/* ═══════════════════════════════════════════════════════════════
   Harrisburg Area Winter Weather Dashboard — Dark Midnight Theme
   ns182wx.github.io/winter-weather/
   ═══════════════════════════════════════════════════════════════ */

:root {
  --bg-primary:    #0a0e1a;
  --bg-card:       #111827;
  --bg-card2:      #1a2235;
  --bg-card3:      #1e2d3d;
  --accent-blue:   #3b82f6;
  --accent-cyan:   #06b6d4;
  --accent-ice:    #a5f3fc;
  --accent-snow:   #e0f2fe;
  --accent-red:    #ef4444;
  --accent-orange: #f97316;
  --accent-yellow: #eab308;
  --accent-green:  #22c55e;
  --accent-purple: #a855f7;
  --text-primary:  #f1f5f9;
  --text-muted:    #94a3b8;
  --text-dim:      #64748b;
  --border:        #1e293b;
  --border-bright: #2d3f55;
  --glow-blue:     0 0 20px rgba(59,130,246,0.3);
  --glow-cyan:     0 0 20px rgba(6,182,212,0.3);
  --font-main: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --radius: 12px;
  --radius-sm: 8px;
  --transition: 0.2s ease;
}

/* ── Reset & Base ──────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59,130,246,0.08) 0%, transparent 60%),
    radial-gradient(ellipse 40% 30% at 80% 80%, rgba(6,182,212,0.05) 0%, transparent 50%);
}

/* ── Top Navigation ────────────────────────────────────────────── */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,14,26,0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-bright);
  padding: 0 1.5rem;
}
.nav-inner {
  max-width: 1400px; margin: 0 auto;
  display: flex; align-items: center; gap: 1rem; height: 60px;
}
.nav-brand {
  display: flex; align-items: center; gap: 0.6rem;
  font-weight: 700; font-size: 1rem; color: var(--accent-ice);
  text-decoration: none; white-space: nowrap;
}
.nav-brand .snowflake { font-size: 1.3rem; }
.nav-links { display: flex; gap: 0.2rem; flex-wrap: wrap; }
.nav-link {
  color: var(--text-muted); text-decoration: none;
  font-size: 0.85rem; font-weight: 500;
  padding: 0.4rem 0.75rem; border-radius: 6px;
  transition: all var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--accent-cyan); background: rgba(6,182,212,0.1);
}

/* ── Hero / Page Header ────────────────────────────────────────── */
.hero {
  padding: 3rem 1.5rem 2rem;
  max-width: 1400px; margin: 0 auto;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.4rem;
  background: rgba(59,130,246,0.15); color: var(--accent-cyan);
  border: 1px solid rgba(59,130,246,0.3);
  border-radius: 20px; padding: 0.25rem 0.8rem;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.05em;
  text-transform: uppercase; margin-bottom: 1rem;
}
.hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 800; line-height: 1.15;
  background: linear-gradient(135deg, var(--accent-ice), var(--accent-blue));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; margin-bottom: 0.75rem;
}
.hero p {
  font-size: 1.05rem; color: var(--text-muted);
  max-width: 680px; margin-bottom: 1.5rem;
}
.hero-meta {
  display: flex; flex-wrap: wrap; gap: 1.5rem;
  font-size: 0.82rem; color: var(--text-dim);
}
.hero-meta span { display: flex; align-items: center; gap: 0.3rem; }

/* ── Stat Cards ────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1rem; margin-bottom: 2rem;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1rem;
  text-align: center;
  transition: all var(--transition);
  position: relative; overflow: hidden;
}
.stat-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
}
.stat-card.blue::before  { background: var(--accent-blue); }
.stat-card.cyan::before  { background: var(--accent-cyan); }
.stat-card.red::before   { background: var(--accent-red); }
.stat-card.orange::before{ background: var(--accent-orange); }
.stat-card.green::before { background: var(--accent-green); }
.stat-card.purple::before{ background: var(--accent-purple); }
.stat-card.yellow::before{ background: var(--accent-yellow); }
.stat-card:hover { border-color: var(--border-bright); transform: translateY(-2px); }
.stat-label { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: 0.4rem; }
.stat-value { font-size: 2rem; font-weight: 800; line-height: 1; }
.stat-value.blue   { color: var(--accent-blue); }
.stat-value.cyan   { color: var(--accent-cyan); }
.stat-value.red    { color: var(--accent-red); }
.stat-value.orange { color: var(--accent-orange); }
.stat-value.green  { color: var(--accent-green); }
.stat-value.purple { color: var(--accent-purple); }
.stat-value.yellow { color: var(--accent-yellow); }
.stat-sub { font-size: 0.75rem; color: var(--text-dim); margin-top: 0.2rem; }

