/* ==========================================================================
   Pi Living Odyssey — Interactive Narrative Design System
   Aesthetics: Deep Obsidian Slate, Warm Amber Gold, Emerald & Cyan Highlights
   Performance: Hardware Accelerated (translate3d, contain: layout style)
   ========================================================================== */

html, body {
  overflow-x: hidden;
  max-width: 100vw;
}

.story-container {
  max-width: 1160px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px 80px;
  box-sizing: border-box;
}

/* Hero Section */
.story-hero {
  text-align: center;
  padding: 36px 16px 44px;
  position: relative;
  overflow: hidden;
}

.story-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent-soft);
  border: 1px solid rgba(245, 158, 11, 0.35);
  color: var(--accent-light);
  padding: 6px 18px;
  border-radius: var(--radius-full);
  font-size: 12.5px;
  font-weight: 800;
  margin-bottom: 20px;
  box-shadow: 0 0 20px rgba(245, 158, 11, 0.15);
}

.story-hero-title {
  font-size: clamp(1.8rem, 4.8vw, 3.2rem);
  font-weight: 900;
  letter-spacing: -0.025em;
  margin-bottom: 14px;
  line-height: 1.3;
  background: linear-gradient(135deg, #ffffff 10%, #fef08a 45%, #f59e0b 80%, #fbbf24 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.story-hero-sub {
  font-size: clamp(0.95rem, 2.2vw, 1.2rem);
  color: var(--ink-secondary);
  max-width: 780px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

/* Quick Chapter Navigation Bar */
.story-quick-nav {
  display: flex;
  gap: 8px;
  justify-content: center;
  flex-wrap: wrap;
  margin: 0 auto 40px;
  max-width: 980px;
  padding: 0 4px;
}

.story-nav-chip {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-secondary);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: transform var(--duration-quick) var(--ease-spring), background 0.2s, border-color 0.2s;
  cursor: pointer;
  white-space: nowrap;
}

.story-nav-chip:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(245, 158, 11, 0.4);
  transform: translateY(-2px);
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.2);
}

/* ==========================================================================
   STORY ACT SECTIONS & HARDWARE-ACCELERATED CARDS
   ========================================================================== */
.story-act-section {
  margin-bottom: 44px;
}

.story-act-card {
  background: linear-gradient(180deg, rgba(20, 25, 38, 0.82) 0%, rgba(13, 17, 26, 0.94) 100%);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3.5vw, 36px);
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 45px rgba(0, 0, 0, 0.5),
              inset 0 1px 1.5px rgba(255, 255, 255, 0.35);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  transform: translate3d(0, 0, 0);
  contain: layout style;
}

.act-header {
  margin-bottom: 24px;
}

.act-tag-row {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.act-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 800;
  background: var(--accent-soft);
  color: var(--accent);
  border: 1px solid rgba(245, 158, 11, 0.3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.act-badge.gold {
  background: rgba(245, 158, 11, 0.2);
  color: #fef08a;
  border-color: rgba(245, 158, 11, 0.5);
}

.act-year {
  font-size: 12px;
  font-weight: 700;
  color: var(--ink-tertiary);
  font-family: 'JetBrains Mono', monospace;
}

.act-year.gold {
  color: var(--accent-light);
}

.act-title {
  font-size: clamp(1.3rem, 2.8vw, 1.85rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  line-height: 1.35;
}

.act-narrative {
  font-size: clamp(0.92rem, 1.8vw, 1.04rem);
  color: var(--ink-secondary);
  line-height: 1.85;
  max-width: 960px;
}

.act-narrative b {
  color: var(--ink);
}

/* ==========================================================================
   ACT WORKSPACE: CANVAS + CONTROL PANEL
   ========================================================================== */
.act-workspace {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 24px;
  align-items: start;
  margin-top: 24px;
}

@media (max-width: 980px) {
  .act-workspace {
    grid-template-columns: 1fr;
  }
}

.act-canvas-box {
  background: #080a0f;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.85);
}

.act-canvas-box canvas {
  display: block;
  width: 100%;
  height: auto;
  max-height: 380px;
}

