/* ================================================================
   Nexus Hub — Liquid Glass Design System
   Spatial grid · SF Pro · aurora mesh · light & dark themes
================================================================ */

/* ===== TOKENS ===== */
:root {
  --bg:               #050508;
  --bg-elev:          #08080e;
  --text:             #f5f5f7;
  --text-muted:       rgba(255,255,255,0.62);
  --text-dim:         rgba(255,255,255,0.38);
  --text-faint:       rgba(255,255,255,0.22);

  --glass-1:          rgba(255,255,255,0.04);
  --glass-2:          rgba(255,255,255,0.06);
  --glass-3:          rgba(255,255,255,0.09);
  --glass-4:          rgba(255,255,255,0.14);

  --stroke-1:         rgba(255,255,255,0.08);
  --stroke-2:         rgba(255,255,255,0.12);
  --stroke-3:         rgba(255,255,255,0.18);

  --spec:             rgba(255,255,255,0.4);

  --accent-h:         255;
  --accent:           oklch(0.70 0.17 var(--accent-h));
  --accent-2:         oklch(0.78 0.14 calc(var(--accent-h) - 60));
  --accent-soft:      oklch(0.70 0.17 var(--accent-h) / 0.2);
  --accent-faint:     oklch(0.70 0.17 var(--accent-h) / 0.08);

  --tint-tools:       oklch(0.70 0.17 265);
  --tint-games:       oklch(0.70 0.17 330);
  --tint-ai:          oklch(0.72 0.15 165);
  --tint-quran:       oklch(0.80 0.14 85);

  --success:          oklch(0.72 0.15 155);
  --warning:          oklch(0.78 0.15 70);
  --danger:           oklch(0.68 0.18 25);

  --r-xs: 8px;
  --r-sm: 12px;
  --r-md: 18px;
  --r-lg: 24px;
  --r-xl: 32px;
  --r-pill: 999px;

  --blur:             saturate(180%) blur(24px);
  --blur-heavy:       saturate(200%) blur(40px);
  --blur-ultra:       saturate(220%) blur(60px);

  --shadow-glass:     0 8px 32px -8px rgba(0,0,0,0.5), 0 2px 8px rgba(0,0,0,0.3);
  --shadow-hover:     0 20px 50px -10px rgba(0,0,0,0.6);
  --spec-edge:        inset 0 1px 0 rgba(255,255,255,0.14);

  --font: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Segoe UI', system-ui, sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Menlo', 'Monaco', monospace;

  --transition: all 0.3s cubic-bezier(0.34, 1.2, 0.64, 1);
  --spring: cubic-bezier(0.34, 1.2, 0.64, 1);
}

html.theme-light {
  --bg:               #f2f2f6;
  --bg-elev:          #ebebf0;
  --text:             #0a0a12;
  --text-muted:       rgba(0,0,0,0.62);
  --text-dim:         rgba(0,0,0,0.38);
  --text-faint:       rgba(0,0,0,0.22);

  --glass-1:          rgba(255,255,255,0.55);
  --glass-2:          rgba(255,255,255,0.65);
  --glass-3:          rgba(255,255,255,0.75);
  --glass-4:          rgba(255,255,255,0.85);

  --stroke-1:         rgba(0,0,0,0.06);
  --stroke-2:         rgba(0,0,0,0.10);
  --stroke-3:         rgba(0,0,0,0.14);

  --spec:             rgba(255,255,255,0.9);
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  letter-spacing: -0.01em;
  overflow-x: hidden;
  font-feature-settings: 'ss01', 'cv11';
}

a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { opacity: 0.85; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
::selection { background: var(--accent-soft); color: var(--text); }

/* ===== AURORA BACKGROUND ===== */
.aurora-stage {
  position: fixed;
  inset: 0;
  z-index: -2;
  overflow: hidden;
  pointer-events: none;
  background: var(--bg);
}
.aurora-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  will-change: transform;
  mix-blend-mode: screen;
}
html.theme-light .aurora-blob { mix-blend-mode: multiply; opacity: 0.55; }

