/* ===== Variables ===== */
:root {
  --bg-dark: #0a0e1a;
  --bg-card: rgba(15, 23, 42, 0.72);
  --bg-card-hover: rgba(22, 34, 58, 0.9);
  --accent-gold: #c9a24a;
  --accent-gold-bright: #e7c76c;
  --accent-teal: #2dd4bf;
  --accent-purple: #a855f7;
  --accent-blue: #3b82f6;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --gradient-hero: linear-gradient(135deg, #0a0e1a 0%, #1a1408 40%, #0d1f1a 70%, #0a0e1a 100%);
  --gradient-btn: linear-gradient(135deg, var(--accent-gold), var(--accent-teal));
  --gradient-btn-hover: linear-gradient(135deg, #d4b05c, #5eead4);
  --shadow-glow: 0 0 40px rgba(201, 162, 74, 0.22);
  --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.45);
  --border-subtle: rgba(201, 162, 74, 0.15);
  --radius: 18px;
  --header-h: 72px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  font-family: var(--font);
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container { width: 100%; max-width: 1180px; margin: 0 auto; padding: 0 20px; }
.section { padding: 100px 0; position: relative; }
.section__header { text-align: center; margin-bottom: 48px; }

.section__label {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-gold-bright);
  background: rgba(201, 162, 74, 0.1);
  border: 1px solid rgba(201, 162, 74, 0.25);
  margin-bottom: 16px;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-gold-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section__subtitle {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.btn--primary {
  background: var(--gradient-btn);
  color: #0a0e1a;
  box-shadow: 0 4px 24px rgba(201, 162, 74, 0.35);
}

.btn--primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-btn-hover);
  opacity: 0;
  transition: opacity var(--transition);
}

.btn--primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 36px rgba(45, 212, 191, 0.4);
}

.btn--primary:hover::before { opacity: 1; }
.btn--primary { z-index: 1; }

.btn--lg { padding: 16px 40px; font-size: 1.0625rem; }

.btn--card {
  padding: 10px 22px;
  font-size: 0.875rem;
  background: rgba(201, 162, 74, 0.08);
  border: 1px solid rgba(201, 162, 74, 0.28);
  color: var(--accent-gold-bright);
  border-radius: 50px;
  margin-top: auto;
  align-self: flex-start;
  transition: var(--transition);
}

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(10, 14, 26, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background var(--transition), box-shadow var(--transition);
}

.header--scrolled {
  background: rgba(10, 14, 26, 0.96);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
}

.header__inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.125rem; }
.logo__icon { font-size: 1.5rem; filter: drop-shadow(0 0 8px rgba(201, 162, 74, 0.5)); }
.logo__accent { color: var(--accent-gold-bright); }

.nav { display: flex; gap: 28px; }
.nav__link { font-size: 0.9375rem; color: var(--text-secondary); transition: color var(--transition); position: relative; }
.nav__link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--gradient-btn);
  transition: width var(--transition);
}
.nav__link:hover { color: var(--text-primary); }
.nav__link:hover::after { width: 100%; }
.nav__link--accent { color: var(--accent-gold-bright); }

.burger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.burger span { display: block; width: 24px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: var(--transition); }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu { display: none; flex-direction: column; padding: 16px 20px 24px; background: rgba(10, 14, 26, 0.98); border-bottom: 1px solid var(--border-subtle); }
.mobile-menu.is-open { display: flex; }
.mobile-menu__link { padding: 12px 0; font-size: 1rem; color: var(--text-secondary); border-bottom: 1px solid rgba(255,255,255,0.05); transition: color var(--transition); }
.mobile-menu__link:hover { color: var(--accent-gold-bright); }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  overflow: hidden;
  padding-top: var(--header-h);
}

.hero__particles { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }

.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  animation: float 9s ease-in-out infinite;
}

.hero__glow--1 { width: 520px; height: 520px; background: rgba(201, 162, 74, 0.14); top: -12%; right: -6%; }
.hero__glow--2 { width: 420px; height: 420px; background: rgba(45, 212, 191, 0.12); bottom: -6%; left: -6%; animation-delay: -4.5s; }

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(24px, -24px) scale(1.06); }
}

