/* ============================================
   FGI Web Frontend — Main Stylesheet
   ============================================ */

:root {
  --extreme-fear: #d32f2f;
  --fear: #ef5350;
  --neutral: #9e9e9e;
  --greed: #66bb6a;
  --extreme-greed: #2e7d32;
  --extreme-fear-bg: #ffebee;
  --fear-bg: #fff3e0;
  --neutral-bg: #f5f5f5;
  --greed-bg: #e8f5e9;
  --extreme-greed-bg: #e8f5e9;

  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-secondary: #555;
  --text-muted: #888;
  --border: #e0e0e0;
  --accent: #1976d2;
  --header-bg: #1a1a2e;
  --header-text: #ffffff;
  --shadow: 0 1px 4px rgba(0,0,0,0.08);
  --radius: 10px;
  --radius-sm: 6px;
}

/* 1. Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.6;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* 2. Layout */
#app { max-width: 1100px; margin: 0 auto; padding: 0 12px 24px; }

header#header {
  background: var(--header-bg); color: var(--header-text);
  padding: 16px 20px; margin: 0 -12px 16px;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 8px;
}
header h1 { font-size: 1.3rem; font-weight: 700; letter-spacing: 0.5px; }
.header-meta { font-size: 0.85rem; color: #aaa; display: flex; align-items: center; gap: 10px; }
.quality-badge { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.75rem; }
.quality-badge.ok { background: #2e7d32; color: #fff; }
.quality-badge.warn { background: #e65100; color: #fff; }
.quality-badge.bad { background: #c62828; color: #fff; }
.header-learn { font-size: 0.85rem; margin-left: auto; }
.header-learn a { color: #fff; text-decoration: underline; }

/* 3. Section cards */
.section { margin-bottom: 16px; }
.card {
  background: var(--card-bg); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 16px 18px;
}
.card h2 { font-size: 1rem; font-weight: 600; margin-bottom: 12px; color: var(--text-secondary); }

/* 4. Dashboard */
.fgi-hero { text-align: center; padding: 12px 0 8px; }
.fgi-number { display: flex; align-items: baseline; justify-content: center; gap: 8px; }
.fgi-value { font-size: 4rem; font-weight: 800; line-height: 1; }
.fgi-unit { font-size: 1.2rem; font-weight: 600; color: var(--text-secondary); }
.fgi-zone { font-size: 1.1rem; font-weight: 600; margin-top: 4px; }

.dashboard-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 14px; }
.stat-card { text-align: center; padding: 8px; background: var(--bg); border-radius: var(--radius-sm); }
.stat-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 4px; }
.stat-value { font-size: 1.1rem; font-weight: 700; }
.stat-value-small { font-size: 0.85rem; color: var(--text-secondary); word-break: break-all; }

.health-bar { height: 8px; background: #e0e0e0; border-radius: 4px; overflow: hidden; margin: 4px 0; }
.health-fill { height: 100%; border-radius: 4px; background: linear-gradient(90deg, #d32f2f, #e65100, #fdd835, #66bb6a, #2e7d32); transition: width 0.5s; }

.extreme-note { margin-top: 8px; text-align: center; font-size: 0.8rem; color: var(--extreme-fear); }

/* 5. Decision Matrix */
.matrix-grid {
  display: grid;
  grid-template-columns: 100px repeat(3, 1fr);
  gap: 0;
  font-size: 0.8rem;
  margin-bottom: 10px;
  overflow-x: auto;
}
.matrix-cell {
  padding: 8px 6px;
  border: 1px solid var(--border);
  text-align: center;
  display: flex; align-items: center; justify-content: center;
  min-height: 44px;
}
.matrix-header { background: #ececec; font-weight: 700; color: #333; }
.matrix-row-header { background: #ececec; font-weight: 700; color: #333; min-width: 80px; }
.matrix-cell.highlight { background: #ffe082; font-weight: 700; }

