/* ====================================
   CheckArch Shared Styles (Optimized)
   - Extracted from inline styles
   - Performance optimized
   ==================================== */

/* === VARIABLES === */
:root {
  /* Core neutrals */
  --bg: #060811;
  --card-bg: #0c0f1a;
  --card-bg-2: #0f1422;
  --bg-elev-1: rgba(255,255,255,0.055);
  --bg-elev-2: rgba(255,255,255,0.085);
  --stroke: rgba(255,255,255,0.12);
  --stroke-strong: rgba(255,255,255,0.22);

  /* Glass surface - OPTIMIZED: reduced blur */
  --glass-blur: 20px;
  --glass-sat: 1.4;
  --glass-bg: rgba(255,255,255,0.075);
  --glass-bg-strong: rgba(255,255,255,0.11);
  --glass-bg-soft: rgba(255,255,255,0.05);
  --glass-highlight: rgba(255,255,255,0.22);
  --glass-highlight-soft: rgba(255,255,255,0.12);
  --glass-shadow: 0 18px 60px rgba(0,0,0,0.50);
  --glass-shadow-soft: 0 12px 32px rgba(0,0,0,0.34);
  --ring: rgba(76,195,255,0.45);

  /* Text */
  --text: rgba(255,255,255,0.98);
  --text-2: rgba(255,255,255,0.84);
  --text-3: rgba(255,255,255,0.62);

  /* Accent colors */
  --a1: #7C5CFF;
  --a2: #4CC3FF;
  --a3: #FF4FD8;
  --a4: #7BFFB0;

  --accent: var(--a2);
  --accent-2: var(--a1);

  --shadow: var(--glass-shadow);
  --shadow-soft: var(--glass-shadow-soft);

  /* Semantic colors (added 2026-01-30) */
  --success: var(--a4);           /* #7BFFB0 - green */
  --warning: #FFD166;             /* yellow */
  --error: #FF6B6B;               /* red */
  --info: var(--a2);              /* #4CC3FF - cyan */

  /* Status indicators */
  --status-online: #7BFFB0;
  --status-offline: rgba(255,255,255,0.3);
  --status-busy: #FFD166;
  --status-error: #FF6B6B;

  /* Corners */
  --radius-xl: 24px;
  --radius-lg: 17px;
  --radius-md: 13px;
  --radius-sm: 10px;

  --container: 1240px;
  --nav-h: 74px;

  /* Timing */
  --ease: cubic-bezier(.2,.8,.2,1);
}

/* === PERFORMANCE MODE === */
html.lite {
  --glass-blur: 10px;
  --glass-sat: 1.1;
}
html.lite .corner-glow { display: none !important; }
html.lite .mesh { animation: none !important; filter: blur(8px) saturate(1.05) !important; }
html.lite .news-skeleton { animation: none !important; }

/* Performance mode: disable heavy backdrop-filter (added 2026-01-30) */
html.performance-mode .nav-inner,
html.performance-mode .card,
html.performance-mode .modal,
html.performance-mode .sheet .panel,
html.performance-mode .btn {
  backdrop-filter: none !important;
  -webkit-backdrop-filter: none !important;
  background: var(--glass-bg-strong) !important;
}

@media (prefers-reduced-motion: reduce) {
  .mesh, .corner-glow, .news-skeleton { animation: none !important; }
  .corner-glow { display: none !important; }
  html { scroll-behavior: auto; }
  .reveal { transition: none; }
  .card, .step, .btn, .nav-links a { transition: none; }
  .btn::after { transition: none; }
}

@media (prefers-reduced-transparency: reduce) {
  * { backdrop-filter: none !important; -webkit-backdrop-filter: none !important; }
}