.hero__content { position: relative; z-index: 2; text-align: center; max-width: 820px; padding: 40px 20px 80px; }

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 50px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--accent-teal);
  background: rgba(45, 212, 191, 0.1);
  border: 1px solid rgba(45, 212, 191, 0.25);
  margin-bottom: 24px;
}

.hero__badge-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-teal);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.hero__title {
  font-size: clamp(2rem, 6vw, 3.4rem);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 0%, var(--accent-gold-bright) 45%, var(--accent-teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--text-secondary);
  margin-bottom: 40px;
  max-width: 660px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.75;
}

.hero__scroll-hint { position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); z-index: 2; }
.hero__scroll-dot { display: block; width: 24px; height: 40px; border: 2px solid rgba(201, 162, 74, 0.4); border-radius: 12px; position: relative; }
.hero__scroll-dot::after {
  content: '';
  position: absolute;
  top: 6px; left: 50%;
  transform: translateX(-50%);
  width: 4px; height: 8px;
  background: var(--accent-gold-bright);
  border-radius: 2px;
  animation: scroll-bounce 2s ease-in-out infinite;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: 1; }
  50% { transform: translateX(-50%) translateY(12px); opacity: 0.3; }
}

.fade-in { opacity: 0; transform: translateY(24px); animation: fadeInUp 0.8s ease forwards; }
.fade-in--delay-1 { animation-delay: 0.2s; }
.fade-in--delay-2 { animation-delay: 0.4s; }
@keyframes fadeInUp { to { opacity: 1; transform: translateY(0); } }

.reveal { opacity: 0; transform: translateY(36px); transition: opacity 0.65s ease, transform 0.65s ease; }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

/* ===== Catalog ===== */
.catalog { background: linear-gradient(180deg, var(--bg-dark) 0%, #0c1528 50%, var(--bg-dark) 100%); }
.catalog.section[hidden] { display: none; }
.catalog--marketing { background: linear-gradient(180deg, var(--bg-dark) 0%, #0a1220 100%); }

.catalog__filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 10px 22px;
  border-radius: 50px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.is-active {
  color: var(--accent-gold-bright);
  border-color: rgba(201, 162, 74, 0.55);
  background: rgba(201, 162, 74, 0.12);
  box-shadow: 0 4px 16px rgba(201, 162, 74, 0.15);
}

.catalog__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 26px;
}

/* ===== Service cards with floating effect ===== */
.service-card {
  border-radius: var(--radius);
  perspective: 800px;
  animation: card-float 5s ease-in-out infinite;
}

.service-card:nth-child(2) { animation-delay: -0.8s; }
.service-card:nth-child(3) { animation-delay: -1.6s; }
.service-card:nth-child(4) { animation-delay: -2.4s; }
.service-card:nth-child(5) { animation-delay: -3.2s; }
.service-card:nth-child(6) { animation-delay: -0.4s; }
.service-card:nth-child(7) { animation-delay: -1.2s; }
.service-card:nth-child(8) { animation-delay: -2s; }
.service-card:nth-child(9) { animation-delay: -2.8s; }
.service-card:nth-child(10) { animation-delay: -3.6s; }

@keyframes card-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.service-card[hidden] { display: none; }

.service-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 240px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  padding: 28px 28px 26px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease, border-color 0.3s ease, background 0.3s ease;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  position: relative;
  overflow: hidden;
  transform-style: preserve-3d;
}

.service-card__link::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(201,162,74,0.5), rgba(45,212,191,0.3), rgba(168,85,247,0.2), rgba(201,162,74,0.5));
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s ease;
  animation: border-shimmer 4s linear infinite;
  pointer-events: none;
}

@keyframes border-shimmer {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.service-card__link::after {
  content: '';
  position: absolute;
  top: -50%; left: -60%;
  width: 50%; height: 200%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
  transform: rotate(25deg);
  transition: left 0.6s ease;
  pointer-events: none;
}

.service-card__link:hover {
  transform: translateY(-14px) scale(1.02);
  border-color: rgba(201, 162, 74, 0.45);
  box-shadow: var(--shadow-glow), var(--shadow-card), 0 0 0 1px rgba(201, 162, 74, 0.1);
  background: var(--bg-card-hover);
  animation: none;
}

