/* ============================================================
   KAIRO Marketing — Shared Design System
   www.kairoquantum.ai
   ============================================================ */

/* ---- CSS CUSTOM PROPERTIES ---- */
:root {
  --bg-deep: #06070b;
  --bg-mid: #0b0e18;
  --bg-surface: #10131e;
  --bg-card: rgba(255, 255, 255, 0.02);
  --bg-card-hover: rgba(255, 255, 255, 0.04);
  --border-subtle: rgba(255, 255, 255, 0.06);
  --border-hover: rgba(255, 255, 255, 0.12);

  --text-primary: #e8e4df;
  --text-secondary: #c4bfb8;
  --text-muted: #8a8693;
  --text-dim: #4a4656;

  --accent-kairo: #c9a84c;
  --accent-soma: #4ce0b3;
  --accent-prism: #a78bfa;
  --accent-aria: #f472b6;

  --glow-kairo: rgba(201, 168, 76, 0.15);
  --glow-soma: rgba(76, 224, 179, 0.15);
  --glow-prism: rgba(167, 139, 250, 0.15);
  --glow-aria: rgba(244, 114, 182, 0.15);

  /* Chakra colors */
  --chakra-root: #ef4444;
  --chakra-sacral: #f97316;
  --chakra-solar: #eab308;
  --chakra-heart: #22c55e;
  --chakra-throat: #06b6d4;
  --chakra-third-eye: #6366f1;
  --chakra-crown: #a855f7;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body: 'Outfit', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --nav-height: 72px;
  --max-width: 1200px;
  --section-padding: clamp(4rem, 10vw, 8rem);
}

/* ---- RESET & BASE ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
}

body {
  background: var(--bg-deep);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Noise texture overlay */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ---- TYPOGRAPHY ---- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2.5rem, 7vw, 5.5rem); }
h2 { font-size: clamp(2rem, 5vw, 3.5rem); }
h3 { font-size: clamp(1.3rem, 3vw, 1.8rem); font-weight: 400; }
h4 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 400; }

p { color: var(--text-muted); font-size: 1rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-dim { color: var(--text-dim); }

.label {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.accent-kairo { color: var(--accent-kairo); }
.accent-soma { color: var(--accent-soma); }
.accent-prism { color: var(--accent-prism); }
.accent-aria { color: var(--accent-aria); }

/* ---- LAYOUT ---- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.section {
  padding: var(--section-padding) 0;
  position: relative;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 4rem;
}
.section-header h2 { margin-bottom: 1rem; }
.section-header p { font-size: 1.05rem; line-height: 1.8; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* ---- NAVIGATION ---- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 0 2rem;
  transition: background 0.4s ease, box-shadow 0.4s ease;
}

.nav.scrolled {
  background: rgba(6, 7, 11, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--border-subtle);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
}

.nav-logo span {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 300;
  letter-spacing: 0.15em;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.nav-links a {
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--accent-kairo);
}

.nav-cta {
  padding: 0.5rem 1.25rem;
  border: 1px solid rgba(201, 168, 76, 0.4);
  border-radius: 100px;
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-kairo);
  transition: all 0.3s ease;
}

.nav-cta:hover {
  background: rgba(201, 168, 76, 0.1);
  border-color: var(--accent-kairo);
  box-shadow: 0 0 20px rgba(201, 168, 76, 0.15);
}

/* Mobile hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text-muted);
  transition: all 0.3s ease;
}

.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(4px, 4px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(4px, -4px); }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: all 0.4s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-kairo), #d4a843);
  color: var(--bg-deep);
  box-shadow: 0 4px 24px rgba(201, 168, 76, 0.25);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(201, 168, 76, 0.35);
}

.btn-secondary {
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
}
.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--bg-card);
  transform: translateY(-2px);
}

.btn-ghost {
  color: var(--text-muted);
  padding: 0.5rem 0;
}
.btn-ghost:hover { color: var(--text-primary); }

/* ---- CARDS ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 2.5rem 2rem;
  position: relative;
  overflow: hidden;
  transition: all 0.5s ease;
}

.card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  background: var(--bg-card-hover);
}

