/* =========================================================
   Samuel Mezdej — personal site
   Vanilla CSS, žiadny build step.
   Theme: BlueberryS dark + orange (default), prepisateľný cez theme picker.
   ========================================================= */

:root {
  /* Brand defaults — override-uje theme.js cez .style.setProperty */
  --color-primary: #FF6600;
  --color-primary-hover: #FF8533;
  --color-primary-soft: rgba(255, 102, 0, 0.15);

  /* Surface palette (neprepisuje sa theme picker-om) */
  --color-background: #121212;
  --color-surface: #1E1E1E;
  --color-surface-elevated: #2A2A2A;
  --color-text: #FFFFFF;
  --color-text-muted: #9E9E9E;
  --color-border: #2A2A2A;

  /* Status */
  --color-success: #4CAF50;
  --color-error: #F44336;

  /* Layout */
  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-pill: 999px;
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 32px var(--color-primary-soft);
  --transition: 0.25s ease;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Quicksand', 'Montserrat', system-ui, -apple-system, sans-serif;
  background: var(--color-background);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

img { max-width: 100%; height: auto; display: block; }

a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-hover); }

/* ---------- Header ---------- */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  background: rgba(18, 18, 18, 0.78);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  transition: background var(--transition);
}
.header.scrolled { background: rgba(18, 18, 18, 0.94); }

.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.9rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

.logo {
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-text);
  letter-spacing: 0.5px;
}
.logo span { color: var(--color-primary); }

.nav { display: flex; gap: 1.5rem; align-items: center; }
.nav a {
  color: var(--color-text-muted);
  font-weight: 500;
  font-size: 0.95rem;
}
.nav a:hover { color: var(--color-text); }

.header-right { display: flex; align-items: center; gap: 0.75rem; }

.lang-switch {
  display: inline-flex; align-items: center;
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  padding: 3px;
}
.lang-switch a {
  padding: 0.3rem 0.7rem;
  border-radius: var(--radius-pill);
  color: var(--color-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
}
.lang-switch a.active { background: var(--color-primary); color: #fff; }

.hamburger {
  display: none;
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem 0.5rem;
}

/* ---------- Hero ---------- */
.hero {
  padding: 8rem 0 4rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--color-primary-soft) 0%, transparent 70%);
  pointer-events: none;
}

.hero-avatar {
  width: 140px; height: 140px;
  border-radius: 50%;
  margin: 0 auto 1.5rem;
  background: var(--color-surface-elevated);
  border: 4px solid var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem;
  color: var(--color-primary);
  font-weight: 700;
  box-shadow: var(--shadow-glow);
  position: relative;
  z-index: 1;
}
.hero-avatar img {
  width: 100%; height: 100%;
  border-radius: 50%;
  object-fit: cover;
}

.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1rem;
  position: relative;
  z-index: 1;
}
.hero h1 span { color: var(--color-primary); }

.hero-subtitle {
  font-size: 1.15rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto 2rem;
  position: relative;
  z-index: 1;
}

.hero-cta {
  display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- Sections ---------- */
section { padding: 4rem 0; }

.section-header { text-align: center; margin-bottom: 3rem; }
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
}
.section-header h2 span { color: var(--color-primary); }
.section-header p {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ---------- Card grids ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}
.card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
.card-icon {
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}
.card h3 {
  font-size: 1.2rem;
  font-weight: 700;
}
.card p { color: var(--color-text-muted); font-size: 0.95rem; }
.card-link {
  margin-top: auto;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex; align-items: center; gap: 0.4rem;
}
.card-link:hover { gap: 0.7rem; }

/* ---------- Gallery ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.5rem;
}
.gallery-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.gallery-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
}
.gallery-thumb {
  aspect-ratio: 1;
  background: var(--color-surface-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.5rem;
  color: var(--color-text-muted);
  position: relative;
  overflow: hidden;
}
.gallery-thumb img {
  width: 100%; height: 100%; object-fit: cover;
}
.gallery-caption {
  padding: 0.85rem 1rem;
  text-align: center;
  color: var(--color-text);
  font-size: 0.95rem;
  font-weight: 600;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

