:root {
  --bg: #08080b;
  --bg-2: #0c0d12;
  --panel: #101118;
  --panel-2: #14161f;
  --line: #1f212c;
  --line-2: #2a2d3a;
  --text: #ececf1;
  --dim: #8f93a8;
  --dimmer: #5c6074;
  --accent: #ffb01f;
  --accent-2: #ff7a1a;
  --green: #3ddc84;
  --code: #c9ccd9;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: "Inter", system-ui, -apple-system, sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection { background: rgba(255, 176, 31, 0.28); }

code, pre, kbd { font-family: var(--mono); }
code { color: var(--code); font-size: 0.9em; padding: 0.12em 0.35em; background: rgba(255,255,255,0.055); border-radius: 5px; }
a { color: inherit; text-decoration: none; }

/* ---------- nav ---------- */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  backdrop-filter: blur(16px) saturate(1.2);
  background: rgba(8, 8, 11, 0.7);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.nav-inner {
  max-width: 1180px; margin: 0 auto; padding: 15px 28px;
  display: flex; align-items: center; justify-content: space-between;
}
.brand-mark {
  font-family: var(--mono); font-weight: 700; font-size: 1.05rem;
  color: #1a1204; background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 3px 10px; border-radius: 7px;
}
.nav-links { display: flex; align-items: center; gap: 28px; font-size: 0.88rem; }
.nav-links a { color: var(--dim); transition: color .15s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  color: #1a1204 !important; font-weight: 600;
  background: var(--accent); padding: 8px 18px; border-radius: 9px;
  transition: transform .15s var(--ease), box-shadow .15s;
}
.nav-cta:hover { transform: translateY(-1px); box-shadow: 0 8px 24px rgba(255,176,31,0.3); }

/* ---------- hero ---------- */
.hero { position: relative; padding: 150px 28px 110px; overflow: hidden; }
.grid-bg {
  position: absolute; inset: 0; z-index: -2;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 70% at 60% 0%, black 25%, transparent 72%);
}
.glow {
  position: absolute; top: -260px; right: -120px; width: 860px; height: 700px; z-index: -1;
  background: radial-gradient(closest-side, rgba(255, 176, 31, 0.13), transparent 70%);
  filter: blur(14px);
}
.hero-inner {
  max-width: 1180px; margin: 0 auto;
  display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center;
}

.badge {
  display: inline-block; font-family: var(--mono); font-size: 0.74rem;
  color: var(--accent); border: 1px solid rgba(255,176,31,0.28);
  padding: 6px 14px; border-radius: 100px; letter-spacing: 0.05em;
  margin-bottom: 28px;
}

h1 { font-size: clamp(2.9rem, 5.6vw, 4.6rem); font-weight: 800; letter-spacing: -0.04em; line-height: 1.04; }
.accent {
  background: linear-gradient(115deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.lede { color: var(--dim); font-size: 1.1rem; max-width: 480px; margin: 24px 0 34px; }
.lede code { color: var(--text); }

.hero-actions { display: flex; gap: 14px; margin-bottom: 46px; }
.btn { padding: 14px 26px; border-radius: 10px; font-weight: 600; font-size: 0.95rem; transition: all .18s var(--ease); }
.btn-primary { background: var(--accent); color: #1a1204; }
.btn-primary:hover { background: #ffbe4d; transform: translateY(-2px); box-shadow: 0 14px 34px rgba(255,176,31,0.28); }
.btn-ghost { border: 1px solid var(--line-2); color: var(--text); }
.btn-ghost:hover { border-color: var(--dimmer); background: rgba(255,255,255,0.04); }
.btn .arr { display: inline-block; margin-left: 8px; transition: transform .18s var(--ease); }
.btn-ghost:hover .arr { transform: translateX(4px); }

