/* AmzMetric design system - Data-Dense Dashboard (MASTER.md derived)
   Dark navy base / blue primary / amber accent / mono numerals */
:root {
  --bg: #0b1526;
  --bg-soft: #101d33;
  --card: #14233d;
  --card-hover: #182a48;
  --border: #22375c;
  --fg: #e6edf7;
  --fg-muted: #8ba3c7;
  --primary: #3b82f6;
  --primary-deep: #1e40af;
  --accent: #f59e0b;
  --accent-ink: #10192e;
  --ok: #34d399;
  --warn: #fbbf24;
  --danger: #f87171;
  --mono: "Fira Code", ui-monospace, "Cascadia Code", Consolas, monospace;
  --sans: "Fira Sans", -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --radius: 10px;
  --shadow: 0 10px 30px rgba(2, 8, 20, .45);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font-family: var(--sans); font-size: 15px; line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: ""; position: fixed; inset: 0; z-index: -1; pointer-events: none;
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(59, 130, 246, .14), transparent 60%),
    radial-gradient(700px 380px at -10% 20%, rgba(245, 158, 11, .07), transparent 55%);
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono { font-family: var(--mono); letter-spacing: .02em; }
.muted { color: var(--fg-muted); }
.center { text-align: center; }
h1, h2, h3 { line-height: 1.25; margin: 0 0 .5em; }
h1 { font-size: clamp(1.6rem, 3.2vw, 2.4rem); }
h3 { font-size: 1.05rem; }

/* nav */
.nav {
  display: flex; align-items: center; gap: 22px;
  padding: 12px 28px; position: sticky; top: 0; z-index: 50;
  background: rgba(11, 21, 38, .82); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 9px; font-size: 1.12rem; color: var(--fg); }
.brand:hover { text-decoration: none; }
.brand-mark { width: 30px; height: 30px; }
.brand-name b { color: var(--primary); }
.nav-links { display: flex; gap: 18px; margin-left: 8px; }
.nav-links a { color: var(--fg-muted); padding: 6px 2px; }
.nav-links a:hover { color: var(--fg); text-decoration: none; }
.nav-actions { margin-left: auto; display: flex; gap: 10px; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--border); border-radius: 8px; cursor: pointer;
  padding: 9px 18px; font: inherit; font-weight: 600;
  color: var(--fg); background: var(--bg-soft);
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); background: var(--card-hover); }
.btn.accent { background: linear-gradient(135deg, #f59e0b, #fbbf24); color: var(--accent-ink); border-color: transparent; }
.btn.accent:hover { box-shadow: 0 8px 22px rgba(245, 158, 11, .35); }
.btn.ghost { background: transparent; }
.btn.sm { padding: 6px 13px; font-size: .88rem; }
.btn.xs { padding: 3px 9px; font-size: .78rem; }
.btn.lg { padding: 12px 26px; font-size: 1.02rem; }
.btn.wide { width: 100%; }

/* hero */
.hero { padding: 64px 32px 30px; max-width: 1560px; margin: 0 auto; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 44px; align-items: center; }
.pill {
  display: inline-block; padding: 4px 13px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--bg-soft);
  color: var(--primary); font-size: .84rem; font-weight: 600; margin-bottom: 14px;
}
.lead { color: var(--fg-muted); max-width: 56ch; }
.hero-cta { display: flex; gap: 14px; margin: 22px 0 26px; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 34px; }
.hero-stats b { display: block; font-family: var(--mono); font-size: 1.6rem; color: var(--fg); }
.hero-stats span { color: var(--fg-muted); font-size: .85rem; }
.hero-panel {
  border: 1px solid var(--border); border-radius: var(--radius);
  background: linear-gradient(160deg, var(--card), var(--bg-soft));
  box-shadow: var(--shadow); padding: 18px;
}
.panel-head { display: flex; gap: 8px; align-items: center; color: var(--fg-muted); font-size: .85rem; margin-bottom: 10px; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--ok); box-shadow: 0 0 10px var(--ok); }
.spark svg { width: 100%; height: auto; display: block; }
.kpi-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 12px; }
.kpi { background: var(--bg-soft); border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; }
.kpi span { display: block; color: var(--fg-muted); font-size: .74rem; }
.kpi b { font-family: var(--mono); font-size: 1.05rem; }
.kpi.up b { color: var(--ok); }

