@import "tokens.css";

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-primary);
  background: var(--bg-page);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }

.container {
  width: min(100% - var(--gutter) * 2, var(--container));
  margin-inline: auto;
}

/* Typography */
.serif { font-family: var(--font-display); font-weight: 500; }
.label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.label--accent { color: var(--accent); }
.label--on-dark { color: rgba(232, 237, 242, 0.5); }

h1, h2 { font-family: var(--font-display); font-weight: 500; line-height: 1.05; margin: 0; letter-spacing: -0.02em; }
.section-title {
  font-size: clamp(2rem, 4vw, 2.5rem);
  margin-bottom: var(--space-4);
}
.section-lead {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 40rem;
  margin: 0 0 var(--space-6);
}
.text-center { text-align: center; }
.section-lead--center { margin-inline: auto; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  transition: transform var(--duration) var(--ease), background var(--duration), box-shadow var(--duration);
}
.btn:hover { transform: translateY(-1px); }
.btn--primary {
  background: var(--accent);
  color: var(--bg-deep);
}
.btn--primary:hover { box-shadow: 0 0 24px rgba(255, 77, 0, 0.35); }
.btn--secondary {
  background: transparent;
  color: var(--text-on-dark);
  border: 1px solid rgba(232, 237, 242, 0.2);
}
.btn--secondary:hover { background: rgba(255, 255, 255, 0.06); }
.btn--secondary-light {
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn--secondary-light:hover { background: var(--bg-page); }
.btn--block { width: 100%; }

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(11, 15, 20, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--duration);
}
.site-header.is-scrolled { border-bottom-color: var(--border-dark); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 4rem;
  gap: var(--space-4);
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--text-on-dark);
  letter-spacing: -0.02em;
}
.logo__mark {
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.4rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-indigo));
  display: grid;
  place-items: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--bg-deep);
}
.nav { display: flex; align-items: center; gap: var(--space-6); }
.nav a {
  font-size: 0.875rem;
  font-weight: 500;
  color: rgba(232, 237, 242, 0.65);
  transition: color var(--duration);
}
.nav a:hover { color: var(--text-on-dark); }
.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-dark);
  color: var(--text-on-dark);
}

/* Hero */
.hero {
  position: relative;
  padding: calc(4rem + var(--space-9)) 0 var(--space-9);
  background: var(--bg-deep);
  color: var(--text-on-dark);
  overflow: hidden;
}
.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 77, 0, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 77, 0, 0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, #000 20%, transparent 75%);
  pointer-events: none;
}
.hero__glow {
  position: absolute;
  top: -20%;
  left: 50%;
  width: 60rem;
  height: 30rem;
  transform: translateX(-50%);
  background: radial-gradient(ellipse, rgba(255, 77, 0, 0.08) 0%, rgba(139, 92, 246, 0.05) 40%, transparent 70%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
.hero__content { max-width: 34rem; }
.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.25rem, 5vw, 3.5rem);
  font-weight: 500;
  margin-bottom: var(--space-4);
  letter-spacing: -0.03em;
}
.hero__tagline {
  font-size: 1.25rem;
  color: var(--accent);
  margin-bottom: var(--space-3);
  font-weight: 500;
}
.hero__rotator {
  font-size: 0.9375rem;
  color: rgba(232, 237, 242, 0.55);
  margin-bottom: var(--space-5);
  min-height: 1.5rem;
}
.hero__rotator span { color: var(--accent); }
.hero__lead {
  color: rgba(232, 237, 242, 0.7);
  margin-bottom: var(--space-6);
  font-size: 1.0625rem;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-3); }

/* Code panel */
.code-panel {
  background: var(--code-bg);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.code-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-dark);
  font-size: 0.75rem;
  color: var(--text-muted);
}
.code-panel__dots { display: flex; gap: 0.35rem; }
.code-panel__dots span {
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 50%;
  background: var(--border-dark);
}
.code-panel__dots span:nth-child(1) { background: #ff5f57; }
.code-panel__dots span:nth-child(2) { background: #febc2e; }
.code-panel__dots span:nth-child(3) { background: #28c840; }
.code-panel__copy {
  padding: 0.25rem 0.6rem;
  border-radius: 0.25rem;
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--text-muted);
  border: 1px solid var(--border-dark);
  transition: color var(--duration), border-color var(--duration);
}
.code-panel__copy:hover { color: var(--accent); border-color: var(--accent); }
.code-panel pre {
  margin: 0;
  padding: var(--space-5);
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: #abb2bf;
}
.code-panel .kw { color: #c792ea; }
.code-panel .fn { color: #82aaff; }
.code-panel .str { color: #34d399; }
.code-panel .cm { color: #6b7a8c; }
.code-panel .num { color: #f78c6c; }

/* Metrics */
.metrics-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-dark);
}
.metric strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.75rem;
  color: var(--text-on-dark);
  margin-bottom: var(--space-1);
}
.metric span {
  font-size: 0.8125rem;
  color: rgba(232, 237, 242, 0.5);
}

/* Sections */
.section { padding-block: var(--space-9); }
.section--dark {
  background: var(--bg-deep);
  color: var(--text-on-dark);
}
.section--dark .section-lead { color: rgba(232, 237, 242, 0.6); }

/* Steps */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.step-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--duration), box-shadow var(--duration);
}
.step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.step-card__num {
  font-size: 3rem;
  font-weight: 300;
  color: var(--accent);
  opacity: 0.25;
  line-height: 1;
  margin-bottom: var(--space-3);
}
.step-card h3 {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.step-card p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}

