/* ==========================================================================
   TERAVIBE.CZ - MODERN PROCEDURAL & GLASSMORPHISM STYLESHEET
   Motto: Smart Solutions with VibeCoding
   ========================================================================== */

:root {
  /* Color Tokens - Default Deep Cyan */
  --bg-radial-center: #08111e;
  --bg-radial-edge: #010205;
  --color-primary: #38bdf8;
  --color-secondary: #67e8f9;
  --color-accent: #c084fc;
  --color-glow: rgba(56, 189, 248, 0.45);
  --color-glow-secondary: rgba(192, 132, 252, 0.35);

  --glass-bg: rgba(8, 17, 30, 0.45);
  --glass-border: rgba(56, 189, 248, 0.22);
  --glass-border-hover: rgba(103, 232, 249, 0.6);
  --glass-shadow: 0 20px 50px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);

  --text-main: #f0f6fc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;

  --font-display: 'Syne', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-code: 'Space Grotesk', monospace;

  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Theme: Cyber Violet */
body.theme-violet {
  --bg-radial-center: #100826;
  --bg-radial-edge: #020108;
  --color-primary: #c084fc;
  --color-secondary: #e879f9;
  --color-accent: #818cf8;
  --color-glow: rgba(192, 132, 252, 0.45);
  --color-glow-secondary: rgba(129, 140, 248, 0.35);
  --glass-bg: rgba(16, 8, 38, 0.45);
  --glass-border: rgba(192, 132, 252, 0.25);
  --glass-border-hover: rgba(232, 121, 249, 0.6);
}

/* Theme: Emerald Glow */
body.theme-emerald {
  --bg-radial-center: #031c17;
  --bg-radial-edge: #000605;
  --color-primary: #34d399;
  --color-secondary: #6ee7b7;
  --color-accent: #38bdf8;
  --color-glow: rgba(52, 211, 153, 0.45);
  --color-glow-secondary: rgba(56, 189, 248, 0.35);
  --glass-bg: rgba(3, 28, 23, 0.45);
  --glass-border: rgba(52, 211, 153, 0.25);
  --glass-border-hover: rgba(110, 231, 183, 0.6);
}

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

html {
  width: 100%;
  min-height: 100%;
  overflow-x: hidden;
  overflow-y: auto;
  scroll-behavior: smooth;
}

body {
  width: 100%;
  min-height: 100vh;
  overflow-x: hidden;
  background-color: var(--bg-radial-edge);
  color: var(--text-main);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: background-color 0.8s ease;
}

/* Custom sleek oceanic scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-radial-edge);
}
::-webkit-scrollbar-thumb {
  background: rgba(56, 189, 248, 0.25);
  border-radius: 4px;
  border: 2px solid var(--bg-radial-edge);
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(56, 189, 248, 0.55);
}

/* Screen reader only */
.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;
}

/* Interactive Canvas Background */
#vibe-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  display: block;
  pointer-events: auto; /* Canvas receives clicks & touch */
}

/* Main Content Wrapper (Floats over canvas) */
.content-wrapper {
  position: relative;
  z-index: 2;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 100vh;
  padding: 68px 24px 20px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
  pointer-events: none; /* Allows clicks to reach canvas by default */
}

/* Interactive elements re-enable pointer-events */
.site-header,
.glass-card,
.hero-badge-tag,
.site-footer,
button, a {
  pointer-events: auto;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 16px 24px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  background: rgba(3, 7, 18, 0.4);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition-smooth);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  flex-shrink: 0;
}

.brand-pulse-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 12px var(--color-primary), 0 0 24px var(--color-glow);
  animation: pulseDot 2s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 18px var(--color-secondary); }
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #fff;
}

.brand-tld {
  color: var(--color-primary);
  text-shadow: 0 0 10px var(--color-glow);
  transition: color 0.4s ease;
}

/* Header Controls */
.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  flex-wrap: nowrap;
}

/* Theme Switcher */
.theme-selector-wrap {
  display: flex;
  align-items: center;
  gap: 4px;
  background: rgba(255, 255, 255, 0.04);
  padding: 3px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.theme-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  background: transparent;
  border: none;
  border-radius: 9999px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-smooth);
}

.theme-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.theme-btn.active {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.color-preview {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.color-preview.cyan {
  background: #38bdf8;
  box-shadow: 0 0 6px #38bdf8;
}

