== */
.alert-bar { position:fixed; top:0; left:0; right:0; height:5px; z-index:7000; opacity:0; pointer-events:none; transition:opacity 0.3s ease; }
.alert-bar.warn     { opacity:1; background:var(--color-moderate); animation:alertPulse 0.9s ease-in-out infinite; }
.alert-bar.alarm    { opacity:1; background:var(--color-loud); animation:alertPulse 0.45s ease-in-out infinite; }
.alert-bar.critical { opacity:1; background:var(--color-loud); animation:alertStrobe 0.2s step-end infinite; }
@keyframes alertPulse  { 0%,100%{opacity:.5;} 50%{opacity:1;} }
@keyframes alertStrobe { 0%,49%{opacity:1;} 50%,100%{opacity:.15;} }
.alert-stage-badge { position:fixed; top:14px; left:50%; transform:translateX(-50%); z-index:7001; padding:7px 20px; border-radius:20px; font-weight:700; font-size:0.9rem; display:none; align-items:center; gap:8px; }
.alert-stage-badge.show { display:flex; animation:toastIn 0.3s ease; }
.alert-stage-badge.warn     { background:linear-gradient(135deg,#ff9500,#ffc800); color:#1a1a2e; }
.alert-stage-badge.alarm    { background:linear-gradient(135deg,#ff3232,#ff6b35); color:white; }
.alert-stage-badge.critical { background:#ff0000; color:white; animation:alertStrobe 0.3s step-end infinite,toastIn 0.3s ease; }

/* ===== Weekly Grade Chart ===== */
.grade-chart-section { margin-top:20px; }
.grade-chart-title { font-size:0.78rem; text-transform:uppercase; letter-spacing:1.2px; color:var(--color-text-muted); margin-bottom:10px; }
.grade-chart { display:flex; align-items:flex-end; gap:8px; height:72px; }
.grade-col { flex:1; display:flex; flex-direction:column; align-items:center; gap:4px; height:100%; justify-content:flex-end; }
.grade-col-bar { width:100%; border-radius:5px 5px 0 0; min-height:4px; transition:height 0.5s ease; }
.grade-col-bar.ga { background:linear-gradient(to top,#00c96b,#00ff88); }
.grade-col-bar.gb { background:linear-gradient(to top,#00a8cc,#00d9ff); }
.grade-col-bar.gc { background:linear-gradient(to top,#cc9000,#ffc800); }
.grade-col-bar.gd { background:linear-gradient(to top,#cc4400,#ff6b35); }
.grade-col-bar.gf { background:linear-gradient(to top,#aa0000,#ff3232); }
.grade-col-bar.ge { background:rgba(255,255,255,0.06); min-height:0; height:0 !important; }
.grade-col-lbl { font-size:0.7rem; font-weight:700; color:var(--color-text-muted); }

/* Sound Wave Animation */
.sound-waves {
  position: absolute;
  width: 140px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.noise-circle.monitoring .sound-waves {
  opacity: 1;
}

.sound-wave {
  width: 4px;
  background: linear-gradient(to top, var(--color-quiet), var(--color-primary));
  border-radius: 2px;
  animation: wave 0.8s ease-in-out infinite;
}

.sound-wave:nth-child(1) {
  height: 15px;
  animation-delay: 0s;
}

.sound-wave:nth-child(2) {
  height: 25px;
  animation-delay: 0.1s;
}

.sound-wave:nth-child(3) {
  height: 35px;
  animation-delay: 0.2s;
}

.sound-wave:nth-child(4) {
  height: 25px;
  animation-delay: 0.3s;
}

.sound-wave:nth-child(5) {
  height: 15px;
  animation-delay: 0.4s;
}

@keyframes wave {

  0%,
  100% {
    transform: scaleY(0.5);
  }

  50% {
    transform: scaleY(1);
  }
}

/* Visualizer */
.visualizer-wrapper {
  width: 100%;
  max-width: 900px;
  position: relative;
}

.visualizer-hint {
  text-align: center;
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  letter-spacing: 0.3px;
  opacity: 0.75;
}

.visualizer-container {
  width: 100%;
  height: 140px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 20px;
  padding: 15px 20px;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 3px;
  overflow: visible;
  position: relative;
  cursor: crosshair;
}

.visualizer-container::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 50%;
  background: linear-gradient(to top, rgba(0, 217, 255, 0.05), transparent);
  pointer-events: none;
  border-radius: 0 0 20px 20px;
}

.bar {
  width: 6px;
  background: linear-gradient(to top, var(--color-quiet), var(--color-primary), var(--color-loud));
  border-radius: 3px;
  transition: height 0.05s ease;
  min-height: 4px;
  position: relative;
  pointer-events: none;
}

.bar::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: white;
  border-radius: 3px;
  opacity: 0.8;
}

/* Target level line on visualizer */
.target-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(0, 217, 255, 0.95);
  pointer-events: none;
  z-index: 10;
  transition: top 0.15s ease;
  box-shadow: 0 0 8px rgba(0, 217, 255, 0.6), 0 0 16px rgba(0, 217, 255, 0.3);
}

.target-line::before {
  /* full-width subtle glow band */
  content: '';
  position: absolute;
  left: 0; right: 0;
  top: -3px; bottom: -3px;
  background: rgba(255, 255, 255, 0.12);
  pointer-events: none;
}

