/* Root theme tokens */
:root {
  --bg: #0b1220;
  --bg-elev: rgba(255, 255, 255, 0.06);
  --text: #e6edf3;
  --muted: #9fb2c8;
  --brand: #0ea5e9; /* sky-500 */
  --brand-2: #22d3ee; /* cyan-400 */
  --card-border: rgba(255, 255, 255, 0.12);
  --glass: rgba(255, 255, 255, 0.06);
  --shadow: 0 10px 30px rgba(0,0,0,.35);
}

[data-theme="light"] {
  --bg: #f6f7fb;
  --bg-elev: rgba(0, 0, 0, 0.06);
  --text: #101828;
  --muted: #475467;
  --card-border: rgba(0, 0, 0, 0.08);
  --glass: rgba(255, 255, 255, 0.65);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
/* Smooth scroll for in-page anchors */
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  background: radial-gradient(1000px 700px at -15% -20%, rgba(56,189,248,.22), transparent 50%),
              radial-gradient(1000px 700px at 115% -20%, rgba(34,211,238,.16), transparent 50%),
              radial-gradient(1000px 650px at 50% 120%, rgba(14,165,233,.18), transparent 56%),
              var(--bg);
  line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }
.section { padding: 84px 0 52px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px; margin: 14px auto; border-radius: 14px;
  width: min(1100px, calc(100% - 28px));
  backdrop-filter: saturate(140%) blur(8px);
  background: var(--glass);
  border: 1px solid var(--card-border);
}
.logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); }
.logo-hex {
  display: grid; place-items: center; width: 36px; height: 36px; font-weight: 800; letter-spacing: .5px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2)); color: white; border-radius: 10px;
  box-shadow: 0 10px 20px rgba(14,165,233,.35);
}
.site-nav { display: flex; align-items: center; gap: 14px; }
.site-nav a { color: var(--text); text-decoration: none; opacity: .9; }
.site-nav a:hover { opacity: 1; }
.icon-btn { border: 0; background: transparent; color: var(--text); cursor: pointer; }
.icon { width: 22px; height: 22px; display: block; }
.icon.moon { display: none; }
[data-theme="light"] .icon.sun { display: none; }
[data-theme="light"] .icon.moon { display: block; }

/* Hero */
.hero { text-align: center; padding-top: 120px; padding-bottom: 0; }
.hero .kicker { color: var(--muted); letter-spacing: .25em; text-transform: uppercase; font-size: 13px; margin: 0 0 8px; }
.hero h1 { font-size: clamp(40px, 7vw, 80px); line-height: 1; margin: 0 0 14px; }
.gradient-text { background: linear-gradient(135deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
/* Ensure gradient also applies when text is wrapped into spans */
.gradient-text .char { background: linear-gradient(135deg, var(--brand), var(--brand-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.subtitle { color: var(--muted); margin: 0 0 22px; font-weight: 500; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn { --btn-bg: var(--bg-elev); color: var(--text); border: 1px solid var(--card-border); background: var(--btn-bg); padding: 10px 16px; border-radius: 10px; text-decoration: none; transition: transform .1s ease, box-shadow .2s ease, background .2s ease; box-shadow: var(--shadow); }
.btn:hover { transform: translateY(-2px); }
.btn.primary { --btn-bg: linear-gradient(135deg, var(--brand), var(--brand-2)); color: white; border: 0; }
.btn.ghost { background: transparent; border-color: var(--card-border); }

/* Cards & Grid */
.grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 18px; }
.card { grid-column: span 12; padding: 18px; border-radius: 16px; border: 1px solid var(--card-border); background: var(--glass); backdrop-filter: blur(8px) saturate(140%); box-shadow: var(--shadow); text-decoration: none; color: inherit; }
.card-head { display: flex; align-items: center; gap: 10px; justify-content: flex-start; flex-wrap: wrap; margin-bottom: 6px; }
.card-head .badge { flex-shrink: 0; }
.card h3 { margin: 0; font-size: 20px; }
.card-head h3 {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
}
@media (max-width: 480px) {
  .card-head h3 { font-size: 18px; }
}
.card p { margin: 8px 0 10px; color: var(--muted); }
.card-meta { display: flex; gap: 8px; flex-wrap: wrap; }
.card-actions { margin-top: 8px; }

/* Badges & Pills */
.badge { display: inline-block; padding: 4px 10px; border-radius: 999px; font-size: 12px; color: white; background: linear-gradient(135deg, var(--brand), var(--brand-2)); box-shadow: 0 8px 20px rgba(14,165,233,.3); }
.pill-list, .card-meta { list-style: none; padding: 0; margin: 12px 0 0; }
.pill, .pill-list li { display: inline-block; padding: 6px 10px; border-radius: 999px; border: 1px solid var(--card-border); background: var(--glass); color: var(--text); font-size: 12px; }

