/* ============================================
   АРХИВ — Industrial Editorial Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@100;300;400;700;900&family=JetBrains+Mono:wght@400;700&display=swap');

:root {
  --black: #0f0f0f;
  --black-2: #1a1a1a;
  --black-3: #242424;
  --gold: #FFE600;
  --gold-dim: #b3a100;
  --white: #f0f0f0;
  --gray: #888888;
  --gray-light: #cccccc;
  --red: #FF3333;
  --nav-width: 220px;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: 'Inter', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--gold); }

/* ======================== SIDEBAR NAV ======================== */
.sidebar {
  position: fixed;
  left: 0; top: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--black-2);
  border-right: 1px solid #2a2a2a;
  display: flex;
  flex-direction: column;
  padding: 40px 0;
  z-index: 1000;
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
}

.sidebar-logo {
  padding: 0 28px 40px;
  border-bottom: 1px solid #2a2a2a;
}

.sidebar-logo .logo-text {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -1px;
  color: var(--white);
  text-decoration: none;
  display: block;
}

.sidebar-logo .logo-text span {
  color: var(--gold);
}

.sidebar-logo .logo-sub {
  font-size: 10px;
  font-weight: 300;
  letter-spacing: 3px;
  color: var(--gray);
  text-transform: uppercase;
  margin-top: 4px;
  font-family: 'JetBrains Mono', monospace;
}

.nav-links {
  flex: 1;
  padding: 32px 0;
  list-style: none;
}

.nav-links li {
  position: relative;
}

.nav-links li a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 28px;
  color: var(--gray);
  text-decoration: none;
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  transition: color 0.2s, background 0.2s;
}

.nav-links li a:hover,
.nav-links li a.active {
  color: var(--white);
  background: var(--black-3);
}

.nav-links li a.active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: var(--gold);
}

.nav-links li a .nav-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--gold);
  opacity: 0.7;
}

.sidebar-footer {
  padding: 24px 28px;
  border-top: 1px solid #2a2a2a;
  font-size: 10px;
  color: var(--gray);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
}

/* ---- MOBILE HAMBURGER ---- */
.hamburger {
  display: none;
  position: fixed;
  top: 20px; right: 20px;
  z-index: 1100;
  background: var(--gold);
  border: none;
  width: 44px; height: 44px;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--black);
  transition: transform 0.3s;
}

/* ======================== MAIN CONTENT ======================== */
.main-content {
  margin-left: var(--nav-width);
  min-height: 100vh;
}

/* ======================== HERO SECTION ======================== */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-rows: 1fr auto;
  padding: 80px 80px 60px;
  position: relative;
  overflow: hidden;
}

.hero-top {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 3px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 24px;
}

.hero-label::before {
  content: '';
  display: block;
  width: 30px; height: 1px;
  background: var(--gold);
}

.hero h1 {
  font-size: clamp(52px, 8vw, 96px);
  font-weight: 900;
  line-height: 0.92;
  letter-spacing: -4px;
  margin-bottom: 32px;
}

.hero h1 em {
  font-style: normal;
  color: var(--gold);
  display: block;
}

.hero-desc {
  font-size: 16px;
  font-weight: 300;
  color: var(--gray-light);
  line-height: 1.8;
  max-width: 420px;
  margin-bottom: 48px;
}

.btn-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gold);
  color: var(--black);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 16px 32px;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--gold-dim);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: transparent;
  color: var(--white);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 16px 32px;
  text-decoration: none;
  border: 1px solid #333;
  transition: border-color 0.2s, color 0.2s;
}

.btn-secondary:hover {
  border-color: var(--white);
}

/* ---- COMPRESSION VISUAL ---- */
.compression-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.compress-box {
  position: relative;
  width: 100%;
  max-width: 460px;
}

.compress-files {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 32px;
}

.file-bar {
  display: flex;
  align-items: center;
  gap: 12px;
}

.file-bar-name {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--gray);
  width: 120px;
  flex-shrink: 0;
}

.file-bar-track {
  flex: 1;
  height: 6px;
  background: var(--black-3);
  position: relative;
  overflow: hidden;
}

.file-bar-fill {
  height: 100%;
  background: var(--gold);
  animation: compressFill 3s ease-in-out infinite alternate;
}

