/* ================================================
   AiH LABS — DESIGN SYSTEM
   Autonomist Institute for Humanity AI
   aihlabs.org
   ================================================ */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;0,700;1,300;1,400&family=Outfit:wght@300;400;500;600&family=Syne+Mono&display=swap');

/* ─── CSS VARIABLES ─────────────────────────────── */
:root {
  --bg:           #080b14;
  --surface:      #0f1220;
  --surface-2:    #161b2e;
  --surface-3:    #1c2238;
  --gold:         #c9963b;
  --gold-light:   #e8b86d;
  --gold-dim:     rgba(201,150,59,0.12);
  --cyan:         #38bdf8;
  --cyan-dim:     rgba(56,189,248,0.10);
  --violet:       #818cf8;
  --violet-dim:   rgba(129,140,248,0.10);
  --text:         #dde1ee;
  --text-muted:   #6b7394;
  --text-faint:   #3d4460;
  --border:       #171c30;
  --border-light: #242b45;
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Outfit', system-ui, sans-serif;
  --font-mono:    'Syne Mono', 'Courier New', monospace;
  --max-w:        1200px;
  --radius:       4px;
  --radius-lg:    10px;
  --ease:         200ms ease;
}

/* ─── RESET ─────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.7;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

/* ─── TYPOGRAPHY ─────────────────────────────────── */
h1,h2,h3,h4 { font-family: var(--font-display); font-weight: 400; line-height: 1.15; }
h1 { font-size: clamp(2.8rem, 6vw, 5.5rem); font-weight: 300; }
h2 { font-size: clamp(2rem, 4vw, 3.2rem); }
h3 { font-size: clamp(1.3rem, 2.5vw, 1.8rem); }
h4 { font-size: 1.15rem; font-weight: 500; }
.label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
}
.label.cyan  { color: var(--cyan); }
.label.violet { color: var(--violet); }

/* ─── LAYOUT ────────────────────────────────────── */
.container { max-width: var(--max-w); margin: 0 auto; padding: 0 2rem; }
.section    { padding: 7rem 0; }
.section-sm { padding: 4rem 0; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; align-items: start; }
.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; }

/* ─── SCROLL REVEAL ──────────────────────────────── */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.65s ease, transform 0.65s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* ─── NAVIGATION ─────────────────────────────────── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.2rem 0;
  transition: background var(--ease), backdrop-filter var(--ease), border-color var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(8,11,20,0.88);
  backdrop-filter: blur(24px);
  border-color: var(--border);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}
.nav-logo { display: flex; flex-direction: column; gap: 0.1rem; }
.nav-logo-text {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.04em;
}
.nav-logo-text span { color: var(--gold); }
.nav-logo-sub {
  font-family: var(--font-mono);
  font-size: 0.57rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
}
.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}
.nav-links a {
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  transition: color var(--ease);
  position: relative;
}
.nav-links a:hover,
.nav-links a.active { color: var(--text); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--gold);
  transition: width var(--ease);
}
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-cta {
  background: transparent !important;
  border: 1px solid var(--gold) !important;
  color: var(--gold) !important;
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius);
  transition: background var(--ease), color var(--ease) !important;
}
.nav-cta::after { display: none !important; }
.nav-cta:hover { background: var(--gold) !important; color: var(--bg) !important; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text);
  transition: transform var(--ease), opacity var(--ease);
}
.nav-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 150;
}
.nav-overlay.open { display: block; }

/* ─── HERO ──────────────────────────────────────── */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 5rem;
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.hero-grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(56,189,248,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56,189,248,0.035) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 40%, black 20%, transparent 100%);
}
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(90px); opacity: 0.2;
  animation: drift 14s ease-in-out infinite;
}
.hero-orb-1 { width: 600px; height: 600px; top: -150px; right: -100px; background: radial-gradient(circle, #38bdf8 0%, transparent 70%); animation-delay: 0s; }
.hero-orb-2 { width: 450px; height: 450px; bottom: -50px; left: -80px; background: radial-gradient(circle, #c9963b 0%, transparent 70%); animation-delay: -7s; }
.hero-orb-3 { width: 300px; height: 300px; top: 30%; left: 50%; background: radial-gradient(circle, #818cf8 0%, transparent 70%); animation-delay: -3s; opacity: 0.1; }
@keyframes drift {
  0%,100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(30px,-25px) scale(1.05); }
  66%      { transform: translate(-20px,30px) scale(0.95); }
}
.hero-content {
  position: relative; z-index: 1; max-width: 900px;
}
.hero-eyebrow {
  display: flex; align-items: center; gap: 1rem;
  margin-bottom: 2rem;
  animation: fadeUp 0.8s ease both;
}
.hero-eyebrow::before {
  content: ''; display: block; width: 40px; height: 1px; background: var(--gold);
}
.hero h1 { margin-bottom: 1.5rem; animation: fadeUp 0.8s ease 0.1s both; }
.hero h1 em { font-style: italic; color: var(--gold-light); }
.hero-desc {
  font-size: 1.1rem; color: var(--text-muted); max-width: 600px;
  margin-bottom: 3rem; line-height: 1.85;
  animation: fadeUp 0.8s ease 0.2s both;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; animation: fadeUp 0.8s ease 0.3s both; }
.hero-stats {
  display: flex; gap: 3.5rem; margin-top: 5rem;
  padding-top: 2.5rem; border-top: 1px solid var(--border);
  animation: fadeUp 0.8s ease 0.4s both; flex-wrap: wrap;
}
.hero-stat-num { font-family: var(--font-display); font-size: 2.4rem; font-weight: 300; color: var(--gold-light); display: block; line-height: 1; }
.hero-stat-label { font-family: var(--font-mono); font-size: 0.65rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: none; }
}