.aurora-blob.b1 {
  width: 60vw; height: 60vw;
  left: -15vw; top: -20vw;
  background: radial-gradient(circle, oklch(0.60 0.19 var(--accent-h) / 0.9) 0%, transparent 70%);
  animation: orbFloat1 28s ease-in-out infinite;
}
.aurora-blob.b2 {
  width: 55vw; height: 55vw;
  right: -15vw; top: -10vw;
  background: radial-gradient(circle, oklch(0.65 0.15 calc(var(--accent-h) - 60) / 0.85) 0%, transparent 70%);
  animation: orbFloat2 34s ease-in-out infinite;
}
.aurora-blob.b3 {
  width: 65vw; height: 65vw;
  left: 10vw; bottom: -25vw;
  background: radial-gradient(circle, oklch(0.52 0.19 calc(var(--accent-h) + 40) / 0.85) 0%, transparent 70%);
  animation: orbFloat3 40s ease-in-out infinite;
}
.aurora-blob.b4 {
  width: 45vw; height: 45vw;
  right: 5vw; bottom: -15vw;
  background: radial-gradient(circle, oklch(0.62 0.16 calc(var(--accent-h) + 100) / 0.7) 0%, transparent 70%);
  animation: orbFloat4 32s ease-in-out infinite;
}

.aurora-stage::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 0.4 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.07;
  mix-blend-mode: overlay;
  pointer-events: none;
}
html.theme-light .aurora-stage::after { opacity: 0.03; mix-blend-mode: multiply; }

@keyframes orbFloat1 {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  25%      { transform: translate3d(10vw, 8vh, 0) scale(1.15); }
  50%      { transform: translate3d(20vw, -5vh, 0) scale(0.9); }
  75%      { transform: translate3d(5vw, 12vh, 0) scale(1.1); }
}
@keyframes orbFloat2 {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  33%      { transform: translate3d(-15vw, 10vh, 0) scale(1.2); }
  66%      { transform: translate3d(-8vw, 20vh, 0) scale(0.85); }
}
@keyframes orbFloat3 {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  30%      { transform: translate3d(18vw, -12vh, 0) scale(1.1); }
  60%      { transform: translate3d(-5vw, -20vh, 0) scale(0.95); }
  80%      { transform: translate3d(8vw, -8vh, 0) scale(1.15); }
}
@keyframes orbFloat4 {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  40%      { transform: translate3d(-20vw, -15vh, 0) scale(1.25); }
  70%      { transform: translate3d(-10vw, -25vh, 0) scale(0.9); }
}

@media (prefers-reduced-motion: reduce) { .aurora-blob { animation: none !important; } }
html.motion-off .aurora-blob { animation: none !important; }

/* ===== LAYOUT ===== */
.container { max-width: 1240px; margin: 0 auto; padding: 0 28px; }
main { flex: 1; position: relative; z-index: 1; }

/* ===== HEADER — Floating pill nav ===== */
.site-header {
  position: fixed;
  top: 18px;
  left: 0; right: 0;
  z-index: 200;
  display: flex;
  justify-content: center;
  pointer-events: none;
}
.header-inner {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: 5px 7px;
  background: var(--glass-3);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--stroke-2);
  border-radius: var(--r-pill);
  box-shadow: var(--shadow-glass), var(--spec-edge);
  position: relative;
}
.header-inner::before {
  content: '';
  position: absolute;
  top: 0; left: 15%; right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--spec), transparent);
  pointer-events: none;
}
.logo {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 7px 14px;
  color: var(--text);
  text-decoration: none;
}
.logo-icon {
  width: 24px; height: 24px;
  border-radius: 7px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  font-weight: 700;
  color: #0a0a12;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.3);
  flex-shrink: 0;
}
.logo-text {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
}
.nav-divider {
  width: 1px; height: 20px;
  background: var(--stroke-1);
  margin: 0 4px;
  flex-shrink: 0;
}
.main-nav { display: flex; align-items: center; gap: 1px; }
.main-nav a {
  padding: 7px 14px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  border-radius: var(--r-pill);
  letter-spacing: -0.01em;
  transition: var(--transition);
}
.main-nav a:hover { color: var(--text); background: var(--glass-2); opacity: 1; }
.main-nav a.active {
  color: var(--text);
  background: var(--glass-3);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.1);
}
.theme-toggle {
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 15px;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.theme-toggle:hover { background: var(--glass-2); color: var(--text); }
.menu-toggle {
  display: none;
  width: 34px; height: 34px;
  background: transparent;
  border: 0;
  color: var(--text-muted);
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
}
.menu-toggle:hover { background: var(--glass-2); color: var(--text); }

