/* ========== Base ========== */
:root{
  --bg0:#070a12;
  --bg1:#0b1020;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.10);
  --stroke: rgba(255,255,255,.12);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.70);
  --muted2: rgba(255,255,255,.55);
  --shadow: 0 18px 60px rgba(0,0,0,.45);
  --shadow2: 0 10px 30px rgba(0,0,0,.35);
  --accent1:#6ddcff;
  --accent2:#9b7bff;
  --accent3:#7dffa8;
  --radius: 18px;
  --radius2: 26px;
  --max: 1100px;
}

[data-theme="light"]{
  --bg0:#f6f7fb;
  --bg1:#eef1ff;
  --card: rgba(0,0,0,.04);
  --card2: rgba(0,0,0,.06);
  --stroke: rgba(0,0,0,.10);
  --text: rgba(10,12,20,.92);
  --muted: rgba(10,12,20,.72);
  --muted2: rgba(10,12,20,.56);
  --shadow: 0 18px 60px rgba(0,0,0,.12);
  --shadow2: 0 10px 30px rgba(0,0,0,.10);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color:var(--text);
  background:
    radial-gradient(1200px 800px at 20% 10%, rgba(109,220,255,.18), transparent 55%),
    radial-gradient(1000px 700px at 80% 20%, rgba(155,123,255,.16), transparent 55%),
    radial-gradient(800px 600px at 60% 90%, rgba(125,255,168,.12), transparent 55%),
    linear-gradient(180deg, var(--bg0), var(--bg1));
  overflow-x:hidden;
}

a{color:inherit;text-decoration:none}
.container{width:min(var(--max), calc(100% - 40px)); margin:0 auto}

.skip-link{
  position:absolute;left:-9999px;top:10px;
  padding:10px 12px;border-radius:10px;
  background:var(--card2);border:1px solid var(--stroke);
}
.skip-link:focus{left:10px; z-index:50}

/* Background layers */
#bg{
  position:fixed; inset:0;
  width:100%; height:100%;
  z-index:-3;
}
.bg-noise{
  position:fixed; inset:0;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='160' height='160' filter='url(%23n)' opacity='.22'/%3E%3C/svg%3E");
  opacity:.06;
  z-index:-2;
  pointer-events:none;
  mix-blend-mode: overlay;
}

/* ========== Header ========== */
.site-header{
  position:sticky; top:0;
  z-index:20;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: linear-gradient(180deg, rgba(0,0,0,.22), rgba(0,0,0,.08));
  border-bottom: 1px solid rgba(255,255,255,.08);
}
[data-theme="light"] .site-header{
  background: linear-gradient(180deg, rgba(255,255,255,.65), rgba(255,255,255,.35));
  border-bottom: 1px solid rgba(0,0,0,.08);
}

.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 0;
  gap:16px;
}

.brand{display:flex; align-items:center; gap:12px}
.brand-mark{
  width:34px;height:34px;border-radius:12px;
  background: linear-gradient(135deg, rgba(109,220,255,.25), rgba(155,123,255,.22));
  border:1px solid rgba(255,255,255,.18);
  position:relative;
  box-shadow: var(--shadow2);
}
.brand-mark .dot{
  position:absolute; inset:0;
  width:10px;height:10px;border-radius:999px;
  background: radial-gradient(circle at 30% 30%, rgba(255,255,255,.9), rgba(255,255,255,.2));
  left:10px; top:11px;
}
.brand-mark .ring{
  position:absolute; inset:0;
  width:18px;height:18px;border-radius:999px;
  border:2px solid rgba(255,255,255,.20);
  left:8px; top:7px;
}

.brand-title{font-weight:750; letter-spacing:.2px}
.brand-subtitle{font-size:.85rem; color:var(--muted2)}