/* Architecture */
.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.arch-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--duration), transform var(--duration);
}
.arch-card:hover {
  border-color: rgba(255, 77, 0, 0.3);
  transform: translateY(-2px);
}
.arch-card__icon {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  color: var(--accent);
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  margin-bottom: var(--space-4);
}
.arch-card h3 {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-on-dark);
  margin-bottom: var(--space-2);
}
.arch-card p {
  margin: 0;
  font-size: 0.875rem;
  color: rgba(232, 237, 242, 0.6);
  line-height: 1.6;
}

/* Code tabs */
.code-tabs { margin-top: var(--space-6); }
.code-tabs__nav {
  display: inline-flex;
  gap: var(--space-1);
  padding: var(--space-1);
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-4);
}
.code-tabs__nav button {
  padding: 0.5rem 1rem;
  border-radius: 0.35rem;
  font-size: 0.8125rem;
  font-weight: 600;
  color: rgba(232, 237, 242, 0.5);
  transition: background var(--duration), color var(--duration);
}
.code-tabs__nav button.is-active {
  background: var(--accent-dim);
  color: var(--accent);
}
.code-tabs__panel { display: none; }
.code-tabs__panel.is-active { display: block; }

/* Use cases */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
}
.usecase-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: transform var(--duration), box-shadow var(--duration), border-color var(--duration);
}
.usecase-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 77, 0, 0.3);
}
.usecase-card h3 {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.usecase-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Trust */
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}
.trust-item {
  text-align: center;
  padding: var(--space-5);
  background: var(--bg-surface);
  border: 1px solid var(--border-dark);
  border-radius: var(--radius-md);
}
.trust-item strong {
  display: block;
  font-size: 0.875rem;
  color: var(--text-on-dark);
  margin-bottom: var(--space-1);
}
.trust-item span {
  font-size: 0.75rem;
  color: rgba(232, 237, 242, 0.5);
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  align-items: stretch;
}
.price-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
}
.price-card--featured {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), var(--shadow-md);
}
.price-card h3 {
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-1);
}
.price-card__desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
}
.price-card__amount {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 500;
  margin-bottom: var(--space-5);
}
.price-card__amount small {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
}
.price-card ul {
  flex: 1;
  margin-bottom: var(--space-5);
}
.price-card li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--border);
  padding-left: 1.25rem;
  position: relative;
}
.price-card li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 600;
}
.price-card li:last-child { border-bottom: none; }

/* FAQ */
.faq-list { max-width: 44rem; margin-inline: auto; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item button {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
}
.faq-item__icon {
  flex-shrink: 0;
  width: 1.25rem;
  height: 1.25rem;
  transition: transform var(--duration);
}
.faq-item.is-open .faq-item__icon { transform: rotate(45deg); }
.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--duration) var(--ease);
}
.faq-item.is-open .faq-item__answer { max-height: 12rem; }
.faq-item__answer p {
  margin: 0 0 var(--space-5);
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* CTA */
.cta {
  text-align: center;
  background: linear-gradient(180deg, var(--bg-deep) 0%, #140a06 100%);
  color: var(--text-on-dark);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 100%, rgba(255, 77, 0, 0.12) 0%, transparent 70%);
  pointer-events: none;
}
.cta .container { position: relative; }
.cta h2 {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: var(--space-4);
}
.cta p {
  color: rgba(232, 237, 242, 0.65);
  max-width: 32rem;
  margin: 0 auto var(--space-6);
}
.cta__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background: var(--bg-deep);
  color: var(--text-on-dark);
  padding: var(--space-8) 0 var(--space-6);
  border-top: 1px solid var(--border-dark);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-7);
}
.footer-brand p {
  font-size: 0.875rem;
  color: rgba(232, 237, 242, 0.55);
  margin: var(--space-4) 0 0;
  max-width: 20rem;
}
.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(232, 237, 242, 0.4);
  margin: 0 0 var(--space-4);
}
.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: rgba(232, 237, 242, 0.75);
  margin-bottom: var(--space-2);
  transition: color var(--duration);
}
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-dark);
  font-size: 0.8125rem;
  color: rgba(232, 237, 242, 0.4);
}

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.reveal-group > .reveal:nth-child(1) { --reveal-delay: 0ms; }
.reveal-group > .reveal:nth-child(2) { --reveal-delay: 80ms; }
.reveal-group > .reveal:nth-child(3) { --reveal-delay: 160ms; }
.reveal-group > .reveal:nth-child(4) { --reveal-delay: 240ms; }
.reveal-group > .reveal:nth-child(5) { --reveal-delay: 320ms; }
.reveal-group > .reveal:nth-child(6) { --reveal-delay: 400ms; }

/* Responsive */
@media (max-width: 960px) {
  .hero__inner { grid-template-columns: 1fr; }
  .steps, .arch-grid, .usecase-grid, .pricing-grid, .trust-grid {
    grid-template-columns: 1fr;
  }
  .metrics-strip { grid-template-columns: 1fr; text-align: center; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .section { padding-block: var(--space-8); }
  .nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-deep);
    border-bottom: 1px solid var(--border-dark);
    padding: var(--space-4);
  }
  .nav.is-open { display: flex; }
  .nav a { padding: var(--space-3) 0; }
  .nav-toggle { display: inline-flex; }
  .header-cta { display: none; }
  .footer-grid { grid-template-columns: 1fr; }
}