.hero-stats { display: flex; gap: 44px; }
.stat { display: flex; flex-direction: column; }
.stat-n { font-family: var(--mono); font-size: 1.7rem; font-weight: 600; color: var(--text); }
.stat-l { color: var(--dimmer); font-size: 0.78rem; letter-spacing: 0.04em; }

/* explorer */
.hero-explorer {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: 16px; box-shadow: 0 40px 120px rgba(0,0,0,0.55), 0 0 0 1px rgba(255,255,255,0.02) inset;
  overflow: hidden; animation: float-in .9s var(--ease) both;
}
@keyframes float-in { from { opacity: 0; transform: translateY(26px); } to { opacity: 1; transform: none; } }
.exp-bar {
  display: flex; align-items: center; gap: 8px;
  padding: 13px 18px; background: var(--panel-2); border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 0.78rem;
}
.dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #ff5f57; } .dot.y { background: #febc2e; } .dot.g { background: #28c840; }
.exp-title { color: var(--dim); margin-left: 8px; }
.exp-live { margin-left: auto; color: var(--green); font-size: 0.72rem; display: flex; align-items: center; gap: 7px; }
.pulse {
  width: 7px; height: 7px; border-radius: 50%; background: var(--green);
  box-shadow: 0 0 0 0 rgba(61,220,132,0.5); animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(61,220,132,0.45); }
  70% { box-shadow: 0 0 0 8px rgba(61,220,132,0); }
  100% { box-shadow: 0 0 0 0 rgba(61,220,132,0); }
}

.exp-body { display: grid; grid-template-columns: 1.25fr 1fr; min-height: 420px; }
.exp-tree {
  border-right: 1px solid var(--line); padding: 16px 18px;
  font-family: var(--mono); font-size: 0.85rem; overflow-y: auto; max-height: 420px;
}
.exp-row {
  display: flex; align-items: center; gap: 8px; padding: 3.5px 8px;
  border-radius: 7px; cursor: pointer; color: var(--code);
  transition: background .12s; white-space: nowrap;
}
.exp-row:hover { background: rgba(255,255,255,0.05); }
.exp-row.open { color: var(--accent); }
.exp-row .tick { color: var(--dimmer); width: 10px; font-size: 0.7rem; }
.exp-row .dir { color: var(--accent); }
.exp-row .file { color: var(--code); }
.exp-row.machine .dir { font-weight: 600; }
.exp-children { border-left: 1px solid var(--line-2); margin-left: 12px; padding-left: 6px; }
.exp-pane { background: var(--bg); padding: 16px 18px; max-height: 420px; overflow-y: auto; }
.exp-pane-bar {
  font-family: var(--mono); font-size: 0.72rem; color: var(--dimmer);
  padding-bottom: 10px; border-bottom: 1px solid var(--line); margin-bottom: 12px;
}
.exp-pane pre { font-family: var(--mono); font-size: 0.8rem; line-height: 1.7; color: var(--code); white-space: pre-wrap; }
.exp-pane .key { color: var(--accent); }
.exp-pane .num { color: #7bd2ff; }
.exp-pane .str { color: var(--green); }

/* ---------- sections ---------- */
.section { padding: 120px 28px; position: relative; }
.section-dark { background: var(--bg-2); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

.section-grid {
  max-width: 1180px; margin: 0 auto; display: grid;
  grid-template-columns: 1fr 1.15fr; gap: 80px; align-items: start;
}
.kicker {
  font-family: var(--mono); text-transform: uppercase; letter-spacing: 0.2em;
  color: var(--accent); font-size: 0.7rem; margin-bottom: 20px;
}
h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); font-weight: 700; letter-spacing: -0.025em; line-height: 1.18; }
.sg-right .lead { color: var(--dim); font-size: 1.05rem; margin-bottom: 40px; max-width: 560px; }