/* === LIGHT MODE === */
@media (prefers-color-scheme: light) {
  :root {
    --bg: #f6f7fb;
    --card-bg: #ffffff;
    --card-bg-2: #f4f6fb;
    --bg-elev-1: rgba(0,0,0,0.035);
    --bg-elev-2: rgba(0,0,0,0.055);
    --stroke: rgba(0,0,0,0.10);
    --stroke-strong: rgba(0,0,0,0.18);

    --glass-blur: 18px;
    --glass-sat: 1.2;
    --glass-bg: rgba(255,255,255,0.62);
    --glass-bg-strong: rgba(255,255,255,0.75);
    --glass-bg-soft: rgba(255,255,255,0.46);
    --glass-highlight: rgba(255,255,255,0.75);
    --glass-highlight-soft: rgba(255,255,255,0.55);
    --glass-shadow: 0 18px 60px rgba(0,0,0,0.12);
    --glass-shadow-soft: 0 12px 32px rgba(0,0,0,0.10);
    --ring: rgba(0,122,255,0.35);

    --text: rgba(0,0,0,0.94);
    --text-2: rgba(0,0,0,0.74);
    --text-3: rgba(0,0,0,0.54);
  }
}

/* === MANUAL THEME OVERRIDE (UI toggle) === */
html[data-ui-theme="light"] {
  --bg: #f6f7fb;
  --card-bg: #ffffff;
  --card-bg-2: #f4f6fb;
  --bg-elev-1: rgba(0,0,0,0.035);
  --bg-elev-2: rgba(0,0,0,0.055);
  --stroke: rgba(0,0,0,0.10);
  --stroke-strong: rgba(0,0,0,0.18);

  --glass-blur: 18px;
  --glass-sat: 1.2;
  --glass-bg: rgba(255,255,255,0.62);
  --glass-bg-strong: rgba(255,255,255,0.75);
  --glass-bg-soft: rgba(255,255,255,0.46);
  --glass-highlight: rgba(255,255,255,0.75);
  --glass-highlight-soft: rgba(255,255,255,0.55);
  --glass-shadow: 0 18px 60px rgba(0,0,0,0.12);
  --glass-shadow-soft: 0 12px 32px rgba(0,0,0,0.10);
  --ring: rgba(0,122,255,0.35);

  --text: rgba(0,0,0,0.94);
  --text-2: rgba(0,0,0,0.74);
  --text-3: rgba(0,0,0,0.54);
}

html[data-ui-theme="dark"] {
  /* Force dark theme regardless of system preference */
  --bg: #060811;
  --card-bg: #0c0f1a;
  --card-bg-2: #0f1422;
  --bg-elev-1: rgba(255,255,255,0.055);
  --bg-elev-2: rgba(255,255,255,0.085);
  --stroke: rgba(255,255,255,0.12);
  --stroke-strong: rgba(255,255,255,0.22);

  --glass-blur: 20px;
  --glass-sat: 1.4;
  --glass-bg: rgba(255,255,255,0.075);
  --glass-bg-strong: rgba(255,255,255,0.11);
  --glass-bg-soft: rgba(255,255,255,0.05);
  --glass-highlight: rgba(255,255,255,0.22);
  --glass-highlight-soft: rgba(255,255,255,0.12);
  --glass-shadow: 0 18px 60px rgba(0,0,0,0.50);
  --glass-shadow-soft: 0 12px 32px rgba(0,0,0,0.34);
  --ring: rgba(76,195,255,0.45);

  --text: rgba(255,255,255,0.98);
  --text-2: rgba(255,255,255,0.84);
  --text-3: rgba(255,255,255,0.62);
}

/* === RESET === */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Manrope", system-ui, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.55;
  overflow-x: hidden;
  text-rendering: geometricPrecision;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* === BACKGROUND (OPTIMIZED) === */
.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