.nav{display:flex; align-items:center; gap:12px}
.nav-links{display:flex; gap:14px; align-items:center}
.nav-links a{
  padding:10px 10px;border-radius:12px;
  color:var(--muted);
  transition: transform .18s ease, background .18s ease, color .18s ease;
}
.nav-links a:hover{background:var(--card); color:var(--text); transform: translateY(-1px)}
.nav-links .pill{
  border:1px solid var(--stroke);
  background: linear-gradient(135deg, rgba(109,220,255,.12), rgba(155,123,255,.10));
  color:var(--text);
}

/* Mobile nav */
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border-radius:14px;
  border:1px solid var(--stroke);
  background:var(--card);
  box-shadow: var(--shadow2);
  cursor:pointer;
}
.nav-toggle span{
  display:block;
  height:2px; width:18px;
  margin:5px auto;
  background: rgba(255,255,255,.75);
}
[data-theme="light"] .nav-toggle span{background: rgba(0,0,0,.65)}

@media (max-width: 860px){
  .nav-toggle{display:block}
  .nav-links{
    position:absolute;
    right:20px;
    top:66px;
    display:none;
    flex-direction:column;
    align-items:stretch;
    gap:6px;
    padding:10px;
    width:min(320px, calc(100vw - 40px));
    border-radius: var(--radius);
    border:1px solid var(--stroke);
    background: rgba(10,14,26,.72);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
  }
  [data-theme="light"] .nav-links{background: rgba(255,255,255,.75)}
  .nav-links a{padding:12px 12px}
  .nav-links.open{display:flex}
}

/* ========== Hero ========== */
.hero{padding:48px 0 18px}
.hero-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:22px;
  align-items:start;
}
@media (max-width: 980px){
  .hero-grid{grid-template-columns:1fr; gap:16px}
}

.kicker{
  display:inline-block;
  padding:8px 10px;
  border-radius:999px;
  border:1px solid var(--stroke);
  background: var(--card);
  color: var(--muted);
  font-weight: 650;
  font-size: .85rem;
  letter-spacing:.3px;
}

.hero-copy h1{
  margin:14px 0 12px;
  font-size: clamp(2.1rem, 2.8vw + 1.4rem, 3.5rem);
  line-height:1.05;
  letter-spacing:-.6px;
}
.accent{
  background: linear-gradient(135deg, var(--accent1), var(--accent2), var(--accent3));
  -webkit-background-clip:text;
  background-clip:text;
  color: transparent;
}

.lede{
  margin:0 0 16px;
  font-size:1.05rem;
  color: var(--muted);
  max-width: 70ch;
}

.hero-cta{display:flex; gap:10px; flex-wrap:wrap; margin-top:14px}

/* Buttons */
.btn{
  display:inline-flex; align-items:center; gap:10px;
  padding:12px 14px;
  border-radius: 14px;
  border:1px solid var(--stroke);
  background: var(--card);
  color: var(--text);
  box-shadow: var(--shadow2);
  transition: transform .18s ease, background .18s ease;
}
.btn:hover{transform: translateY(-1px); background: var(--card2)}
.btn.primary{
  border-color: rgba(109,220,255,.28);
  background: linear-gradient(135deg, rgba(109,220,255,.16), rgba(155,123,255,.14));
}
.btn.ghost{
  background: transparent;
  border:1px dashed rgba(255,255,255,.20);
}
[data-theme="light"] .btn.ghost{border-color: rgba(0,0,0,.20)}
.btn-icon{font-size:1.05rem}

.hero-metrics{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap:10px;
  margin-top:18px;
}
@media (max-width: 620px){
  .hero-metrics{grid-template-columns:1fr; }
}
.metric{
  padding:14px 14px;
  border-radius: var(--radius);
  border:1px solid var(--stroke);
  background: var(--card);
}
.metric-num{font-weight:800; font-size:1.5rem}
.metric-label{color: var(--muted2); font-size:.88rem; margin-top:2px}