/* ── Section Layout ────────────────────────────────────────────── */
.section { max-width: 1400px; margin: 0 auto; padding: 0 1.5rem 3rem; }
.section-header {
  display: flex; align-items: center; gap: 0.75rem;
  margin-bottom: 1.5rem; padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border);
}
.section-header h2 { font-size: 1.3rem; font-weight: 700; }
.section-icon { font-size: 1.4rem; }

/* ── Storm Cards ───────────────────────────────────────────────── */
.storm-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}
.storm-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none; color: inherit; display: block;
}
.storm-card:hover {
  border-color: var(--accent-blue);
  box-shadow: var(--glow-blue);
  transform: translateY(-2px);
}
.storm-card-header {
  display: flex; justify-content: space-between; align-items: flex-start;
  margin-bottom: 0.75rem;
}
.storm-date { font-size: 0.85rem; color: var(--text-muted); }
.storm-cat {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.05em;
  padding: 0.2rem 0.6rem; border-radius: 20px;
  text-transform: uppercase;
}
.cat-3-6   { background: rgba(59,130,246,0.2);  color: #93c5fd; }
.cat-6-10  { background: rgba(245,158,11,0.2);  color: #fcd34d; }
.cat-10-15 { background: rgba(239,68,68,0.2);   color: #fca5a5; }
.cat-15    { background: rgba(168,85,247,0.2);  color: #d8b4fe; }
.storm-snow {
  font-size: 2.2rem; font-weight: 900; line-height: 1;
  color: var(--accent-ice); margin-bottom: 0.5rem;
}
.storm-snow span { font-size: 1rem; font-weight: 400; color: var(--text-muted); }
.storm-meta {
  display: grid; grid-template-columns: 1fr 1fr; gap: 0.4rem;
  font-size: 0.78rem; color: var(--text-muted);
}
.storm-meta-item { display: flex; align-items: center; gap: 0.3rem; }
.storm-rsi-badge {
  margin-top: 0.75rem; padding: 0.3rem 0.6rem;
  background: rgba(6,182,212,0.15); border: 1px solid rgba(6,182,212,0.3);
  border-radius: 6px; font-size: 0.72rem; color: var(--accent-cyan);
  display: inline-flex; align-items: center; gap: 0.3rem;
}

/* ── Chart Container ───────────────────────────────────────────── */
.chart-wrap {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem; margin-bottom: 1.25rem;
}
.chart-title {
  font-size: 0.9rem; font-weight: 600; color: var(--text-muted);
  margin-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem;
}
.chart-container { position: relative; height: 280px; }
.chart-container.tall { height: 380px; }
.chart-container.short { height: 180px; }

/* ── Storm Profile Page ────────────────────────────────────────── */
.storm-profile-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 2rem 1.5rem;
}
.storm-profile-title {
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 800;
  background: linear-gradient(135deg, white, var(--accent-ice));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.station-tabs {
  display: flex; gap: 0.5rem; flex-wrap: wrap;
  margin: 1.5rem 0 1rem;
}
.station-tab {
  padding: 0.5rem 1rem; border-radius: 8px; cursor: pointer;
  font-size: 0.85rem; font-weight: 600; border: 1px solid var(--border);
  background: var(--bg-card2); color: var(--text-muted);
  transition: all var(--transition);
}
.station-tab:hover, .station-tab.active {
  border-color: var(--accent-cyan); color: var(--accent-cyan);
  background: rgba(6,182,212,0.1);
}

/* ── Data Table ────────────────────────────────────────────────── */
.data-table-wrap { overflow-x: auto; border-radius: var(--radius); }
.data-table {
  width: 100%; border-collapse: collapse;
  font-size: 0.82rem;
}
.data-table th {
  background: var(--bg-card2); color: var(--text-muted);
  padding: 0.6rem 0.75rem; text-align: left;
  font-weight: 600; font-size: 0.75rem;
  text-transform: uppercase; letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.data-table td {
  padding: 0.5rem 0.75rem; border-bottom: 1px solid var(--border);
  color: var(--text-primary);
}
.data-table tr:hover td { background: rgba(255,255,255,0.03); }
.data-table .mono { font-family: var(--font-mono); }