/* OPTIMIZED: Static mesh gradient, no animation by default */
.mesh {
  position: absolute;
  inset: -20%;
  background:
    radial-gradient(800px 600px at 15% 10%, rgba(124,92,255,0.30) 0%, transparent 55%),
    radial-gradient(700px 500px at 85% 20%, rgba(76,195,255,0.25) 0%, transparent 55%),
    radial-gradient(800px 600px at 75% 85%, rgba(255,79,216,0.22) 0%, transparent 55%),
    radial-gradient(800px 600px at 20% 80%, rgba(123,255,176,0.18) 0%, transparent 55%);
  filter: blur(12px) saturate(1.15);
  transform: translateZ(0);
  opacity: 0.9;
  /* Animation disabled for performance - enable via .mesh-animated class */
}

.mesh-animated {
  animation: meshFloat 25s ease-in-out infinite;
}

@keyframes meshFloat {
  0%, 100% { transform: translate3d(0,0,0) scale(1); }
  50% { transform: translate3d(-1.5%, 1%, 0) scale(1.02); }
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.7' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='.4'/%3E%3C/svg%3E");
}

.grid {
  position: absolute;
  inset: 0;
  opacity: 0.08;
  background-image:
    linear-gradient(to bottom, rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(to right, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 80px 80px;
  mask-image: radial-gradient(circle at 50% 30%, rgba(0,0,0,1) 0%, rgba(0,0,0,0) 60%);
}

/* OPTIMIZED: Simplified corner glow - single animation, reduced opacity */
.corner-glow {
  position: absolute;
  width: min(60vmax, 800px);
  height: min(60vmax, 800px);
  border-radius: 999px;
  pointer-events: none;
  opacity: 0.25;
  filter: blur(40px);
  mix-blend-mode: screen;
  background: radial-gradient(circle,
    rgba(124,92,255,0.35) 0%,
    rgba(76,195,255,0.30) 35%,
    rgba(255,79,216,0.25) 65%,
    transparent 100%);
  /* Removed heavy conic-gradient and double animation */
}

.corner-glow.tl { top: -25vmax; left: -25vmax; }
.corner-glow.br { bottom: -25vmax; right: -25vmax; }
/* Hide other two corners for performance */
.corner-glow.tr, .corner-glow.bl { display: none; }

/* === LAYOUT === */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

section {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-h) + 56px) 0 96px;
  content-visibility: auto;
  contain-intrinsic-size: auto 100vh;
}

/* === NAVIGATION === */
.nav {
  position: fixed;
  top: 14px;
  left: 0; right: 0;
  z-index: 1000;
  display: flex;
  justify-content: center;
  pointer-events: none;
}

.nav-inner {
  pointer-events: auto;
  width: min(var(--container), calc(100% - 28px*2));
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, var(--glass-bg-strong), var(--glass-bg-soft));
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  border-radius: 22px;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.nav-inner::before {
  content: "";
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent 35%, rgba(255,255,255,0.05));
  opacity: 0.5;
  pointer-events: none;
  mix-blend-mode: overlay;
  z-index: 0;
}

.nav-inner > * {
  position: relative;
  z-index: 1;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: -0.02em;
  user-select: none;
  text-decoration: none;
  color: inherit;
}

.brand-mark {
  width: 38px; height: 38px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: transparent;
  box-shadow: 0 12px 30px rgba(76,195,255,0.20);
  border: 1px solid rgba(255,255,255,0.14);
  overflow: hidden;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
}

.brand small {
  display: block;
  color: var(--text-3);
  font-weight: 600;
  letter-spacing: 0;
  margin-top: -2px;
  font-size: 12px;
}

.nav-links {
  display: flex;
  gap: 10px;
  list-style: none;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 650;
  padding: 10px 12px;
  border-radius: 999px;
  transition: background .15s var(--ease), color .15s var(--ease);
}

.nav-links a:hover {
  background: var(--bg-elev-1);
  color: var(--text);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  text-decoration: none;
  border-radius: 999px;
  padding: 11px 14px;
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 13px;
  transition: transform .15s var(--ease), box-shadow .2s var(--ease), background .2s var(--ease), border-color .2s var(--ease);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, var(--glass-bg-strong), var(--glass-bg-soft));
  color: var(--text);
  cursor: pointer;
  user-select: none;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-1px);
  border-color: var(--stroke-strong);
  box-shadow: var(--shadow-soft);
}