.target-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  width: 14px;
  height: 14px;
  background: white;
  border: 2.5px solid var(--color-primary);
  box-shadow: 0 0 10px rgba(0, 217, 255, 0.8), 0 0 20px rgba(0, 217, 255, 0.4);
  pointer-events: none;
  border-radius: 2px;
}

.target-label {
  position: absolute;
  top: 50%;
  right: 10px;
  transform: translateY(-50%);
  background: rgba(0, 10, 30, 0.85);
  border: 1px solid rgba(0, 217, 255, 0.5);
  color: white;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 6px;
  letter-spacing: 0.5px;
  pointer-events: none;
  white-space: nowrap;
}

.target-label-left {
  position: absolute;
  top: 50%;
  left: 10px;
  transform: translateY(-50%);
  color: rgba(255,255,255,0.55);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.8px;
  text-transform: uppercase;
  pointer-events: none;
}

/* Average line on visualizer */
.avg-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  pointer-events: none;
  z-index: 9;
  transition: top 0.5s ease;
}

.avg-line::after {
  content: '';
  position: absolute;
  left: 0; right: 0; top: 0; bottom: 0;
  background: rgba(255, 200, 0, 0.55);
  box-shadow: 0 0 6px rgba(255, 200, 0, 0.4);
}

.avg-line-label {
  position: absolute;
  top: 50%;
  left: 10px;
  transform: translateY(-50%);
  background: rgba(0, 10, 30, 0.8);
  border: 1px solid rgba(255, 200, 0, 0.5);
  color: var(--color-moderate);
  font-size: 0.68rem;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 5px;
  pointer-events: none;
  white-space: nowrap;
}

/* ===== Prominent Average Display ===== */
.avg-badge {
  display: flex;
  align-items: center;
  gap: 18px;
  background: rgba(0, 0, 0, 0.28);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  padding: 14px 28px;
  width: 100%;
  max-width: 900px;
  position: relative;
  overflow: hidden;
}

.avg-badge::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0,217,255,0.04) 0%, transparent 60%);
  pointer-events: none;
}

.avg-badge-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.avg-badge-content {
  flex: 1;
}

.avg-badge-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-text-muted);
  margin-bottom: 2px;
}

.avg-badge-row {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.avg-badge-value {
  font-size: 2.6rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.avg-badge-unit {
  font-size: 1rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

.avg-badge-sub {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-top: 3px;
}

.avg-target-gap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  flex-shrink: 0;
  gap: 4px;
}

.avg-target-gap-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-muted);
}

.avg-target-gap-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  transition: color 0.3s ease;
}

.gap-under  { color: var(--color-quiet); }
.gap-over   { color: var(--color-loud); }
.gap-on     { color: var(--color-moderate); }

.avg-bar-track {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 3px;
  overflow: hidden;
  margin-top: 8px;
}

.avg-bar-fill {
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-quiet));
  transition: width 0.4s ease;
  max-width: 100%;
}

/* Stats Row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 15px;
  margin-top: 30px;
}

.stat-card {
  background: rgba(0, 0, 0, 0.25);
  padding: 20px 15px;
  border-radius: 16px;
  text-align: center;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.stat-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.stat-icon {
  font-size: 1.5rem;
  margin-bottom: 8px;
}

.stat-value {
  font-size: 2rem;
  font-weight: bold;
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  margin-top: 5px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Controls Panel */
.controls-panel {
  background: rgba(255, 255, 255, 0.05);
  backdrop-filter: blur(10px);
  border-radius: 24px;
  padding: 30px;
  margin-top: 30px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.controls-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 25px;
  flex-wrap: wrap;
  gap: 15px;
}

.controls-header h2 {
  font-size: 1.4rem;
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-group {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.start-btn {
  padding: 14px 35px;
  font-size: 1.05rem;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 10px;
}

.start-btn.inactive {
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  color: var(--color-bg-dark);
}

.start-btn.active {
  background: linear-gradient(135deg, var(--color-loud), #ff6b6b);
  color: white;
}

.start-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 30px rgba(0, 217, 255, 0.3);
}

.reset-btn {
  padding: 14px 25px;
  font-size: 1rem;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  cursor: pointer;
  font-weight: 500;
  background: transparent;
  color: white;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.reset-btn:hover {
  border-color: var(--color-primary);
  background: rgba(0, 217, 255, 0.1);
}

body.theme-light .reset-btn {
  border-color: rgba(0, 0, 0, 0.2);
  color: #1e293b;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.setting-item {
  background: rgba(0, 0, 0, 0.2);
  padding: 20px;
  border-radius: 16px;
  transition: all 0.3s ease;
}

.setting-item:hover {
  background: rgba(0, 0, 0, 0.3);
}

.setting-item label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
  font-size: 0.95rem;
  color: #ccd6f6;
  font-weight: 500;
}

.setting-item input[type="range"] {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--color-bg-dark);
  outline: none;
  -webkit-appearance: none;
}

.setting-item input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  cursor: pointer;
  box-shadow: 0 0 15px rgba(0, 217, 255, 0.5);
  transition: transform 0.2s ease;
}

.setting-item input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.value-display {
  text-align: center;
  font-size: 1.4rem;
  font-weight: bold;
  color: var(--color-primary);
  margin-top: 12px;
}

