:root{
  --bg: #0b0d12;
  --panel: rgba(255,255,255,.06);
  --panel-2: rgba(255,255,255,.04);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.68);
  --border: rgba(255,255,255,.12);
  --shadow: 0 20px 45px rgba(0,0,0,.45);
  --accent: #7c5cff;
  --accent-2: #00d4ff;
  --radius: 18px;
  --wrap: 1120px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono","Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
}
:root[data-theme="light"]{
  --bg: #f7f8fb;
  --panel: rgba(0,0,0,.04);
  --panel-2: rgba(0,0,0,.03);
  --text: rgba(10,14,20,.92);
  --muted: rgba(10,14,20,.65);
  --border: rgba(10,14,20,.14);
  --shadow: 0 18px 40px rgba(0,0,0,.12);
}

*{ box-sizing: border-box; }
html,body{ height: 100%; }
body{
  margin:0;
  font-family: var(--sans);
  background: radial-gradient(1200px 700px at 15% 10%, rgba(124,92,255,.25), transparent 55%),
              radial-gradient(1200px 700px at 85% 0%, rgba(0,212,255,.18), transparent 50%),
              var(--bg);
  color: var(--text);
  line-height: 1.5;
}

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

.wrap{ max-width: var(--wrap); margin: 0 auto; padding: 0 20px; }

.skip{
  position:absolute; left:-999px; top:10px;
  background: var(--text); color: var(--bg);
  padding: 10px 12px; border-radius: 10px;
}
.skip:focus{ left: 10px; z-index: 999; }

.site-header{
  position: sticky; top: 0; z-index: 50;
  backdrop-filter: blur(10px);
  background: color-mix(in srgb, var(--bg) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  display:flex; align-items:center; justify-content: space-between;
  padding: 14px 20px;
}
.brand{ display:flex; align-items:center; gap: 10px; }
.brand-text{ font-weight: 650; letter-spacing: .2px; }
.mark{
  width: 14px; height: 14px; border-radius: 5px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 25%, transparent);
}

.nav{ display:flex; align-items:center; gap: 14px; }
.nav-links{ display:flex; align-items:center; gap: 10px; }
.nav-link{
  padding: 8px 10px;
  border-radius: 12px;
  color: var(--muted);
  font-size: 14px;
}
.nav-link:hover{ background: var(--panel); color: var(--text); text-decoration: none; }
.site-header[data-active="home"] .nav-link[data-key="home"],
.site-header[data-active="about"] .nav-link[data-key="about"],
.site-header[data-active="tutorials"] .nav-link[data-key="tutorials"],
.site-header[data-active="articles"] .nav-link[data-key="articles"],
.site-header[data-active="team"] .nav-link[data-key="team"],
.site-header[data-active="versions"] .nav-link[data-key="versions"]{
  background: var(--panel);
  color: var(--text);
}

.nav-toggle{
  display:none;
  width: 42px; height: 42px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
}
.burger{
  display:block;
  width: 18px; height: 2px;
  background: currentColor;
  margin: 0 auto;
  position: relative;
}
.burger::before, .burger::after{
  content:"";
  position:absolute; left:0;
  width: 18px; height: 2px;
  background: currentColor;
}
.burger::before{ top: -6px; }
.burger::after{ top: 6px; }

.mode{
  width: 42px; height: 42px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}
.mode:hover{ filter: brightness(1.05); }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  gap: 8px;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid transparent;
  font-weight: 650;
  letter-spacing: .2px;
  text-decoration: none !important;
  transition: transform .08s ease, filter .08s ease, background .15s ease;
}
.btn:active{ transform: translateY(1px); }
.btn-small{ padding: 10px 12px; border-radius: 12px; font-weight: 600; }
.btn-primary{
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #061018;
  border-color: rgba(255,255,255,.18);
}
.btn-secondary{
  background: var(--panel);
  border-color: var(--border);
  color: var(--text);
}
.btn-ghost{
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn:hover{ filter: brightness(1.04); }

.hero{
  position: relative;
  padding: 56px 0 10px;
  overflow:hidden;
}
.bg-shape{
  position:absolute; inset:auto -30% -55% -30%;
  height: 380px;
  background: radial-gradient(closest-side, rgba(124,92,255,.18), transparent 65%);
  filter: blur(18px);
  transform: rotate(8deg);
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap: 26px;
  align-items: start;
}
.kicker{
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .6px;
  text-transform: uppercase;
}
.hero h1{
  margin: 10px 0 6px;
  font-size: clamp(2.4rem, 5vw, 3.5rem);
  letter-spacing: -0.6px;
}
.lead{
  margin: 0 0 18px;
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 56ch;
}
.cta{ display:flex; flex-wrap: wrap; gap: 10px; margin: 14px 0 14px; }

.hero-panel{ display:grid; gap: 12px; }
.panel{
  padding: 16px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
}
.panel.subtle{ background: var(--panel-2); box-shadow: none; }
.panel-header{ display:flex; align-items:center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.panel-actions{ display:flex; gap: 10px; margin-top: 12px; flex-wrap: wrap; }