.btn:active {
  transform: translateY(0) scale(0.99);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 4px color-mix(in oklab, var(--ring) 55%, transparent), var(--shadow-soft);
  border-color: color-mix(in oklab, var(--ring) 60%, var(--stroke-strong));
}

.btn-primary {
  border: 1px solid rgba(255,255,255,0.20);
  background: linear-gradient(135deg, rgba(124,92,255,0.55), rgba(76,195,255,0.50), rgba(255,79,216,0.40));
  box-shadow: 0 18px 44px rgba(76,195,255,0.18);
}

.nav-cta .btn-primary {
  padding: 13px 18px;
  font-size: 14px;
  font-weight: 900;
}

.btn-primary:hover {
  box-shadow: 0 22px 55px rgba(76,195,255,0.22);
}

.btn.btn-icon{
  padding: 11px 12px;
  min-width: 44px;
}

.btn-icon-glyph{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  line-height:1;
  font-size: 16px;
  transform: translateY(-0.5px);
}

.menu-btn { display: none; }

.kbd {
  font-variant-numeric: tabular-nums;
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 7px;
  border: 1px solid var(--stroke);
  background: var(--bg-elev-1);
  color: var(--text-2);
  font-size: 12px;
}

/* === TYPOGRAPHY === */
h1 {
  font-size: clamp(44px, 5.8vw, 86px);
  line-height: 1.03;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(30px, 3.8vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h3 {
  font-size: clamp(20px, 2.3vw, 30px);
  letter-spacing: -0.02em;
}

p {
  color: var(--text-2);
  font-size: clamp(16px, 1.35vw, 19px);
}

.muted { color: var(--text-3); }

.gradient-text {
  background: linear-gradient(90deg, var(--a2), var(--a1), var(--a3), var(--a4));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.rainbow-letters {
  font-weight: 900;
  letter-spacing: -0.02em;
}
.rainbow-letters span:nth-child(1) { color: #7c5cff; }
.rainbow-letters span:nth-child(2) { color: #4cc3ff; }
.rainbow-letters span:nth-child(3) { color: #7bffb0; }
.rainbow-letters span:nth-child(4) { color: #ff4fd8; }
.rainbow-letters span:nth-child(5) { color: #ffd166; }
.rainbow-letters span:nth-child(6) { color: #4cc3ff; }

/* === PILLS === */
.pill {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--bg-elev-1);
  border: 1px solid var(--stroke);
  color: var(--text-2);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: -0.01em;
  user-select: none;
}

/* === GRIDS === */
.grid-2 {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 26px;
  align-items: stretch;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* === CARDS === */
.card {
  background: linear-gradient(180deg, var(--glass-bg-strong), var(--glass-bg-soft));
  border: 1px solid var(--stroke);
  border-radius: var(--radius-xl);
  padding: 22px;
  box-shadow: var(--shadow-soft);
  position: relative;
  overflow: hidden;
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.card:hover {
  transform: translateY(-4px);
  border-color: var(--stroke-strong);
}

.card-title {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 10px;
}

.icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.06);
  flex: 0 0 auto;
}

.icon svg { width: 22px; height: 22px; opacity: 0.95; }

.card h4 {
  font-size: 18px;
  letter-spacing: -0.02em;
  margin-top: 2px;
  margin-bottom: 4px;
}

.card p { font-size: 14px; color: var(--text-2); }

/* === MOBILE SHEET === */
.sheet {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
  pointer-events: none;
}

.sheet.open { display: block; pointer-events: auto; }

.sheet .scrim {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  opacity: 0;
  transition: opacity .2s var(--ease);
}