/* ─── BUTTONS ────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.8rem 1.8rem; border-radius: var(--radius);
  font-size: 0.9rem; font-weight: 500; letter-spacing: 0.03em;
  transition: all var(--ease);
}
.btn-primary  { background: var(--gold); color: var(--bg); }
.btn-primary:hover { background: var(--gold-light); transform: translateY(-1px); }
.btn-outline  { border: 1px solid var(--border-light); color: var(--text); }
.btn-outline:hover { border-color: var(--text-muted); background: var(--surface); }
.btn-ghost    { color: var(--gold); padding-left: 0; gap: 0.5rem; }
.btn-ghost:hover  { gap: 0.9rem; }
.btn-ghost .arrow { transition: transform var(--ease); }
.btn-ghost:hover .arrow { transform: translateX(4px); }
.btn-cyan { background: transparent; border: 1px solid var(--cyan); color: var(--cyan); }
.btn-cyan:hover { background: var(--cyan); color: var(--bg); }

/* ─── CARDS ─────────────────────────────────────── */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: border-color var(--ease), transform var(--ease);
  position: relative; overflow: hidden;
}
.card:hover { border-color: var(--border-light); transform: translateY(-2px); }
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
  opacity: 0; transition: opacity var(--ease);
}
.card:hover::before { opacity: 1; }
.card-tag {
  display: inline-block; padding: 0.2rem 0.7rem;
  background: var(--gold-dim); color: var(--gold-light);
  border-radius: 2px; font-family: var(--font-mono);
  font-size: 0.63rem; letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 1rem;
}
.card-tag.cyan   { background: var(--cyan-dim);   color: var(--cyan); }
.card-tag.violet { background: var(--violet-dim); color: var(--violet); }

/* ─── SECTION HEADERS ────────────────────────────── */
.section-header { margin-bottom: 4rem; }
.section-header h2 { margin-top: 0.5rem; margin-bottom: 1rem; }
.section-header p { color: var(--text-muted); max-width: 560px; font-size: 1.05rem; }

/* ─── PROJECT CARDS ──────────────────────────────── */
.project-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 2rem;
  transition: all 260ms ease;
  position: relative; overflow: hidden;
}
.project-card:hover {
  border-color: var(--gold); transform: translateY(-4px);
  box-shadow: 0 24px 60px rgba(0,0,0,0.35), 0 0 40px rgba(201,150,59,0.06);
}
.project-card::after {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 20%, rgba(201,150,59,0.04) 0%, transparent 60%);
  opacity: 0; transition: opacity 260ms ease;
}
.project-card:hover::after { opacity: 1; }
.project-icon {
  width: 50px; height: 50px; border-radius: 10px;
  background: var(--gold-dim); border: 1px solid rgba(201,150,59,0.25);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; margin-bottom: 1.3rem;
}
.project-icon.cyan   { background: var(--cyan-dim);   border-color: rgba(56,189,248,0.25); }
.project-icon.violet { background: var(--violet-dim); border-color: rgba(129,140,248,0.25); }
.project-card h3 { font-size: 1.3rem; margin-bottom: 0.6rem; }
.project-card p  { color: var(--text-muted); font-size: 0.92rem; line-height: 1.75; }
.project-status {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--font-mono); font-size: 0.62rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text-muted); margin-top: 1.2rem;
}
.project-status::before {
  content: ''; display: block; width: 6px; height: 6px;
  border-radius: 50%; background: var(--gold);
}
.project-status.active::before { background: #4ade80; box-shadow: 0 0 8px rgba(74,222,128,0.5); }

/* ─── DIVIDER ────────────────────────────────────── */
.divider { height: 1px; background: linear-gradient(90deg, transparent, var(--border), transparent); margin: 0; }