.badge{
  display:inline-flex;
  padding: 5px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 70%, transparent);
  font-size: 12px;
  color: var(--muted);
  font-family: var(--mono);
}
.pill-row{ display:flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.pill{
  display:inline-flex;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
}

.section{ padding: 36px 0; }
.section-head{ margin-bottom: 16px; }
.section-head h2{ margin: 0 0 8px; font-size: 1.6rem; letter-spacing: -0.4px; }
.row-between{ display:flex; align-items:flex-end; justify-content: space-between; gap: 14px; }

.muted{ color: var(--muted); }
.tiny{ font-size: 12.5px; line-height: 1.35; }
.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; }

.grid{ display:grid; gap: 14px; }
.grid-3{ grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-2{ grid-template-columns: repeat(2, minmax(0,1fr)); }
.narrow{ max-width: 820px; }

.card{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow:hidden;
  min-height: 100%;
}
.card-media{
  display:block;
  aspect-ratio: 16/9;
  overflow:hidden;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--panel) 80%, transparent);
}
.card-media img{
  width:100%; height:100%;
  object-fit: cover;
  transform: scale(1.02);
}
.card-body{ padding: 14px 14px 16px; }
.card-top{ display:flex; align-items:center; justify-content: space-between; gap: 10px; margin-bottom: 10px; }
.card-title{ margin: 0 0 8px; font-size: 1.05rem; letter-spacing: -0.25px; }
.card-actions{ margin-top: 12px; display:flex; gap: 10px; flex-wrap: wrap; }

.feature{
  padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel-2);
}
.feature h3{ margin: 0 0 6px; font-size: 1.05rem; }
.feature p{ margin: 0; }

.callout{
  margin-top: 16px;
  padding: 16px;
  border-radius: var(--radius);
  border: 1px dashed color-mix(in srgb, var(--border) 80%, transparent);
  background: color-mix(in srgb, var(--panel) 55%, transparent);
  display:flex; align-items:center; justify-content: space-between; gap: 16px;
}
.callout h3{ margin: 0 0 6px; }
.callout p{ margin: 0; }

.page-hero{
  padding: 44px 0 10px;
}
.page-hero h1{ margin: 0; font-size: clamp(2rem, 4vw, 2.8rem); letter-spacing: -0.6px; }
.page-hero p{ margin: 10px 0 0; max-width: 70ch; }

.person .person-top{
  display:flex; gap: 12px; align-items: center;
  padding: 14px 14px 0;
}
.person .card-title{ margin: 0; }
.avatar{
  width: 56px; height: 56px; border-radius: 16px;
  object-fit: cover;
  border: 1px solid var(--border);
}
.person .muted{ padding: 0 14px; }
.person .pill-row{ padding: 0 14px 14px; margin-top: 10px; }
.divider{ height: 1px; background: var(--border); margin: 10px 14px; }

.site-footer{
  margin-top: 40px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--bg) 85%, transparent);
}
.footer-grid{
  padding: 28px 20px;
  display:grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 18px;
}
.footer-block h3{ margin: 0 0 10px; font-size: 1rem; }
.footer-brand{ margin-bottom: 10px; }
.footer-bottom{
  padding: 12px 20px 20px;
  display:flex; align-items:center; justify-content: space-between; gap: 12px;
  border-top: 1px solid var(--border);
}
.footer-actions{ display:flex; align-items:center; gap: 10px; }
.list{ list-style:none; padding:0; margin:0; display:grid; gap: 8px; }
.dot{
  display:inline-block; width: 8px; height: 8px;
  border-radius: 4px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  margin-right: 8px;
  transform: translateY(1px);
}
.bullets{ margin: 10px 0 0; color: var(--muted); }
.bullets li{ margin: 6px 0; }

.toolbar{
  display:flex; align-items:center; justify-content: space-between; gap: 12px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.search input{
  width: min(520px, 80vw);
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  outline: none;
}
.search input:focus{ border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 18%, transparent); }
.filters{ display:flex; gap: 8px; flex-wrap: wrap; }
.chip{
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--muted);
  cursor: pointer;
}
.chip.is-active{ background: var(--panel); color: var(--text); }

@media (max-width: 980px){
  .hero-grid{ grid-template-columns: 1fr; }
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
  .footer-grid{ grid-template-columns: 1fr; }
  .footer-bottom{ flex-direction: column; align-items: flex-start; }
  .nav-toggle{ display:inline-flex; align-items:center; justify-content:center; }
  .nav-links{
    display:none;
    position:absolute;
    right: 20px;
    top: 66px;
    padding: 12px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: color-mix(in srgb, var(--bg) 90%, transparent);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow);
    flex-direction: column;
    gap: 6px;
    min-width: 220px;
  }
  .nav-links.is-open{ display:flex; }
  .nav{ position: relative; }
}