/* ===== HERO (generic tool pages) ===== */
.hero { padding: 130px 0 48px; text-align: center; position: relative; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  background: var(--glass-2);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-pill);
  box-shadow: var(--spec-edge);
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 14px;
  color: var(--text);
}
.hero h1 b, .hero h1 strong { font-weight: 600; }
.hero p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 540px;
  margin: 0 auto 36px;
  line-height: 1.55;
}

/* Hero search */
.search-wrap { max-width: 560px; margin: 0 auto 32px; position: relative; }
.search-wrap input {
  width: 100%;
  padding: 14px 50px 14px 22px;
  background: var(--glass-2);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--stroke-2);
  border-radius: var(--r-pill);
  color: var(--text);
  font-size: 15px;
  font-family: var(--font);
  outline: none;
  transition: var(--transition);
  box-shadow: var(--spec-edge);
  letter-spacing: -0.01em;
}
.search-wrap input:focus {
  background: var(--glass-3);
  border-color: var(--accent);
  box-shadow: var(--spec-edge), 0 0 0 4px var(--accent-faint);
}
.search-wrap input::placeholder { color: var(--text-dim); }
.search-icon {
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
  font-size: 15px;
}

/* ===== CATEGORY FILTERS ===== */
.category-filters {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 44px;
}
.filter-btn {
  padding: 7px 16px;
  background: var(--glass-1);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-pill);
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 500;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: -0.01em;
}
.filter-btn:hover { background: var(--glass-2); color: var(--text); border-color: var(--stroke-2); }
.filter-btn.active {
  background: var(--glass-4);
  color: var(--text);
  border-color: var(--stroke-3);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.2);
}

/* ===== TOOL GRID ===== */
.section-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-2);
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: 16px;
  padding: 0;
  border-bottom: none;
}
.tools-section { margin-bottom: 48px; }
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}
.tool-card {
  position: relative;
  padding: 22px 20px;
  background: var(--glass-1);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-lg);
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: block;
  overflow: hidden;
  color: var(--text);
  box-shadow: var(--spec-edge);
}
.tool-card::before {
  content: '';
  position: absolute;
  top: 0; left: 15%; right: 15%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--spec), transparent);
  pointer-events: none;
  opacity: 0.6;
}
.tool-card:hover {
  background: var(--glass-2);
  border-color: var(--stroke-2);
  transform: translateY(-4px);
  box-shadow: var(--spec-edge), var(--shadow-hover);
  color: var(--text);
  opacity: 1;
}
.tool-icon {
  width: 44px; height: 44px;
  border-radius: 13px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  margin-bottom: 14px;
  background: var(--glass-2);
  border: 1px solid var(--stroke-1);
  box-shadow: var(--spec-edge);
}
.cat-calculators .tool-icon { background: linear-gradient(145deg, oklch(0.70 0.17 265 / 0.3), oklch(0.70 0.17 265 / 0.08)); }
.cat-text        .tool-icon { background: linear-gradient(145deg, oklch(0.72 0.15 200 / 0.3), oklch(0.72 0.15 200 / 0.08)); }
.cat-design      .tool-icon { background: linear-gradient(145deg, oklch(0.70 0.17 330 / 0.3), oklch(0.70 0.17 330 / 0.08)); }
.cat-datetime    .tool-icon { background: linear-gradient(145deg, oklch(0.72 0.15 165 / 0.3), oklch(0.72 0.15 165 / 0.08)); }
.tool-card h3 {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 4px;
}
.tool-card p {
  font-size: 12.5px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ===== TOOL PAGE ===== */
.tool-page { padding: 110px 0 60px; position: relative; z-index: 1; }
.breadcrumb {
  font-size: 12.5px;
  color: var(--text-muted);
  margin-bottom: 18px;
  display: flex; align-items: center; gap: 8px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--text); opacity: 1; }
.breadcrumb span { color: var(--text-dim); }
.breadcrumb span:last-child { color: var(--text); }
.tool-header { margin-bottom: 28px; }
.tool-header h1 {
  font-size: clamp(1.8rem, 3vw, 2.3rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 8px;
  color: var(--text);
}
.tool-header p {
  color: var(--text-muted);
  font-size: 14.5px;
  max-width: 620px;
  line-height: 1.55;
}

