:root {
  --bg: #0b1120;
  --bg-2: #0f172a;
  --panel: #131c31;
  --panel-2: #1a2438;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #e6edf6;
  --muted: #8b97ac;
  --muted-2: #6b7688;
  --accent: #f59e0b;
  --accent-2: #f97316;
  --green: #22c55e;
  --blue: #3b82f6;
  --purple: #a855f7;
  --red: #ef4444;
  --mono: "JetBrains Mono", "SF Mono", "Fira Code", Consolas, monospace;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(59, 130, 246, 0.10), transparent 60%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* ---------- Header ---------- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 40px;
  border-bottom: 1px solid var(--border);
  background: rgba(11, 17, 32, 0.7);
  backdrop-filter: blur(10px);
  position: sticky;
  top: 0;
  z-index: 50;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 18px;
}
.brand .logo {
  width: 34px;
  height: 34px;
  border-radius: 9px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1206;
  font-size: 16px;
}

.nav {
  display: flex;
  gap: 6px;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 9px 16px;
  border-radius: 8px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  border: none;
  background: transparent;
  position: relative;
  transition: color .15s, background .15s;
}
.nav-item:hover { color: var(--text); background: rgba(255,255,255,0.04); }
.nav-item.active { color: var(--accent); }
.nav-item.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: -17px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.ghost-btn {
  background: #1e2536;
  color: var(--text);
  border: 1px solid var(--border-strong);
  padding: 9px 16px;
  border-radius: 8px;
  font-size: 13px;
  cursor: pointer;
}

/* ---------- Layout ---------- */
.page { display: none; padding: 48px 40px 80px; max-width: 1180px; margin: 0 auto; }
.page.active { display: block; animation: fade .25s ease; }
@keyframes fade { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }

.section-title { text-align: center; }
.section-title h1 { font-size: 40px; letter-spacing: -0.02em; }
.section-title h1 .db-ico { color: var(--accent); }
.section-title p { color: var(--muted); margin-top: 10px; font-size: 16px; }

/* ---------- Browse hero ---------- */
.hero { text-align: center; padding: 30px 0 46px; }
.pill {
  display: inline-block;
  background: rgba(245, 158, 11, 0.12);
  color: var(--accent);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 24px;
}
.hero h1 { font-size: 52px; letter-spacing: -0.03em; line-height: 1.05; }
.hero .sub { color: var(--muted); font-size: 18px; margin: 18px auto 0; max-width: 560px; }
.tags { display: flex; justify-content: center; gap: 30px; margin-top: 26px; color: var(--muted-2); font-size: 14px; }
.tags span { display: flex; align-items: center; gap: 7px; }
.dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }

/* ---------- Cards grid ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 20px; }
.card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform .18s, border-color .18s;
}
.card:hover { transform: translateY(-4px); border-color: var(--border-strong); }
.card .banner {
  height: 150px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 17px;
  text-align: center;
  padding: 0 18px;
}
.g1 { background: linear-gradient(135deg, #f59e0b, #ef4444); }
.g2 { background: linear-gradient(135deg, #10b981, #06b6d4); }
.g3 { background: linear-gradient(135deg, #f59e0b, #a855f7); }
.card .body { padding: 18px; }
.card .body h3 { font-size: 16px; margin-bottom: 14px; }
.card .meta { display: flex; gap: 10px; }
.chip {
  background: var(--panel-2);
  border: 1px solid var(--border);
  color: var(--muted);
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 7px;
}
.buy-btn {
  margin-top: 16px;
  width: 100%;
  padding: 10px;
  border: none;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #1a1206;
  font-weight: 700;
  cursor: pointer;
  font-size: 14px;
}
.buy-btn:active { transform: scale(.98); }

/* ---------- My Access ---------- */
.access-head { display: flex; align-items: flex-start; justify-content: space-between; margin-bottom: 26px; }
.access-head h1 { font-size: 34px; }
.access-head p { color: var(--muted); margin-top: 6px; }
.count-pill { background: var(--panel-2); border: 1px solid var(--border); padding: 7px 14px; border-radius: 999px; font-size: 13px; color: var(--muted); }