/* mapping */
.mapping { border-top: 1px solid var(--line-2); }
.map-row {
  display: grid; grid-template-columns: 1fr 44px 1fr; align-items: center;
  padding: 15px 0; border-bottom: 1px solid var(--line);
  font-family: var(--mono); font-size: 0.92rem;
}
.map-row code { background: none; padding: 0; color: var(--accent); font-size: 0.92rem; }
.map-old { color: var(--dimmer); text-decoration: line-through; }
.arrow { text-align: center; color: var(--dimmer); }
.idea-line { margin-top: 34px; color: var(--dim); font-size: 1.02rem; }
.idea-line em { color: var(--text); font-style: normal; border-bottom: 1px solid rgba(255,176,31,0.5); padding-bottom: 1px; }

/* features */
.section-head { max-width: 720px; margin: 0 auto 70px; text-align: center; }
.section-sub { color: var(--dim); margin-top: 16px; }
.feat-list { max-width: 1040px; margin: 0 auto; border-top: 1px solid var(--line-2); }
.feat {
  display: grid; grid-template-columns: 90px 1.2fr 1fr; gap: 30px;
  padding: 44px 8px; border-bottom: 1px solid var(--line);
  transition: background .2s;
}
.feat:hover { background: rgba(255,255,255,0.014); }
.feat-num { font-family: var(--mono); color: var(--dimmer); font-size: 0.9rem; padding-top: 4px; }
.feat-body h3 { font-size: 1.3rem; font-weight: 700; letter-spacing: -0.015em; margin-bottom: 10px; }
.feat-body h3 code { color: var(--accent); }
.feat-body p { color: var(--dim); font-size: 0.96rem; max-width: 520px; }
.feat-snip pre {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; overflow-x: auto;
}
.feat-snip code { background: none; padding: 0; font-size: 0.84rem; line-height: 1.7; }

/* session terminal */
.terminal.big {
  max-width: 740px; margin: 0 auto; background: var(--panel);
  border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 40px 120px rgba(0,0,0,0.5); overflow: hidden;
}
.cmd-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 12px 18px; background: var(--panel-2); border-bottom: 1px solid var(--line);
}
.cmd-bar span { width: 11px; height: 11px; border-radius: 50%; }
.cmd-bar span:nth-child(1) { background: #ff5f57; }
.cmd-bar span:nth-child(2) { background: #febc2e; }
.cmd-bar span:nth-child(3) { background: #28c840; }
.cmd-title { margin-left: auto; color: var(--dimmer); font-size: 0.75rem; font-family: var(--mono); }
.terminal pre { padding: 24px 28px; min-height: 470px; overflow-x: auto; }
.terminal code { background: none; padding: 0; font-size: 0.9rem; line-height: 1.8; color: var(--code); white-space: pre-wrap; }
.p { color: var(--accent); }
.dim { color: var(--dimmer); }
.cursor { display: inline-block; color: var(--accent); animation: blink 1.1s steps(1) infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* architecture */
.arch {
  max-width: 1080px; margin: 0 auto; display: grid;
  grid-template-columns: 1fr 190px 1fr; gap: 26px; align-items: center;
}
.arch-node {
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  padding: 28px 26px; position: relative;
}
.arch-node:hover { border-color: rgba(255,176,31,0.35); }
.arch-node-icon { font-size: 1.4rem; color: var(--accent); margin-bottom: 12px; font-family: var(--mono); }
.arch-node h3 { font-family: var(--mono); color: var(--accent); font-size: 1.05rem; margin-bottom: 8px; }
.arch-node p { color: var(--dim); font-size: 0.88rem; margin-bottom: 16px; }
.arch-tag {
  font-family: var(--mono); font-size: 0.68rem; color: var(--dimmer);
  border: 1px solid var(--line-2); border-radius: 100px; padding: 3px 11px;
}
.arch-links { display: flex; flex-direction: column; gap: 22px; }
.arch-link { position: relative; height: 34px; }
.arch-link::before {
  content: ""; position: absolute; top: 50%; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,176,31,0.55), transparent);
}
.flow {
  position: absolute; top: 50%; width: 6px; height: 6px; margin-top: -3px;
  background: var(--accent); border-radius: 50%;
  animation: flow 2.6s var(--ease) infinite;
}
@keyframes flow {
  0% { left: 0; opacity: 0; }
  15% { opacity: 1; }
  85% { opacity: 1; }
  100% { left: calc(100% - 6px); opacity: 0; }
}
.tree { max-width: 600px; margin: 60px auto 0; background: var(--panel); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; }
.tree pre { padding: 22px 26px; overflow-x: auto; }
.tree code { background: none; padding: 0; font-size: 0.88rem; line-height: 1.9; }