/* sections & cards */
.section { max-width: 1560px; margin: 0 auto; padding: 46px 32px; }
.section.narrow { max-width: 860px; }
.section-title { font-size: 1.5rem; margin-bottom: 22px; }
.card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px;
}
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.pcard {
  display: flex; flex-direction: column; gap: 10px; color: var(--fg);
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 13px; transition: transform .18s ease, border-color .18s ease, background .18s ease;
}
.pcard:hover { text-decoration: none; transform: translateY(-3px); border-color: var(--primary); background: var(--card-hover); }
.pcard img { width: 100%; height: 130px; object-fit: contain; border-radius: 6px; background: var(--bg-soft); }
.pcard-title { margin: 0; font-size: .86rem; color: var(--fg); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pcard-meta { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; font-size: .82rem; color: var(--fg-muted); }
.asin { color: var(--primary); font-size: .78rem; }
.star { color: var(--warn); }
.badge {
  display: inline-block; padding: 2px 9px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--border); font-size: .74rem;
  color: var(--fg-muted);
}
.badge.ok { color: var(--ok); border-color: var(--ok); }
.badge.warn, .stat.warn b { color: var(--warn); border-color: var(--warn); }

.feature-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.feature {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; transition: border-color .2s ease, transform .18s ease;
}
.feature:hover { border-color: var(--primary); transform: translateY(-2px); }
.feature h3 { color: var(--fg); }
.feature p { color: var(--fg-muted); margin: 0; font-size: .9rem; }
.chips { display: flex; flex-wrap: wrap; gap: 9px; }
.chip {
  padding: 5px 13px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--bg-soft); font-size: .85rem; cursor: pointer;
  transition: border-color .15s ease, color .15s ease;
}
.chip:hover { border-color: var(--primary); color: var(--primary); }

/* pricing */
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 18px; max-width: 980px; margin: 0 auto; }
.price-card { position: relative; text-align: center; padding: 28px 22px; }
.price-card ul { list-style: none; padding: 0; margin: 18px 0; text-align: left; }
.price-card li { padding: 7px 0; border-bottom: 1px dashed var(--border); color: var(--fg-muted); font-size: .92rem; }
.price-card li::before { content: "✓ "; color: var(--ok); }
.price b { font-size: 2rem; font-family: var(--mono); }
.price-card.hot { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.ribbon {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #f59e0b, #fbbf24); color: var(--accent-ink);
  font-size: .76rem; font-weight: 700; padding: 3px 14px; border-radius: 999px;
}

/* faq / prose */
.faq details { border: 1px solid var(--border); border-radius: 8px; background: var(--card); padding: 14px 18px; margin-bottom: 12px; }
.faq summary { cursor: pointer; font-weight: 600; }
.prose h3 { margin-top: 1.4em; color: var(--fg); }

/* auth */
.auth-wrap { min-height: 68vh; display: grid; place-items: center; padding: 28px; }
.auth { width: min(420px, 94vw); padding: 30px; }
.auth h1 { text-align: center; }
.auth label { display: block; margin: 14px 0; font-size: .9rem; color: var(--fg-muted); }
.auth input:not([type=hidden]) {
  width: 100%; margin-top: 6px; padding: 10px 13px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--fg);
  font: inherit;
}
.auth input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.alert { background: rgba(248, 113, 113, .12); border: 1px solid var(--danger); color: #fecaca; padding: 9px 13px; border-radius: 8px; font-size: .88rem; }

/* app shell */
.app-shell { display: grid; grid-template-columns: 216px 1fr; gap: 26px; max-width: 1720px; margin: 0 auto; padding: 26px 28px; min-height: 74vh; }
.sidebar { display: flex; flex-direction: column; gap: 6px; position: sticky; top: 76px; align-self: start; }
.sidebar a { color: var(--fg-muted); padding: 9px 13px; border-radius: 8px; }
.sidebar a:hover { text-decoration: none; background: var(--bg-soft); color: var(--fg); }
.sidebar a.on { background: var(--bg-soft); color: var(--fg); border-left: 3px solid var(--primary); }
.side-foot { margin-top: 18px; padding: 10px 12px; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 6px; font-size: .8rem; }
.app-main { min-width: 0; }
.search-bar { display: flex; gap: 10px; margin: 16px 0; }
.search-bar input, .search-bar select {
  flex: 1; padding: 11px 14px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-soft); color: var(--fg); font: inherit;
}
.search-bar input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.filter-row { margin-bottom: 14px; }
.track-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 14px; }
.track-head { display: flex; justify-content: space-between; align-items: center; }
.spark.sm svg { height: 48px; }
.xs-t { font-size: .78rem; }
.empty p { color: var(--fg-muted); }