.file-bar:nth-child(2) .file-bar-fill { animation-delay: 0.2s; background: #fff; }
.file-bar:nth-child(3) .file-bar-fill { animation-delay: 0.4s; background: var(--gold); }
.file-bar:nth-child(4) .file-bar-fill { animation-delay: 0.6s; background: #aaa; }
.file-bar:nth-child(5) .file-bar-fill { animation-delay: 0.8s; }

@keyframes compressFill {
  from { width: 100%; }
  to { width: 38%; }
}

.file-bar-size {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  color: var(--gold);
  width: 60px;
  text-align: right;
}

.compress-result {
  background: var(--black-3);
  border: 1px solid #2f2f2f;
  padding: 24px;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
  border-left: 3px solid var(--gold);
}

.compress-stat .stat-val {
  font-size: 28px;
  font-weight: 900;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  letter-spacing: -1px;
}

.compress-stat .stat-label {
  font-size: 10px;
  color: var(--gray);
  letter-spacing: 2px;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
  margin-top: 4px;
}

/* ---- HERO TICKER ---- */
.hero-ticker {
  border-top: 1px solid #2a2a2a;
  padding-top: 32px;
  margin-top: 60px;
  display: flex;
  gap: 60px;
  overflow: hidden;
}

.ticker-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  white-space: nowrap;
}

.ticker-num {
  font-size: 36px;
  font-weight: 900;
  color: var(--gold);
  letter-spacing: -2px;
}

.ticker-text {
  font-size: 12px;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-family: 'JetBrains Mono', monospace;
}

/* ======================== SECTION STYLES ======================== */
section {
  padding: 100px 80px;
}

section + section {
  border-top: 1px solid #1f1f1f;
}

.section-header {
  margin-bottom: 64px;
}

.section-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 4px;
  color: var(--gold);
  text-transform: uppercase;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}

.section-number::after {
  content: '';
  display: block;
  flex: 1;
  max-width: 60px;
  height: 1px;
  background: var(--gold);
  opacity: 0.4;
}

.section-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 900;
  letter-spacing: -2px;
  line-height: 1;
}

.section-title .accent { color: var(--gold); }

.section-subtitle {
  font-size: 16px;
  color: var(--gray);
  font-weight: 300;
  margin-top: 16px;
  max-width: 560px;
}

/* ======================== FEATURE GRID ======================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2px;
}

.feature-card {
  background: var(--black-2);
  padding: 40px 36px;
  position: relative;
  overflow: hidden;
  transition: background 0.3s;
}

.feature-card::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 2px;
  background: var(--gold);
  transition: width 0.4s ease;
}

.feature-card:hover { background: var(--black-3); }
.feature-card:hover::after { width: 100%; }

.feature-icon {
  width: 48px; height: 48px;
  background: var(--black-3);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
  font-size: 22px;
}

.feature-num {
  position: absolute;
  top: 20px; right: 24px;
  font-size: 72px;
  font-weight: 900;
  color: #ffffff08;
  font-variant-numeric: tabular-nums;
  line-height: 1;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.5px;
}

.feature-card p {
  font-size: 14px;
  color: var(--gray);
  line-height: 1.7;
  font-weight: 300;
}

/* ======================== HOW IT WORKS ======================== */
.steps-layout {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 80px;
  align-items: start;
}

.steps-nav {
  position: sticky;
  top: 40px;
}

.step-nav-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid #1f1f1f;
  cursor: pointer;
  color: var(--gray);
  transition: color 0.2s;
}

.step-nav-item.active, .step-nav-item:hover {
  color: var(--white);
}

.step-nav-item.active .step-dot {
  background: var(--gold);
}

.step-dot {
  width: 8px; height: 8px;
  background: #333;
  border-radius: 50%;
  flex-shrink: 0;
  transition: background 0.2s;
}

.step-nav-label {
  font-size: 13px;
  font-weight: 400;
}

.steps-content {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.step-panel {
  background: var(--black-2);
  padding: 48px;
}

.step-panel-num {
  font-size: 80px;
  font-weight: 900;
  color: var(--gold);
  line-height: 1;
  margin-bottom: 16px;
  letter-spacing: -4px;
  font-variant-numeric: tabular-nums;
}