/* Contact grid specifics */
.contact-grid .card { display: block; transition: transform .15s ease; }
.contact-grid .card:hover { transform: translateY(-3px); }

/* Responsive */
@media (min-width: 700px) {
  .card { grid-column: span 6; }
}
@media (min-width: 1000px) {
  .card { grid-column: span 4; }
}

/* Footer */
.site-footer { padding: 40px 0; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.text-link { color: var(--brand-2); text-decoration: none; }
.text-link:hover { text-decoration: underline; }
/* Animated back-to-top link */
.back-to-top { display: inline-flex; align-items: center; gap: 6px; animation: floatY 3s ease-in-out infinite; }
.back-to-top:hover { animation-duration: 1.5s; }
@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

/* Reveal animations */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* Tilt effect support */
.tilt { will-change: transform; transform-style: preserve-3d; }

/* Background canvas fills screen */
#bg { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -1; }

/* Glass utility */
.glass { background: var(--glass); border: 1px solid var(--card-border); backdrop-filter: blur(10px) saturate(140%); }

/* Section headings */
.section h2 { font-size: clamp(26px, 3.5vw, 36px); margin: 0 0 12px; }
.section p + .grid { margin-top: 18px; }

/* Collapsible details */
.collapsible { margin-top: 16px; }
.collapsible summary { display: flex; align-items: center; gap: 10px; cursor: pointer; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--card-border); background: var(--glass); color: var(--text); box-shadow: var(--shadow); user-select: none; }
.collapsible summary:hover { filter: brightness(1.05); }
.collapsible summary::marker, .collapsible summary::-webkit-details-marker { content: ''; display: none; }
.collapsible .toggle-icon { margin-left: 8px; transition: transform .2s ease; }
.collapsible[open] .toggle-icon { transform: rotate(180deg); }
.collapsible > .grid { margin-top: 14px; }

/* Wave hero name animation */
.wave { white-space: nowrap; }
.wave .char { display: inline-block; will-change: transform; animation: waveY 2.4s ease-in-out infinite; animation-delay: calc(var(--i) * 0.08s); }
@keyframes waveY {
  0% { transform: translateY(0) rotate(0deg); }
  25% { transform: translateY(-8px) rotate(-1deg); }
  50% { transform: translateY(0) rotate(0deg); }
  75% { transform: translateY(8px) rotate(1deg); }
  100% { transform: translateY(0) rotate(0deg); }
}
@media (prefers-reduced-motion: reduce) {
  .wave .char { animation: none !important; }
  .back-to-top { animation: none !important; }
}

/* Mobile tweaks */
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 52px 0 36px; }
  .site-header { margin: 8px auto; padding: 8px 12px; }
  .site-nav { gap: 10px; }
  .logo-hex { width: 32px; height: 32px; }
  .hero { padding-top: 88px; }
  .hero h1 { font-size: clamp(32px, 10vw, 64px); }
  .subtitle { font-size: 14px; margin-bottom: 16px; }
  .cta { gap: 8px; }
  .btn { padding: 10px 14px; }
  .grid { gap: 12px; }
  .collapsible summary { padding: 14px 16px; }
  .wave { white-space: normal; }
}

/* Additional mobile padding fixes + safe-area support */
@media (max-width: 480px) {
  .container {
    padding-left: max(16px, env(safe-area-inset-left));
    padding-right: max(16px, env(safe-area-inset-right));
  }
  .site-header {
    width: calc(100% - 32px);
    margin: 8px 16px;
  }
}

/* Mobile menu */
.menu-btn { display: none; }
@media (max-width: 700px) {
  .menu-btn { display: inline-flex; align-items: center; justify-content: center; }
  .site-nav a { display: none; }
  .site-nav.open a { display: inline-block; }
  .site-nav { gap: 12px; }
}

/* Extra small screens */
@media (max-width: 360px) {
  .cta { flex-direction: column; }
  .cta .btn { width: 100%; }
}

/* Tablet gutters and layout adjustments */
@media (max-width: 1024px) {
  .container {
    padding-left: max(20px, env(safe-area-inset-left));
    padding-right: max(20px, env(safe-area-inset-right));
  }
  .site-header { width: calc(100% - 40px); margin-left: 20px; margin-right: 20px; }
}

/* Mobile-specific background tuning to keep the glow balanced */
@media (max-width: 480px) {
  body {
    background: radial-gradient(700px 480px at -25% -25%, rgba(56,189,248,.24), transparent 48%),
                radial-gradient(700px 480px at 125% -25%, rgba(34,211,238,.14), transparent 48%),
                radial-gradient(650px 420px at 50% 125%, rgba(14,165,233,.14), transparent 54%),
                var(--bg);
  }
}