/* Cards */
.card{
  border-radius: var(--radius2);
  border: 1px solid var(--stroke);
  background: rgba(255,255,255,.05);
  box-shadow: var(--shadow);
  padding: 16px;
}
[data-theme="light"] .card{background: rgba(255,255,255,.70)}
.card.glass{
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.04));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.card.note{
  margin-top:12px;
  padding:16px;
  background: linear-gradient(135deg, rgba(109,220,255,.10), rgba(155,123,255,.08));
}
.card-header{
  display:flex; align-items:flex-start; justify-content:space-between;
  gap:10px;
}
.card-title{margin:0; font-size:1.2rem}
.card-subtitle{margin:4px 0 0; color: var(--muted2); font-size:.92rem}
.card-footer{
  display:flex; gap:10px; flex-wrap:wrap;
  margin-top:12px;
}

/* Chip */
.chip{
  display:inline-flex; align-items:center; gap:8px;
  padding:8px 10px;
  border-radius:999px;
  border:1px solid var(--stroke);
  background: var(--card);
  font-size:.9rem;
}
.chip-dot{
  width:8px;height:8px;border-radius:999px;
  background: radial-gradient(circle at 30% 30%, rgba(125,255,168,.95), rgba(125,255,168,.25));
  box-shadow: 0 0 0 4px rgba(125,255,168,.10);
}

/* Quick grid */
.quick-grid{
  display:grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap:10px;
  margin-top:12px;
}
@media (max-width: 520px){
  .quick-grid{grid-template-columns:1fr}
}
.quick{
  padding:12px;
  border-radius: 18px;
  border:1px solid var(--stroke);
  background: var(--card);
  transition: transform .18s ease, background .18s ease;
}
.quick:hover{transform: translateY(-1px); background: var(--card2)}
.quick-emoji{font-size:1.3rem}
.quick-title{margin-top:8px; font-weight:760}
.quick-meta{margin-top:2px; color: var(--muted2); font-size:.9rem}

/* Note */
.note-title{font-weight:800}
.note-text{color: var(--muted); margin:8px 0 12px}
.note-tags{display:flex; gap:8px; flex-wrap:wrap}
.tag{
  display:inline-flex;
  padding:7px 10px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background: rgba(0,0,0,.18);
  color: var(--muted);
  font-size:.85rem;
}
[data-theme="light"] .tag{background: rgba(255,255,255,.7)}

/* Sections */
.section{padding:34px 0}
.section.alt{
  background: linear-gradient(180deg, rgba(255,255,255,.02), transparent);
}
.section-head{
  display:flex; align-items:flex-end; justify-content:space-between;
  gap:14px;
  margin-bottom:14px;
}
.section-head h2{
  margin:0;
  font-size: 1.8rem;
  letter-spacing:-.3px;
}
.section-head p{margin:0; color: var(--muted); max-width: 65ch}
@media (max-width: 760px){
  .section-head{flex-direction:column; align-items:flex-start}
}

/* Cards grid */
.cards{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap:12px;
}
@media (max-width: 980px){
  .cards{grid-template-columns: repeat(2, minmax(0, 1fr))}
}
@media (max-width: 560px){
  .cards{grid-template-columns: 1fr}
}
.card-icon{font-size:1.35rem}
.card h3{margin:10px 0 6px}
.card p{margin:0; color: var(--muted); line-height:1.45}
.card-actions{
  margin-top:12px;
  display:flex; justify-content:space-between; align-items:center;
  gap:10px; flex-wrap:wrap;
}
.link{color: var(--text); opacity:.9}
.link:hover{text-decoration: underline}
.link-btn{
  border:none;
  background: transparent;
  color: var(--muted);
  padding:0;
  cursor:pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}
.link-btn:hover{color: var(--text)}

/* Timeline */
.timeline{margin-top:6px}
.tl-item{
  display:grid;
  grid-template-columns: 18px 1fr;
  gap:12px;
  padding:10px 0;
}
.tl-dot{
  width:10px;height:10px;border-radius:999px;
  margin-top:8px;
  background: radial-gradient(circle at 30% 30%, rgba(109,220,255,.95), rgba(155,123,255,.35));
  box-shadow: 0 0 0 6px rgba(109,220,255,.10);
}
.tl-card{
  border-radius: var(--radius2);
  border: 1px solid var(--stroke);
  background: var(--card);
  padding:14px;
}
.tl-card h3{margin:0 0 6px}
.tl-card p{margin:0; color: var(--muted); line-height:1.5}
.meta-row{display:flex; gap:8px; flex-wrap:wrap; margin-top:10px}
.badge{
  border-radius:999px;
  border:1px solid var(--stroke);
  padding:7px 10px;
  background: rgba(0,0,0,.16);
  color: var(--muted);
  font-size:.85rem;
}
[data-theme="light"] .badge{background: rgba(255,255,255,.7)}