.threshold-indicators {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* Toggle Switch */
.toggle-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.toggle-switch {
  position: relative;
  width: 56px;
  height: 28px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-bg-dark);
  transition: 0.4s;
  border-radius: 28px;
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 4px;
  background-color: var(--color-text-muted);
  transition: 0.4s;
  border-radius: 50%;
}

.toggle-switch input:checked+.toggle-slider {
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
}

.toggle-switch input:checked+.toggle-slider:before {
  transform: translateX(28px);
  background-color: white;
}

/* History Chart */
.history-section {
  margin-top: 30px;
}

.history-section h3 {
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.1rem;
}

.history-chart {
  width: 100%;
  height: 130px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 16px;
  position: relative;
  overflow: hidden;
}

.history-canvas {
  width: 100%;
  height: 100%;
}

/* Alert Overlay */
.alert-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle, rgba(255, 50, 50, 0.3) 0%, rgba(255, 50, 50, 0.1) 100%);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  z-index: 100;
}

.alert-overlay.active {
  opacity: 1;
  animation: flash 0.4s ease-in-out infinite;
}

@keyframes flash {

  0%,
  100% {
    opacity: 0.3;
  }

  50% {
    opacity: 0.6;
  }
}

/* Permission Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.85);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  padding: 20px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background: linear-gradient(135deg, var(--color-bg-dark), var(--color-bg-mid));
  padding: 40px;
  border-radius: 24px;
  text-align: center;
  max-width: 420px;
  width: 100%;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

.modal-icon {
  font-size: 4rem;
  margin-bottom: 20px;
  display: block;
}

.modal h2 {
  margin-bottom: 15px;
  font-size: 1.5rem;
}

.modal p {
  color: var(--color-text-muted);
  margin-bottom: 25px;
  line-height: 1.6;
}

.modal-btns {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.modal-btn {
  padding: 14px 28px;
  border: none;
  border-radius: 25px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.modal-btn:hover {
  transform: scale(1.05);
}

.modal-btn.primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  color: var(--color-bg-dark);
}

.modal-btn.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Keyboard Shortcuts Modal */
.shortcuts-modal {
  max-width: 480px;
  text-align: left;
}

.shortcuts-modal h2 {
  text-align: center;
  margin-bottom: 20px;
}

.shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
  margin-bottom: 24px;
}

.shortcut-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9rem;
}

.shortcut-row .kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 28px;
  padding: 0 8px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 6px;
  font-family: monospace;
  font-size: 0.85rem;
  font-weight: 700;
  flex-shrink: 0;
}

body.theme-light .shortcut-row .kbd {
  background: rgba(0, 0, 0, 0.08);
  border-color: rgba(0, 0, 0, 0.2);
  color: #1e293b;
}

/* Character counter for custom attention input */
.custom-attention-count {
  font-size: 0.7rem;
  color: var(--color-text-muted);
  text-align: right;
  margin-top: 3px;
  transition: color 0.2s;
}
.custom-attention-count.near-limit { color: var(--color-moderate); }
.custom-attention-count.at-limit { color: var(--color-loud); }

/* Mobile improvements */
@media (max-width: 480px) {
  .modal {
    padding: 28px 20px;
    border-radius: 18px;
    max-width: calc(100vw - 32px);
  }

  .modal-overlay {
    padding: 16px;
  }

  .shortcuts-grid {
    grid-template-columns: 1fr;
  }

  .header-controls {
    gap: 6px;
  }

  .visualizer-container {
    height: 100px;
  }

  .noise-circle-container {
    width: 260px;
    height: 260px;
  }

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

/* Fullscreen Mode */
body.fullscreen {
  overflow: hidden;
}

body.fullscreen .container {
  max-width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px;
}

body.fullscreen header {
  padding: 10px 0;
}

body.fullscreen .controls-panel,
body.fullscreen .stats-row,
body.fullscreen .preset-tabs {
  display: none;
}

body.fullscreen .noise-circle-container {
  width: 450px;
  height: 450px;
}

body.fullscreen .db-value {
  font-size: 7rem;
}

body.fullscreen .status-text {
  font-size: 2.5rem;
}

body.fullscreen .character {
  font-size: 5.5rem;
}

body.fullscreen .visualizer-container {
  max-width: 100%;
  height: 180px;
}

body.fullscreen .ring:nth-child(1) {
  width: 480px;
  height: 480px;
}

body.fullscreen .ring:nth-child(2) {
  width: 530px;
  height: 530px;
}

body.fullscreen .ring:nth-child(3) {
  width: 580px;
  height: 580px;
}

/* SVG Icons */
.icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 1.7rem;
  }

  .noise-circle-container {
    width: 260px;
    height: 260px;
  }

  .ring:nth-child(1) {
    width: 280px;
    height: 280px;
  }

  .ring:nth-child(2) {
    width: 310px;
    height: 310px;
  }

  .ring:nth-child(3) {
    width: 340px;
    height: 340px;
  }

  .db-value {
    font-size: 3.2rem;
  }

  .character {
    font-size: 3rem;
  }

  .controls-panel {
    padding: 20px;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }

  .preset-tab {
    padding: 8px 15px;
    font-size: 0.85rem;
  }

  body.fullscreen .noise-circle-container {
    width: 280px;
    height: 280px;
  }

  body.fullscreen .db-value {
    font-size: 4rem;
  }
}

/* Tooltip */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0, 0, 0, 0.9);
  color: white;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.85rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  pointer-events: none;
  margin-bottom: 8px;
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* Quiet Challenge Timer */
.challenge-section {
  margin-top: 25px;
  padding: 20px;
  background: rgba(0, 255, 136, 0.1);
  border-radius: 16px;
  border: 1px solid rgba(0, 255, 136, 0.2);
  display: none;
}

.challenge-section.active {
  display: block;
}

.challenge-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 15px;
}

.challenge-header h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-quiet);
}

.challenge-timer {
  font-size: 2.5rem;
  font-weight: bold;
  text-align: center;
  color: var(--color-quiet);
}

.challenge-progress {
  width: 100%;
  height: 8px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 4px;
  margin-top: 15px;
  overflow: hidden;
}

.challenge-progress-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--color-quiet), var(--color-primary));
  border-radius: 4px;
  transition: width 0.3s ease;
}

.challenge-btns {
  display: flex;
  gap: 10px;
  margin-top: 15px;
  justify-content: center;
}

.challenge-btn {
  padding: 10px 20px;
  border-radius: 20px;
  border: none;
  cursor: pointer;
  font-weight: 500;
  transition: all 0.2s ease;
}

.challenge-btn.start {
  background: var(--color-quiet);
  color: var(--color-bg-dark);
}

.challenge-btn.cancel {
  background: rgba(255, 255, 255, 0.1);
  color: white;
}

.challenge-duration {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin-bottom: 15px;
}

.duration-option {
  padding: 8px 16px;
  border-radius: 15px;
  border: 1px solid rgba(0, 255, 136, 0.3);
  background: transparent;
  color: var(--color-quiet);
  cursor: pointer;
  transition: all 0.2s ease;
}

.duration-option.selected {
  background: var(--color-quiet);
  color: var(--color-bg-dark);
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  pointer-events: none;
}

.toast {
  padding: 16px 28px;
  border-radius: 16px;
  font-size: 1.1rem;
  font-weight: 600;
  color: white;
  box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  display: flex;
  align-items: center;
  gap: 12px;
  animation: toastIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  max-width: 420px;
  text-align: center;
}

.toast.success {
  background: linear-gradient(135deg, #00c96b, #00d9ff);
  color: var(--color-bg-dark);
}

.toast.fail {
  background: linear-gradient(135deg, #ff3232, #ff6b35);
}

.toast.info {
  background: linear-gradient(135deg, #16213e, #0f3460);
  border: 1px solid rgba(0,217,255,0.3);
}

.toast.fadeout {
  animation: toastOut 0.4s ease forwards;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-20px) scale(0.9); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0) scale(1); }
  to   { opacity: 0; transform: translateY(-16px) scale(0.92); }
}

/* ===== Star Reward System ===== */
.star-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-top: 8px;
  min-height: 32px;
}

.star {
  font-size: 1.5rem;
  opacity: 0.25;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  filter: grayscale(1);
  transform: scale(0.8);
}

.star.earned {
  opacity: 1;
  filter: none;
  transform: scale(1.1);
}

.star.pop {
  animation: starPop 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes starPop {
  0%   { transform: scale(1.1); }
  40%  { transform: scale(1.6); }
  70%  { transform: scale(0.95); }
  100% { transform: scale(1.1); }
}

.quiet-streak-label {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 2px;
  letter-spacing: 0.5px;
}

/* ===== Export / Log ===== */
.export-btn {
  padding: 10px 20px;
  font-size: 0.9rem;
  border: 2px solid rgba(0, 217, 255, 0.35);
  border-radius: 50px;
  cursor: pointer;
  font-weight: 500;
  background: transparent;
  color: var(--color-primary);
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.export-btn:hover {
  background: rgba(0, 217, 255, 0.1);
  border-color: var(--color-primary);
}

body.theme-light .export-btn {
  color: #0284c7;
  border-color: rgba(2, 132, 199, 0.35);
}

/* ===== Log Panel ===== */
.log-section {
  margin-top: 20px;
}

.log-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  flex-wrap: wrap;
  gap: 10px;
}

.log-header h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1rem;
}

.log-list {
  max-height: 160px;
  overflow-y: auto;
  background: rgba(0,0,0,0.2);
  border-radius: 12px;
  padding: 10px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,255,255,0.15) transparent;
}

.log-list::-webkit-scrollbar { width: 5px; }
.log-list::-webkit-scrollbar-track { background: transparent; }
.log-list::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); border-radius: 3px; }

.log-entry {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.82rem;
  color: #a8b3cc;
  padding: 3px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}

.log-entry:last-child { border-bottom: none; }

.log-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.log-dot.quiet   { background: var(--color-quiet); }
.log-dot.moderate { background: var(--color-moderate); }
.log-dot.loud    { background: var(--color-loud); }

.log-time {
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
  min-width: 42px;
}

.log-empty {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 14px;
}

/* ===== Challenge result banner ===== */
.challenge-result {
  text-align: center;
  font-size: 1rem;
  font-weight: 600;
  margin-top: 10px;
  min-height: 24px;
  transition: color 0.3s ease;
}

.challenge-result.success { color: var(--color-quiet); }
.challenge-result.fail    { color: var(--color-loud); }