/* security */
.sec-item { border-top: 1px solid var(--line-2); padding: 26px 0 26px; }
.sec-item:first-child { border-top: none; padding-top: 0; }
.sec-item h3 { font-size: 1.12rem; margin-bottom: 8px; }
.sec-n {
  display: inline-block; font-family: var(--mono); font-size: 0.72rem;
  color: var(--accent); border: 1px solid rgba(255,176,31,0.3); border-radius: 6px;
  padding: 0 8px; margin-right: 10px; vertical-align: 2px;
}
.sec-item p { color: var(--dim); font-size: 0.95rem; }

/* deploy */
.hero-cmd {
  max-width: 660px; margin: 0 auto; text-align: left;
  background: var(--panel); border: 1px solid var(--line); border-radius: 16px;
  box-shadow: 0 40px 120px rgba(0,0,0,0.5); overflow: hidden;
}
.hero-cmd.center { margin-top: 44px; }
.hero-cmd pre { padding: 22px 26px; overflow-x: auto; }
.hero-cmd code { background: none; padding: 0; font-size: 0.92rem; line-height: 1.8; }

/* start */
.start-grid { max-width: 820px; margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.start-step {
  position: relative; background: var(--panel); border: 1px solid var(--line);
  border-radius: 16px; padding: 30px;
}
.step-num {
  position: absolute; top: -15px; left: 26px;
  font-family: var(--mono); font-weight: 700; color: #1a1204;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  padding: 3px 12px; border-radius: 100px; font-size: 0.85rem;
}
.start-step h3 { font-family: var(--mono); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--dim); margin-bottom: 16px; }
.start-step pre { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px; }
.start-step pre code { background: none; padding: 0; color: var(--accent); font-size: 0.92rem; }
.step-note { color: var(--dim); font-size: 0.88rem; margin-top: 16px; }
.final { text-align: center; color: var(--dimmer); margin-top: 60px; font-size: 0.9rem; }

/* footer */
.footer { border-top: 1px solid var(--line); padding: 60px 28px 44px; background: var(--bg-2); }
.footer-inner {
  max-width: 1180px; margin: 0 auto; display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr; gap: 40px;
}
.f-brand .brand-mark { display: inline-block; margin-bottom: 14px; }
.f-brand p { color: var(--dimmer); font-size: 0.86rem; }
.f-col { display: flex; flex-direction: column; gap: 10px; }
.f-col h4 { font-family: var(--mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.16em; color: var(--dimmer); margin-bottom: 6px; }
.f-col a { color: var(--dim); font-size: 0.9rem; transition: color .15s; }
.f-col a:hover { color: var(--text); }
.f-status { color: var(--green); font-size: 0.86rem; display: flex; align-items: center; gap: 8px; font-family: var(--mono); }
.f-meta { color: var(--dimmer); font-size: 0.78rem; font-family: var(--mono); }

/* reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.visible { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  html { scroll-behavior: auto; }
}

@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 52px; }
  .hero { padding-top: 130px; }
  .feat { grid-template-columns: 1fr; gap: 16px; }
  .feat-num { padding: 0; }
  .section-grid { grid-template-columns: 1fr; gap: 40px; }
  .arch { grid-template-columns: 1fr; }
  .arch-links { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .nav-links a:not(.nav-cta) { display: none; }
  .start-grid { grid-template-columns: 1fr; }
}