/* =========================================================
   Aether AI Agency — design system
   ========================================================= */

:root {
  --ink: #0b0f1a;
  --ink-soft: #3a4157;
  --bg: #f7f8fc;
  --surface: #ffffff;
  --surface-alt: #f0f2f8;
  --line: #e3e7f0;
  --primary: #4f46e5;
  --primary-600: #4338ca;
  --primary-300: #a5b4fc;
  --accent: #0fb5a6;
  --accent-soft: #d6f5f0;
  --danger: #e11d48;
  --muted: #6b7280;

  --r-sm: 8px;
  --r-md: 14px;
  --r-lg: 22px;
  --r-xl: 32px;

  --sh-sm: 0 1px 2px rgba(11, 15, 26, 0.05);
  --sh-md: 0 8px 24px -12px rgba(11, 15, 26, 0.18);
  --sh-lg: 0 24px 60px -24px rgba(79, 70, 229, 0.28);
  --sh-glow: 0 0 0 1px rgba(79, 70, 229, 0.08), 0 20px 50px -20px rgba(79, 70, 229, 0.35);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 260ms;
}

.bg-aether-bg { background-color: var(--bg); }
.text-aether-ink { color: var(--ink); }
.text-aether-muted { color: var(--muted); }
.border-aether-line { border-color: var(--line); }

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

body {
  font-family: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
::selection { background: var(--primary-300); color: var(--ink); }

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

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

/* Skip link */
.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--ink);
  color: #fff;
  border-radius: var(--r-sm);
  font-weight: 600;
  font-size: 14px;
  transform: translateY(-200%);
  transition: transform var(--dur) var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* Typography */
h1, h2, h3, h4 { letter-spacing: -0.02em; line-height: 1.1; margin: 0; }

.eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}

.text-gradient {
  background: linear-gradient(96deg, var(--primary) 0%, #7c5cff 40%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

/* Nav */
.nav-shell {
  background: rgba(247, 248, 252, 0.75);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), background 300ms var(--ease), box-shadow 300ms var(--ease);
}
.nav-shell.is-scrolled {
  background: rgba(247, 248, 252, 0.92);
  border-bottom-color: var(--line);
  box-shadow: var(--sh-sm);
}
.nav-inner { padding-top: 18px; padding-bottom: 18px; transition: padding 300ms var(--ease); }
.nav-shell.is-scrolled .nav-inner { padding-top: 10px; padding-bottom: 10px; }

.brand { transition: transform var(--dur) var(--ease); }
.brand:hover { transform: translateY(-1px); }
.brand-mark {
  width: 32px;
  height: 32px;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(160deg, rgba(79, 70, 229, 0.14), rgba(15, 181, 166, 0.08));
  border-radius: 9px;
  padding: 4px;
}
.brand-mark svg { width: 100%; height: 100%; }
.brand-text { font-weight: 800; font-size: 20px; letter-spacing: -0.03em; color: var(--ink); }
.brand-dot { color: var(--accent); }

.nav-links { list-style: none; margin: 0; padding: 0; }
.nav-link {
  display: inline-block;
  padding: 9px 14px;
  border-radius: 999px;
  font-size: 14.5px;
  font-weight: 500;
  color: var(--ink-soft);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav-link:hover { color: var(--ink); background: rgba(79, 70, 229, 0.06); }
.nav-link.is-active { color: var(--primary); background: rgba(79, 70, 229, 0.08); }

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  gap: 5px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--surface);
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav-toggle:hover { background: var(--surface-alt); }
.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 260ms var(--ease), opacity 200ms var(--ease);
}
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  overflow: hidden;
  border-top: 1px solid var(--line);
  margin-top: 12px;
  animation: slideDown 240ms var(--ease);
}
@keyframes slideDown { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }
.mobile-link {
  display: block;
  padding: 12px 14px;
  border-radius: 10px;
  font-weight: 500;
  color: var(--ink-soft);
}
.mobile-link:hover, .mobile-link.is-active { background: rgba(79, 70, 229, 0.08); color: var(--primary); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14.5px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-sm { padding: 9px 16px; font-size: 13.5px; }
.btn-lg { padding: 14px 24px; font-size: 15.5px; }

