/* PainRadar 全局样式（首页 / 结果页 / 详情页共用）— 浅色主题 */
:root {
  --bg: #f6f7fb;
  --card: #ffffff;
  --card-2: #f9fafb;
  --border: #e5e7eb;
  --text: #1f2937;
  --muted: #6b7280;
  --indigo: #6366f1;
  --purple: #a855f7;
  --pink: #ec4899;
  --error: #dc2626;
  --ok: #059669;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(99, 102, 241, 0.1), transparent 60%),
              radial-gradient(900px 500px at 10% 110%, rgba(168, 85, 247, 0.08), transparent 60%),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.6;
  font-size: 16px;
}
a { color: var(--indigo); }

/* 导航（results / details / index 共用） */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 32px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.2px;
  text-decoration: none;
  background: linear-gradient(90deg, var(--indigo), var(--purple));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand svg { width: 26px; height: 26px; flex: none; }
.nav-links { display: flex; align-items: center; gap: 16px; }
.nav-plan {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(107, 114, 128, 0.12);
  color: var(--muted);
  border: 1px solid var(--border);
}
.nav-plan.paid {
  background: linear-gradient(90deg, var(--indigo), var(--purple));
  color: #fff;
  border: none;
}
.nav-expiry { color: var(--muted); font-size: 14px; }
.nav-upgrade {
  background: linear-gradient(90deg, var(--indigo), var(--purple));
  color: #fff;
  text-decoration: none;
  border-radius: 8px;
  padding: 7px 14px;
  font-size: 14px;
  font-weight: 600;
}
.nav-upgrade:hover { filter: brightness(1.08); }
.nav-demo {
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(217, 119, 6, 0.12);
  color: #b45309;
  border: 1px solid rgba(217, 119, 6, 0.35);
}
.nav-pass {
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: rgba(5, 150, 105, 0.12);
  color: #059669;
  border: 1px solid rgba(5, 150, 105, 0.35);
}
.back-btn {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.15s;
}
.back-btn:hover { color: var(--text); }

/* 布局 */
.wrap { max-width: 960px; margin: 0 auto; padding: 24px 32px 64px; }

/* 通用按钮 / 提示 / 空态 */
.btn-grad {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 10px;
  background: linear-gradient(90deg, var(--indigo), var(--purple));
  color: #fff;
  font-weight: 600;
  text-decoration: none;
  font-size: 15px;
  transition: filter 0.15s;
}
.btn-grad:hover { filter: brightness(1.08); }
.error {
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  margin: 0 0 14px;
  background: rgba(220, 38, 38, 0.07);
  border: 1px solid rgba(220, 38, 38, 0.35);
  color: var(--error);
}
.empty { text-align: center; padding: 60px 0; color: var(--muted); }
.empty .big { font-size: 42px; }
.empty.small { padding: 24px 0; font-size: 14px; }
.try-again { text-align: center; margin-top: 36px; }

/* 证据帖子链接（results / details 共用） */
.post-chips { display: flex; flex-direction: column; gap: 8px; margin-top: 14px; }
.evidence { margin-top: 14px; }
.evidence-label { font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 8px; letter-spacing: 0.2px; }
.post-chip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card-2);
  text-decoration: none;
  transition: border-color 0.15s;
}
.post-chip:hover { border-color: var(--indigo); }
.chip-title { color: var(--text); font-size: 15px; flex: 1; }
.chip-src { color: var(--muted); font-size: 13px; flex: none; }

/* 平台徽章（Reddit / Hacker News / Google News） */
.src-badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  flex: none;
  line-height: 1.6;
}
.src-badge.reddit { background: #ff4500; }
.src-badge.hn { background: #ff6600; }
.src-badge.news { background: #4285f4; }

/* 付费信号徽章 */
.pay-signal { font-weight: 600; }
.pay-signal.high { color: var(--ok); }
.pay-signal.medium { color: #d97706; }
.pay-signal.low { color: var(--muted); }
.pill { padding: 2px 10px; border-radius: 999px; font-size: 12px; }
.pill.high { background: rgba(5, 150, 105, 0.12); color: var(--ok); }
.pill.medium { background: rgba(217, 119, 6, 0.12); color: #d97706; }
.pill.low { background: rgba(107, 114, 128, 0.12); color: var(--muted); }

/* 滚动渐显（首页样例区） */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 640px) {
  .nav { padding: 14px 18px; flex-wrap: wrap; }
  .wrap { padding: 16px 18px 48px; }
  .nav-links { gap: 12px; }
}