/* ===== TOOL WIDGET (glass card) ===== */
.tool-widget {
  position: relative;
  background: var(--glass-2);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--stroke-2);
  border-radius: var(--r-xl);
  padding: 32px;
  max-width: 720px;
  box-shadow: var(--shadow-glass), var(--spec-edge);
  overflow: hidden;
}
.tool-widget::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--spec), transparent);
}
.tool-widget.wide { max-width: 100%; }

/* ===== FORMS ===== */
.form-group { margin-bottom: 18px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
label {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
input[type="text"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
input[type="email"],
input[type="url"],
input[type="password"],
input[type="search"],
select,
textarea {
  width: 100%;
  padding: 12px 14px;
  background: var(--glass-1);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-sm);
  color: var(--text);
  font-size: 14.5px;
  font-family: var(--font);
  outline: none;
  transition: var(--transition);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
  letter-spacing: -0.01em;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  background: var(--glass-2);
  box-shadow: 0 0 0 3px var(--accent-faint), inset 0 1px 0 rgba(255,255,255,0.04);
}
textarea { resize: vertical; min-height: 120px; line-height: 1.55; font-family: var(--font-mono); font-size: 13.5px; }
select option { background: var(--bg-elev); color: var(--text); }
input[type="color"] {
  -webkit-appearance: none;
  appearance: none;
  width: 48px; height: 40px;
  border: 1px solid var(--stroke-2);
  border-radius: var(--r-sm);
  background: none;
  cursor: pointer;
  padding: 2px;
}
input[type="color"]::-webkit-color-swatch-wrapper { padding: 0; }
input[type="color"]::-webkit-color-swatch { border: none; border-radius: 6px; }
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%; height: 5px;
  background: var(--glass-3);
  border-radius: 3px;
  outline: none;
  padding: 0;
  border: none;
  box-shadow: none;
}
input[type="range"]:focus { box-shadow: none; }
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px; height: 18px;
  border-radius: 50%;
  background: var(--text);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.4);
  transition: var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type="checkbox"] { accent-color: var(--accent); width: 15px; height: 15px; }
.checkbox-group { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 8px; }
.checkbox-label {
  display: flex; align-items: center; gap: 8px;
  cursor: pointer; font-size: 13.5px; color: var(--text-muted); user-select: none;
}

/* Toggle group */
.toggle-group {
  display: inline-flex; gap: 2px;
  background: var(--glass-1);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-sm);
  padding: 3px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.toggle-btn {
  padding: 7px 16px;
  border-radius: 9px;
  border: 0;
  background: transparent;
  color: var(--text-muted);
  font-size: 13px; font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font);
  letter-spacing: -0.01em;
}
.toggle-btn.active {
  background: var(--glass-3);
  color: var(--text);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.15);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 11px 20px;
  border-radius: var(--r-sm);
  font-size: 14px; font-weight: 600;
  font-family: var(--font);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
  outline: none;
  line-height: 1;
  letter-spacing: -0.01em;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0a0a12;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.3), 0 4px 14px var(--accent-soft);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.3), 0 8px 22px var(--accent-soft);
  color: #0a0a12; opacity: 1;
}
.btn-secondary {
  background: var(--glass-2);
  backdrop-filter: var(--blur);
  border-color: var(--stroke-2);
  color: var(--text);
  box-shadow: var(--spec-edge);
}
.btn-secondary:hover { background: var(--glass-3); border-color: var(--stroke-3); color: var(--text); opacity: 1; }
.btn-ghost { background: transparent; color: var(--text-muted); border-color: var(--stroke-1); }
.btn-ghost:hover { color: var(--text); border-color: var(--stroke-2); background: var(--glass-1); opacity: 1; }
.btn-sm { padding: 8px 14px; font-size: 12.5px; }
.btn-lg { padding: 14px 28px; font-size: 15px; }
.btn-group { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 20px; }
.btn:active { transform: scale(0.97); }