.canvas-caption {
  padding: 8px 14px;
  font-size: 11.5px;
  color: var(--ink-tertiary);
  text-align: center;
  background: rgba(0, 0, 0, 0.4);
  width: 100%;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.act-control-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
  background: rgba(10, 13, 20, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 20px;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.control-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.control-value {
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-weight: 800;
  direction: ltr;
}

/* Custom Styled Range Sliders */
.lab-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.12);
  outline: none;
  cursor: pointer;
}

.lab-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.6);
  cursor: pointer;
  transition: transform 0.15s ease, background 0.15s ease;
}

.lab-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  background: var(--accent-light);
}

.act-btn-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 6px;
}

.act-btn {
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ==========================================================================
   THE FORMULA SPOTLIGHT (ACT 1)
   ========================================================================== */
.formula-spotlight {
  background: linear-gradient(135deg, rgba(35, 28, 15, 0.8) 0%, rgba(18, 16, 25, 0.9) 100%);
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-top: 6px;
}

.formula-spotlight-title {
  font-size: 11.5px;
  font-weight: 800;
  color: var(--accent-light);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.formula-equation {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
  color: var(--ink);
  direction: ltr;
  unicode-bidi: embed;
  margin-bottom: 10px;
}

.eq-div, .eq-equal {
  color: var(--accent);
  font-weight: 900;
  font-size: 16px;
}

.eq-result {
  color: #10b981;
  font-size: 17px;
  font-weight: 900;
  text-shadow: 0 0 12px rgba(16, 185, 129, 0.5);
}

.formula-note {
  font-size: 11.5px;
  color: var(--ink-secondary);
  line-height: 1.65;
  margin: 0;
}

/* Act Stats Grid */
.act-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.act-stat-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.act-stat-box.full-width {
  grid-column: span 2;
}

.stat-lbl {
  font-size: 11px;
  color: var(--ink-tertiary);
  font-weight: 700;
}

.stat-val {
  font-size: 15px;
  font-weight: 900;
  color: var(--ink);
  font-family: 'JetBrains Mono', monospace;
  direction: ltr;
}

.stat-val.emerald { color: #10b981; }
.stat-val.amber { color: #fbbf24; }
.stat-val.cyan { color: #38bdf8; }
.stat-val.highlight { color: var(--accent); }

.archimedes-quote-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 11.5px;
  color: var(--ink-secondary);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.archimedes-quote-box code {
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-size: 12.5px;
  direction: ltr;
  unicode-bidi: embed;
}

/* ==========================================================================
   ACT 3: KASHANI MACHINE STYLING
   ========================================================================== */
.kashani-workspace {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 20px;
}

.kashani-stepper-panel {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  padding: 16px 20px;
}

.kashani-stepper-title {
  font-size: 13px;
  font-weight: 800;
  color: var(--accent-light);
  margin-bottom: 12px;
}

.kashani-steps-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.kashani-step-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.kashani-step-btn:hover {
  border-color: var(--accent);
  color: var(--ink);
}

.kashani-step-btn.active {
  background: var(--accent);
  color: #000;
  font-weight: 900;
  border-color: var(--accent);
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.5);
}

.kashani-results-box {
  background: linear-gradient(180deg, rgba(25, 22, 18, 0.9) 0%, rgba(12, 14, 20, 0.95) 100%);
  border: 1px solid rgba(245, 158, 11, 0.4);
  border-radius: var(--radius-md);
  padding: 24px;
}

.kashani-metric-row {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
  font-size: 14px;
  font-weight: 800;
}

.metric-lbl { color: var(--ink-secondary); }
.metric-val.gold { color: #fef08a; font-family: 'JetBrains Mono', monospace; }
.metric-tag {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
}

.kashani-digits-container {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 22px;
  direction: ltr;
  unicode-bidi: embed;
}

.kashani-digit {
  width: 38px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 22px;
  font-weight: 900;
  transition: all 0.25s ease;
}

.kashani-digit.active {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.25), rgba(217, 119, 6, 0.35));
  border: 1.5px solid rgba(245, 158, 11, 0.8);
  color: #fef08a;
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.4);
}

.kashani-digit.dim {
  background: rgba(0, 0, 0, 0.3);
  border: 1px dashed rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.15);
}

.kashani-quote {
  border-right: 3px solid var(--accent);
  padding-right: 14px;
  font-size: 12.5px;
  color: var(--ink-secondary);
  line-height: 1.8;
}

