/* SourceRadar — curated China bestseller radar for Western buyers */
:root {
  --bg: #0e1116;
  --bg-soft: #151a22;
  --card: #1b222d;
  --card-hover: #202938;
  --line: #2a3441;
  --text: #e8edf4;
  --text-dim: #93a1b5;
  --accent: #ff5a3c;
  --accent-soft: rgba(255, 90, 60, 0.12);
  --gold: #f5b942;
  --green: #3ecf8e;
  --amber: #f5b942;
  --red: #ff6b6b;
  --radius: 14px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  font-size: 16px;
}

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

body {
  font-family: "Inter", "Segoe UI", -apple-system, "PingFang SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
section, main { scroll-margin-top: 76px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(14, 17, 22, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--text); font-weight: 800; font-size: 1.25rem; }
.brand-text em { color: var(--accent); font-style: normal; }
.main-nav { display: flex; gap: 28px; }
.main-nav a { color: var(--text-dim); text-decoration: none; font-size: 0.95rem; font-weight: 500; }
.main-nav a:hover { color: var(--text); }

/* Hero */
.hero { padding: 88px 0 56px; background: radial-gradient(1200px 500px at 70% -10%, rgba(255, 90, 60, 0.14), transparent 60%); }
.hero-kicker { color: var(--gold); font-size: 0.85rem; letter-spacing: 0.08em; text-transform: uppercase; font-weight: 700; margin-bottom: 16px; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.4rem); line-height: 1.12; font-weight: 800; letter-spacing: -0.02em; }
.hero .accent { color: var(--accent); }
.hero-sub { max-width: 640px; margin-top: 20px; color: var(--text-dim); font-size: 1.1rem; }
.hero-sub strong { color: var(--text); }
.hero-stats { display: flex; flex-wrap: wrap; gap: 40px; margin-top: 40px; }
.stat { display: flex; flex-direction: column; }
.stat-num { font-size: 1.6rem; font-weight: 800; color: var(--text); }
.stat-label { color: var(--text-dim); font-size: 0.85rem; }

/* Difference section */
.difference { padding: 56px 0; background: var(--bg-soft); border-block: 1px solid var(--line); }
.section-title { font-size: 1.7rem; font-weight: 800; letter-spacing: -0.01em; margin-bottom: 28px; }
.diff-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 18px; }
.diff-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.diff-icon { font-size: 1.6rem; margin-bottom: 10px; }
.diff-card h3 { font-size: 1.05rem; margin-bottom: 8px; }
.diff-card p { color: var(--text-dim); font-size: 0.92rem; }

/* Picks */
.picks { padding: 64px 0; }
.picks-sub { color: var(--text-dim); margin-top: -18px; margin-bottom: 26px; }

.controls { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 18px; }
.search {
  flex: 1 1 260px; padding: 12px 16px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--text); font-size: 0.95rem;
}
.search::placeholder { color: var(--text-dim); }
.sort {
  padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); color: var(--text); font-size: 0.95rem;
}
.lowsat-toggle { display: flex; align-items: center; gap: 8px; color: var(--text-dim); font-size: 0.9rem; cursor: pointer; user-select: none; }
.lowsat-toggle input { accent-color: var(--accent); width: 16px; height: 16px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 28px; }
.chip {
  padding: 7px 14px; border-radius: 999px; border: 1px solid var(--line);
  background: transparent; color: var(--text-dim); font-size: 0.85rem; cursor: pointer;
  transition: all 0.15s ease;
}
.chip:hover { color: var(--text); border-color: var(--text-dim); }
.chip.active { background: var(--accent); border-color: var(--accent); color: #fff; font-weight: 600; }

/* Grid & cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 20px; cursor: pointer; transition: transform 0.15s ease, background 0.15s ease, border-color 0.15s ease;
  display: flex; flex-direction: column; gap: 12px;
}
.card:hover { transform: translateY(-3px); background: var(--card-hover); border-color: #3a4757; }

.card-top { display: flex; align-items: flex-start; gap: 14px; }
.card-emoji {
  font-size: 1.9rem; width: 56px; height: 56px; flex: none;
  display: grid; place-items: center; border-radius: 12px;
  background: linear-gradient(135deg, var(--accent-soft), rgba(245, 185, 66, 0.10));
  border: 1px solid var(--line);
}
.card-title { font-size: 1.02rem; font-weight: 700; line-height: 1.3; }
.card-track { color: var(--text-dim); font-size: 0.8rem; margin-top: 2px; }

