/* Intelli-KI — shared styles */

:root {
  /* Colors pulled from logo */
  --ink-900: #0a1424;
  --ink-800: #0f1b30;
  --ink-700: #142541;
  --ink-600: #1b3154;
  --ink-500: #24446f;

  --blue-400: #3b82f6;
  --blue-500: #2563eb;
  --blue-600: #1d4ed8;

  --cyan-300: #7dd3fc;
  --cyan-400: #38bdf8;
  --cyan-500: #0ea5e9;

  --slate-100: #e6eef7;
  --slate-200: #c7d3e2;
  --slate-300: #9fb0c4;
  --slate-400: #8a9bb0;

  --white: #ffffff;

  --accent: var(--cyan-400);
  --accent-soft: rgba(56, 189, 248, 0.14);

  /* Glass */
  --glass-bg: rgba(255, 255, 255, 0.045);
  --glass-bg-strong: rgba(255, 255, 255, 0.075);
  --glass-border: rgba(255, 255, 255, 0.09);
  --glass-border-strong: rgba(255, 255, 255, 0.16);

  /* Type */
  --font-sans: 'Geist', 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'Geist Mono', 'JetBrains Mono', ui-monospace, monospace;

  /* Radii */
  --r-sm: 10px;
  --r-md: 16px;
  --r-lg: 24px;
  --r-xl: 32px;

  /* Easing */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);

  /* Container */
  --container: 1200px;
  --pad-x: clamp(20px, 4vw, 48px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-sans);
  background: var(--ink-900);
  color: var(--slate-100);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'ss01', 'cv11';
  line-height: 1.55;
  overflow-x: hidden;
  min-height: 100vh;
}

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

/* Visible focus indicator for all interactive elements (WCAG 2.4.7) */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--cyan-300);
  outline-offset: 3px;
  border-radius: 4px;
}
.btn:focus-visible {
  outline: 3px solid var(--white);
  outline-offset: 3px;
}

/* Skip link — visually hidden until focused */
.skip-link {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 12px 18px;
  background: var(--white);
  color: var(--ink-900);
  font-weight: 600;
  font-size: 14px;
  border-radius: 999px;
  box-shadow: 0 10px 30px -10px rgba(0,0,0,0.5);
  transform: translateY(-150%);
  transition: transform 200ms var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* Visually hidden but accessible to screen readers */
.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;
}
img { max-width: 100%; display: block; }
button { font: inherit; color: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font: inherit; color: inherit; }

/* ───────── Ambient background ───────── */
.bg-mesh {
  position: fixed;
  inset: 0;
  z-index: -2;
  background:
    radial-gradient(900px 600px at 85% -10%, rgba(56, 189, 248, 0.22), transparent 60%),
    radial-gradient(700px 500px at 10% 30%, rgba(37, 99, 235, 0.18), transparent 60%),
    radial-gradient(800px 600px at 60% 110%, rgba(14, 165, 233, 0.16), transparent 60%),
    linear-gradient(180deg, #0a1424 0%, #0a1528 50%, #091220 100%);
  animation: meshDrift 30s ease-in-out infinite alternate;
}

@keyframes meshDrift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  50%  { transform: translate3d(-1.5%, 1%, 0) scale(1.03); }
  100% { transform: translate3d(1.5%, -1%, 0) scale(1.02); }
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(125, 211, 252, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125, 211, 252, 0.04) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 0%, transparent 75%);
}

.bg-noise {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.035;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* ───────── Container ───────── */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--pad-x);
  padding-right: var(--pad-x);
}

/* ───────── Navigation ───────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  padding-top: 16px;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 12px 18px 12px 20px;
  background: rgba(10, 20, 36, 0.55);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  box-shadow: 0 10px 40px -20px rgba(0, 0, 0, 0.6);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 16px;
}
.nav-brand img {
  width: 34px; height: 34px;
  border-radius: 8px;
  object-fit: cover;
  background: white;
}
.nav-brand span { color: var(--slate-100); }
.nav-brand em {
  color: var(--slate-300);
  font-style: normal;
  font-weight: 400;
  margin-left: 2px;
}

.nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.nav-links a {
  padding: 8px 14px;
  font-size: 14px;
  color: var(--slate-200);
  border-radius: 999px;
  transition: background 200ms var(--ease), color 200ms var(--ease);
}
.nav-links a:hover { color: var(--white); background: var(--glass-bg-strong); }
.nav-links a.active {
  color: var(--white);
  background: var(--glass-bg-strong);
  box-shadow: inset 0 0 0 1px var(--glass-border);
}

.nav-right { display: flex; gap: 10px; align-items: center; }

.lang-toggle {
  display: inline-flex;
  padding: 3px;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
}
.lang-toggle button {
  padding: 5px 10px;
  color: var(--slate-300);
  border-radius: 999px;
  transition: all 180ms var(--ease);
}
.lang-toggle button.active {
  color: var(--ink-900);
  background: var(--cyan-300);
  font-weight: 600;
}

.nav-mobile {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: 999px;
}
.nav-mobile svg { width: 18px; height: 18px; }

.nav-drawer { display: none; }

/* ───────── Buttons ───────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: -0.005em;
  border-radius: 999px;
  transition: all 220ms var(--ease);
  cursor: pointer;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; }

.btn-primary {
  background: linear-gradient(135deg, var(--cyan-400) 0%, var(--blue-500) 100%);
  color: var(--ink-900);
  font-weight: 600;
  box-shadow:
    0 10px 30px -12px rgba(56, 189, 248, 0.55),
    inset 0 1px 0 rgba(255,255,255,0.25);
}
.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow:
    0 18px 40px -15px rgba(56, 189, 248, 0.7),
    inset 0 1px 0 rgba(255,255,255,0.3);
}

.btn-ghost {
  background: var(--glass-bg);
  color: var(--slate-100);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
}

/* ───────── Typography ───────── */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 0.4em;
  color: var(--white);
  text-wrap: balance;
}

h1 {
  font-size: clamp(40px, 6vw, 84px);
  letter-spacing: -0.04em;
  line-height: 0.98;
}
h2 {
  font-size: clamp(30px, 4vw, 52px);
}
h3 {
  font-size: clamp(20px, 2vw, 26px);
  letter-spacing: -0.02em;
}

p { margin: 0 0 1em; color: var(--slate-200); text-wrap: pretty; }

.lead {
  font-size: clamp(17px, 1.4vw, 20px);
  color: var(--slate-200);
  line-height: 1.55;
  max-width: 60ch;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--cyan-300);
  padding: 6px 12px;
  background: var(--accent-soft);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 999px;
}
.eyebrow::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 10px var(--cyan-400);
  animation: pulse 2.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}

.gradient-text {
  background: linear-gradient(135deg, #fff 0%, var(--cyan-300) 50%, var(--blue-400) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ───────── Section ───────── */
section { position: relative; padding: clamp(80px, 10vw, 140px) 0; }
section.tight { padding: clamp(60px, 7vw, 100px) 0; }

.section-head {
  max-width: 720px;
  margin-bottom: clamp(40px, 5vw, 72px);
}
.section-head h2 { margin-bottom: 16px; }
.section-head p { font-size: 18px; color: var(--slate-300); }

/* ───────── Glass panels ───────── */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border-radius: var(--r-lg);
  box-shadow:
    0 1px 0 rgba(255,255,255,0.04) inset,
    0 30px 60px -30px rgba(0, 0, 0, 0.5);
}
.glass-strong {
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
}

/* ───────── Cards ───────── */
.card {
  position: relative;
  padding: 28px;
  border-radius: var(--r-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  overflow: hidden;
  transition: transform 400ms var(--ease), border-color 400ms var(--ease), background 400ms var(--ease);
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(125,211,252,0.2), transparent 40%);
  -webkit-mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  mask: linear-gradient(#000, #000) content-box, linear-gradient(#000, #000);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 400ms var(--ease);
  pointer-events: none;
}
.card:hover {
  transform: translateY(-3px);
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-strong);
}
.card:hover::before { opacity: 1; }