.sheet.open .scrim { opacity: 1; }

.sheet .panel {
  position: absolute;
  top: 18px; left: 18px; right: 18px;
  border-radius: 17px;
  background: linear-gradient(180deg, var(--glass-bg-strong), var(--glass-bg-soft));
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  padding: 16px;
  transform: translateY(-12px);
  opacity: 0;
  transition: transform .25s var(--ease), opacity .25s var(--ease);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-sat));
  overflow: hidden;
}

.sheet.open .panel { transform: translateY(0); opacity: 1; }

.sheet .panel a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px;
  border-radius: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  border: 1px solid transparent;
}

.sheet .panel a:hover {
  background: var(--bg-elev-1);
  border-color: var(--stroke);
}

.sheet-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px 10px;
}

/* === HERO === */
.hero {
  padding-top: calc(var(--nav-h) + 76px);
}

.hero .container { position: relative; }

/* В hero правая колонка (новостной портал) чуть шире: ~3/7 vs 4/7 */
.hero .grid-2 {
  grid-template-columns: 3fr 4fr;
}

.brand-glow {
  position: relative;
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--text);
  text-shadow:
    0 0 18px rgba(124,92,255,0.85),
    0 0 32px rgba(76,195,255,0.75),
    0 0 48px rgba(255,79,216,0.5);
}

.hero-top {
  display: flex;
  flex-direction: column;
  gap: 22px;
  align-items: flex-start;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 6px;
}

.hero-lead {
  max-width: 860px;
  font-size: clamp(18px, 1.55vw, 24px);
  color: var(--text-2);
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 6px;
  align-items: center;
}

/* === HERO MOCK / PREVIEW === */
.hero-mock {
  border-radius: calc(var(--radius-xl) + 6px);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, var(--glass-bg-strong), var(--glass-bg-soft));
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

.mock-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(255,255,255,0.07), rgba(255,255,255,0.03));
}

.dots { display: flex; gap: 7px; }

.dot {
  width: 10px; height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.10);
}

.mock-body {
  padding: 18px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.mock-pane {
  border-radius: calc(var(--radius-lg) + 4px);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  padding: 14px;
  min-height: 260px;
  overflow: hidden;
  position: relative;
}

.hero-mock.news-mode .mock-pane {
  height: clamp(400px, 50vh, 550px);
  min-height: 0;
  padding: 16px;
  display: flex;
  flex-direction: column;
}

/* Site preview static image replacement for iframe */
.site-preview {
  border-radius: calc(var(--radius-md) + 2px);
  border: 1px solid var(--stroke);
  overflow: hidden;
  background: rgba(0,0,0,0.45);
  min-height: 200px;
  position: relative;
  flex: 1 1 auto;
}

.site-preview-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  background: #050816;
}

.site-preview-link {
  position: absolute;
  inset: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,0,0,0.4);
  opacity: 0;
  transition: opacity .2s var(--ease);
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  font-size: 14px;
}

.site-preview:hover .site-preview-link {
  opacity: 1;
}

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

.news-feed {
  display: flex;
  flex-direction: column;
  gap: 10px;
  height: 100%;
  min-height: 0;
  flex: 1 1 auto;
}

.news-status {
  padding: 8px 10px;
  border-radius: calc(var(--radius-md) + 2px);
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.04);
}

/* === STATS === */
.stats {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

/* Более компактные метрики внутри блока AI‑проверки */
.check-tool .stats {
  margin-top: 10px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}
.check-tool .stat {
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.check-tool .stat .v {
  font-size: 18px;
}
.check-tool .stat .l {
  font-size: 11px;
  line-height: 1.3;
}

/* Увеличенная основная кнопка в блоке AI‑проверки */
.check-tool .btn-primary {
  padding: 14px 22px;
  font-size: 14px;
}

.stat {
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  padding: 16px;
  position: relative;
  overflow: hidden;
}

