/* ── Accessibility utilities ──────────────────────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Reset & base ─────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0a0a0f;
  --bg-2:      #111118;
  --bg-3:      #16161f;
  --border:    rgba(255,255,255,0.07);
  --text:      #f0f0f5;
  --text-2:    #9090a8;
  --accent:    #7c6fff;
  --accent-hi: #a89dff;
  --mono:      "JetBrains Mono", "Fira Code", monospace;
  --sans:      "Inter", system-ui, sans-serif;
  --radius:    12px;
  --radius-lg: 20px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

code {
  font-family: var(--mono);
  font-size: 0.9em;
}

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: var(--sans);
  cursor: pointer;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
  border: none;
  white-space: nowrap;
}
.btn:hover { opacity: 0.85; }

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { opacity: 1; background: var(--accent-hi); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-outline:hover { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.04); opacity: 1; }

.btn-ghost {
  background: transparent;
  color: var(--text-2);
  padding: 0.5rem 0.75rem;
}
.btn-ghost:hover { color: var(--text); opacity: 1; }

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1rem;
  border-radius: 10px;
}

/* ── Nav ──────────────────────────────────────────────────────────── */
nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2rem;
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(10,10,15,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* ── Hero ─────────────────────────────────────────────────────────── */
.hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 4rem;
  max-width: 1100px;
  margin: 0 auto;
  padding: 7rem 2rem 6rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text);
}

.hero-sub {
  margin-top: 1.25rem;
  font-size: 1.05rem;
  color: var(--text-2);
  max-width: 42ch;
  line-height: 1.7;
}

.hero-actions {
  margin-top: 2rem;
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

/* Avatar cluster */
.hero-avatars {
  display: flex;
  justify-content: center;
  align-items: center;
}

.avatar-cluster {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  align-items: center;
}

.av {
  border-radius: 50%;
  display: block;
  object-fit: cover;
  border: 2px solid var(--border);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.av-wrap:hover .av { transform: scale(1.08); box-shadow: 0 0 0 3px var(--accent); }

.av-lg { width: 88px; height: 88px; }
.av-md { width: 68px; height: 68px; }
.av-sm { width: 52px; height: 52px; }

.av-wrap:has(.av-md),
.av-wrap:has(.av-sm) { justify-self: center; }

.av-wrap {
  position: relative;
  display: inline-flex;
  justify-content: center;
}

.av-tooltip {
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.35rem 0.65rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
  transform: translateX(-50%) translateY(4px);
  z-index: 10;
}

.av-tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 5px solid transparent;
  border-top-color: var(--border);
}

.av-wrap:hover .av-tooltip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Pillars ──────────────────────────────────────────────────────── */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.pillar {
  background: var(--bg);
  padding: 2.5rem 2rem;
  transition: background 0.2s;
}
.pillar:hover { background: var(--bg-2); }

.pillar-icon {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: rgba(124,111,255,0.12);
  color: var(--accent-hi);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.pillar h3 {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.pillar p {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* ── API section ──────────────────────────────────────────────────── */
.api-section {
  padding: 7rem 2rem;
}

.api-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.api-copy h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.03em;
  color: var(--text);
}

.api-copy p {
  margin-top: 1rem;
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.7;
  max-width: 38ch;
}

.api-list {
  list-style: none;
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.api-list li {
  font-size: 0.9rem;
  color: var(--text-2);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.2rem 0.55rem;
  border-radius: 5px;
  background: rgba(124,111,255,0.15);
  color: var(--accent-hi);
  white-space: nowrap;
  flex-shrink: 0;
}

.api-code-block {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.code-row {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.code-comment {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-2);
  opacity: 0.6;
}

.code-row code {
  font-size: 0.82rem;
  color: var(--text);
  word-break: break-all;
  line-height: 1.5;
}

.code-hl { color: var(--accent-hi); }

/* ── Use cases ────────────────────────────────────────────────────── */
.use-cases {
  padding: 7rem 2rem;
  border-top: 1px solid var(--border);
}

.use-cases h2 {
  text-align: center;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 3.5rem;
  color: var(--text);
}

.cases-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.case {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.75rem;
  transition: border-color 0.2s, background 0.2s;
}
.case:hover { border-color: rgba(124,111,255,0.3); background: var(--bg-3); }

.case h4 {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.01em;
}

.case p {
  font-size: 0.875rem;
  color: var(--text-2);
  line-height: 1.6;
}

/* ── CTA ──────────────────────────────────────────────────────────── */
.cta {
  text-align: center;
  padding: 7rem 2rem;
  border-top: 1px solid var(--border);
}

.cta h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
  color: var(--text);
}

.cta p {
  color: var(--text-2);
  font-size: 1rem;
  margin-bottom: 2rem;
}

/* ── Footer ───────────────────────────────────────────────────────── */
footer {
  padding: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-2);
}

.footer-logo {
  font-weight: 600;
  color: var(--text);
  font-size: 0.85rem;
}

.footer-sep { opacity: 0.3; }

/* ── Prose page (privacy, etc.) ──────────────────────────────────── */
.prose-page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 5rem 2rem 7rem;
}

.prose-inner {
  max-width: 68ch;
}

.prose-page h1 {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--text);
  margin-bottom: 0.5rem;
}

.prose-meta {
  font-size: 0.85rem;
  color: var(--text-2);
  margin-bottom: 3.5rem;
}

.prose-page section {
  margin-bottom: 2.5rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid var(--border);
}

.prose-page section:last-child {
  border-bottom: none;
}

.prose-page h2 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.prose-page p {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.75;
  margin-bottom: 0.75rem;
}

.prose-page p:last-child { margin-bottom: 0; }

.prose-page ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

.prose-page ul li {
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.75;
  padding-left: 1.25rem;
  position: relative;
}

.prose-page ul li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: var(--accent-hi);
}

.prose-page a {
  color: var(--accent-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose-page a:hover { color: var(--text); }

.prose-page strong {
  color: var(--text);
  font-weight: 500;
}

/* ── Responsive ───────────────────────────────────────────────────── */
@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 4rem 1.5rem 3rem;
    gap: 3rem;
    text-align: center;
  }
  .hero-sub { max-width: 100%; margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-avatars { order: -1; }
  .avatar-cluster { grid-template-columns: repeat(4, 1fr); gap: 0.75rem; }
  .av-lg { width: 64px; height: 64px; }
  .av-md { width: 52px; height: 52px; }
  .av-sm { width: 40px; height: 40px; }

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

  .api-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .api-copy p { max-width: 100%; }

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

@media (max-width: 540px) {
  nav { padding: 1rem 1.25rem; }
  .cases-grid { grid-template-columns: 1fr; }
  .avatar-cluster { grid-template-columns: repeat(4, 1fr); gap: 0.5rem; }
}