.card-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  display: grid; place-items: center;
  background: linear-gradient(135deg, rgba(56,189,248,0.22), rgba(37,99,235,0.18));
  border: 1px solid rgba(125, 211, 252, 0.25);
  margin-bottom: 20px;
  color: var(--cyan-300);
}
.card-icon svg { width: 22px; height: 22px; }

.card h3 { margin-bottom: 10px; }
.card p { color: var(--slate-300); font-size: 15px; margin-bottom: 0; }

.card-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) {
  .card-list { grid-template-columns: 1fr; }
}

/* ───────── Footer ───────── */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 48px 0 32px;
  margin-top: 80px;
  background: rgba(10, 20, 36, 0.6);
  backdrop-filter: blur(12px);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
@media (max-width: 800px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.footer-brand {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 14px;
  font-weight: 600;
}
.footer-brand img { width: 30px; height: 30px; border-radius: 6px; background: white; }
.footer-col h4 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--slate-400);
  margin-bottom: 14px;
  font-weight: 500;
}
.footer-col a {
  display: block;
  color: var(--slate-200);
  font-size: 14px;
  padding: 5px 0;
  transition: color 180ms var(--ease);
}
.footer-col a:hover { color: var(--cyan-300); }

.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  gap: 16px; flex-wrap: wrap;
  padding-top: 24px;
  border-top: 1px solid var(--glass-border);
  font-size: 13px;
  color: var(--slate-400);
}

/* ───────── Utils ───────── */
.two-col {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: clamp(32px, 5vw, 80px);
  align-items: center;
}
@media (max-width: 900px) { .two-col { grid-template-columns: 1fr; } }

.stack-sm > * + * { margin-top: 14px; }
.stack > * + * { margin-top: 22px; }

.hidden { display: none !important; }

/* Reveal on scroll */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 900ms var(--ease), transform 900ms var(--ease);
  will-change: opacity, transform;
}
.reveal.in {
  opacity: 1;
  transform: none;
}

/* Mobile nav */
@media (max-width: 780px) {
  .nav-links { display: none; }
  .nav-mobile { display: flex; }
  .nav-right .lang-toggle { display: inline-flex; }

  .nav-drawer {
    display: flex;
    position: fixed;
    top: 80px;
    left: 20px;
    right: 20px;
    background: rgba(10, 20, 36, 0.92);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 16px;
    z-index: 60;
    flex-direction: column;
    gap: 4px;
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: all 200ms var(--ease);
  }
  .nav-drawer.open { opacity: 1; transform: none; pointer-events: auto; }
  .nav-drawer a {
    padding: 12px 16px;
    border-radius: 12px;
    color: var(--slate-200);
    font-size: 15px;
  }
  .nav-drawer a.active { background: var(--glass-bg-strong); color: white; }
}

/* Prose for legal pages */
.prose {
  max-width: 780px;
  margin: 0 auto;
}
.prose h2 {
  font-size: 24px;
  margin-top: 48px;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
}
.prose h3 {
  font-size: 17px;
  margin-top: 28px;
  margin-bottom: 8px;
  color: var(--cyan-300);
  font-weight: 500;
  font-family: var(--font-mono);
  letter-spacing: -0.01em;
}
.prose p, .prose li {
  color: var(--slate-200);
  font-size: 15.5px;
  line-height: 1.7;
}
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--white); font-weight: 600; }
.prose a {
  color: var(--cyan-300);
  text-decoration: underline;
  text-decoration-color: rgba(125, 211, 252, 0.4);
  text-underline-offset: 3px;
}
.prose a:hover { text-decoration-color: var(--cyan-300); }
.prose .card {
  margin: 20px 0;
  padding: 20px 24px;
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .bg-mesh { animation: none; }
}