@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&display=swap');

/* ─── Custom Properties ───────────────────────────────────────────── */
:root {
  --bg-deep:      #070a12;
  --bg-card:      #0d1525;
  --bg-surface:   #121e33;
  --bg-hover:     #172540;
  --border:       #1c2d48;
  --border-bright:#2a4060;

  --text-primary:   #ddeeff;
  --text-secondary: #6b90b8;
  --text-dim:       #3d5a7a;

  --accent:       #4a8fd4;

  /* KP color palette */
  --c-quiet:      #22c55e;
  --c-unsettled:  #84cc16;
  --c-active:     #eab308;
  --c-minor:      #f97316;
  --c-moderate:   #ef4444;
  --c-strong:     #dc2626;
  --c-severe:     #b91c1c;
  --c-extreme:    #7c3aed;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

/* ─── Reset & Base ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Space Grotesk', system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  /* Aurora glow at the top */
  background-image:
    radial-gradient(ellipse 100% 45% at 50% -5%, rgba(74,143,212,0.12) 0%, transparent 65%),
    radial-gradient(ellipse 60% 30% at 20% 0%, rgba(34,197,94,0.05) 0%, transparent 50%),
    radial-gradient(ellipse 60% 30% at 80% 0%, rgba(124,58,237,0.05) 0%, transparent 50%);
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ─── Header ──────────────────────────────────────────────────────── */
.site-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: rgba(13, 21, 37, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 1rem;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.logo-icon {
  width: 28px;
  height: 28px;
  color: var(--accent);
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(74,143,212,0.6));
}

.site-header h1 {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  line-height: 1.2;
}

.subtitle {
  font-size: 0.75rem;
  color: var(--text-secondary);
  display: block;
  line-height: 1;
}

/* ─── KP Card (header) ────────────────────────────────────────────── */
.kp-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.6rem 1.25rem;
  min-width: 110px;
  text-align: center;
  transition: border-color 0.4s ease, box-shadow 0.4s ease;
}

.kp-card-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-secondary);
  font-weight: 500;
}

.kp-card-value {
  font-size: 2.25rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.03em;
  transition: color 0.4s ease;
}

.kp-storm-badge {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-secondary);
  transition: color 0.4s ease;
}

/* ─── Status Section ──────────────────────────────────────────────── */
.status-section {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  gap: 1rem;
  flex-wrap: wrap;
}

.aurora-alert {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-left-color: var(--text-dim);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  transition: border-left-color 0.4s ease;
  flex: 1;
  min-width: 280px;
}

.aurora-alert-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  transition: all 0.4s ease;
}

.aurora-visibility-main {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.aurora-visibility-sub {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-top: 0.1rem;
}

.refresh-info {
  font-size: 0.75rem;
  color: var(--text-dim);
  white-space: nowrap;
}

/* ─── Chart Section ───────────────────────────────────────────────── */
.chart-section {
  margin: 0 2rem 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.section-header h2,
.scale-section h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.time-range-buttons {
  display: flex;
  gap: 0.375rem;
}

.range-btn {
  background: var(--bg-surface);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.3rem 0.75rem;
  font-size: 0.8rem;
  font-family: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, color 0.15s, border-color 0.15s;
}

.range-btn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--border-bright);
}

.range-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.chart-wrapper {
  position: relative;
  height: 300px;
}

#kp-chart {
  width: 100% !important;
  height: 100% !important;
}

/* ─── KP Scale Section ────────────────────────────────────────────── */
.scale-section {
  margin: 0 2rem 2rem;
}

.scale-section h2 {
  margin-bottom: 1rem;
}

.scale-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 0.625rem;
}

.scale-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left-width: 4px;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  transition: background 0.15s;
}

.scale-item:hover {
  background: var(--bg-surface);
}

.scale-item-title {
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.scale-item-note {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

/* ─── Footer ──────────────────────────────────────────────────────── */
.site-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ─── KP Color Classes ────────────────────────────────────────────── */
.kp-quiet     { color: var(--c-quiet);     border-left-color: var(--c-quiet) !important; }
.kp-unsettled { color: var(--c-unsettled); border-left-color: var(--c-unsettled) !important; }
.kp-active    { color: var(--c-active);    border-left-color: var(--c-active) !important; }
.kp-minor     { color: var(--c-minor);     border-left-color: var(--c-minor) !important; }
.kp-moderate  { color: var(--c-moderate);  border-left-color: var(--c-moderate) !important; }
.kp-strong    { color: var(--c-strong);    border-left-color: var(--c-strong) !important; }
.kp-severe    { color: var(--c-severe);    border-left-color: var(--c-severe) !important; }
.kp-extreme   { color: var(--c-extreme);   border-left-color: var(--c-extreme) !important; }

/* ─── Responsive ──────────────────────────────────────────────────── */
@media (max-width: 640px) {
  .site-header { padding: 0.875rem 1rem; }
  .status-section { padding: 0.875rem 1rem; }
  .chart-section { margin: 0 1rem 1.5rem; }
  .scale-section { margin: 0 1rem 1.5rem; }
  .site-footer  { padding: 0.875rem 1rem; }
  .chart-wrapper { height: 220px; }
  .scale-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 400px) {
  .scale-grid { grid-template-columns: 1fr; }
  .site-header h1 { font-size: 1.1rem; }
}