/* ===== Trend Arrow ===== */
.trend-arrow {
  position: absolute;
  top: 12px;
  right: 14px;
  font-size: 1.4rem;
  font-weight: 900;
  opacity: 0;
  transition: opacity 0.4s ease, color 0.4s ease;
  pointer-events: none;
  z-index: 5;
}
.trend-arrow.visible { opacity: 1; }
.trend-up   { color: var(--color-loud); }
.trend-down { color: var(--color-quiet); }
.trend-flat { color: var(--color-moderate); font-size: 1rem; }

/* ===== Countdown Timer Mode ===== */
.countdown-bar {
  width: 100%;
  max-width: 900px;
  background: rgba(0,0,0,0.28);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 18px 28px;
  display: none;
  align-items: center;
  gap: 20px;
}
.countdown-bar.active { display: flex; }
.countdown-clock {
  font-size: 3rem;
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
  letter-spacing: -1px;
  min-width: 100px;
}
.countdown-clock.urgent { color: var(--color-loud); animation: pulse-loud 0.6s ease-in-out infinite; }
.countdown-content { flex: 1; }
.countdown-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}
.countdown-track {
  width: 100%;
  height: 8px;
  background: rgba(255,255,255,0.08);
  border-radius: 4px;
  overflow: hidden;
}
.countdown-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-quiet));
  transition: width 1s linear;
}
.countdown-end-btn {
  padding: 10px 20px;
  border-radius: 20px;
  border: 1.5px solid rgba(255,255,255,0.2);
  background: transparent;
  color: white;
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  white-space: nowrap;
  transition: all 0.2s ease;
}
.countdown-end-btn:hover { background: rgba(255,255,255,0.1); }

/* Countdown picker in settings */
.countdown-picker {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}
.countdown-chip {
  padding: 7px 14px;
  border-radius: 14px;
  border: 1px solid rgba(0,217,255,0.3);
  background: transparent;
  color: var(--color-primary);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.countdown-chip:hover, .countdown-chip.selected {
  background: rgba(0,217,255,0.15);
  border-color: var(--color-primary);
}
.countdown-start-btn {
  padding: 8px 18px;
  border-radius: 14px;
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  color: var(--color-bg-dark);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  transition: all 0.2s ease;
}
.countdown-start-btn:hover { transform: scale(1.04); }

/* ===== Attention Signal ===== */
.attention-overlay {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: rgba(10, 10, 30, 0.97);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.attention-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.attention-emoji {
  font-size: 8rem;
  animation: attentionBounce 0.6s ease-in-out infinite alternate;
  margin-bottom: 20px;
}
@keyframes attentionBounce {
  from { transform: scale(0.95) translateY(0); }
  to   { transform: scale(1.05) translateY(-10px); }
}
.attention-text {
  font-size: 3.5rem;
  font-weight: 900;
  background: linear-gradient(90deg, var(--color-primary), var(--color-quiet));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-align: center;
  padding: 0 20px;
  margin-bottom: 10px;
}
.attention-sub {
  color: var(--color-text-muted);
  font-size: 1.1rem;
  margin-bottom: 40px;
}
.attention-dismiss {
  padding: 16px 44px;
  border-radius: 50px;
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  color: var(--color-bg-dark);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.2s ease;
}
.attention-dismiss:hover { transform: scale(1.06); }

.proj-btn {
  padding: 10px 16px;
  border-radius: 12px;
  border: 1.5px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.06);
  color: rgba(255,255,255,0.75);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.proj-btn:hover { background: rgba(255,255,255,0.12); color: white; }

/* Attention button in header */
.attention-btn {
  padding: 10px 18px;
  border-radius: 12px;
  border: 1.5px solid rgba(255, 200, 0, 0.4);
  background: rgba(255, 200, 0, 0.08);
  color: var(--color-moderate);
  cursor: pointer;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.attention-btn:hover {
  background: rgba(255, 200, 0, 0.18);
  border-color: var(--color-moderate);
  transform: scale(1.04);
}

/* ===== Session Report Modal ===== */
.report-modal {
  background: linear-gradient(135deg, var(--color-bg-dark), #0a1628);
  padding: 0;
  border-radius: 24px;
  max-width: 520px;
  width: 100%;
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.1);
  transform: scale(0.9) translateY(20px);
  transition: transform 0.3s ease;
}
.modal-overlay.active .report-modal { transform: scale(1) translateY(0); }
.report-header {
  padding: 28px 32px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  gap: 16px;
}
.report-grade {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.2rem;
  font-weight: 900;
  flex-shrink: 0;
}
.grade-a { background: linear-gradient(135deg, #00ff88, #00d9ff); color: #0a1628; }
.grade-b { background: linear-gradient(135deg, #7ed957, #00d9ff); color: #0a1628; }
.grade-c { background: linear-gradient(135deg, #ffc800, #ff9500); color: #0a1628; }
.grade-d { background: linear-gradient(135deg, #ff6b35, #ff3232); color: white; }
.grade-f { background: linear-gradient(135deg, #ff3232, #c0392b); color: white; }
.report-title-block h2 { font-size: 1.4rem; margin-bottom: 4px; }
.report-title-block p { color: var(--color-text-muted); font-size: 0.85rem; }
.report-body { padding: 20px 32px 28px; }
.report-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-bottom: 20px;
}
.report-stat {
  background: rgba(255,255,255,0.04);
  border-radius: 14px;
  padding: 14px 16px;
  border: 1px solid rgba(255,255,255,0.06);
}
.report-stat-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}
.report-stat-value {
  font-size: 1.6rem;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.report-stat-value.good { color: var(--color-quiet); }
.report-stat-value.ok   { color: var(--color-moderate); }
.report-stat-value.bad  { color: var(--color-loud); }
.report-message {
  background: rgba(0,217,255,0.06);
  border: 1px solid rgba(0,217,255,0.15);
  border-radius: 14px;
  padding: 14px 18px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: #ccd6f6;
  margin-bottom: 20px;
}
.report-btns { display: flex; gap: 10px; justify-content: flex-end; flex-wrap: wrap; }
.report-print-btn {
  padding: 11px 22px;
  border-radius: 20px;
  border: 1.5px solid rgba(255,255,255,0.2);
  background: transparent;
  color: white;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
}
.report-print-btn:hover { background: rgba(255,255,255,0.08); }
.report-close-btn {
  padding: 11px 22px;
  border-radius: 20px;
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  color: var(--color-bg-dark);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 700;
  transition: all 0.2s ease;
}
.report-close-btn:hover { transform: scale(1.04); }