.token-list { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; padding: 10px; }
.token {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 18px;
  border-radius: 12px;
}
.token + .token { border-top: 1px solid var(--border); border-radius: 0; }
.ring {
  width: 44px; height: 44px; border-radius: 50%;
  display: grid; place-items: center; flex: 0 0 auto;
  font-size: 11px; font-weight: 700; color: var(--text);
  background:
    conic-gradient(var(--accent) var(--pct, 66%), rgba(255,255,255,0.10) 0);
  position: relative;
}
.ring::after {
  content: ""; position: absolute; inset: 4px; border-radius: 50%; background: var(--panel);
}
.ring span { position: relative; z-index: 1; }
.ring.exhausted { background: conic-gradient(var(--muted-2) 100%, rgba(255,255,255,0.1) 0); }
.token .info { flex: 1; min-width: 0; }
.token .info h4 { font-size: 15px; }
.token .info .tok { font-family: var(--mono); font-size: 12px; color: var(--accent); margin-top: 4px; display: flex; align-items: center; gap: 8px; }
.copy-mini { background: none; border: none; color: var(--muted); cursor: pointer; font-size: 12px; }
.copy-mini:hover { color: var(--text); }
.token .status { display: flex; align-items: center; gap: 10px; }
.badge { font-size: 12px; padding: 4px 10px; border-radius: 999px; font-weight: 600; }
.badge.active { background: rgba(34,197,94,0.15); color: #4ade80; }
.badge.exhausted { background: rgba(139,151,172,0.15); color: var(--muted); }
.time { font-size: 12px; color: var(--accent-2); display: flex; align-items: center; gap: 5px; }
.time.warn { color: var(--red); }
.tbtn { border: 1px solid var(--border-strong); background: var(--panel-2); color: var(--text); padding: 7px 12px; border-radius: 8px; font-size: 12px; cursor: pointer; }
.tbtn.dl { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #1a1206; border: none; font-weight: 700; }
.tbtn.revoke { color: #f87171; border-color: rgba(239,68,68,0.4); }
.tbtn:disabled { opacity: .4; cursor: not-allowed; }

/* ---------- Architecture ---------- */
.diagram { background: var(--panel); border: 1px solid var(--border); border-radius: 18px; padding: 40px 30px; margin-top: 30px; position: relative; }
.wires { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; z-index: 1; overflow: visible; }
.wires path { fill: none; stroke-width: 2; stroke-dasharray: 6 5; animation: dash 1s linear infinite; }
@keyframes dash { to { stroke-dashoffset: -22; } }
.wires .flow-label { font-size: 10.5px; fill: var(--muted); font-family: -apple-system, sans-serif; }
.layer { position: relative; z-index: 2; display: flex; align-items: center; gap: 28px; margin: 34px 0; }
.layer-label { width: 90px; flex: 0 0 90px; font-size: 12px; letter-spacing: 0.12em; color: var(--muted-2); font-weight: 700; }
.nodes { display: flex; gap: 40px; flex-wrap: wrap; }
.node {
  background: var(--panel-2);
  border: 1.5px solid var(--accent-2);
  border-radius: 12px;
  padding: 14px 18px;
  min-width: 150px;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
}
.node:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(249,115,22,0.25); }
.node.kv { border-color: var(--green); }
.node.r2 { border-color: var(--blue); }
.node .n-title { font-weight: 700; font-size: 14px; display: flex; align-items: center; gap: 7px; }
.node .n-sub { color: var(--muted); font-size: 12px; margin-top: 4px; }
.legend { display: flex; gap: 22px; margin-top: 20px; flex-wrap: wrap; }
.legend span { display: flex; align-items: center; gap: 7px; font-size: 12px; color: var(--muted); }
.lg-line { width: 18px; height: 3px; border-radius: 2px; }

/* ---------- Sub tabs ---------- */
.subtabs { display: flex; justify-content: center; gap: 10px; margin: 26px 0 24px; }
.subtab {
  padding: 9px 18px; border-radius: 999px; border: 1px solid var(--border-strong);
  background: transparent; color: var(--muted); cursor: pointer; font-size: 14px; font-weight: 600;
}
.subtab.active { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #1a1206; border-color: transparent; }
.subview { display: none; } .subview.active { display: block; }