/* Callout */
.callout{
  margin-top:14px;
  padding:16px;
  border-radius: var(--radius2);
}
.callout-title{font-weight:850; font-size:1.1rem}
.callout-text{margin:8px 0 12px; color: var(--muted); line-height:1.55}
.callout-actions{display:flex; gap:10px; flex-wrap:wrap}

/* Links grid */
.link-grid{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap:12px;
}
@media (max-width: 980px){
  .link-grid{grid-template-columns: repeat(2, minmax(0, 1fr))}
}
@media (max-width: 560px){
  .link-grid{grid-template-columns: 1fr}
}
.link-card{
  border-radius: var(--radius2);
  border: 1px solid var(--stroke);
  background: var(--card);
  padding:14px;
  transition: transform .18s ease, background .18s ease;
}
.link-card:hover{transform: translateY(-1px); background: var(--card2)}
.lc-top{display:flex; gap:12px; align-items:center}
.lc-icon{font-size:1.4rem}
.lc-title{font-weight:800}
.lc-sub{color: var(--muted2); font-size:.9rem; margin-top:2px}
.lc-desc{color: var(--muted); margin-top:10px; line-height:1.45}

/* Contact */
.contact-grid{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:12px;
}
@media (max-width: 980px){
  .contact-grid{grid-template-columns:1fr}
}
.muted{color: var(--muted2)}
.template{
  border-radius: 18px;
  border:1px solid var(--stroke);
  background: rgba(0,0,0,.18);
  padding:12px;
  overflow:auto;
}
[data-theme="light"] .template{background: rgba(255,255,255,.65)}
pre{margin:0; white-space:pre-wrap; line-height:1.45; color: var(--text)}
.checklist{margin:10px 0 0; padding-left: 18px; color: var(--muted); line-height:1.75}
.small{margin-top:12px; color: var(--muted2); line-height:1.5}
code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  font-size: .92em;
  padding: 2px 6px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: rgba(0,0,0,.18);
}
[data-theme="light"] code{background: rgba(255,255,255,.75)}

/* Footer */
.site-footer{
  padding:28px 0 40px;
  border-top:1px solid rgba(255,255,255,.08);
  margin-top: 24px;
}
[data-theme="light"] .site-footer{border-top:1px solid rgba(0,0,0,.08)}
.footer-inner{display:flex; justify-content:space-between; align-items:center; gap:12px}
.footer-title{font-weight:850}
.footer-sub{color: var(--muted2); font-size:.9rem; margin-top:4px}

.mini-btn{
  display:inline-flex; align-items:center; justify-content:center;
  border-radius: 14px;
  border:1px solid var(--stroke);
  background: var(--card);
  padding:10px 12px;
  color: var(--text);
  cursor:pointer;
  transition: transform .18s ease, background .18s ease;
}
.mini-btn:hover{transform: translateY(-1px); background: var(--card2)}

/* Toast */
.toast{
  position: fixed;
  left: 50%;
  bottom: 22px;
  transform: translateX(-50%);
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--stroke);
  background: rgba(10,14,26,.78);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
  color: var(--text);
  max-width: min(560px, calc(100% - 24px));
  opacity: 0;
  pointer-events:none;
  transition: opacity .22s ease, transform .22s ease;
  z-index: 30;
}
[data-theme="light"] .toast{background: rgba(255,255,255,.80)}
.toast.show{
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* Motion preferences */
@media (prefers-reduced-motion: reduce){
  *{scroll-behavior:auto !important; transition:none !important; animation:none !important}
}