.step-panel h3 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.step-panel p {
  font-size: 15px;
  color: var(--gray-light);
  font-weight: 300;
  line-height: 1.8;
  max-width: 520px;
}

.step-panel-detail {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step-detail-row {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--gray);
}

.step-detail-row::before {
  content: '→';
  color: var(--gold);
}

/* ======================== FORMAT TABLE ======================== */
.formats-table-wrap {
  overflow-x: auto;
}

.formats-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.formats-table thead th {
  padding: 16px 20px;
  text-align: left;
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  font-family: 'JetBrains Mono', monospace;
  border-bottom: 1px solid #2a2a2a;
  font-weight: 400;
}

.formats-table tbody tr {
  border-bottom: 1px solid #1a1a1a;
  transition: background 0.15s;
}

.formats-table tbody tr:hover {
  background: var(--black-2);
}

.formats-table tbody td {
  padding: 18px 20px;
  color: var(--gray-light);
  font-weight: 300;
}

.formats-table tbody td:first-child {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 700;
  color: var(--white);
  font-size: 13px;
}

.badge {
  display: inline-block;
  padding: 3px 10px;
  font-size: 10px;
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
  font-weight: 700;
  text-transform: uppercase;
}

.badge-gold { background: var(--gold); color: var(--black); }
.badge-outline { border: 1px solid #333; color: var(--gray); }
.badge-red { background: #ff333322; color: var(--red); border: 1px solid #ff333344; }

.check { color: var(--gold); font-size: 16px; }
.dash { color: #333; }

/* ======================== COMPARISON CARDS ======================== */
.compare-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
}

.compare-card {
  background: var(--black-2);
  padding: 48px 36px;
  position: relative;
  display: flex;
  flex-direction: column;
}

.compare-card.featured {
  background: var(--black-3);
  border-top: 3px solid var(--gold);
}

.compare-badge {
  position: absolute;
  top: -12px; right: 24px;
  background: var(--gold);
  color: var(--black);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 4px 12px;
  font-family: 'JetBrains Mono', monospace;
}

.compare-card .plan-name {
  font-size: 11px;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--gray);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 16px;
}

.compare-card .plan-price {
  font-size: 52px;
  font-weight: 900;
  letter-spacing: -3px;
  line-height: 1;
  margin-bottom: 8px;
}

.compare-card .plan-price sup {
  font-size: 20px;
  font-weight: 400;
  letter-spacing: 0;
  vertical-align: super;
}

.compare-card .plan-price.free {
  color: var(--gold);
}

.compare-card .plan-period {
  font-size: 12px;
  color: var(--gray);
  margin-bottom: 36px;
  font-family: 'JetBrains Mono', monospace;
}

.plan-features {
  list-style: none;
  flex: 1;
  margin-bottom: 36px;
}

.plan-features li {
  padding: 10px 0;
  border-bottom: 1px solid #1f1f1f;
  font-size: 13px;
  color: var(--gray-light);
  display: flex;
  align-items: center;
  gap: 10px;
}

.plan-features li .icon {
  color: var(--gold);
  flex-shrink: 0;
}

.plan-features li.disabled {
  color: #444;
}

.plan-features li.disabled .icon {
  color: #333;
}

/* ======================== CONTACT FORM ======================== */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
  align-items: start;
}

.contact-info {
  position: sticky;
  top: 40px;
}

.contact-info-item {
  margin-bottom: 36px;
}

.contact-info-label {
  font-size: 10px;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--gold);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 8px;
}

.contact-info-value {
  font-size: 15px;
  color: var(--gray-light);
  font-weight: 300;
}

.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-size: 11px;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--gray);
  font-family: 'JetBrains Mono', monospace;
  margin-bottom: 10px;
}

.form-control {
  width: 100%;
  background: var(--black-2);
  border: 1px solid #2a2a2a;
  color: var(--white);
  padding: 16px 20px;
  font-size: 15px;
  font-family: 'Inter', sans-serif;
  font-weight: 300;
  outline: none;
  transition: border-color 0.2s;
  -webkit-appearance: none;
  border-radius: 0;
}

