:root {
  --bg: #f7f8fb;
  --bg-soft: #ffffff;
  --bg-card: #ffffff;
  --accent: #3f6df6;
  --accent-2: #4fd1c5;
  --text: #1e2432;
  --text-muted: #5b667a;
  --line: rgba(30, 36, 50, 0.12);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 6px;
  --shadow: 0 32px 80px rgba(30, 36, 50, 0.12);
  --max-width: 1200px;
}

html[data-theme="dark"] {
  --bg: #0f1218;
  --bg-soft: #151a23;
  --bg-card: #161d29;
  --accent: #79a6ff;
  --accent-2: #5ee2d1;
  --text: #f5f7fb;
  --text-muted: #9aa4b5;
  --line: rgba(255, 255, 255, 0.1);
  --shadow: 0 40px 80px rgba(0, 0, 0, 0.5);
}

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

body {
  font-family: "Space Grotesk", system-ui, sans-serif;
  background:
    radial-gradient(circle at 12% 10%, rgba(63, 109, 246, 0.12), transparent 40%),
    radial-gradient(circle at 80% 18%, rgba(79, 209, 197, 0.14), transparent 45%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.page {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 7vw;
  background: rgba(247, 248, 251, 0.75);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}

html[data-theme="dark"] .site-header {
  background: rgba(15, 18, 24, 0.75);
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b0d12;
  font-weight: 700;
}

.brand-text {
  display: flex;
  flex-direction: column;
  font-weight: 600;
}

.brand-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.95rem;
  margin-left: auto;
  justify-content: flex-end;
}

.site-nav a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.site-nav a:hover {
  color: var(--text);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-cta {
  padding: 10px 16px;
  border-radius: 10px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  color: #0f1116;
  font-weight: 600;
}

.theme-toggle,
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--line);
  color: var(--text);
  padding: 8px 14px;
  border-radius: 10px;
}

.nav-toggle {
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
}

.nav-toggle img {
  width: 18px;
  height: 18px;
  display: block;
}

.nav-toggle .icon-open {
  display: none;
}

.nav-toggle.is-open .icon-open {
  display: block;
}

.nav-toggle.is-open .icon-closed {
  display: none;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  font-size: 0.85rem;
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
}

.theme-toggle--mobile {
  display: none;
}

.theme-toggle img {
  width: 18px;
  height: 18px;
  display: block;
}

html[data-theme="dark"] .theme-toggle img {
  filter: invert(1);
}

html[data-theme="dark"] .nav-toggle img {
  filter: invert(1);
}

.theme-toggle .icon-dark {
  display: none;
}

html[data-theme="dark"] .theme-toggle .icon-dark {
  display: block;
}

html[data-theme="dark"] .theme-toggle .icon-light {
  display: none;
}

.content {
  flex: 1;
}

.hero {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 110px 7vw 80px;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.hero-text {
  grid-column: span 7;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-radius: 10px;
  border: 1px solid var(--line);
  color: var(--text-muted);
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.6);
}

html[data-theme="dark"] .hero-tag {
  background: rgba(21, 26, 35, 0.6);
}

.hero h1 {
  font-size: clamp(2.8rem, 4vw, 4rem);
  line-height: 1.1;
  margin: 24px 0 18px;
  font-weight: 600;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
  line-height: 1.7;
  max-width: 520px;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: 10px;
  font-weight: 600;
  line-height: 1.05;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary-btn {
  background: var(--accent);
  color: #0f1116;
  box-shadow: 0 20px 40px rgba(63, 109, 246, 0.18);
}

.secondary-btn {
  border: 1px solid var(--line);
  color: var(--text);
  background: #fff;
}

.secondary-btn--accent {
  background: var(--accent-2);
  border-color: var(--accent-2);
  color: #0f1116;
  box-shadow: 0 18px 32px rgba(79, 209, 197, 0.2);
}

.secondary-btn--light {
  background: #fff;
  color: #1e2432;
  border: 1px solid rgba(30, 36, 50, 0.12);
}

.primary-btn img,
.secondary-btn img {
  width: 16px;
  height: 16px;
  display: block;
}

.primary-btn:hover,
.secondary-btn:hover {
  transform: translateY(-2px);
}

.hero-visual {
  grid-column: span 5;
  position: relative;
  min-height: 420px;
}

.mock-frame {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}

.mock-topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
}

html[data-theme="dark"] .mock-topbar {
  background: rgba(21, 26, 35, 0.6);
}

.mock-topbar span {
  width: 10px;
  height: 10px;
  border-radius: 4px;
  background: rgba(30, 36, 50, 0.2);
}

html[data-theme="dark"] .mock-topbar span {
  background: rgba(255, 255, 255, 0.2);
}