.color-preview.violet {
  background: #c084fc;
  box-shadow: 0 0 6px #c084fc;
}

.color-preview.emerald {
  background: #34d399;
  box-shadow: 0 0 6px #34d399;
}

/* Universal Control Buttons */
.mobile-only {
  display: inline-flex;
}

@media (min-width: 901px) {
  .mobile-only {
    display: none;
  }
}

.control-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 500;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: var(--transition-smooth);
}

.control-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary);
  box-shadow: 0 0 15px var(--color-glow);
  transform: translateY(-1px);
}

.control-btn:active {
  transform: translateY(0);
}

.control-btn.icon-only {
  padding: 7px;
  border-radius: 50%;
}

.control-btn .icon {
  width: 16px;
  height: 16px;
}

/* Audio Waves Indicator */
.audio-waves {
  display: inline-flex;
  align-items: flex-end;
  gap: 2px;
  height: 12px;
}

.audio-waves i {
  display: block;
  width: 2px;
  height: 3px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: height 0.2s ease;
}

.control-btn.playing .audio-waves i:nth-child(1) { animation: wave 1s infinite 0.1s; }
.control-btn.playing .audio-waves i:nth-child(2) { animation: wave 1s infinite 0.3s; }
.control-btn.playing .audio-waves i:nth-child(3) { animation: wave 1s infinite 0.2s; }
.control-btn.playing .audio-waves i:nth-child(4) { animation: wave 1s infinite 0.4s; }

@keyframes wave {
  0%, 100% { height: 3px; }
  50% { height: 12px; }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 16px 16px 6px;
  margin: 0 auto;
  max-width: 900px;
  position: relative;
}

.hero-badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--glass-border);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  margin-bottom: 12px;
  opacity: 0;
  transform: translateY(-10px);
  animation: fadeInDown 0.8s 0.3s forwards ease;
}

.badge-spark {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-secondary);
  box-shadow: 0 0 8px var(--color-secondary);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5.5vw, 4.4rem);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 8px;
  position: relative;
  opacity: 0;
  transform: scale(0.96);
  animation: fadeInScale 1s 0.5s forwards cubic-bezier(0.16, 1, 0.3, 1);
}

.title-text {
  background: linear-gradient(135deg, #ffffff 30%, var(--color-primary) 70%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
  filter: drop-shadow(0 0 35px var(--color-glow));
  transition: filter 0.4s ease;
}

.hero-title:hover .title-text {
  filter: drop-shadow(0 0 50px var(--color-secondary));
}

/* Písmenková světelná vlna zleva doprava */
.wave-letter {
  display: inline-block;
  transition: transform 0.3s ease, filter 0.3s ease;
}

/* Aktivováno v úsporném režimu (při nízkém FPS pod 40) */
body.mode-lowpower .title-text {
  filter: none;
}

body.mode-lowpower .wave-letter {
  display: inline-block;
  color: #ffffff;
  -webkit-text-fill-color: #ffffff;
  animation: letterWaveLight 2.0s infinite ease-in-out;
  animation-delay: calc(var(--i) * 0.14s);
}

@keyframes letterWaveLight {
  0%, 100% {
    color: rgba(255, 255, 255, 0.40);
    -webkit-text-fill-color: rgba(255, 255, 255, 0.40);
    text-shadow: 0 0 4px var(--color-glow);
    transform: translateY(0) scale(1);
  }
  30%, 50% {
    color: #ffffff;
    -webkit-text-fill-color: #ffffff;
    text-shadow: 0 0 16px var(--color-primary), 0 0 32px var(--color-secondary), 0 0 45px #ffffff;
    transform: translateY(-5px) scale(1.12);
  }
}

/* V úsporném režimu zcela skryjeme Canvas pro 0% zátěž GPU a RAM */
body.mode-lowpower #vibe-canvas {
  display: none !important;
}

body.mode-lowpower {
  background: radial-gradient(ellipse at 50% 30%, var(--bg-radial-center) 0%, var(--bg-radial-edge) 85%) !important;
}

.hero-subtitle {
  font-family: var(--font-code);
  font-size: clamp(0.9rem, 2vw, 1.25rem);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--color-secondary);
  text-shadow: 0 0 20px var(--color-glow);
  margin-bottom: 12px;
  opacity: 0;
  transform: translateY(10px);
  animation: fadeInUp 0.8s 0.8s forwards ease;
}