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, #6d5cff 60%, #7c5cff 100%);
  color: #fff;
  box-shadow: var(--sh-lg);
}
.btn-primary:hover { box-shadow: 0 28px 70px -24px rgba(79, 70, 229, 0.5); }

.btn-ghost {
  background: rgba(255,255,255,0.7);
  color: var(--ink);
  border-color: var(--line);
}
.btn-ghost:hover { background: #fff; border-color: foreach; border-color: var(--primary-300); }

.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }

/* Hero */
.hero { position: relative; padding: 56px 0 88px; }
.hero-glow {
  position: absolute;
  inset: -200px -100px auto -100px;
  height: 620px;
  background: radial-gradient(600px 320px at 20% 30%, rgba(79, 70, 229, 0.18), transparent 65%),
              radial-gradient(520px 300px at 80% 20%, rgba(15, 181, 166, 0.14), transparent 65%);
  filter: blur(6px);
  pointer-events: none;
}
.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(11,15,26,0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(11,15,26,0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 0%, #000 40%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, #000 40%, transparent 78%);
  pointer-events: none;
}
.hero-inner { position: relative; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  background: rgba(255,255,255,0.85);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink-soft);
  box-shadow: var(--sh-sm);
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(15, 181, 166, 0.6);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(15, 181, 166, 0.6); }
  70% { box-shadow: 0 0 0 10px rgba(15, 181, 166, 0); }
  100% { box-shadow: 0 0 0 0 rgba(15, 181, 166, 0); }
}

/* Cards */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--sh-md); border-color: var(--primary-300); }

.glass-card {
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--r-lg);
  box-shadow: 0 20px 50px -24px rgba(11, 15, 26, 0.18);
}

.bento {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(12, 1fr);
}
.bento > * { grid-column: span 12; }
@media (min-width: 768px) {
  .bento .bento-md-6 { grid-column: span 6; }
  .bento .bento-md-4 { grid-column: span 4; }
  .bento .bento-md-8 { grid-column: span 8; }
}

/* Section rhythm */
.section { padding: 80px 0; }
.section-tight { padding: 56px 0; }
@media (min-width: 1024px) { .section { padding: 104px 0; } }
.section-alt { background: linear-gradient(180deg, #fbfcff 0%, #f2f4fb 100%); }
.section-dark { background: linear-gradient(160deg, #0b0f1a 0%, #131a2e 100%); color: #e8ebf5; }
.section-dark .eyebrow { color: var(--primary-300); }
.section-dark h2, .section-dark h3 { color: #fff; }

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms var(--ease), transform 700ms var(--ease);
  transition-delay: var(--delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* Stats */
.stat-value { font-size: clamp(28px, 4vw, 44px); font-weight: 800; letter-spacing: -0.03em; }

/* Tabs */
.tab-btn {
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 14px;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
}
.tab-btn:hover { background: rgba(79, 70, 229, 0.06); }
.tab-btn.is-active { background: var(--ink); color: #fff; }

/* FAQ */
.faq-item { border-bottom: 1px solid var(--line); }
.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  background: none;
  border: 0;
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  color: var(--ink);
}
.faq-trigger .faq-icon { transition: transform var(--dur) var(--ease); flex-shrink: 0; }
.faq-trigger[aria-expanded="true"] .faq-icon { transform: rotate(45deg); }
.faq-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 340ms var(--ease);
}
.faq-body p { padding-bottom: 22px; color: var(--ink-soft); line-height: 1.65; margin: 0; }

/* Inputs */
.field { display: block; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--ink-soft); margin-bottom: 6px; }
.field input, .field textarea, .field select {
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font-size: 15px;
  font-family: inherit;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
}

/* Avatar */
.avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: inline-flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 15px;
  flex-shrink: 0;
}

/* Footer */
.site-footer { background: linear-gradient(180deg, #fff 0%, #f0f2f8 100%); border-top: 1px solid var(--line); }
.footer-link { color: var(--ink-soft); transition: color var(--dur) var(--ease); }
.footer-link:hover { color: var(--primary); }

/* Utilities */
.container-x { margin-inline: auto; max-width: 1280px; padding-inline: 24px; }
@media (min-width: 1024px) { .container-x { padding-inline: 32px; } }

.mask-fade { mask-image: linear-gradient(180deg, #000 60%, transparent); }