/* ---------- Blog cards ---------- */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}
.blog-card {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.blog-card:hover {
  border-color: var(--color-primary);
  border-left-color: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.blog-date {
  display: inline-block;
  color: var(--color-primary);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  background: var(--color-primary-soft);
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.85rem;
}
.blog-card h3 {
  font-size: 1.3rem;
  margin: 0 0 0.75rem;
  line-height: 1.3;
}
.blog-card p {
  color: var(--color-text-muted);
  line-height: 1.55;
}
.blog-card.placeholder {
  opacity: 0.7;
  border-left-color: var(--color-border);
}
.blog-card.placeholder:hover {
  opacity: 1;
  border-left-color: var(--color-primary);
}

/* ---------- About info pills ---------- */
.about-pills {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
}
.pill {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 0.4rem 0.9rem;
  border-radius: var(--radius-pill);
  font-size: 0.85rem;
}
.pill::before {
  content: '★ ';
  color: var(--color-primary);
}

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  margin-top: 4rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}
.footer a { color: var(--color-text-muted); }
.footer a:hover { color: var(--color-primary); }

/* ---------- Theme picker (floating, bottom-LEFT aby sa nehádal s AI chat) ---------- */
.theme-picker {
  position: fixed;
  bottom: 1.5rem; left: 1.5rem;
  z-index: 200;
  display: none;
}
.theme-picker.active { display: block; }

.theme-toggle {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-surface-elevated);
  cursor: pointer;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transition: transform var(--transition);
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 1.5rem;
}
.theme-toggle:hover { transform: scale(1.1) rotate(15deg); }

.theme-panel {
  position: absolute;
  bottom: 70px; left: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  width: 320px;
  max-width: calc(100vw - 3rem);
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
  box-shadow: var(--shadow-md);
  display: none;
}
.theme-panel.open { display: block; }

.theme-panel h4 {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  margin-bottom: 0.6rem;
  text-transform: uppercase;
  letter-spacing: 1.2px;
  font-weight: 700;
}

.swatches {
  display: grid;
  grid-template-columns: repeat(8, 1fr);  /* one row of 8 small circles — saves vertical space */
  gap: 0.4rem;
  margin-bottom: 0.6rem;
}
.swatch {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition);
  min-width: 0;
}
.swatch:hover { transform: scale(1.15); }
.swatch.active { border-color: #fff; box-shadow: 0 0 0 2px var(--color-primary); }

/* Background color swatches — 8-col grid like accent (one row) */
.bg-color-swatches {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 0.4rem;
  margin-bottom: 0.6rem;
}
.bg-color-swatch {
  border-color: rgba(255, 255, 255, 0.15);
}
.bg-color-swatch.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.4);
}

/* Custom <input type=color> picker row — small slim native picker */
.custom-picker-row {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}
.custom-picker-row label { flex-shrink: 0; }
.custom-picker-row input[type="color"] {
  flex: 1;
  height: 30px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  padding: 2px;
  min-width: 0;
}
.custom-picker-row input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
.custom-picker-row input[type="color"]::-webkit-color-swatch { border: none; border-radius: 4px; }

.theme-actions {
  display: flex; flex-direction: column; gap: 0.4rem;
  margin-top: 0.85rem;
}
.theme-actions button {
  background: var(--color-surface-elevated);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background var(--transition);
  font-family: inherit;
}
.theme-actions button:hover { background: var(--color-primary); border-color: var(--color-primary); }