/* ===== RESULT BOX ===== */
.result-box {
  position: relative;
  margin-top: 24px;
  padding: 22px 24px;
  background: linear-gradient(145deg, var(--accent-soft), var(--glass-1));
  border: 1px solid var(--stroke-2);
  border-radius: var(--r-lg);
  box-shadow: var(--spec-edge);
  overflow: hidden;
}
.result-box::before {
  content: '';
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--spec), transparent);
}
.result-box.success { background: linear-gradient(145deg, oklch(0.72 0.15 155 / 0.22), var(--glass-1)); }
.result-box.warning { background: linear-gradient(145deg, oklch(0.78 0.15 70 / 0.22), var(--glass-1)); }
.result-box.danger  { background: linear-gradient(145deg, oklch(0.68 0.18 25 / 0.22), var(--glass-1)); }
.result-label {
  font-size: 11px; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 6px;
}
.result-value {
  font-size: 44px; font-weight: 300; color: var(--text);
  line-height: 1.05; letter-spacing: -0.04em; font-variant-numeric: tabular-nums;
}
.result-sub { font-size: 13.5px; color: var(--text-muted); margin-top: 6px; }
.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px; margin-top: 18px;
}
.result-item {
  background: var(--glass-1);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}
.result-item .r-label {
  font-size: 10.5px; color: var(--text-muted); margin-bottom: 4px;
  font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em;
}
.result-item .r-value {
  font-size: 15px; font-weight: 600; color: var(--text);
  letter-spacing: -0.01em; font-variant-numeric: tabular-nums;
}
.stats-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
.stat-chip {
  display: flex; align-items: center; gap: 7px;
  background: var(--glass-1);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-pill);
  padding: 6px 14px;
  font-size: 12.5px; color: var(--text-muted);
}
.stat-chip .n { font-weight: 600; color: var(--text); }

/* ===== COLOR PREVIEWS ===== */
.color-preview {
  width: 100%; height: 80px;
  border-radius: var(--r-md); border: 1px solid var(--stroke-1);
  margin-bottom: 16px; transition: background 0.3s ease; box-shadow: var(--spec-edge);
}
.color-preview-lg {
  width: 100%; height: 140px;
  border-radius: var(--r-md); border: 1px solid var(--stroke-1);
  margin-bottom: 20px; box-shadow: var(--spec-edge);
}
.gradient-preview {
  width: 100%; height: 160px;
  border-radius: var(--r-md); border: 1px solid var(--stroke-1);
  margin-bottom: 20px; box-shadow: var(--spec-edge);
}
.code-output {
  background: var(--glass-1); border: 1px solid var(--stroke-1);
  border-radius: var(--r-sm); padding: 14px 18px;
  font-family: var(--font-mono); font-size: 13px; color: var(--accent-2);
  word-break: break-all; cursor: pointer;
  transition: var(--transition);
  position: relative;
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.04);
}
.code-output:hover { border-color: var(--accent); background: var(--glass-2); }
.code-output::after {
  content: 'Copy';
  position: absolute; right: 12px; top: 50%; transform: translateY(-50%);
  font-size: 10.5px; color: var(--text-dim); font-family: var(--font);
  padding: 3px 8px; border-radius: 6px;
  background: var(--glass-2); border: 1px solid var(--stroke-1);
}

/* ===== DIFF TOOL ===== */
.diff-container {
  background: var(--glass-1); border: 1px solid var(--stroke-1);
  border-radius: var(--r-md); padding: 14px;
  font-family: var(--font-mono); font-size: 13px; line-height: 1.8;
  max-height: 380px; overflow-y: auto; margin-top: 16px;
}
.diff-add    { background: oklch(0.72 0.15 155 / 0.12); color: var(--success); display: block; padding: 1px 10px; border-left: 3px solid var(--success); }
.diff-remove { background: oklch(0.68 0.18 25 / 0.12); color: var(--danger); display: block; padding: 1px 10px; border-left: 3px solid var(--danger); }
.diff-same   { color: var(--text-muted); display: block; padding: 1px 10px 1px 13px; }