/* ==========================================================================
   ACT 4 & 5 INSIGHT BOXES & NASA CONTROLS
   ========================================================================== */
.sound-insight-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 11.5px;
  color: var(--ink-secondary);
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1.6;
}

.sound-toggle-active {
  background: linear-gradient(135deg, #10b981, #059669) !important;
  color: #fff !important;
  box-shadow: 0 0 16px rgba(16, 185, 129, 0.4);
}

.nasa-box {
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.nasa-box-title {
  font-size: 12.5px;
  font-weight: 800;
  color: var(--accent-light);
}

.lab-select {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  outline: none;
  cursor: pointer;
}

.nasa-result-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: var(--ink-secondary);
}

.error-pill {
  padding: 5px 12px;
  border-radius: var(--radius-sm);
  font-size: 12.5px;
  font-weight: 800;
  font-family: 'JetBrains Mono', monospace;
  direction: ltr;
}

.error-pill.good {
  background: rgba(16, 185, 129, 0.15);
  color: #34d399;
  border: 1px solid rgba(16, 185, 129, 0.35);
}

.error-pill.warn {
  background: rgba(245, 158, 11, 0.15);
  color: #fbbf24;
  border: 1px solid rgba(245, 158, 11, 0.35);
}

.error-pill.bad {
  background: rgba(239, 68, 68, 0.15);
  color: #f87171;
  border: 1px solid rgba(239, 68, 68, 0.35);
}

/* ==========================================================================
   RESPONSIVE MEDIA QUERIES (390PX & MOBILE)
   ========================================================================== */
@media (max-width: 640px) {
  .story-container {
    padding: 12px 10px 60px;
  }
  .story-hero {
    padding: 20px 8px 24px;
  }
  .story-hero-title {
    font-size: 1.55rem;
    line-height: 1.35;
  }
  .story-quick-nav {
    gap: 6px;
    margin-bottom: 24px;
    padding: 0 2px;
  }
  .story-nav-chip {
    padding: 6px 10px;
    font-size: 11px;
  }
  .story-act-card {
    padding: 16px 12px;
    box-sizing: border-box;
  }
  .act-title {
    font-size: 1.25rem;
  }
  .act-control-panel {
    padding: 14px 10px;
    box-sizing: border-box;
  }
  .act-canvas-box {
    min-height: 220px;
  }
  .formula-equation {
    font-size: 11.5px;
    gap: 5px;
  }
  .kashani-digit {
    width: 28px;
    height: 38px;
    font-size: 16px;
  }
  .act-btn-row {
    flex-direction: column;
    width: 100%;
  }
  .act-btn {
    width: 100%;
    justify-content: center;
  }
}

/* ==========================================================================
   SCROLL ENTRANCE ANIMATIONS & REVEAL ENGINE
   ========================================================================== */
.story-act-section.reveal-on-scroll {
  opacity: 0;
  transform: translateY(50px) scale(0.985);
  transition: opacity 0.85s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.85s cubic-bezier(0.16, 1, 0.3, 1),
              box-shadow 0.85s ease;
  will-change: opacity, transform;
}

.story-act-section.reveal-on-scroll.is-revealed {
  opacity: 1;
  transform: translateY(0) scale(1);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6),
              0 0 40px rgba(245, 158, 11, 0.08);
}

/* Staggered Children Animations inside Cards */
.reveal-on-scroll .stagger-1,
.reveal-on-scroll .stagger-2,
.reveal-on-scroll .stagger-3,
.reveal-on-scroll .stagger-4 {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal-on-scroll.is-revealed .stagger-1 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.05s;
}

.reveal-on-scroll.is-revealed .stagger-2 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.16s;
}

.reveal-on-scroll.is-revealed .stagger-3 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.28s;
}

.reveal-on-scroll.is-revealed .stagger-4 {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.40s;
}

/* Active Quick Navigation Pill */
.story-nav-chip.active {
  background: rgba(245, 158, 11, 0.22) !important;
  color: #fef08a !important;
  border-color: rgba(245, 158, 11, 0.6) !important;
  box-shadow: 0 0 16px rgba(245, 158, 11, 0.35);
  transform: translateY(-2px);
}