/* Background switcher cards with mini previews */
.bg-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  margin-bottom: 0.5rem;
}
.bg-card {
  background: var(--color-surface-elevated);
  border: 2px solid transparent;
  color: var(--color-text);
  padding: 0;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: inherit;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transition: all 0.15s;
}
.bg-card:hover { border-color: var(--color-primary); transform: translateY(-2px); }
.bg-card.active {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 1px var(--color-primary), var(--shadow-md);
}
.bg-card-preview {
  aspect-ratio: 16 / 10;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #050708;
}
.bg-card-preview::after {
  content: '';
  position: absolute; inset: 0;
  pointer-events: none;
}
.bg-card[data-bg="none"] .bg-card-preview {
  background:
    linear-gradient(135deg, var(--color-background), var(--color-surface));
}
.bg-card[data-bg="matrix"] .bg-card-preview {
  background:
    linear-gradient(180deg, transparent 0%, var(--color-primary-soft) 60%, #000 100%),
    #000;
}
.bg-card[data-bg="matrix"] .bg-card-preview::after {
  /* Vertical stripes simulating digital rain columns (90deg = bands stack horizontally → vertical lines) */
  background:
    repeating-linear-gradient(90deg,
      var(--color-primary) 0px, var(--color-primary) 1px,
      transparent 1px, transparent 7px);
  opacity: 0.35;
  /* Vertical fade so columns appear to drip from top */
  mask-image: linear-gradient(180deg, transparent 0%, #000 50%, #000 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 0%, #000 50%, #000 100%);
}
.bg-card[data-bg="plexus"] .bg-card-preview {
  background:
    radial-gradient(circle at 50% 50%, var(--color-primary-soft), transparent 60%),
    radial-gradient(circle at 25% 75%, var(--color-primary-soft), transparent 55%),
    #03060a;
}
.bg-card[data-bg="plexus"] .bg-card-preview::after {
  background-image:
    radial-gradient(circle 2px at 30% 40%, var(--color-primary), transparent),
    radial-gradient(circle 1.5px at 70% 30%, var(--color-primary), transparent),
    radial-gradient(circle 2px at 60% 70%, var(--color-primary), transparent),
    radial-gradient(circle 1.5px at 20% 65%, var(--color-primary), transparent),
    radial-gradient(circle 1.5px at 85% 60%, var(--color-primary), transparent);
}
.bg-card[data-bg="helios"] .bg-card-preview {
  background:
    radial-gradient(circle at 50% 55%, var(--color-primary-soft), transparent 50%),
    radial-gradient(ellipse at 30% 30%, var(--color-primary-soft), transparent 40%),
    #050708;
}
.bg-card[data-bg="helios"] .bg-card-preview::after {
  background-image:
    radial-gradient(circle 1px at 15% 20%, #fff, transparent),
    radial-gradient(circle 1px at 75% 35%, #fff, transparent),
    radial-gradient(circle 1px at 40% 60%, #fff, transparent),
    radial-gradient(circle 1px at 85% 80%, #fff, transparent),
    radial-gradient(circle 1.5px at 60% 25%, var(--color-primary), transparent),
    radial-gradient(circle 1.5px at 25% 75%, var(--color-primary), transparent);
}
.bg-card-label {
  padding: 0.45rem 0.6rem;
  display: flex; align-items: center; gap: 0.4rem;
  font-size: 0.78rem;
  font-weight: 600;
  background: var(--color-surface-elevated);
  border-top: 1px solid var(--color-border);
}
.bg-card-label .bg-icon { font-size: 0.95rem; line-height: 1; }

/* Mobile: theme picker becomes bottom sheet */
@media (max-width: 480px) {
  .theme-picker { left: 1rem; bottom: 1rem; }
  .theme-panel {
    position: fixed;
    bottom: 5rem;
    left: 1rem; right: 1rem;
    width: auto;
    max-width: none;
    max-height: calc(100vh - 7rem);
    padding: 1.25rem;
  }
  .bg-grid { grid-template-columns: repeat(2, 1fr); }
  .swatches { grid-template-columns: repeat(8, 1fr); }
}

/* When a canvas background is active, body's surface needs to be transparent
   so the canvas behind shows through. Sections still have their own surface bg. */
body:has(#samBgCanvas) { background: transparent !important; }

/* ---------- Daily fact bar (homepage, under hero) ---------- */
.fact-bar {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 0.9rem 1.25rem;
  margin: 0 auto;
  max-width: 900px;
  font-size: 0.95rem;
  line-height: 1.45;
  min-height: 56px;
  opacity: 0.6;
  transition: opacity 0.3s ease;
}
.fact-bar.loaded { opacity: 1; }
.fact-bar:empty::before {
  content: 'Načítavam fakt dňa...';
  color: var(--color-text-muted);
  font-style: italic;
}
.fact-tag {
  flex-shrink: 0;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.fact-text { color: var(--color-text); }
@media (max-width: 600px) {
  .fact-bar { flex-direction: column; align-items: flex-start; gap: 0.5rem; }
}

