/* РеСмена design system — light adaptation of history patterns */

:root {
  --bg: #f4f7fb;
  --bg-2: #eef2f7;
  --surface: #ffffff;
  --surface-glass: rgba(255, 255, 255, 0.88);
  --border: rgba(15, 23, 42, 0.08);
  --border-accent: rgba(13, 148, 136, 0.35);
  --text: #0f172a;
  --muted: #64748b;
  --text-dim: #94a3b8;
  --accent: #0d9488;
  --accent-2: #0891b2;
  --accent-hover: #0f766e;
  --accent-soft: rgba(13, 148, 136, 0.1);
  --accent-glow: rgba(13, 148, 136, 0.12);
  --danger: #dc2626;
  --danger-soft: #fef2f2;
  --shadow: 0 1px 3px rgba(15, 23, 42, 0.06), 0 12px 32px rgba(15, 23, 42, 0.08);
  --radius: 16px;
  --radius-sm: 10px;
  --max-width: 920px;
  --max-width-wide: 1100px;
  --hero-gradient: linear-gradient(135deg, #ffffff 0%, #f0fdfa 55%, #ecfeff 100%);
  --zone-ok: #0d9488;
  --zone-warn: #d97706;
  --zone-risk: #dc2626;
  --zone-neutral: #64748b;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --glass-shadow: rgba(15, 23, 42, 0.06);
  --gradient-brand: linear-gradient(135deg, var(--accent), var(--accent-2));
  --glow-teal: rgba(13, 148, 136, 0.25);
  --telegram: #2aabee;
  --font: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  position: relative;
}

/* ── Page atmosphere (orbs + grain) ── */
.ds-page-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ds-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.35;
  animation: floatOrb 12s infinite alternate ease-in-out;
}

.ds-orb-1 {
  width: 420px;
  height: 420px;
  background: var(--accent);
  top: -120px;
  left: -80px;
}

.ds-orb-2 {
  width: 340px;
  height: 340px;
  background: var(--accent-2);
  bottom: 10%;
  right: -60px;
  animation-delay: -5s;
}

.ds-orb-3 {
  width: 280px;
  height: 280px;
  background: #5eead4;
  top: 45%;
  left: 35%;
  opacity: 0.2;
  animation-delay: -8s;
}

@keyframes floatOrb {
  0% { transform: translate(0, 0) scale(1); }
  100% { transform: translate(50px, 40px) scale(1.08); }
}

.ds-grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 1;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  background-size: 256px;
}

.ds-reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  z-index: 110;
  background: var(--gradient-brand);
  transition: width 0.1s linear;
}

body.has-page-bg .site-header,
body.has-page-bg .main-content,
body.has-page-bg .site-footer {
  position: relative;
  z-index: 2;
}

.ds-gradient-text {
  background: var(--gradient-brand);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Nav blur ── */
.site-header {
  background: var(--surface-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.site-header.is-scrolled {
  box-shadow: 0 4px 24px var(--glass-shadow);
  border-bottom-color: var(--border-accent);
}

/* ── Section typography ── */
.ds-section-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin: 0 0 12px;
}

.ds-section-title {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin: 0 0 1.25rem;
  color: var(--text);
}

.ds-divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
  margin: 0;
}

/* ── Hero ── */
.ds-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 2.5rem;
}

.ds-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, var(--accent-glow) 0%, transparent 70%),
    radial-gradient(ellipse 50% 40% at 90% 100%, rgba(8, 145, 178, 0.08) 0%, transparent 60%),
    var(--hero-gradient);
  pointer-events: none;
}

.ds-hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 25%, transparent 75%);
  pointer-events: none;
}

.ds-hero .landing-hero-inner,
.ds-hero > *:not(.ds-hero-bg):not(.ds-hero-grid) {
  position: relative;
  z-index: 1;
}

.ds-hero h1 {
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.12;
}

/* ── Facts strip ── */
.ds-facts-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
  margin: 1.5rem 0;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.ds-fact-item {
  padding: 1.25rem 1rem;
  text-align: center;
  border-right: 1px solid var(--border);
  transition: var(--transition);
}

.ds-fact-item:last-child {
  border-right: none;
}

.ds-fact-item:hover {
  background: var(--accent-soft);
}

.ds-fact-num {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--accent);
  line-height: 1;
}

.ds-fact-label {
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ── Lead block ── */
.ds-lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--text);
  border-left: 3px solid var(--accent);
  padding: 0.5rem 0 0.5rem 1.5rem;
  margin: 0 0 1rem;
  max-width: 720px;
}