/* ===== COUNTDOWN ===== */
.countdown-display {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 22px;
}
.time-unit {
  background: var(--glass-1); border: 1px solid var(--stroke-1);
  border-radius: var(--r-md); padding: 18px 8px; text-align: center; box-shadow: var(--spec-edge);
}
.time-unit .t-num {
  font-size: 2.8rem; font-weight: 200; color: var(--text);
  font-variant-numeric: tabular-nums; line-height: 1; margin-bottom: 8px;
  font-family: var(--font); letter-spacing: -0.04em;
}
.time-unit .t-label {
  font-size: 10px; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--text-muted); font-weight: 600;
}

/* ===== AD SLOT — AdSense-compatible, design-neutral ===== */
.ad-slot {
  display: block;
  width: 100%;
  overflow: hidden;
  margin: 32px 0;
}
.ad-slot ins { display: block; }

/* ===== TOAST ===== */
.toast {
  position: fixed; bottom: 28px; left: 50%;
  transform: translate(-50%, 80px);
  background: var(--glass-4);
  backdrop-filter: var(--blur-heavy);
  -webkit-backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--stroke-3);
  border-radius: var(--r-pill);
  padding: 12px 22px;
  color: var(--text); font-size: 13.5px; font-weight: 500;
  z-index: 9999;
  box-shadow: var(--shadow-glass), var(--spec-edge);
  opacity: 0;
  transition: all 0.4s var(--spring);
  pointer-events: none;
  letter-spacing: -0.01em;
}
.toast.show { transform: translate(-50%, 0); opacity: 1; }

/* ===== STRENGTH METER ===== */
.strength-bar {
  height: 5px; border-radius: 3px;
  background: var(--glass-2); margin-top: 10px; overflow: hidden;
}
.strength-fill { height: 100%; border-radius: 3px; transition: width 0.4s ease, background 0.4s ease; }
.strength-label { font-size: 12px; color: var(--text-muted); margin-top: 6px; font-weight: 500; }

/* ===== BMI GAUGE ===== */
.bmi-gauge {
  position: relative; height: 10px; border-radius: 6px;
  background: linear-gradient(to right, oklch(0.72 0.15 220), oklch(0.72 0.15 155) 33%, oklch(0.78 0.15 70) 66%, oklch(0.68 0.18 25));
  margin: 20px 0 6px; overflow: visible;
}
.bmi-needle {
  position: absolute; top: -4px; width: 4px; height: 18px;
  background: #fff; border-radius: 2px; transform: translateX(-50%);
  box-shadow: 0 0 8px rgba(255,255,255,0.6), 0 2px 6px rgba(0,0,0,0.4);
  transition: left 0.6s var(--spring);
}
.bmi-labels {
  display: flex; justify-content: space-between;
  font-size: 10.5px; color: var(--text-dim); margin-top: 4px; letter-spacing: 0.03em;
}

/* ===== STATIC PAGES ===== */
.static-page { padding: 130px 0 60px; max-width: 720px; margin: 0 auto; position: relative; z-index: 1; }
.static-page h1 {
  font-size: 2.2rem; font-weight: 600; letter-spacing: -0.03em; margin-bottom: 8px; color: var(--text);
}
.static-page .page-date { color: var(--text-dim); font-size: 13px; margin-bottom: 40px; }
.static-page h2 {
  font-size: 18px; font-weight: 600; margin: 36px 0 10px; color: var(--text); letter-spacing: -0.02em;
}
.static-page p { color: var(--text-muted); margin-bottom: 14px; line-height: 1.75; font-size: 15px; }
.static-page ul {
  list-style: disc; color: var(--text-muted); padding-left: 24px;
  margin-bottom: 16px; line-height: 1.9; font-size: 15px;
}

/* ===== FOOTER ===== */
.site-footer {
  position: relative; z-index: 1;
  border-top: 1px solid var(--stroke-1);
  padding: 36px 0 22px; margin-top: 80px;
}
.footer-inner {
  display: grid; grid-template-columns: 1fr auto; gap: 32px;
  align-items: start; margin-bottom: 24px;
}
.footer-brand .logo { padding: 0; margin-bottom: 10px; }
.footer-brand p { color: var(--text-muted); font-size: 13px; line-height: 1.6; max-width: 320px; }
.footer-links { display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
.footer-links a { color: var(--text-muted); font-size: 13px; letter-spacing: -0.01em; }
.footer-links a:hover { color: var(--text); opacity: 1; }
.footer-copy {
  color: var(--text-dim); font-size: 12px; text-align: center;
  border-top: 1px solid var(--stroke-1); padding-top: 22px; grid-column: 1 / -1;
}