/* stats & tables */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: 12px 14px; }
.stat span { color: var(--fg-muted); font-size: .8rem; }
.stat b { font-family: var(--mono); font-size: 1.3rem; display: block; }
.table { width: 100%; border-collapse: collapse; font-size: .88rem; }
.table th { text-align: left; color: var(--fg-muted); font-weight: 600; padding: 8px 10px; border-bottom: 1px solid var(--border); }
.table td { padding: 8px 10px; border-bottom: 1px solid rgba(34, 55, 92, .5); }
.table tr:hover td { background: rgba(59, 130, 246, .05); }
.table select, .table .btn { margin: 0; }

/* tools */
.tool-tabs { display: flex; gap: 8px; margin: 16px 0; }
.tab { border: 1px solid var(--border); background: var(--bg-soft); color: var(--fg-muted); border-radius: 8px; padding: 8px 16px; cursor: pointer; font: inherit; }
.tab.on { color: var(--fg); border-color: var(--primary); background: var(--card); }
.tool-pane { display: none; }
.tool-pane.on { display: block; }
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px; margin-bottom: 14px; }
.form-grid label { display: block; color: var(--fg-muted); font-size: .86rem; }
.form-grid input, .form-grid select, .tool-pane textarea {
  width: 100%; margin-top: 6px; padding: 9px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-soft); color: var(--fg); font: inherit;
}
.result { margin-top: 16px; padding: 14px; border-radius: 8px; background: var(--bg-soft); border: 1px solid var(--border); }
.result .big { font-family: var(--mono); font-size: 1.7rem; }
.risk-word { color: var(--danger); font-weight: 700; }
.risk-sus { color: var(--warn); }

.filter-row { margin-bottom: 14px; }
.filter-row input, .filter-row select {
  padding: 8px 11px; border-radius: 8px; border: 1px solid var(--border);
  background: var(--bg-soft); color: var(--fg); font: inherit; font-size: .88rem;
}

/* reviews */
.hbar { display: grid; grid-template-columns: 46px 1fr 60px; gap: 10px; align-items: center; margin: 7px 0; font-size: .86rem; }
.hbar-track { background: var(--bg-soft); border-radius: 6px; height: 14px; overflow: hidden; }
.hbar-fill { height: 100%; background: linear-gradient(90deg, #3b82f6, #60a5fa); border-radius: 6px; }
.hbar-fill.warn { background: linear-gradient(90deg, #f59e0b, #fbbf24); }
.hbar-fill.ok { background: linear-gradient(90deg, #10b981, #34d399); }
.rev { border-bottom: 1px dashed var(--border); padding: 10px 0; }
.rev p { margin: 5px 0 0; color: var(--fg-muted); font-size: .88rem; }
.notif { border-bottom: 1px dashed var(--border); padding: 10px 0; }
.notif.unread b { color: var(--accent); }
.scorecard { margin-top: 16px; padding: 14px; border-radius: 8px; background: var(--bg-soft); border: 1px solid var(--border); }

/* footer */
.footer { border-top: 1px solid var(--border); margin-top: 40px; padding: 36px 28px 26px; background: var(--bg-soft); }
.foot-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 24px; max-width: 1560px; margin: 0 auto; }
.foot-grid h4 { margin: 0 0 10px; color: var(--fg); font-size: .92rem; }
.foot-grid a { display: block; color: var(--fg-muted); padding: 3px 0; font-size: .9rem; }
.foot-brand { font-size: 1.15rem; margin-bottom: 6px; }
.foot-brand b { color: var(--primary); }
.copyright { text-align: center; color: var(--fg-muted); font-size: .8rem; margin-top: 26px; }

/* responsive */
@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; }
  .app-shell { grid-template-columns: 1fr; }
  .sidebar { position: static; flex-direction: row; flex-wrap: wrap; }
  .sidebar a { padding: 7px 11px; }
  .side-foot { display: none; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .nav { padding: 10px 16px; gap: 12px; }
  .nav-links { display: none; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; scroll-behavior: auto !important; }
}
@media print { .nav, .sidebar, .footer { display: none; } }