.service-card:hover { animation: none; }

.service-card__link:hover::before { opacity: 1; }
.service-card__link:hover::after { left: 120%; }
.service-card__link:hover .btn--card {
  background: var(--gradient-btn);
  color: #0a0e1a;
  border-color: transparent;
  box-shadow: 0 4px 16px rgba(201, 162, 74, 0.3);
}
.service-card__link:hover .service-card__emoji {
  transform: scale(1.15) rotate(-6deg);
  box-shadow: 0 8px 28px rgba(201, 162, 74, 0.35);
}

.service-card__badge {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 2;
  padding: 4px 11px;
  border-radius: 50px;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(45, 212, 191, 0.12);
  color: var(--accent-teal);
  border: 1px solid rgba(45, 212, 191, 0.28);
}

.service-card__emoji {
  width: 60px; height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  border-radius: 16px;
  margin-bottom: 18px;
  position: relative;
  z-index: 1;
  background: rgba(201, 162, 74, 0.1);
  border: 1px solid rgba(201, 162, 74, 0.2);
  transition: transform 0.45s cubic-bezier(0.34, 1.56, 0.64, 1), box-shadow 0.4s ease;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.service-card__emoji--calc { background: rgba(59, 130, 246, 0.12); border-color: rgba(59, 130, 246, 0.25); }
.service-card__emoji--marketing { background: rgba(168, 85, 247, 0.12); border-color: rgba(168, 85, 247, 0.25); }

.service-card__body { display: flex; flex-direction: column; flex: 1; position: relative; z-index: 1; }
.service-card__title { font-size: 1.125rem; font-weight: 700; margin-bottom: 10px; color: var(--text-primary); line-height: 1.35; padding-right: 60px; }
.service-card__desc { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 20px; line-height: 1.65; flex: 1; }

/* ===== Advantages ===== */
.advantages { background: var(--bg-dark); }
.advantages__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 22px; }

.advantage-card {
  text-align: center;
  padding: 32px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius);
  transition: var(--transition);
  animation: card-float 6s ease-in-out infinite;
}

.advantage-card:nth-child(2) { animation-delay: -1.5s; }
.advantage-card:nth-child(3) { animation-delay: -3s; }
.advantage-card:nth-child(4) { animation-delay: -4.5s; }
.advantage-card:nth-child(5) { animation-delay: -2s; }

.advantage-card:hover {
  transform: translateY(-8px);
  border-color: rgba(201, 162, 74, 0.35);
  box-shadow: 0 12px 32px rgba(201, 162, 74, 0.18);
  animation: none;
}

.advantage-card__icon { width: 48px; height: 48px; margin: 0 auto 14px; color: var(--accent-gold-bright); }
.advantage-card__title { font-size: 1.0625rem; font-weight: 600; margin-bottom: 8px; }
.advantage-card__text { font-size: 0.9rem; color: var(--text-secondary); }

/* ===== CTA ===== */
.cta { padding: 80px 0; }

.cta__box {
  text-align: center;
  padding: 64px 40px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(201, 162, 74, 0.09), rgba(45, 212, 191, 0.09));
  border: 1px solid var(--border-subtle);
  position: relative;
  overflow: hidden;
}

.cta__box::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(201, 162, 74, 0.07) 0%, transparent 60%);
  animation: cta-pulse 7s ease-in-out infinite;
}

@keyframes cta-pulse {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(12%, 12%); }
}

.cta__title {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700;
  margin-bottom: 16px;
  position: relative;
  background: linear-gradient(135deg, var(--text-primary), var(--accent-gold-bright));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta__text { font-size: 1.05rem; color: var(--text-secondary); max-width: 580px; margin: 0 auto 32px; position: relative; line-height: 1.75; }
.cta__box .btn { position: relative; }

/* ===== Contacts ===== */
.contacts { background: linear-gradient(180deg, var(--bg-dark) 0%, #0c1222 100%); }
.contacts__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 20px; }