.mock-topbar p {
  margin-left: auto;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.mock-body {
  padding: 24px;
  display: grid;
  gap: 20px;
}

.mock-metrics {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.mock-metric {
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  background: rgba(63, 109, 246, 0.08);
  border: 1px dashed rgba(63, 109, 246, 0.2);
}

html[data-theme="dark"] .mock-metric {
  background: rgba(121, 166, 255, 0.12);
  border-color: rgba(121, 166, 255, 0.3);
}

.mock-metric strong {
  font-size: 1.4rem;
}

.mock-screen {
  border-radius: var(--radius-md);
  background: linear-gradient(120deg, rgba(63, 109, 246, 0.2), rgba(79, 209, 197, 0.2));
  padding: 24px;
  min-height: 160px;
  border: 1px solid var(--line);
}

.mock-gradient {
  height: 80px;
  border-radius: var(--radius-sm);
  background: linear-gradient(120deg, rgba(63, 109, 246, 0.4), rgba(79, 209, 197, 0.3));
}

.mock-line {
  height: 10px;
  background: rgba(30, 36, 50, 0.12);
  margin-top: 12px;
  border-radius: 6px;
}

html[data-theme="dark"] .mock-line {
  background: rgba(255, 255, 255, 0.12);
}

.mock-line.short {
  width: 60%;
}

.float-card {
  position: absolute;
  background: var(--bg-card);
  border-radius: 10px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  box-shadow: 0 18px 40px rgba(30, 36, 50, 0.15);
}

.float-card--left {
  top: -10px;
  left: -30px;
  transform: rotate(-4deg);
}

.float-card--right {
  bottom: 30px;
  right: -24px;
  transform: rotate(3deg);
}

.float-title {
  font-weight: 600;
  margin-bottom: 10px;
}

.float-row {
  height: 10px;
  width: 120px;
  background: rgba(30, 36, 50, 0.12);
  border-radius: 6px;
  margin-bottom: 8px;
}

html[data-theme="dark"] .float-row {
  background: rgba(255, 255, 255, 0.12);
}

.float-row.short {
  width: 80px;
}

.float-tag {
  display: inline-flex;
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px dashed rgba(63, 109, 246, 0.4);
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-right: 6px;
}

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 7vw;
  display: grid;
  gap: 32px;
}

.section h2 {
  font-size: clamp(2rem, 3vw, 2.8rem);
  font-weight: 600;
}

.section p {
  color: var(--text-muted);
  line-height: 1.7;
}

.section ul {
  margin-top: 12px;
  padding-left: 18px;
  color: var(--text-muted);
  line-height: 1.7;
}

.meta {
  color: var(--text-muted);
  font-size: 0.95rem;
  margin-top: 8px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-soft);
  border-radius: var(--radius-md);
  padding: 24px;
  border: 1px solid var(--line);
}

.card h4 {
  margin-bottom: 10px;
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.quote {
  font-family: "Source Serif 4", serif;
  font-size: 1.4rem;
  line-height: 1.6;
  border-left: 2px solid var(--accent);
  padding-left: 18px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px dashed rgba(255, 255, 255, 0.1);
}

.timeline-item span {
  color: var(--text-muted);
}

.site-footer {
  margin-top: 80px;
  padding: 48px 7vw 60px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.site-footer h3 {
  font-size: 1.8rem;
  margin-bottom: 8px;
}

.footer-meta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.reveal {
  opacity: 0;
  transform: translateY(12px);
  animation: fadeUp 0.8s ease forwards;
}

.reveal.delay-1 { animation-delay: 0.15s; }
.reveal.delay-2 { animation-delay: 0.3s; }
.reveal.delay-3 { animation-delay: 0.45s; }

@keyframes fadeUp {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 960px) {
  .site-header {
    flex-wrap: wrap;
    gap: 16px;
  }

  .site-nav {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
    gap: 12px;
  }

  .site-nav.open {
    display: flex;
  }

  .theme-toggle,
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav .theme-toggle {
    display: none;
  }

  .theme-toggle--mobile {
    display: inline-flex;
  }

  .nav-toggle {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: 999px;
    justify-content: center;
    gap: 0;
  }

  .nav-toggle-label {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
  }

  .hero-text,
  .hero-visual {
    grid-column: span 1;
  }

  .timeline-item {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
}