.matrix-info { font-size: 0.9rem; margin-top: 6px; }
.matrix-info p { margin: 2px 0; }

/* 6. Charts */
.chart { width: 100%; height: 280px; }
.chart-large { width: 100%; height: 380px; }
.chart-row { display: flex; gap: 12px; margin-bottom: 16px; }
.chart-row .section { flex: 1; margin-bottom: 0; }

/* 7. Signal Reference table */
.signal-table { width: 100%; border-collapse: collapse; font-size: 0.85rem; }
.signal-table th, .signal-table td {
  padding: 8px 10px; border: 1px solid var(--border); text-align: center;
}
.signal-table th { background: #ececec; font-weight: 600; }
.signal-table td { background: #fff; }

.anchor-card {
  margin-top: 12px; padding: 12px; background: #f5f5f5;
  border-radius: var(--radius-sm); font-size: 0.9rem;
}
.anchor-card strong { color: var(--text); }
.anchor-table-wrap { margin-top: 8px; }

/* 8. Extreme signals */
.extreme-signals { margin-bottom: 8px; }
.extreme-tag { display: inline-block; padding: 2px 8px; border-radius: 4px; font-size: 0.75rem; margin: 2px; font-weight: 600; }
.extreme-tag.high { background: #c8e6c9; color: #1b5e20; }
.extreme-tag.low { background: #ffcdd2; color: #b71c1c; }

/* 9. Trend controls */
.trend-controls { display: flex; gap: 8px; margin-bottom: 10px; flex-wrap: wrap; }
.trend-controls select {
  padding: 6px 10px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: 0.85rem; background: #fff; flex: 1; min-width: 100px;
}

/* 10. Date picker */
.date-controls { display: flex; gap: 8px; align-items: center; }
.date-controls input[type="date"] { max-width: 180px; padding: 6px 8px; border: 1px solid var(--border); border-radius: var(--radius-sm); font-size: 0.9rem; }
.date-controls button {
  padding: 6px 16px; border: none; border-radius: var(--radius-sm);
  background: var(--accent); color: #fff; font-size: 0.9rem; cursor: pointer;
}
.date-controls button:hover { opacity: 0.9; }
.datepicker-top { padding: 10px 16px !important; }

/* 11. Overlays */
.overlay {
  position: fixed; top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(255,255,255,0.9); display: flex;
  flex-direction: column; align-items: center; justify-content: center; z-index: 999;
}
.spinner {
  width: 40px; height: 40px; border: 4px solid #e0e0e0; border-top-color: var(--accent);
  border-radius: 50%; animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.error-box { text-align: center; padding: 24px; }
.error-box h2 { color: var(--extreme-fear); margin-bottom: 8px; }
.error-box button { margin-top: 12px; padding: 8px 24px; border: none; background: var(--accent); color: #fff; border-radius: var(--radius-sm); cursor: pointer; }

/* 12. Footer */
footer {
  text-align: center; padding: 20px 12px 12px;
  font-size: 0.75rem; color: var(--text-muted);
}
.footer-links { margin-top: 4px; }

/* 13. Footnote */
.footnote { font-size: 0.7rem; color: var(--text-muted); margin-top: 8px; }

/* 14. Responsive */
@media (max-width: 767px) {
  .fgi-value { font-size: 3rem; }
  .dashboard-grid { grid-template-columns: repeat(3, 1fr); gap: 6px; }
  .stat-card { padding: 6px; }
  .chart-row { flex-direction: column; }
  .chart-row .section { margin-bottom: 16px; }
  .chart { height: 240px; }
  .chart-large { height: 300px; }
  .matrix-grid { font-size: 0.7rem; grid-template-columns: 70px repeat(3, 1fr); }
  .matrix-cell { padding: 6px 4px; min-height: 36px; }
  header#header { flex-direction: column; text-align: center; }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .chart-row { flex-direction: column; }
  .chart-row .section { margin-bottom: 16px; }
}