/* ===== Fullscreen avg overlay ===== */
.fullscreen-avg {
  display: none;
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 18px;
  padding: 14px 22px;
  z-index: 200;
  flex-direction: column;
  align-items: flex-end;
  gap: 2px;
}
body.fullscreen .fullscreen-avg { display: flex; }
.fs-avg-label { font-size: 0.68rem; text-transform: uppercase; letter-spacing: 1px; color: var(--color-text-muted); }
.fs-avg-value { font-size: 2rem; font-weight: 800; color: var(--color-primary); font-variant-numeric: tabular-nums; }
.fs-avg-gap { font-size: 0.8rem; font-weight: 600; }

/* ===== Settings section for new features ===== */
.session-tools {
  margin-top: 25px;
  padding: 20px;
  background: rgba(0,217,255,0.05);
  border: 1px solid rgba(0,217,255,0.12);
  border-radius: 16px;
}
.session-tools h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
}
.session-tools-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}
@media (max-width: 600px) {
  .session-tools-grid { grid-template-columns: 1fr; }
  .report-stats { grid-template-columns: 1fr; }
  .attention-text { font-size: 2.2rem; }
}
.tool-card {
  background: rgba(0,0,0,0.2);
  border-radius: 14px;
  padding: 16px;
  border: 1px solid rgba(255,255,255,0.05);
}
.tool-card h4 {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: #ccd6f6;
}

@media print {
  body * { visibility: hidden; }
  #reportPrintArea, #reportPrintArea * { visibility: visible; }
  #reportPrintArea {
    position: fixed; inset: 0; padding: 40px;
    background: #fff !important;
    color: #000 !important;
  }
  #reportPrintArea * { color: #000 !important; background: transparent !important; }
  #reportPrintArea canvas { display: none; }
  .modal-close-btn { display: none; }
}

/* ===== Noise Thermometer ===== */
.thermometer-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.thermo-label {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-text-muted);
}
.thermo-tube {
  width: 36px;
  height: 240px;
  background: rgba(0,0,0,0.35);
  border-radius: 18px;
  border: 2px solid rgba(255,255,255,0.1);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}
.thermo-fill {
  width: 100%;
  border-radius: 0 0 18px 18px;
  background: linear-gradient(to top, var(--color-quiet), var(--color-moderate), var(--color-loud));
  transition: height 0.25s ease;
  position: relative;
}
.thermo-fill::after {
  content: '';
  position: absolute;
  top: 0; left: 4px; right: 4px;
  height: 6px;
  background: rgba(255,255,255,0.35);
  border-radius: 3px;
}
.thermo-bulb {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.1);
  background: var(--color-loud);
  flex-shrink: 0;
  box-shadow: 0 0 12px rgba(255,50,50,0.5);
  transition: background 0.4s ease, box-shadow 0.4s ease;
}
.thermo-tick {
  position: absolute;
  right: 0;
  width: 10px;
  height: 1px;
  background: rgba(255,255,255,0.25);
}
.thermo-tick-label {
  position: absolute;
  right: -28px;
  font-size: 0.58rem;
  color: var(--color-text-muted);
  transform: translateY(-50%);
  font-variant-numeric: tabular-nums;
}
.thermo-db-readout {
  font-size: 0.9rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-primary);
}

/* Layout: circle + thermometer side by side */
.circle-thermo-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 28px;
  width: 100%;
}

/* ===== Class Name Banner ===== */
.class-name-banner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 8px;
}
.class-name-display {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  border-bottom: 1.5px dashed rgba(0,217,255,0.3);
  transition: border-color 0.2s ease;
  min-width: 60px;
  text-align: center;
}
.class-name-display:hover { border-color: var(--color-primary); }
.class-name-input {
  font-size: 1.3rem;
  font-weight: 700;
  background: rgba(0,217,255,0.08);
  border: 1.5px solid var(--color-primary);
  border-radius: 10px;
  color: white;
  padding: 4px 14px;
  outline: none;
  text-align: center;
  display: none;
  max-width: 280px;
}
.class-name-hint {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