.trend-row { display: flex; align-items: center; gap: 10px; }
.trend-bar { flex: 1; height: 6px; border-radius: 3px; background: var(--line); overflow: hidden; }
.trend-fill { height: 100%; border-radius: 3px; background: linear-gradient(90deg, var(--gold), var(--accent)); }
.trend-num { font-size: 0.82rem; font-weight: 700; color: var(--gold); white-space: nowrap; }

.card-prices { display: flex; gap: 18px; font-size: 0.88rem; }
.price-block { display: flex; flex-direction: column; }
.price-label { color: var(--text-dim); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; }
.price-value { font-weight: 700; }
.margin-value { color: var(--green); font-weight: 700; }

.card-badges { display: flex; flex-wrap: wrap; gap: 6px; margin-top: auto; }
.badge {
  font-size: 0.72rem; padding: 3px 9px; border-radius: 999px;
  background: var(--bg-soft); border: 1px solid var(--line); color: var(--text-dim);
}
.badge.sat-low { color: var(--green); border-color: rgba(62, 207, 142, 0.4); }
.badge.sat-medium { color: var(--amber); border-color: rgba(245, 185, 66, 0.4); }
.badge.sat-high { color: var(--red); border-color: rgba(255, 107, 107, 0.4); }

.empty { text-align: center; color: var(--text-dim); padding: 48px 0; }

/* Playbook */
.playbook { padding: 56px 0; background: var(--bg-soft); border-block: 1px solid var(--line); }
.playbook-list { max-width: 780px; padding-left: 22px; display: flex; flex-direction: column; gap: 14px; color: var(--text-dim); }
.playbook-list strong { color: var(--text); }

/* Footer */
.site-footer { padding: 36px 0; }
.footer-inner { display: flex; flex-direction: column; gap: 8px; }
.footer-note { color: var(--text-dim); font-size: 0.82rem; max-width: 720px; }

/* Modal */
.modal-backdrop[hidden] { display: none; }
.modal-backdrop {
  position: fixed; inset: 0; z-index: 100;
  background: rgba(8, 10, 14, 0.7); backdrop-filter: blur(4px);
  display: grid; place-items: center; padding: 20px;
}
.modal {
  position: relative; width: min(680px, 100%); max-height: 88vh; overflow-y: auto;
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: 18px;
  padding: 30px; box-shadow: var(--shadow);
}
.modal-close {
  position: absolute; top: 14px; right: 14px; width: 34px; height: 34px;
  border-radius: 50%; border: 1px solid var(--line); background: var(--card);
  color: var(--text-dim); cursor: pointer; font-size: 0.9rem;
}
.modal-close:hover { color: var(--text); }

.modal-head { display: flex; gap: 16px; align-items: center; margin-bottom: 18px; }
.modal-emoji {
  font-size: 2.4rem; width: 72px; height: 72px; flex: none; display: grid; place-items: center;
  border-radius: 16px; background: linear-gradient(135deg, var(--accent-soft), rgba(245, 185, 66, 0.10));
  border: 1px solid var(--line);
}
.modal-title { font-size: 1.35rem; font-weight: 800; line-height: 1.25; }
.modal-track { color: var(--text-dim); font-size: 0.88rem; }

.modal-section { margin-top: 18px; }
.modal-section h4 {
  font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.07em;
  color: var(--gold); margin-bottom: 8px;
}
.modal-section p { color: var(--text-dim); font-size: 0.95rem; }
.modal-section p strong { color: var(--text); }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; }
.fact { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 12px; }
.fact-label { color: var(--text-dim); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; }
.fact-value { font-weight: 700; font-size: 0.95rem; margin-top: 2px; }

.taglist { display: flex; flex-wrap: wrap; gap: 6px; }

/* Margin calculator */
.calc { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; }
.calc-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; margin-bottom: 14px; }
.calc-field label { display: block; font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 4px; }
.calc-field input {
  width: 100%; padding: 9px 10px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--bg); color: var(--text); font-size: 0.92rem;
}
.calc-results { display: flex; flex-wrap: wrap; gap: 20px; border-top: 1px dashed var(--line); padding-top: 12px; }
.calc-result { display: flex; flex-direction: column; }
.calc-result .r-label { font-size: 0.72rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.05em; }
.calc-result .r-value { font-weight: 800; font-size: 1.1rem; }
.calc-result .r-value.good { color: var(--green); }
.calc-result .r-value.bad { color: var(--red); }
.calc-note { margin-top: 10px; font-size: 0.75rem; color: var(--text-dim); }