/* ─── FORMS ─────────────────────────────────────── */
.form-group { margin-bottom: 1.5rem; }
.form-group label {
  display: block; font-family: var(--font-mono);
  font-size: 0.67rem; letter-spacing: 0.13em;
  text-transform: uppercase; color: var(--text-muted);
  margin-bottom: 0.5rem;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%; background: var(--surface);
  border: 1px solid var(--border-light); border-radius: var(--radius);
  padding: 0.85rem 1rem; color: var(--text);
  font-family: var(--font-body); font-size: 0.95rem;
  transition: border-color var(--ease); outline: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--gold); }
.form-group textarea { min-height: 130px; resize: vertical; }
.form-group select { appearance: none; cursor: pointer; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-checkbox { display: flex; align-items: flex-start; gap: 0.75rem; cursor: pointer; }
.form-checkbox input[type="checkbox"] { margin-top: 3px; accent-color: var(--gold); width: 16px; height: 16px; flex-shrink: 0; }
.form-checkbox span { font-size: 0.9rem; color: var(--text-muted); line-height: 1.5; }
.form-success {
  background: rgba(74,222,128,0.08); border: 1px solid rgba(74,222,128,0.3);
  border-radius: var(--radius); padding: 1rem 1.5rem;
  color: #4ade80; font-size: 0.9rem; display: none;
}

/* ─── PAGE HERO (inner pages) ────────────────────── */
.page-hero {
  padding: 10rem 0 5rem; position: relative; overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 55% 55% at 20% 50%, rgba(56,189,248,0.05) 0%, transparent 100%);
}
.page-hero .container { position: relative; z-index: 1; }
.page-hero h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); margin-top: 0.5rem; margin-bottom: 1rem; }
.page-hero p  { color: var(--text-muted); font-size: 1.05rem; max-width: 580px; }

/* ─── BLOG ──────────────────────────────────────── */
.blog-post { padding: 2.5rem 0; border-bottom: 1px solid var(--border); display: grid; grid-template-columns: 70px 1fr; gap: 2.5rem; align-items: start; }
.blog-date { text-align: center; }
.blog-date-day   { font-family: var(--font-display); font-size: 2.2rem; font-weight: 300; color: var(--gold-light); display: block; line-height: 1; }
.blog-date-month { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted); }
.blog-post h3 { font-size: 1.5rem; margin-bottom: 0.4rem; }
.blog-post h3 a:hover { color: var(--gold-light); }
.blog-post .label { margin-bottom: 0.4rem; display: block; }
.blog-post > div > p { color: var(--text-muted); margin-top: 0.4rem; font-size: 0.92rem; }

/* ─── NOTICE BANNERS ─────────────────────────────── */
.notice {
  background: var(--gold-dim); border: 1px solid rgba(201,150,59,0.28);
  border-radius: var(--radius); padding: 0.9rem 1.4rem;
  font-size: 0.88rem; color: var(--gold-light);
}

/* ─── FOOTER ─────────────────────────────────────── */
.footer { background: var(--surface); border-top: 1px solid var(--border); padding: 5rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; margin-bottom: 3.5rem; }
.footer-brand .nav-logo-text { font-size: 1.4rem; }
.footer-brand p { color: var(--text-muted); font-size: 0.88rem; margin-top: 1rem; line-height: 1.7; max-width: 280px; }
.footer-col h4 { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.15em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 1.2rem; font-weight: 400; }
.footer-col a { display: block; color: var(--text-muted); font-size: 0.87rem; margin-bottom: 0.65rem; transition: color var(--ease); }
.footer-col a:hover { color: var(--text); }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 1.5rem; display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 0.75rem; }
.footer-bottom p { font-size: 0.78rem; color: var(--text-faint); }
.footer-bottom a { color: var(--text-muted); transition: color var(--ease); }
.footer-bottom a:hover { color: var(--gold); }

/* ─── UTILITY ────────────────────────────────────── */
.text-gold   { color: var(--gold-light); }
.text-cyan   { color: var(--cyan); }
.text-violet { color: var(--violet); }
.text-muted  { color: var(--text-muted); }
.mt-sm { margin-top: 0.5rem; }
.mt-1  { margin-top: 1rem; }
.mt-2  { margin-top: 1.5rem; }
.mt-3  { margin-top: 2rem; }
.mt-4  { margin-top: 3rem; }
.mb-1  { margin-bottom: 1rem; }
.mb-2  { margin-bottom: 1.5rem; }
.mb-3  { margin-bottom: 2rem; }

/* ─── RESPONSIVE ─────────────────────────────────── */
@media (max-width: 960px) {
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 680px) {
  .nav-links {
    display: none; flex-direction: column;
    position: fixed; top: 0; right: 0; bottom: 0; width: 270px;
    background: var(--surface); padding: 5rem 2rem 2rem;
    border-left: 1px solid var(--border); gap: 0; z-index: 200;
    box-shadow: -20px 0 60px rgba(0,0,0,0.5);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.9rem 0; border-bottom: 1px solid var(--border); font-size: 1rem; color: var(--text); }
  .nav-cta { margin-top: 1rem; text-align: center; }
  .nav-toggle { display: flex; z-index: 300; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-wrap: wrap; gap: 1.5rem; }
  .form-row { grid-template-columns: 1fr; }
  .blog-post { grid-template-columns: 1fr; gap: 0.75rem; }
  .blog-date { display: flex; gap: 0.5rem; align-items: baseline; }
}