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 28px 20px;
  border-radius: var(--radius);
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  transition: var(--transition);
  text-align: center;
}

a.contact-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-card); }

.contact-card__icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; border-radius: 12px; padding: 10px; }
.contact-card__icon svg { width: 24px; height: 24px; }
.contact-card__label { font-size: 0.9375rem; font-weight: 600; color: var(--text-primary); }

.contact-card--max { border-color: rgba(255, 107, 157, 0.3); }
.contact-card--max .contact-card__icon { background: rgba(255, 107, 157, 0.15); color: #ff6b9d; }
.contact-card--max:hover { border-color: #ff6b9d; box-shadow: 0 8px 24px rgba(255, 107, 157, 0.2); }

.contact-card--tg { border-color: rgba(59, 130, 246, 0.3); }
.contact-card--tg .contact-card__icon { background: rgba(59, 130, 246, 0.15); color: #3b82f6; }
.contact-card--tg:hover { border-color: #3b82f6; box-shadow: 0 8px 24px rgba(59, 130, 246, 0.2); }

.contact-card--vk { border-color: rgba(0, 119, 255, 0.3); }
.contact-card--vk .contact-card__icon { background: rgba(0, 119, 255, 0.15); color: #0077ff; }
.contact-card--vk:hover { border-color: #0077ff; box-shadow: 0 8px 24px rgba(0, 119, 255, 0.2); }

.contact-card--email { border-color: rgba(201, 162, 74, 0.3); }
.contact-card--email .contact-card__icon { background: rgba(201, 162, 74, 0.15); color: var(--accent-gold-bright); }

.contact-card__email {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 50px;
  background: rgba(201, 162, 74, 0.08);
  border: 1px dashed rgba(201, 162, 74, 0.3);
  color: var(--accent-gold-bright);
  font-size: 0.875rem;
  font-weight: 500;
  transition: var(--transition);
}

.contact-card__email:hover { background: rgba(201, 162, 74, 0.15); border-style: solid; }
.contact-card__copy-icon { width: 16px; height: 16px; opacity: 0.6; }
.contact-card__copy-icon svg { width: 16px; height: 16px; }

.contact-card__copied { font-size: 0.8125rem; color: #4ade80; opacity: 0; transform: translateY(4px); transition: var(--transition); }
.contact-card__copied.is-shown { opacity: 1; transform: translateY(0); }

/* ===== Footer ===== */
.footer { padding: 48px 0 32px; border-top: 1px solid var(--border-subtle); background: #060a14; }
.footer__inner { text-align: center; }
.footer__links { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; gap: 8px 16px; margin-bottom: 24px; }
.footer__links a { font-size: 0.875rem; color: var(--accent-gold-bright); transition: color var(--transition); }
.footer__links a:hover { color: var(--text-primary); text-decoration: underline; }
.footer__sep { color: var(--text-muted); }
.footer__disclaimer { font-size: 0.8125rem; color: var(--text-muted); line-height: 1.7; max-width: 800px; margin: 0 auto 20px; }
.footer__disclaimer a { color: var(--accent-gold-bright); text-decoration: underline; text-underline-offset: 2px; }
.footer__disclaimer a:hover { color: var(--text-primary); }
.footer__copy { font-size: 0.8125rem; color: var(--text-muted); }

@media (max-width: 768px) {
  .nav { display: none; }
  .burger { display: flex; }
  .section { padding: 72px 0; }
  .service-card__link { padding: 22px; min-height: 220px; }
  .service-card__title { padding-right: 0; }
  .cta__box { padding: 48px 24px; }
  .contacts__grid { grid-template-columns: 1fr; }
  .hero__glow--1 { width: 300px; height: 300px; }
  .hero__glow--2 { width: 250px; height: 250px; }
  .service-card { animation: none; }
  .advantage-card { animation: none; }
}

@media (max-width: 480px) {
  :root { --header-h: 64px; }
  .catalog__grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .fade-in, .reveal { animation: none; opacity: 1; transform: none; transition: none; }
  .hero__glow, .hero__scroll-dot::after, .cta__box::before, .service-card, .advantage-card { animation: none; }
  .service-card__link:hover { transform: translateY(-4px); }
  .service-card__link::before { animation: none; }
}