/* ---------- 3D Galéria CTA box (homepage, between Galéria a Hry) ---------- */
.gallery-3d-cta {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  background: linear-gradient(135deg, var(--color-surface-elevated) 0%, var(--color-surface) 100%);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 2rem 2.25rem;
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.gallery-3d-cta::after {
  content: '';
  position: absolute;
  top: -40%; right: -10%;
  width: 280px; height: 280px;
  background: radial-gradient(circle, var(--color-primary-soft) 0%, transparent 70%);
  pointer-events: none;
}
.gallery-3d-cta:hover {
  transform: translateY(-3px);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  color: var(--color-text);
}
.g3d-icon {
  font-size: 5rem;
  flex-shrink: 0;
  line-height: 1;
  filter: drop-shadow(0 4px 12px rgba(255, 102, 0, 0.3));
  position: relative;
  z-index: 1;
}
.g3d-body {
  flex: 1;
  position: relative;
  z-index: 1;
}
.g3d-body h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  margin-bottom: 0.6rem;
  color: var(--color-text);
}
.g3d-body h2::after {
  content: '';
  display: inline-block;
  margin-left: 0.6rem;
  padding: 0.2rem 0.55rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-pill);
  font-size: 0.6em;
  font-weight: 700;
  letter-spacing: 1px;
  vertical-align: middle;
  content: 'NEW';
}
.g3d-body p {
  color: var(--color-text-muted);
  margin-bottom: 0.85rem;
  font-size: 1rem;
  line-height: 1.5;
}
.g3d-arrow {
  display: inline-block;
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.95rem;
  padding: 0.5rem 1.1rem;
  background: var(--color-primary-soft);
  border-radius: var(--radius-pill);
  transition: all var(--transition);
}
.gallery-3d-cta:hover .g3d-arrow {
  background: var(--color-primary);
  color: #fff;
  padding-right: 1.4rem;
}
@media (max-width: 600px) {
  .gallery-3d-cta { flex-direction: column; text-align: center; padding: 1.5rem 1rem; gap: 1rem; }
  .g3d-icon { font-size: 4rem; }
}

/* ---------- AI CTA box (homepage section linking to /ask/) ---------- */
.ai-cta {
  display: flex;
  align-items: center;
  gap: 2rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-hover) 100%);
  border: none;
  border-radius: var(--radius-lg);
  padding: 2.5rem 2.5rem;
  text-decoration: none;
  color: #fff;
  transition: all var(--transition);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  position: relative;
  overflow: hidden;
}
.ai-cta::after {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 300px; height: 300px;
  background: radial-gradient(circle, rgba(255,255,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.ai-cta:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), var(--shadow-glow);
  color: #fff;
}
.ai-cta-icon {
  font-size: 5.5rem;
  flex-shrink: 0;
  line-height: 1;
  filter: drop-shadow(0 4px 12px rgba(0, 0, 0, 0.3));
  position: relative;
  z-index: 1;
}
.ai-cta-body {
  flex: 1;
  position: relative;
  z-index: 1;
}
.ai-cta-body h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: #fff;
  line-height: 1.15;
}
.ai-cta-body p {
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 1rem;
  font-size: 1.15rem;
  line-height: 1.5;
}
.ai-cta-arrow {
  display: inline-block;
  color: #fff;
  font-weight: 700;
  font-size: 1.05rem;
  padding: 0.55rem 1.25rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-pill);
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}
.ai-cta:hover .ai-cta-arrow {
  background: rgba(255, 255, 255, 0.3);
  padding-right: 1.5rem;
}
@media (max-width: 600px) {
  .ai-cta { flex-direction: column; text-align: center; padding: 2rem 1.5rem; gap: 1.25rem; }
  .ai-cta-icon { font-size: 4.5rem; }
  .ai-cta-body p { font-size: 1.05rem; }
}

/* ---------- Reveal animation (vanilla, no library) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Mobile ---------- */
@media (max-width: 768px) {
  .hamburger { display: block; }
  .nav {
    display: none;
    position: absolute;
    top: 100%; left: 0; right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 1.5rem;
    gap: 1rem;
  }
  .nav.open { display: flex; }
  .hero { padding: 6rem 0 3rem; }
  section { padding: 3rem 0; }
}