.card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  opacity: 0;
  transition: opacity 0.5s ease;
}

.card:hover::before { opacity: 0.8; }

.card-kairo::before { background: linear-gradient(to right, transparent, var(--accent-kairo), transparent); }
.card-soma::before { background: linear-gradient(to right, transparent, var(--accent-soma), transparent); }
.card-prism::before { background: linear-gradient(to right, transparent, var(--accent-prism), transparent); }
.card-aria::before { background: linear-gradient(to right, transparent, var(--accent-aria), transparent); }

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 1.25rem;
}

.card-kairo .card-icon { background: rgba(201, 168, 76, 0.1); color: var(--accent-kairo); }
.card-soma .card-icon { background: rgba(76, 224, 179, 0.1); color: var(--accent-soma); }
.card-prism .card-icon { background: rgba(167, 139, 250, 0.1); color: var(--accent-prism); }
.card-aria .card-icon { background: rgba(244, 114, 182, 0.1); color: var(--accent-aria); }

.card h3 { margin-bottom: 0.5rem; }
.card p { font-size: 0.9rem; line-height: 1.7; }

.card-stats {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.card-stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
}

.card-stat .stat-label { color: var(--text-dim); }

/* ---- AMBIENT ORBS ---- */
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
  pointer-events: none;
  animation: orbFloat 14s ease-in-out infinite;
  will-change: transform;
  backface-visibility: hidden;
  contain: strict;
  -webkit-transform: translateZ(0);
  transform: translateZ(0);
}

.orb-kairo { background: radial-gradient(circle, var(--accent-kairo), transparent 70%); }
.orb-soma { background: radial-gradient(circle, var(--accent-soma), transparent 70%); }
.orb-prism { background: radial-gradient(circle, var(--accent-prism), transparent 70%); }
.orb-aria { background: radial-gradient(circle, var(--accent-aria), transparent 70%); }

@keyframes orbFloat {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  33% { transform: translate3d(30px, -20px, 0) scale(1.05); }
  66% { transform: translate3d(-20px, 15px, 0) scale(0.95); }
}

/* Disable heavy animations for reduced-motion or low-end devices */
@media (prefers-reduced-motion: reduce) {
  .orb { animation: none; opacity: 0.15; filter: blur(60px); }
  .reveal { transition: none; opacity: 1; transform: none; }
}

/* ---- DIVIDERS ---- */
.divider {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--border-subtle), transparent);
  margin: 0 auto;
  max-width: 800px;
}

.divider-glow {
  height: 1px;
  background: linear-gradient(to right, transparent, var(--accent-kairo), var(--accent-prism), transparent);
  opacity: 0.3;
}

/* ---- SCROLL ANIMATIONS ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ---- FOOTER ---- */
.footer {
  padding: 4rem 2rem;
  border-top: 1px solid var(--border-subtle);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr 1fr;
  gap: 3rem;
  align-items: start;
}

.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.footer-brand .footer-logo img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
}

.footer-brand .footer-logo span {
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
}

.footer-brand .patent {
  font-size: 0.65rem;
  color: var(--accent-kairo);
  letter-spacing: 0.25em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 3rem;
}

.footer-col h5 {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-col a {
  font-size: 0.8rem;
  color: var(--text-dim);
  transition: color 0.3s;
}
.footer-col a:hover { color: var(--text-primary); }

.footer-cta {
  text-align: right;
}

.footer-cta .btn { font-size: 0.7rem; }

.footer-bottom {
  max-width: var(--max-width);
  margin: 3rem auto 0;
  padding-top: 2rem;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer-disclaimer {
  font-size: 0.6rem;
  color: var(--text-dim);
  line-height: 1.8;
  max-width: 600px;
  margin: 0 auto;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  :root { --nav-height: 64px; }

  .nav-links {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(6, 7, 11, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
  }

  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.1rem; }
  .nav-toggle { display: flex; }

  .grid-2,
  .grid-3,
  .grid-4 { grid-template-columns: 1fr; }

  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-links { flex-direction: column; gap: 2rem; }
  .footer-cta { text-align: center; }

  .container { padding: 0 1.25rem; }
}

@media (max-width: 480px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.8rem; }
}