/* ============================================
   Dropflow — AI Product Research Feed
   Dark theme: teal accents, amber highlights
   ============================================ */

:root {
  --bg: #0D1117;
  --surface: #161B22;
  --surface2: #1C2128;
  --border: #30363D;
  --teal: #00D4AA;
  --teal-dim: rgba(0, 212, 170, 0.12);
  --teal-glow: rgba(0, 212, 170, 0.25);
  --amber: #F59E0B;
  --amber-dim: rgba(245, 158, 11, 0.15);
  --text: #E6EDF3;
  --text-dim: #7D8590;
  --text-muted: #484F58;
  --red: #F85149;
  --green: #3FB950;
  --font-display: 'Syne', sans-serif;
  --font-body: 'DM Sans', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ── NAV ───────────────────────────────────── */
.top-nav {
  border-bottom: 1px solid var(--border);
  padding: 0 40px;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
}
.top-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  height: 60px;
  gap: 24px;
}
.top-nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  color: var(--teal);
  text-decoration: none;
  letter-spacing: -0.5px;
}
.top-nav-tagline {
  color: var(--text-muted);
  font-size: 12px;
}
.top-nav-spacer { flex: 1; }
.top-nav-links {
  display: flex;
  gap: 4px;
  align-items: center;
}
.top-nav-link {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-dim);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: 6px;
  transition: color 0.15s, background 0.15s;
}
.top-nav-link:hover { color: var(--text); background: var(--surface2); }
.top-nav-link.active { color: var(--teal); background: var(--teal-dim); }
.top-nav-badge {
  font-size: 11px;
  font-weight: 700;
  background: var(--teal);
  color: var(--bg);
  padding: 2px 7px;
  border-radius: 20px;
  margin-left: 4px;
}

/* ── PAGE HEADER ────────────────────────────── */
.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 40px 32px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}
.page-header-left {}
.page-kicker {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  color: var(--teal);
  font-weight: 600;
  margin-bottom: 10px;
}
.page-title {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: -1px;
  line-height: 1.1;
}
.page-title span { color: var(--teal); }
.page-subtitle {
  margin-top: 8px;
  font-size: 14px;
  color: var(--text-dim);
}
.page-header-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  flex-shrink: 0;
}
.score-legend {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
}
.score-legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal);
}

/* ── FILTER BAR ─────────────────────────────── */
.filter-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px 28px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.filter-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-right: 4px;
  flex-shrink: 0;
}
.filter-select {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 500;
  padding: 8px 32px 8px 12px;
  border-radius: 8px;
  cursor: pointer;
  outline: none;
  transition: border-color 0.15s;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237D8590' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  min-width: 140px;
}
.filter-select:focus { border-color: var(--teal); }
.filter-search {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 13px;
  padding: 8px 14px;
  border-radius: 8px;
  outline: none;
  min-width: 220px;
  transition: border-color 0.15s;
}
.filter-search::placeholder { color: var(--text-muted); }
.filter-search:focus { border-color: var(--teal); }
.filter-divider { width: 1px; height: 28px; background: var(--border); margin: 0 4px; }
.filter-count {
  font-size: 12px;
  color: var(--text-muted);
  margin-left: auto;
  flex-shrink: 0;
}
.filter-count strong { color: var(--text-dim); }

/* ── PRODUCT GRID ───────────────────────────── */
.product-feed-wrap {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px 80px;
}
.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

/* ── PRODUCT CARD ───────────────────────────── */
.product-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
  cursor: default;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  border-color: rgba(0, 212, 170, 0.4);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4), 0 0 0 1px rgba(0, 212, 170, 0.15);
  transform: translateY(-2px);
}

/* Score badge in corner */
.card-score {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 800;
  z-index: 1;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.score-95 { background: #00D4AA; color: #0D1117; }
.score-85 { background: #3FB950; color: #0D1117; }
.score-75 { background: #F59E0B; color: #0D1117; }
.score-65 { background: #7D8590; color: #0D1117; }
.score-55 { background: #484F58; color: #7D8590; }

.card-header {
  background: var(--surface2);
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--border);
  position: relative;
  flex-shrink: 0;
}
.card-category {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--text-muted);
  margin-bottom: 6px;
}
.card-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  padding-right: 48px;
}
.card-body { padding: 14px 16px; flex: 1; display: flex; flex-direction: column; gap: 10px; }
.card-metric {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.card-metric-label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}
.card-metric-value {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  text-align: right;
}
.card-metric-value.teal { color: var(--teal); }
.card-metric-value.amber { color: var(--amber); }
.card-metric-value.green { color: var(--green); }

/* Score bar */
.score-bar-wrap { margin-top: auto; padding-top: 6px; }
.score-bar-label {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--text-muted);
  font-weight: 600;
  margin-bottom: 6px;
}
.score-bar {
  height: 5px;
  background: var(--border);
  border-radius: 10px;
  overflow: hidden;
}
.score-bar-fill {
  height: 100%;
  border-radius: 10px;
  transition: width 0.6s ease-out;
}

/* Trend signal pill */
.trend-pill {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--amber-dim);
  border: 1px solid rgba(245, 158, 11, 0.25);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--amber);
  margin-top: 2px;
}
.trend-pill-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--amber);
  flex-shrink: 0;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Supplier badge */
.supplier-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--teal-dim);
  border: 1px solid rgba(0, 212, 170, 0.2);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  color: var(--teal);
}

/* Margin bar */
.margin-bar-wrap { }
.margin-bar {
  height: 4px;
  background: var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.margin-bar-fill {
  height: 100%;
  border-radius: 8px;
  background: var(--amber);
}

/* Empty state */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 80px 24px;
  color: var(--text-muted);
}
.empty-state h3 { font-size: 18px; font-weight: 700; color: var(--text-dim); margin-bottom: 8px; }
.empty-state p { font-size: 14px; }

/* ── FOOTER ─────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 32px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 800;
  color: var(--teal);
}
.footer-tag { font-size: 12px; color: var(--text-muted); }
.footer-note { font-size: 12px; color: var(--text-muted); }

/* ── RESPONSIVE ─────────────────────────────── */
@media (max-width: 1100px) { .product-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px)  { .product-grid { grid-template-columns: repeat(2, 1fr); } .page-header { flex-direction: column; align-items: flex-start; } .page-header-right { align-items: flex-start; } }
@media (max-width: 600px)  {
  .product-grid { grid-template-columns: 1fr; }
  .top-nav { padding: 0 20px; }
  .top-nav-tagline, .top-nav-links .top-nav-link:not(.active) { display: none; }
  .page-header { padding: 32px 20px 20px; }
  .filter-bar { padding: 0 20px 20px; }
  .product-feed-wrap { padding: 0 20px 60px; }
  .page-title { font-size: 28px; }
  .site-footer { padding: 24px 20px; flex-direction: column; gap: 8px; text-align: center; }
}