/* ===== REVEAL ANIMATION ===== */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== ORBS (compatibility) ===== */
.orb, #particleCanvas, #hubCanvas { display: none !important; }

/* ===== GAMES PAGE ===== */
.games-hero { padding: 130px 20px 60px; text-align: center; position: relative; overflow: hidden; }
.games-hero h1 {
  font-size: clamp(2.4rem, 6vw, 4rem); font-weight: 300;
  letter-spacing: -0.04em; margin-bottom: 16px; color: var(--text);
}
.fun-title {
  font-size: clamp(3rem, 10vw, 6rem); font-weight: 200;
  letter-spacing: -0.05em; color: var(--text); margin-bottom: 16px;
}
.games-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px; padding: 20px 0 60px;
}
.game-card, .game-card-big {
  position: relative;
  background: var(--glass-2);
  backdrop-filter: var(--blur);
  -webkit-backdrop-filter: var(--blur);
  border: 1px solid var(--stroke-1);
  border-radius: var(--r-lg);
  overflow: hidden;
  text-decoration: none;
  color: var(--text);
  transition: var(--transition);
  display: block;
  box-shadow: var(--spec-edge);
}
.game-card:hover, .game-card-big:hover {
  transform: translateY(-5px); border-color: var(--stroke-2);
  background: var(--glass-3); box-shadow: var(--shadow-hover), var(--spec-edge);
  color: var(--text); opacity: 1;
}
.game-preview {
  height: 180px; display: flex; align-items: center; justify-content: center;
  font-size: 5rem; position: relative; overflow: hidden;
  border-bottom: 1px solid var(--stroke-1);
}
.game-preview-flappy  { background: linear-gradient(145deg, oklch(0.55 0.17 220 / 0.3), oklch(0.50 0.17 265 / 0.15)); }
.game-preview-dino    { background: linear-gradient(145deg, oklch(0.55 0.17 155 / 0.3), oklch(0.55 0.17 200 / 0.15)); }
.game-preview-snake   { background: linear-gradient(145deg, oklch(0.55 0.17 330 / 0.3), oklch(0.55 0.17 290 / 0.15)); }
.game-preview-tetris  { background: linear-gradient(145deg, oklch(0.55 0.17 260 / 0.3), oklch(0.55 0.17 300 / 0.15)); }
.game-preview-2048    { background: linear-gradient(145deg, oklch(0.60 0.17 45 / 0.3), oklch(0.60 0.17 85 / 0.15)); }
.game-icon { font-size: 3.2rem; margin-bottom: 14px; display: block; }
.fun-btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 10px;
  padding: 18px 44px; font-size: 17px; font-weight: 600; font-family: var(--font);
  border: 1px solid var(--stroke-2); border-radius: var(--r-pill); cursor: pointer;
  background: var(--glass-3); backdrop-filter: var(--blur-heavy); -webkit-backdrop-filter: var(--blur-heavy);
  color: var(--text); box-shadow: var(--shadow-glass), var(--spec-edge);
  transition: var(--transition); letter-spacing: -0.01em; margin: 24px 0;
}
.fun-btn:hover { transform: translateY(-2px); background: var(--glass-4); box-shadow: var(--shadow-hover), var(--spec-edge); }
.fun-btn:active { transform: scale(0.97); }

/* ===== HTML EDITOR ===== */
.editor-layout {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0;
  height: calc(100vh - 220px); min-height: 500px;
  border: 1px solid var(--stroke-2); border-radius: var(--r-lg); overflow: hidden;
  box-shadow: var(--shadow-glass);
}
.editor-pane {
  display: flex; flex-direction: column;
  background: var(--glass-2); backdrop-filter: var(--blur);
  border-right: 1px solid var(--stroke-1);
}
.editor-pane:last-child { border-right: none; }
.editor-toolbar {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  background: var(--glass-3); border-bottom: 1px solid var(--stroke-1); flex-shrink: 0;
}
.editor-textarea {
  flex: 1; width: 100%; padding: 16px;
  background: rgba(0,0,0,0.3); color: var(--text);
  font-family: var(--font-mono); font-size: 13px; line-height: 1.7;
  border: none; outline: none; resize: none; tab-size: 2;
}
.editor-iframe { width: 100%; height: 100%; border: none; background: #fff; }