/* ===== Session History Panel ===== */
.history-panel {
  margin-top: 25px;
  padding: 20px;
  background: rgba(0,0,0,0.2);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
}
.history-panel h3 {
  font-size: 1rem;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
}
.session-history-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.session-history-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: rgba(255,255,255,0.03);
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,0.05);
  font-size: 0.82rem;
}
.shi-grade {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 900;
  flex-shrink: 0;
}
.shi-info { flex: 1; }
.shi-date { color: var(--color-text-muted); font-size: 0.75rem; }
.shi-stats { display: flex; gap: 14px; color: var(--color-text-muted); font-size: 0.75rem; }
.shi-sparkline {
  display: flex;
  align-items: flex-end;
  gap: 2px;
  height: 28px;
  flex-shrink: 0;
}
.shi-bar {
  width: 5px;
  border-radius: 2px;
  background: var(--color-primary);
  opacity: 0.7;
}
.no-history {
  color: var(--color-text-muted);
  font-size: 0.85rem;
  text-align: center;
  padding: 10px;
}

/* ===== Achievement Badges ===== */
.badges-section {
  margin-top: 25px;
  padding: 20px;
  background: rgba(255,200,0,0.04);
  border: 1px solid rgba(255,200,0,0.12);
  border-radius: 16px;
}
.badges-section h3 {
  font-size: 1rem;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-moderate);
}
.badges-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 5px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1.5px solid;
  min-width: 80px;
  transition: all 0.3s ease;
  cursor: default;
}
.badge.locked {
  border-color: rgba(255,255,255,0.08);
  background: rgba(255,255,255,0.02);
  opacity: 0.4;
  filter: grayscale(1);
}
.badge.unlocked {
  border-color: rgba(255,200,0,0.4);
  background: rgba(255,200,0,0.06);
  box-shadow: 0 0 14px rgba(255,200,0,0.15);
}
.badge.unlocked:hover { transform: translateY(-2px); box-shadow: 0 4px 20px rgba(255,200,0,0.25); }
.badge-icon { font-size: 1.8rem; }
.badge-name { font-size: 0.65rem; text-transform: uppercase; letter-spacing: 0.5px; color: var(--color-text-muted); text-align: center; }

/* Badge unlock toast */
.toast.badge {
  background: linear-gradient(135deg, #7b2ff7, #e040fb);
  border: 1px solid rgba(255,255,255,0.2);
}

/* ===== Custom Attention Message ===== */
.custom-attention-row {
  display: flex;
  gap: 8px;
  margin-top: 10px;
}
.custom-attention-input {
  flex: 1;
  background: rgba(0,0,0,0.25);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  color: white;
  padding: 7px 12px;
  font-size: 0.85rem;
  outline: none;
}
.custom-attention-input:focus { border-color: var(--color-primary); }
.custom-attention-send {
  padding: 7px 14px;
  border-radius: 10px;
  border: none;
  background: linear-gradient(135deg, var(--color-primary), var(--color-quiet));
  color: var(--color-bg-dark);
  font-weight: 700;
  font-size: 0.82rem;
  cursor: pointer;
  white-space: nowrap;
}

/* ===== Fullscreen enhancements ===== */
.fs-class-name {
  display: none;
  font-size: 1.4rem;
  font-weight: 700;
  color: rgba(255,255,255,0.6);
  text-align: center;
  margin-bottom: 8px;
}
body.fullscreen .fs-class-name { display: block; }
body.fullscreen .class-name-banner { display: none; }
body.fullscreen .thermometer-wrap { display: none; } /* less clutter in fullscreen */
body.fullscreen .avg-badge { display: none; }
body.fullscreen .countdown-bar.active {
  max-width: 600px;
  margin: 0 auto;
}

/* ===== Ambient colour mode ===== */
body.ambient {
  transition: background 1s ease;
}
body.ambient.ambient-quiet {
  background: linear-gradient(135deg, #0a2e1a 0%, #0d3b22 50%, #0f4429 100%);
}
body.ambient.ambient-moderate {
  background: linear-gradient(135deg, #2e1f00 0%, #3b2800 50%, #44300a 100%);
}
body.ambient.ambient-loud {
  background: linear-gradient(135deg, #2e0a0a 0%, #3b0d0d 50%, #440f0f 100%);
}

/* Ambient in projector/presentation mode */
.projector-overlay {
  transition: background 1s ease;
}
.projector-overlay.ambient-quiet {
  background: linear-gradient(135deg, #071f10 0%, #0a2918 50%, #0d3320 100%);
}
.projector-overlay.ambient-moderate {
  background: linear-gradient(135deg, #1e1400 0%, #2a1c00 50%, #332208 100%);
}
.projector-overlay.ambient-loud {
  background: linear-gradient(135deg, #1e0505 0%, #2a0808 50%, #330b0b 100%);
}

/* Ambient toggle in header */
.ambient-btn {
  padding: 10px 14px;
  border-radius: 12px;
  border: 1.5px solid rgba(255,255,255,0.15);
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 600;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.ambient-btn.on {
  border-color: var(--color-quiet);
  color: var(--color-quiet);
  background: rgba(0,255,136,0.08);
}
.ambient-btn:hover { background: rgba(255,255,255,0.1); }