.stat .v {
  font-weight: 900;
  font-variant-numeric: tabular-nums;
  font-size: 26px;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.stat .l {
  font-size: 12px;
  color: var(--text-3);
  font-weight: 700;
}

/* === STEPS === */
.steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  padding: 16px;
  transition: transform .2s var(--ease), border-color .2s var(--ease);
}

.step:hover {
  transform: translateX(6px);
  border-color: var(--stroke-strong);
}

.step .n {
  width: 40px; height: 40px;
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-weight: 900;
  background: conic-gradient(from 240deg, var(--a2), var(--a1), var(--a3), var(--a4), var(--a2));
  border: 1px solid rgba(255,255,255,0.16);
  flex: 0 0 auto;
}

.step h4 { margin-bottom: 4px; }
.step p { font-size: 13px; }

/* === SECTION HEADER === */
.section-head {
  margin-bottom: 26px;
}

.section-head p {
  max-width: 860px;
  margin-top: 10px;
}

/* === CHART === */
.chart {
  border-radius: var(--radius-xl);
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,0.04);
  padding: 16px;
  overflow: hidden;
}

.chart .cap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 10px;
}

.chart .cap .t {
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* === CONTACT === */
.contact {
  text-align: center;
}

.contact .actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.contact-grid {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.contact-item {
  min-width: 260px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(255,255,255,0.08), rgba(255,255,255,0.04));
  padding: 16px 18px;
  text-align: left;
}

.contact-item b {
  display: block;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 6px;
}

.contact-item a, .contact-item span {
  color: var(--text);
  font-weight: 800;
  text-decoration: none;
}

/* === SCROLL PROGRESS === */
.progress {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  z-index: 1002;
  background: linear-gradient(90deg, var(--a2), var(--a1), var(--a3), var(--a4));
}

/* === REVEAL ANIMATION === */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .7s var(--ease), transform .7s var(--ease);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* === BACK TO TOP === */
.to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  width: 46px; height: 46px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: color-mix(in oklab, var(--bg) 68%, transparent);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-soft);
  display: grid;
  place-items: center;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity .2s var(--ease), transform .2s var(--ease);
  z-index: 1000;
  cursor: pointer;
}

.to-top.show {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.to-top:hover {
  transform: translateY(-2px);
  border-color: var(--stroke-strong);
}

.to-top svg { width: 18px; height: 18px; }

/* === RESPONSIVE === */
@media (max-width: 980px) {
  .grid-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .menu-btn { display: inline-flex; }
  
  header.nav .brand-mark { display: none; }
  
  #menuBtn {
    width: 44px; height: 44px;
    padding: 0; min-width: 44px;
    font-size: 0; gap: 0;
  }
  #menuBtn .kbd { display: none; }
  #menuBtn::before {
    content: "≡";
    font-size: 22px;
    line-height: 1;
  }
  
  #authOpenBtn {
    width: 44px; height: 44px;
    padding: 0; min-width: 44px;
    font-size: 0; gap: 0;
  }
  #authOpenBtn::before {
    content: "⚙︎";
    font-size: 18px;
    line-height: 1;
  }
  
  .hero { padding-top: calc(var(--nav-h) + 60px); }
  .mock-body { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  :root {
    --glass-blur: 14px;
    --glass-sat: 1.2;
  }
  .corner-glow { display: none; }
  section { padding: calc(var(--nav-h) + 44px) 0 76px; }
  .stats { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }

  .hero-mock.news-mode .mock-pane {
    height: clamp(350px, 55vh, 480px);
  }

  /* Mobile optimization: reduce blur on all devices (added 2026-01-30) */
  :root {
    --glass-blur: 10px;
    --glass-sat: 1.15;
  }
}

/* Low-end device detection: disable backdrop-filter completely (added 2026-01-30) */
@media (max-width: 720px) and (max-resolution: 1.5dppx) {
  .nav-inner,
  .card,
  .modal,
  .sheet .panel {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background: var(--card-bg) !important;
  }
}