/* ── Glass cards ── */
.ds-glass-card {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 20px var(--glass-shadow);
  transform-style: preserve-3d;
}

.ds-glass-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--accent-soft) 0%, transparent 55%);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  pointer-events: none;
}

.ds-glass-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-4px);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.1);
}

.ds-glass-card:hover::before {
  opacity: 1;
}

/* ── Highlight box ── */
.ds-highlight-box {
  background: var(--accent-soft);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius);
  padding: 1.5rem 1.75rem;
}

.ds-highlight-box p {
  margin: 0;
  color: #134e4a;
  line-height: 1.65;
}

.ds-highlight-box p + p {
  margin-top: 0.75rem;
}

/* ── Reveal animations ── */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

.reveal-delay-1 { transition-delay: 0.08s; }
.reveal-delay-2 { transition-delay: 0.16s; }
.reveal-delay-3 { transition-delay: 0.24s; }
.reveal-delay-4 { transition-delay: 0.32s; }

/* ── Buttons enhanced ── */
.btn-primary {
  box-shadow: 0 4px 14px var(--glow-teal);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(13, 148, 136, 0.35);
}

.btn-glow {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.75rem;
  border-radius: 100px;
  font-weight: 700;
  text-decoration: none;
  border: none;
  cursor: pointer;
  color: #fff;
  background: var(--gradient-brand);
  box-shadow: 0 6px 20px var(--glow-teal);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  overflow: hidden;
  z-index: 0;
}

.btn-glow::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
  transform: translateX(-100%);
  transition: transform 0.55s ease;
}

.btn-glow::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 100px;
  background: var(--gradient-brand);
  z-index: -1;
  opacity: 0;
  filter: blur(10px);
  transition: opacity 0.3s ease;
}

.btn-glow:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px var(--glow-teal);
  text-decoration: none;
  color: #fff;
}

.btn-glow:hover::before {
  transform: translateX(100%);
}

.btn-glow:hover::after {
  opacity: 1;
}

.btn-secondary {
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth), border-color var(--transition-smooth);
}

.btn-secondary:hover {
  border-color: var(--border-accent);
  box-shadow: 0 4px 16px var(--accent-soft);
  transform: translateY(-2px);
}

.btn-telegram {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.85rem 1.5rem;
  border-radius: var(--radius);
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
  background: linear-gradient(135deg, rgba(42, 171, 238, 0.08), rgba(42, 171, 238, 0.04));
  border: 1px solid rgba(42, 171, 238, 0.35);
  transition: var(--transition-smooth);
}

.btn-telegram:hover {
  background: var(--telegram);
  color: #fff;
  transform: translateY(-4px);
  box-shadow: 0 16px 32px rgba(42, 171, 238, 0.3);
  text-decoration: none;
}

.site-nav .nav-cta {
  background: var(--gradient-brand);
  box-shadow: 0 4px 14px var(--glow-teal);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.site-nav .nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 22px var(--glow-teal);
}

/* ── Cards (shared) ── */
.card {
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.disclaimer-box {
  border-radius: var(--radius-sm);
}

/* ── Cookie banner ── */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  padding: 0.85rem 1rem;
  background: var(--surface-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 24px rgba(15, 23, 42, 0.08);
}

.cookie-banner[hidden] {
  display: none;
}

.cookie-banner-inner {
  max-width: var(--max-width-wide);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.cookie-banner-text {
  margin: 0;
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.55;
  flex: 1;
  min-width: 220px;
}

.cookie-banner-text a {
  color: var(--accent);
  font-weight: 600;
}

.cookie-banner-btn {
  flex-shrink: 0;
  padding: 0.55rem 1.25rem;
  font-size: 0.9rem;
}

body.cookie-visible.landing-page {
  padding-bottom: 5.5rem;
}

@media (max-width: 720px) {
  body.cookie-visible.landing-page {
    padding-bottom: 9rem;
  }

  .cookie-banner-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .cookie-banner-btn {
    width: 100%;
  }
}

@media (max-width: 720px) {
  .ds-facts-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .ds-fact-item:nth-child(2) {
    border-right: none;
  }

  .ds-fact-item:nth-child(1),
  .ds-fact-item:nth-child(2) {
    border-bottom: 1px solid var(--border);
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .ds-glass-card:hover,
  .btn-glow:hover,
  .btn-secondary:hover,
  .btn-telegram:hover {
    transform: none;
  }

  .ds-orb {
    animation: none;
  }

  .btn-glow::before {
    display: none;
  }
}