/* ==========================================================================
   NARRATIVE CARDS GRID & DEEP-DIVE MINI-CARDS
   ========================================================================== */
.narrative-cards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 18px 0 24px;
}

@media (max-width: 880px) {
  .narrative-cards-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

.narrative-mini-card {
  background: rgba(15, 23, 42, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  position: relative;
  transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
}

.narrative-mini-card:hover {
  border-color: rgba(245, 158, 11, 0.4);
  transform: translateY(-3px);
  box-shadow: 0 8px 26px rgba(245, 158, 11, 0.12);
}

.mini-card-icon {
  font-size: 22px;
  margin-bottom: 8px;
  display: inline-block;
  filter: drop-shadow(0 0 8px rgba(245, 158, 11, 0.3));
}

.mini-card-title {
  font-size: 13.5px;
  font-weight: 800;
  color: #fbbf24;
  margin-bottom: 6px;
  line-height: 1.4;
}

.mini-card-text {
  font-size: 12px;
  color: var(--ink-secondary);
  line-height: 1.75;
  margin: 0;
}

/* ==========================================================================
   ARCHIMEDES HISTORICAL STEPPER
   ========================================================================== */
.archimedes-stepper-box {
  background: rgba(10, 13, 20, 0.75);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 16px;
}

.archimedes-stepper-title {
  font-size: 12px;
  font-weight: 800;
  color: var(--accent-light);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.archimedes-stepper-btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

.archimedes-step-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.archimedes-step-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(245, 158, 11, 0.4);
}

.archimedes-step-btn.active {
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.35), rgba(217, 119, 6, 0.45));
  color: #fef08a;
  border-color: rgba(245, 158, 11, 0.7);
  box-shadow: 0 0 14px rgba(245, 158, 11, 0.35);
}

.archimedes-step-story {
  margin-top: 10px;
  padding: 10px 12px;
  background: rgba(0, 0, 0, 0.45);
  border-radius: var(--radius-sm);
  border-right: 3px solid var(--accent);
  font-size: 11.5px;
  color: var(--ink-secondary);
  line-height: 1.7;
}

[dir="ltr"] .archimedes-step-story {
  border-right: none;
  border-left: 3px solid var(--accent);
}

/* ==========================================================================
   ACT 4: SOUND PRESETS & REAL-WORLD TECH TABS
   ========================================================================== */
.sound-presets-box {
  background: rgba(10, 13, 20, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  padding: 12px;
  margin-bottom: 12px;
}

.sound-presets-row {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.sound-preset-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--ink-secondary);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sound-preset-btn:hover {
  background: var(--accent-soft);
  color: var(--accent);
  border-color: rgba(245, 158, 11, 0.4);
}

.sound-preset-btn.active {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.3), rgba(5, 150, 105, 0.4));
  color: #6ee7b7;
  border-color: rgba(16, 185, 129, 0.7);
  box-shadow: 0 0 12px rgba(16, 185, 129, 0.3);
}

.sound-tech-tabs {
  background: rgba(10, 13, 20, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  padding: 14px;
  margin-top: 18px;
}

.sound-tech-tab-btns {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.sound-tech-tab-btn {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--ink-secondary);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 11.5px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
}

.sound-tech-tab-btn:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.sound-tech-tab-btn.active {
  background: rgba(56, 189, 248, 0.25);
  color: #7dd3fc;
  border-color: rgba(56, 189, 248, 0.55);
  box-shadow: 0 0 12px rgba(56, 189, 248, 0.2);
}

.sound-tech-tab-content {
  font-size: 12px;
  color: var(--ink-secondary);
  line-height: 1.8;
  padding: 6px 4px 2px;
  min-height: 48px;
}

/* Refined Mobile Safeguards */
@media (max-width: 640px) {
  .archimedes-quote-box code {
    font-size: 11px !important;
    word-break: break-all;
    white-space: normal;
  }
  .narrative-mini-card {
    padding: 14px;
  }
  .archimedes-step-btn {
    font-size: 11px;
    padding: 5px 10px;
  }
  .sound-preset-btn {
    font-size: 11px;
    padding: 4px 10px;
  }
  .sound-tech-tab-btn {
    font-size: 10.5px;
    padding: 5px 9px;
  }
}