.hero-description {
  max-width: 660px;
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-muted);
  margin-bottom: 0;
  opacity: 0;
  transform: translateY(10px);
  animation: fadeInUp 0.8s 1s forwards ease;
}

/* Open swim corridor for jellyfish - directly under hero text */
.swim-arena-spacer {
  width: 100%;
  height: clamp(75px, 15vh, 180px);
  pointer-events: none;
}

/* ==========================================================================
   Glassmorphism Cards Section
   ========================================================================== */
.cards-section {
  padding: 10px 0 35px;
  width: 100%;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 24px;
  perspective: 1200px;
}

/* Glass Card - High Performance Frosted Glass */
.glass-card {
  position: relative;
  background: rgba(8, 17, 30, 0.88);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border);
  border-radius: 20px;
  padding: 24px 22px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.65), inset 0 1px 0 rgba(255, 255, 255, 0.12);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  align-self: start;
  cursor: pointer;
  outline: none;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), 
              border-color 0.4s ease, 
              box-shadow 0.4s ease,
              background 0.4s ease;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  animation: cardEntrance 0.8s 1.3s forwards cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}

/* Tablet & Mobile High-Performance Mode (zero backdrop blur to save GPU) */
@media (max-width: 900px), (pointer: coarse) {
  .site-header {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: rgba(4, 9, 18, 0.95) !important;
  }
  .glass-card {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: rgba(8, 17, 30, 0.94) !important;
  }
}

.glass-card:focus-visible {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-glow);
}

.glass-card:nth-child(2) { animation-delay: 1.45s; }
.glass-card:nth-child(3) { animation-delay: 1.6s; }

.glass-card:hover {
  border-color: var(--glass-border-hover);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.6), 
              0 0 30px var(--color-glow),
              inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

/* Expanded Card State */
.glass-card.is-expanded {
  border-color: var(--color-primary);
  background: rgba(8, 17, 30, 0.88);
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.85), 
              0 0 40px var(--color-glow),
              inset 0 1px 0 rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  z-index: 50;
}

body.theme-violet .glass-card.is-expanded {
  background: rgba(16, 8, 38, 0.9);
}

body.theme-emerald .glass-card.is-expanded {
  background: rgba(3, 28, 23, 0.9);
}

/* Card Header Row */
.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.card-expand-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 12px;
  border-radius: 9999px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: var(--transition-smooth);
}

.glass-card:hover .card-expand-badge {
  color: #fff;
  border-color: var(--color-secondary);
  background: rgba(255, 255, 255, 0.08);
}

.glass-card.is-expanded .card-expand-badge {
  color: #fff;
  background: var(--color-glow);
  border-color: var(--color-secondary);
}

.expand-chevron {
  width: 14px;
  height: 14px;
  transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-card.is-expanded .expand-chevron {
  transform: rotate(180deg);
}

/* Internal Card Glow Mesh */
.card-glow {
  position: absolute;
  top: -60px;
  right: -60px;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-glow) 0%, transparent 70%);
  filter: blur(20px);
  pointer-events: none;
  opacity: 0.4;
  transition: opacity 0.4s ease, transform 0.4s ease;
}

.glass-card:hover .card-glow {
  opacity: 0.8;
  transform: scale(1.3);
}

.card-icon-wrap {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 0;
  transition: var(--transition-smooth);
}

.glass-card:hover .card-icon-wrap {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 16px var(--color-glow);
  transform: scale(1.06);
}

.card-icon {
  width: 24px;
  height: 24px;
}

.card-title {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.card-desc {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin-bottom: 24px;
  flex: 1;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.card-tags span {
  font-size: 0.72rem;
  font-family: var(--font-code);
  font-weight: 500;
  color: var(--color-secondary);
  background: rgba(255, 255, 255, 0.04);
  padding: 4px 10px;
  border-radius: 9999px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* ==========================================================================
   Smoothly Expandable Card Content & Glossary
   ========================================================================== */
.card-expanded-content {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.35s ease,
              margin-top 0.35s ease;
  margin-top: 0;
}

.glass-card.is-expanded .card-expanded-content {
  max-height: min(520px, 60vh);
  overflow-y: auto;
  opacity: 1;
  margin-top: 18px;
  padding-right: 6px;
}