.form-control:focus {
  border-color: var(--gold);
}

.form-control::placeholder {
  color: #444;
}

textarea.form-control {
  resize: vertical;
  min-height: 140px;
}

/* ======================== FOOTER ======================== */
.footer {
  border-top: 1px solid #1f1f1f;
  padding: 48px 80px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 32px;
  flex-wrap: wrap;
}

.footer-brand .logo-text {
  font-size: 18px;
  font-weight: 900;
  color: var(--white);
  text-decoration: none;
  display: block;
  letter-spacing: -1px;
}

.footer-brand .logo-text span { color: var(--gold); }

.footer-copy {
  font-size: 11px;
  color: var(--gray);
  font-family: 'JetBrains Mono', monospace;
  letter-spacing: 1px;
  margin-top: 6px;
}

.footer-links {
  display: flex;
  gap: 32px;
  list-style: none;
}

.footer-links a {
  font-size: 12px;
  color: var(--gray);
  text-decoration: none;
  letter-spacing: 1px;
  text-transform: uppercase;
  font-family: 'JetBrains Mono', monospace;
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--white); }

/* ======================== ABOUT SECTION ======================== */
.about-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-large-text {
  font-size: clamp(18px, 2.5vw, 28px);
  font-weight: 300;
  line-height: 1.7;
  color: var(--gray-light);
}

.about-large-text strong {
  color: var(--white);
  font-weight: 700;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3px;
}

.about-stat {
  background: var(--black-2);
  padding: 36px 28px;
}

.about-stat-val {
  font-size: 48px;
  font-weight: 900;
  letter-spacing: -3px;
  color: var(--gold);
  line-height: 1;
}

.about-stat-label {
  font-size: 11px;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-family: 'JetBrains Mono', monospace;
  margin-top: 8px;
}

/* ======================== MARQUEE ======================== */
.marquee-wrap {
  overflow: hidden;
  border-top: 1px solid #1f1f1f;
  border-bottom: 1px solid #1f1f1f;
  padding: 20px 0;
  background: var(--black-2);
}

.marquee-track {
  display: flex;
  gap: 0;
  animation: marqueeScroll 20s linear infinite;
  white-space: nowrap;
}

.marquee-track span {
  font-size: 13px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--gray);
  letter-spacing: 2px;
  padding: 0 40px;
  text-transform: uppercase;
}

.marquee-track span.accent { color: var(--gold); }

@keyframes marqueeScroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ======================== PAGE HEADER ======================== */
.page-header {
  padding: 80px 80px 60px;
  border-bottom: 1px solid #1f1f1f;
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: attr(data-title);
  position: absolute;
  right: 80px; top: 50%;
  transform: translateY(-50%);
  font-size: 180px;
  font-weight: 900;
  color: #ffffff04;
  letter-spacing: -10px;
  line-height: 1;
  pointer-events: none;
  text-transform: uppercase;
}

.page-header .section-number { margin-bottom: 20px; }

.page-header h1 {
  font-size: clamp(42px, 6vw, 80px);
  font-weight: 900;
  letter-spacing: -3px;
  line-height: 0.95;
}

.page-header p {
  font-size: 16px;
  color: var(--gray);
  font-weight: 300;
  margin-top: 20px;
  max-width: 560px;
  line-height: 1.7;
}

/* ======================== ANIMATIONS ======================== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ======================== RESPONSIVE ======================== */
@media (max-width: 1100px) {
  .steps-layout { grid-template-columns: 1fr; }
  .steps-nav { display: none; }
  .compare-grid { grid-template-columns: 1fr; max-width: 480px; }
  .about-split { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .hero-top { grid-template-columns: 1fr; }
  .compression-visual { display: none; }
  .contact-layout { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .hamburger {
    display: flex;
  }

  .main-content {
    margin-left: 0;
  }

  .hero { padding: 80px 24px 48px; }
  section { padding: 64px 24px; }
  .page-header { padding: 80px 24px 48px; }
  .footer { padding: 48px 24px; flex-direction: column; align-items: flex-start; }
  .page-header::before { display: none; }
}

@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr; }
  .hero h1 { letter-spacing: -2px; }
  .hero-ticker { flex-direction: column; gap: 24px; }
}