/* ===== Projector eye blink ===== */
@keyframes eyeBlink {
  0%, 92%, 100% { transform: scaleY(1); }
  95%            { transform: scaleY(0.08); }
}
.proj-creature-body.quiet .proj-eye {
  animation: eyeBlink 3.5s ease-in-out infinite;
}

/* ===== avg-badge responsive (iPad / narrow) ===== */
@media (max-width: 600px) {
  .avg-badge {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}

/* ===== Thermometer labels — hide on mobile to prevent overlap ===== */
@media (max-width: 480px) {
  .thermo-tick-label { display: none; }
}

/* ==================== Creature Gauge ==================== */
.legacy-hidden { display: none !important; }
.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;
}
.gauge-wrap {
  width: 100%;
  border-radius: 28px;
  overflow: hidden;
  background: radial-gradient(circle at 50% 50%, #1a2233, #0c111c);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .35), inset 0 0 0 1px rgba(255, 255, 255, .06);
  margin-bottom: 1.5rem;
}
.gauge-canvas {
  display: block;
  width: 100%;
  height: clamp(320px, 62vh, 560px);
}
.projector-overlay.active { padding-top: 64px; }
.proj-gauge-canvas {
  display: block;
  width: 100%;
  border-radius: 24px;
  flex: 1 1 auto;
  min-height: 0;
  height: 70vh;
}
@media (max-width: 480px) {
  .gauge-wrap { border-radius: 18px; }
  .gauge-canvas { height: clamp(300px, 90vw, 420px); }
}

/* ==================== Lesson Timeline ==================== */
.timeline-card {
  position: relative;
  margin: 0 0 1.5rem;
  padding: 14px;
  border-radius: 24px;
  background: linear-gradient(180deg, #151b2b, #0a0e18);
  box-shadow: 0 20px 60px rgba(0, 0, 0, .35), inset 0 0 0 1px rgba(255, 255, 255, .06);
  color: #e8edf7;
}
.timeline-toolbar {
  display: flex; flex-wrap: wrap; align-items: center; gap: 10px;
  margin-bottom: 10px;
}
.timeline-toolbar h3 {
  margin: 0 auto 0 4px;
  font-family: 'VT323', ui-monospace, monospace;
  font-size: 1.6rem; font-weight: 400; letter-spacing: 1px;
  color: #ffd27a;
  text-shadow: 0 0 10px rgba(255, 176, 40, .45);
}
.tl-seg, .tl-actions { display: flex; flex-wrap: wrap; gap: 6px; }
.tl-seg { padding: 3px; border-radius: 12px; background: rgba(255, 255, 255, .05); }
.tl-btn, .proj-faces {
  font: 600 .8rem/1 'JetBrains Mono', ui-monospace, monospace;
  padding: 8px 12px;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, .12);
  background: rgba(255, 255, 255, .05);
  color: rgba(232, 237, 247, .8);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.tl-seg .tl-btn { border-color: transparent; background: transparent; }
.tl-btn:hover, .proj-faces:hover { background: rgba(255, 255, 255, .12); color: #fff; }
.tl-btn.active {
  background: #ffb020; color: #1a1206; border-color: #ffb020;
  box-shadow: 0 0 12px rgba(255, 176, 32, .45);
}
.tl-btn:focus-visible, .proj-faces:focus-visible { outline: 2px solid #ffd27a; outline-offset: 2px; }
.timeline-stage { position: relative; }
.timeline-canvas {
  display: block; width: 100%;
  height: clamp(260px, 44vh, 460px);
  border-radius: 14px;
  background: #06080f;
  cursor: crosshair;
}
.tl-tooltip {
  position: absolute; z-index: 5; pointer-events: none;
  padding: 8px 10px; border-radius: 8px;
  font: 500 .8rem/1.45 'JetBrains Mono', ui-monospace, monospace;
  background: rgba(8, 11, 20, .94); color: #e8edf7;
  border: 1px solid rgba(255, 255, 255, .15);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .4);
  white-space: nowrap;
}
.tl-tip-zone { color: var(--z); font-weight: 700; }
.timeline-note { margin: 10px 4px 0; font-size: .8rem; color: rgba(232, 237, 247, .5); }

/* Full screen (native, or the fixed-overlay fallback) */
.timeline-card:fullscreen, .timeline-card.tl-fullscreen {
  display: flex; flex-direction: column;
  width: 100vw; height: 100vh; margin: 0; border-radius: 0; padding: 12px 16px;
  background: #06080f;
}
.timeline-card.tl-fullscreen { position: fixed; inset: 0; z-index: 9000; }
.timeline-card:fullscreen .timeline-stage, .timeline-card.tl-fullscreen .timeline-stage { flex: 1 1 auto; min-height: 0; }
.timeline-card:fullscreen .timeline-canvas, .timeline-card.tl-fullscreen .timeline-canvas { height: 100%; border-radius: 10px; }
.timeline-card:fullscreen .timeline-note, .timeline-card.tl-fullscreen .timeline-note { display: none; }

.proj-faces { position: fixed; top: 18px; right: 130px; z-index: 8001; border-radius: 16px; }

@media (max-width: 600px) {
  .timeline-card { padding: 10px; border-radius: 18px; }
  .timeline-toolbar h3 { flex-basis: 100%; }
  .tl-btn { padding: 7px 9px; font-size: .72rem; }
  .timeline-canvas { height: 300px; }
}