/* Custom scrollbar inside expanded card */
.card-expanded-content::-webkit-scrollbar {
  width: 5px;
}
.card-expanded-content::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 4px;
}
.card-expanded-content::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 4px;
}

.expanded-inner {
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.expanded-section-title {
  font-family: var(--font-code);
  font-size: 0.78rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--color-secondary);
  margin-bottom: 16px;
}

.terms-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.term-item {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 12px;
  padding: 14px 16px;
  transition: border-color 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

.term-item:hover {
  border-color: var(--glass-border-hover);
  background: rgba(255, 255, 255, 0.05);
  transform: translateX(3px);
}

.term-name {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.term-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
  flex-shrink: 0;
}

.term-explanation {
  font-size: 0.86rem;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0;
}

.expanded-footer-hint {
  margin-top: 20px;
  text-align: center;
}

.hint-collapse-pill {
  display: inline-block;
  font-size: 0.72rem;
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.04);
  padding: 6px 14px;
  border-radius: 9999px;
  border: 1px dashed rgba(255, 255, 255, 0.12);
  transition: var(--transition-smooth);
}

.glass-card:hover .hint-collapse-pill {
  color: var(--text-main);
  border-color: var(--color-secondary);
}

/* ==========================================================================
   Footer Status Bar
   ========================================================================== */
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 16px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 0.78rem;
  color: var(--text-dim);
}

.footer-status {
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #34d399;
  box-shadow: 0 0 8px #34d399;
}

.footer-telemetry {
  display: flex;
  gap: 16px;
}

.telemetry-item span {
  color: var(--text-main);
  font-weight: 600;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInScale {
  from { opacity: 0; transform: scale(0.94); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes cardEntrance {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  /* Skrytí textových popisků témat – zůstanou zářící barevné tečky */
  .theme-label {
    display: none !important;
  }
  .theme-btn {
    padding: 5px 6px;
  }
  .header-controls {
    gap: 8px;
  }
}

@media (max-width: 900px) {
  .hero-subtitle {
    letter-spacing: 0.18em;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .site-footer {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
  .footer-telemetry {
    justify-content: center;
  }

  /* Mobilní a tabletová adaptace hlavičky – 100% zobrazení všech ovládacích prvků (zvuk, gyro, téma, replay) */
  .site-header {
    padding: 8px 12px;
  }
  .header-container {
    gap: 8px;
    width: 100%;
    justify-content: space-between;
  }
  .btn-text {
    display: none !important;
  }
  .audio-waves {
    display: none !important;
  }
  .theme-selector-wrap {
    padding: 2px 3px;
    gap: 2px;
  }
  .theme-btn {
    padding: 4px;
    min-width: 24px;
    min-height: 24px;
    justify-content: center;
  }
  .color-preview {
    width: 8px;
    height: 8px;
  }
  .control-btn {
    padding: 0 !important;
    width: 32px !important;
    height: 32px !important;
    min-width: 32px !important;
    border-radius: 50% !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
  }
  .control-btn .icon {
    width: 15px !important;
    height: 15px !important;
  }
  .header-controls {
    gap: 6px;
  }
}

@media (max-width: 480px) {
  .site-header {
    padding: 6px 8px;
  }
  .header-container {
    gap: 4px;
  }
  .brand-badge {
    gap: 6px;
  }
  .brand-name {
    font-size: 0.95rem;
  }
  .brand-pulse-dot {
    width: 7px;
    height: 7px;
  }
  .header-controls {
    gap: 4px;
  }
  .theme-selector-wrap {
    padding: 2px;
    gap: 1px;
  }
  .theme-btn {
    padding: 3px;
    min-width: 20px;
    min-height: 20px;
  }
  .color-preview {
    width: 7px;
    height: 7px;
  }
  .control-btn {
    width: 29px !important;
    height: 29px !important;
    min-width: 29px !important;
  }
  .control-btn .icon {
    width: 14px !important;
    height: 14px !important;
  }
  .content-wrapper {
    padding-top: 54px;
  }
  .hero-badge-tag {
    font-size: 0.68rem;
    padding: 5px 12px;
  }
}

/* Gyroscope active indicator */
.control-btn.gyro-active {
  background: rgba(56, 189, 248, 0.2);
  border-color: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 12px var(--color-glow);
}