@media (pointer: coarse) {
  .btn:hover { transform: none; }
  .card:hover { transform: none; }
  .step:hover { transform: none; }
}

/* === LAZY LOADING === */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

img[loading="lazy"].loaded,
img[loading="lazy"]:not([data-src]) {
  opacity: 1;
}

/* ====================================
   SEMANTIC COLOR UTILITIES (2026-01-30)
   ==================================== */

/* === STATUS BADGES === */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.status-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: currentColor;
}

.status-badge.success {
  background: color-mix(in oklab, var(--success) 15%, transparent);
  color: var(--success);
  border: 1px solid color-mix(in oklab, var(--success) 30%, transparent);
}

.status-badge.warning {
  background: color-mix(in oklab, var(--warning) 15%, transparent);
  color: var(--warning);
  border: 1px solid color-mix(in oklab, var(--warning) 30%, transparent);
}

.status-badge.error {
  background: color-mix(in oklab, var(--error) 15%, transparent);
  color: var(--error);
  border: 1px solid color-mix(in oklab, var(--error) 30%, transparent);
}

.status-badge.info {
  background: color-mix(in oklab, var(--info) 15%, transparent);
  color: var(--info);
  border: 1px solid color-mix(in oklab, var(--info) 30%, transparent);
}

/* === ALERT MESSAGES === */
.alert {
  padding: 14px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin: 12px 0;
}

.alert-icon {
  font-size: 18px;
  flex-shrink: 0;
  margin-top: 1px;
}

.alert.success {
  background: color-mix(in oklab, var(--success) 10%, transparent);
  border: 1px solid color-mix(in oklab, var(--success) 25%, transparent);
  color: var(--text);
}

.alert.success .alert-icon { color: var(--success); }

.alert.warning {
  background: color-mix(in oklab, var(--warning) 10%, transparent);
  border: 1px solid color-mix(in oklab, var(--warning) 25%, transparent);
  color: var(--text);
}

.alert.warning .alert-icon { color: var(--warning); }

.alert.error {
  background: color-mix(in oklab, var(--error) 10%, transparent);
  border: 1px solid color-mix(in oklab, var(--error) 25%, transparent);
  color: var(--text);
}

.alert.error .alert-icon { color: var(--error); }

.alert.info {
  background: color-mix(in oklab, var(--info) 10%, transparent);
  border: 1px solid color-mix(in oklab, var(--info) 25%, transparent);
  color: var(--text);
}

.alert.info .alert-icon { color: var(--info); }

/* === FORM VALIDATION === */
.field-error {
  display: none;
  color: var(--error);
  font-size: 12px;
  margin-top: 4px;
  font-weight: 600;
}

input:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown) {
  border-color: var(--error);
  background: color-mix(in oklab, var(--error) 5%, transparent);
}

input:valid:not(:placeholder-shown):not([type="search"]),
textarea:valid:not(:placeholder-shown) {
  border-color: var(--success);
}

input[aria-invalid="true"],
textarea[aria-invalid="true"] {
  border-color: var(--error);
  background: color-mix(in oklab, var(--error) 5%, transparent);
}

input[aria-invalid="true"] + .field-error,
textarea[aria-invalid="true"] + .field-error {
  display: block;
}

/* === TEXT UTILITIES === */
.text-success { color: var(--success); }
.text-warning { color: var(--warning); }
.text-error { color: var(--error); }
.text-info { color: var(--info); }

/* === BACKGROUND UTILITIES === */
.bg-success { background: color-mix(in oklab, var(--success) 15%, transparent); }
.bg-warning { background: color-mix(in oklab, var(--warning) 15%, transparent); }
.bg-error { background: color-mix(in oklab, var(--error) 15%, transparent); }
.bg-info { background: color-mix(in oklab, var(--info) 15%, transparent); }