/* ── Map Container ─────────────────────────────────────────────── */
.map-wrap {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden; margin-bottom: 1.5rem;
}
.map-header {
  padding: 0.75rem 1rem; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
}
.map-title { font-size: 0.9rem; font-weight: 600; }
#rsi-map, .leaflet-map { height: 480px; }

/* ── Weather Condition Tags ────────────────────────────────────── */
.wx-tag {
  display: inline-flex; align-items: center; gap: 0.25rem;
  padding: 0.15rem 0.5rem; border-radius: 4px;
  font-size: 0.72rem; font-weight: 600;
}
.wx-snow  { background: rgba(165,243,252,0.15); color: var(--accent-ice); }
.wx-fzra  { background: rgba(239,68,68,0.15);   color: #fca5a5; }
.wx-sleet { background: rgba(168,85,247,0.15);  color: #d8b4fe; }
.wx-rain  { background: rgba(59,130,246,0.15);  color: #93c5fd; }
.wx-fog   { background: rgba(148,163,184,0.15); color: var(--text-muted); }

/* ── Severity Bar ──────────────────────────────────────────────── */
.severity-bar { height: 6px; border-radius: 3px; background: var(--border); overflow: hidden; }
.severity-fill { height: 100%; border-radius: 3px; transition: width 0.8s ease; }

/* ── Snowfall gradient legend ──────────────────────────────────── */
.snow-gradient { height: 12px; border-radius: 6px;
  background: linear-gradient(to right, #dbeafe, #93c5fd, #3b82f6, #1d4ed8, #1e3a8a, #312e81); }

/* ── Footer ────────────────────────────────────────────────────── */
footer {
  border-top: 1px solid var(--border);
  padding: 2rem 1.5rem; text-align: center;
  color: var(--text-dim); font-size: 0.8rem;
  margin-top: 4rem;
}
footer a { color: var(--accent-cyan); text-decoration: none; }
footer a:hover { text-decoration: underline; }

/* ── Utilities ─────────────────────────────────────────────────── */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.grid-3 { display: grid; grid-template-columns: repeat(3,1fr); gap: 1rem; }
.flex   { display: flex; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.gap-1  { gap: 0.5rem; } .gap-2 { gap: 1rem; }
.mb-1   { margin-bottom: 0.5rem; }
.mb-2   { margin-bottom: 1rem; }
.mb-3   { margin-bottom: 1.5rem; }
.text-muted { color: var(--text-muted); }
.text-dim   { color: var(--text-dim); }
.text-sm    { font-size: 0.82rem; }
.text-xs    { font-size: 0.72rem; }
.bold       { font-weight: 700; }
.mono       { font-family: var(--font-mono); }
.badge {
  display: inline-block; padding: 0.2rem 0.6rem; border-radius: 20px;
  font-size: 0.72rem; font-weight: 600;
}
.badge-blue { background: rgba(59,130,246,0.2); color: #93c5fd; }
.badge-cyan { background: rgba(6,182,212,0.2);  color: var(--accent-cyan); }
.badge-red  { background: rgba(239,68,68,0.2);  color: #fca5a5; }
.divider { height: 1px; background: var(--border); margin: 1.5rem 0; }

/* ── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .nav-links { display: none; }
  .hero h1 { font-size: 1.6rem; }
  .storm-grid { grid-template-columns: 1fr; }
}

/* ── Leaflet overrides ─────────────────────────────────────────── */
.leaflet-container { background: #0d1b2a !important; }
.leaflet-tile { filter: brightness(0.7) saturate(0.5) hue-rotate(200deg); }
.leaflet-popup-content-wrapper {
  background: var(--bg-card) !important; color: var(--text-primary) !important;
  border: 1px solid var(--border-bright) !important; border-radius: 8px !important;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5) !important;
}
.leaflet-popup-tip { background: var(--bg-card) !important; }

/* ── Chart.js / Plotly dark overrides ────────────────────────────*/
.js-plotly-plot .plotly { background: transparent !important; }