/* ===== CONTACT ===== */
.contact-widget {
  background: var(--glass-2); backdrop-filter: var(--blur-heavy);
  border: 1px solid var(--stroke-2); border-radius: var(--r-xl);
  padding: 36px; max-width: 640px;
  box-shadow: var(--shadow-glass), var(--spec-edge);
}
.contact-success { text-align: center; padding: 40px 20px; }
.toast-success { border-color: var(--success); }
.toast-error   { border-color: var(--danger); }

/* ===== CANVAS (games) ===== */
.game-wrap { display: flex; flex-direction: column; align-items: center; gap: 16px; }
canvas {
  display: block; border-radius: var(--r-md);
  border: 1px solid var(--stroke-2); max-width: 100%;
  box-shadow: var(--shadow-glass);
}
.score-display {
  font-size: 1.4rem; font-weight: 500; font-family: var(--font);
  color: var(--text); font-variant-numeric: tabular-nums; letter-spacing: -0.02em;
}

/* ===== TWEAKS PANEL ===== */
#tweaks-panel {
  position: fixed; bottom: 20px; right: 20px; z-index: 9998;
  width: 300px; padding: 18px;
  background: var(--glass-4);
  backdrop-filter: var(--blur-ultra);
  -webkit-backdrop-filter: var(--blur-ultra);
  border: 1px solid var(--stroke-3);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-hover), var(--spec-edge);
  font-family: var(--font); color: var(--text); display: none;
}
#tweaks-panel.open { display: block; }
#tweaks-panel h4 {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.14em;
  color: var(--text-muted); margin-bottom: 14px; font-weight: 600;
}
#tweaks-panel .tweak-row { margin-bottom: 14px; }
#tweaks-panel .tweak-label {
  font-size: 11.5px; color: var(--text-muted); font-weight: 500;
  letter-spacing: -0.01em; margin-bottom: 6px;
  display: flex; justify-content: space-between;
}
#tweaks-panel .tweak-label span:last-child { color: var(--text); font-variant-numeric: tabular-nums; }

/* ===== RESPONSIVE ===== */
@media (max-width: 820px) {
  .site-header { top: 12px; }
  .main-nav { display: none; }
  .main-nav.open {
    display: flex; position: absolute; top: 52px; left: 50%; transform: translateX(-50%);
    flex-direction: column; gap: 2px; padding: 8px;
    background: var(--glass-4); backdrop-filter: var(--blur-heavy);
    border: 1px solid var(--stroke-2); border-radius: var(--r-lg);
    box-shadow: var(--shadow-glass);
  }
  .menu-toggle { display: flex; align-items: center; justify-content: center; }
  .form-row, .form-row-3 { grid-template-columns: 1fr; }
  .tool-widget { padding: 22px 18px; }
  .countdown-display { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-links { align-items: flex-start; }
  .tools-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
  .tool-page { padding: 100px 0 60px; }
  .static-page { padding: 100px 0 60px; }
  .result-value { font-size: 34px; }
  #tweaks-panel { width: calc(100% - 40px); }
}
@media (max-width: 480px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
  .time-unit .t-num { font-size: 2rem; }
  .tool-card { padding: 16px 14px; }
  .result-grid { grid-template-columns: 1fr 1fr; }
  .hero { padding: 100px 0 40px; }
}

/* ===== BACKWARDS-COMPAT ALIASES (legacy pages) ===== */
:root {
  --card:      var(--glass-2);
  --card-hover:var(--glass-3);
  --border:    var(--stroke-1);
  --border-hover: var(--stroke-2);
  --input-bg:  var(--glass-1);
  --radius-xs: var(--r-xs);
  --radius-sm: var(--r-sm);
  --radius-md: var(--r-md);
  --radius-lg: var(--r-lg);
  --radius-xl: var(--r-xl);
  --radius-full: var(--r-pill);
}