/* ---------- ER diagram ---------- */
.er-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.er-table { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; }
.er-table .th { background: linear-gradient(135deg, rgba(245,158,11,0.18), rgba(249,115,22,0.10)); color: var(--accent); font-family: var(--mono); font-weight: 700; padding: 12px 16px; font-size: 14px; border-bottom: 1px solid var(--border); }
.er-row { display: flex; align-items: center; gap: 8px; padding: 9px 16px; font-family: var(--mono); font-size: 12.5px; }
.er-row + .er-row { border-top: 1px solid var(--border); }
.er-row .fname { flex: 1; color: var(--text); }
.er-row .ftype { color: var(--muted); }
.tag { font-size: 10px; padding: 2px 7px; border-radius: 5px; font-weight: 700; font-family: -apple-system, sans-serif; }
.t-pk { background: rgba(168,85,247,0.2); color: #c084fc; }
.t-int { background: rgba(59,130,246,0.18); color: #60a5fa; }
.t-null { background: rgba(239,68,68,0.16); color: #f87171; }
.t-uniq { background: rgba(34,197,94,0.16); color: #4ade80; }
.t-def { background: rgba(245,158,11,0.16); color: var(--accent); }
.t-idx { background: rgba(6,182,212,0.16); color: #22d3ee; }

/* ---------- Code editor ---------- */
.editor { background: #0a0f1c; border: 1px solid var(--border); border-radius: 14px; overflow: hidden; margin-top: 4px; }
.file-tabs { display: flex; gap: 2px; background: #0d1425; border-bottom: 1px solid var(--border); overflow-x: auto; }
.file-tab {
  padding: 11px 16px; font-family: var(--mono); font-size: 12.5px; color: var(--muted);
  border: none; background: transparent; cursor: pointer; white-space: nowrap; border-bottom: 2px solid transparent;
}
.file-tab:hover { color: var(--text); }
.file-tab.active { color: var(--accent); border-bottom-color: var(--accent); background: #0a0f1c; }
.code-wrap { position: relative; }
.copy-btn {
  position: absolute; top: 12px; right: 12px; z-index: 2;
  background: #1e2536; border: 1px solid var(--border-strong); color: var(--muted);
  padding: 6px 12px; border-radius: 7px; font-size: 12px; cursor: pointer; display: flex; align-items: center; gap: 6px;
}
.copy-btn:hover { color: var(--text); }
pre { margin: 0; padding: 18px 18px 22px; overflow-x: auto; max-height: 520px; }
code { font-family: var(--mono); font-size: 13px; line-height: 1.65; color: #cbd5e1; white-space: pre; }
.k { color: #f472b6; }   /* keyword */
.s { color: #fbbf24; }   /* string */
.c { color: #64748b; font-style: italic; } /* comment */
.f { color: #60a5fa; }   /* function */
.n { color: #a78bfa; }   /* number */
.codefile { display: none; } .codefile.active { display: block; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); padding: 22px 40px; display: flex; justify-content: space-between; color: var(--muted-2); font-size: 13px; }

/* ---------- Modal ---------- */
.modal-back { position: fixed; inset: 0; background: rgba(3,7,18,0.7); backdrop-filter: blur(4px); display: none; place-items: center; z-index: 100; }
.modal-back.show { display: grid; }
.modal { background: var(--panel); border: 1px solid var(--border-strong); border-radius: 16px; padding: 28px; max-width: 460px; width: 90%; animation: pop .2s ease; }
@keyframes pop { from { transform: scale(.94); opacity: 0; } to { transform: none; opacity: 1; } }
.modal h3 { font-size: 20px; margin-bottom: 8px; display: flex; align-items: center; gap: 10px; }
.modal p { color: var(--muted); line-height: 1.6; font-size: 14px; }
.modal .close { margin-top: 20px; width: 100%; padding: 10px; border-radius: 9px; border: none; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #1a1206; font-weight: 700; cursor: pointer; }

/* ---------- Toast ---------- */
.toast { position: fixed; bottom: 26px; left: 50%; transform: translateX(-50%) translateY(20px); background: #1e2536; border: 1px solid var(--border-strong); color: var(--text); padding: 12px 20px; border-radius: 10px; font-size: 14px; opacity: 0; pointer-events: none; transition: .25s; z-index: 200; }
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

@media (max-width: 860px) {
  .header { padding: 14px 18px; flex-wrap: wrap; gap: 10px; }
  .nav { order: 3; width: 100%; overflow-x: auto; }
  .page { padding: 30px 18px 60px; }
  .cards, .er-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 36px; }
  .layer { flex-direction: column; align-items: flex-start; }
  .token { flex-wrap: wrap; }
}