/* Policy strip */
.policy-strip { background: rgba(245, 185, 66, 0.08); border-block: 1px solid rgba(245, 185, 66, 0.25); padding: 10px 0; }
.policy-inner { display: flex; flex-wrap: wrap; gap: 8px 28px; }
.policy-item { color: var(--text-dim); font-size: 0.82rem; }
.policy-item strong { color: var(--gold); }

/* Tier badges */
.badge.tier-profit { color: var(--green); border-color: rgba(62, 207, 142, 0.4); }
.badge.tier-traffic { color: #6db2ff; border-color: rgba(109, 178, 255, 0.4); }
.badge.tier-identity { color: #d6a2ff; border-color: rgba(214, 162, 255, 0.4); }

/* Lifecycle badges */
.badge.lc-early { color: var(--green); border-color: rgba(62, 207, 142, 0.5); background: rgba(62, 207, 142, 0.08); }
.badge.lc-growth { color: var(--gold); border-color: rgba(245, 185, 66, 0.5); background: rgba(245, 185, 66, 0.08); }
.badge.lc-saturated { color: var(--red); border-color: rgba(255, 107, 107, 0.5); background: rgba(255, 107, 107, 0.08); }

/* Price tier accents */
.price-value.tier1688, .fact-value.tier1688 { color: var(--green); }
.price-value.retail, .fact-value.retail { color: var(--gold); }
.card-prices { flex-wrap: wrap; gap: 12px 16px; }

/* 1688 keyword + copy */
.cn-keyword { margin-top: 8px; }
.cn-keyword code {
  background: var(--card); border: 1px solid var(--line); border-radius: 6px;
  padding: 3px 8px; color: var(--gold); font-size: 0.9rem;
}
.copy-btn {
  margin-left: 8px; padding: 4px 12px; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--text-dim); font-size: 0.78rem;
}
.copy-btn:hover { color: var(--text); border-color: var(--text-dim); }

/* Live trends */
.trends-status { color: var(--text-dim); font-size: 0.8rem; margin: -14px 0 20px; }
.badge.mo-rising { color: var(--green); border-color: rgba(62, 207, 142, 0.5); background: rgba(62, 207, 142, 0.08); }
.badge.mo-stable { color: var(--text-dim); }
.badge.mo-cooling { color: var(--red); border-color: rgba(255, 107, 107, 0.5); background: rgba(255, 107, 107, 0.08); }
.spark-row { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
.spark-row.mo-rising .spark { color: var(--green); }
.spark-row.mo-stable .spark { color: var(--text-dim); }
.spark-row.mo-cooling .spark { color: var(--red); }
.spark { max-width: 100%; }
.spark-meta { display: flex; flex-direction: column; gap: 6px; }
.spark-note { color: var(--text-dim); font-size: 0.8rem; }
.ext-link { color: var(--gold); text-decoration: none; }
.ext-link:hover { text-decoration: underline; }

/* Pricing */
.pricing { padding: 56px 0; }
.price-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; margin-top: 24px; }
.price-card {
  position: relative; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 24px; display: flex; flex-direction: column; gap: 12px;
}
.price-card.featured { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent), var(--shadow); }
.price-flag {
  position: absolute; top: -11px; left: 20px; background: var(--accent); color: #fff;
  font-size: 0.7rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase;
  padding: 3px 10px; border-radius: 999px;
}
.price-card h3 { font-size: 1.1rem; }
.price-tag { font-size: 2rem; font-weight: 800; color: var(--gold); }
.price-tag span { font-size: 0.9rem; font-weight: 500; color: var(--text-dim); }
.price-card ul { padding-left: 18px; display: flex; flex-direction: column; gap: 6px; color: var(--text-dim); font-size: 0.9rem; }
.price-note { margin-top: auto; color: var(--text-dim); font-size: 0.8rem; border-top: 1px dashed var(--line); padding-top: 10px; }

@media (max-width: 640px) {
  .main-nav { display: none; }
  .hero { padding: 56px 0 40px; }
  .hero-stats { gap: 24px; }
  .policy-inner { flex-direction: column; gap: 6px; }
}