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

/* ── CSS custom properties ────────────────────────────────────────────────── */
:root {
  --accent:       #2dd4bf;
  --radius:       14px;

  /* dark (default) */
  --bg:           #0B1120;
  --bg-card:      #161F30;
  --border:       #243047;
  --text:         #F1F5F9;
  --text-muted:   #94A3B8;
  --shadow:       0 4px 24px rgba(0, 0, 0, 0.45);
  --skeleton-base: #1E293B;
  --skeleton-shine: rgba(255, 255, 255, 0.06);
}

[data-theme="light"] {
  --accent:       #0D9488;
  --bg:           #F0F4F8;
  --bg-card:      #FFFFFF;
  --border:       #DDE3EE;
  --text:         #0F172A;
  --text-muted:   #64748B;
  --shadow:       0 4px 24px rgba(0, 0, 0, 0.09);
  --skeleton-base: #E2E8F0;
  --skeleton-shine: rgba(255, 255, 255, 0.55);
}

/* ── Base typography & body ───────────────────────────────────────────────── */
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  transition: background 0.25s, color 0.25s;
}

/* ── Header ───────────────────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.125rem 2rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 200;
  gap: 1rem;
}

.header-left {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

header h1 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.global-ts {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-shrink: 0;
}

.home-link {
  font-family: Consolas, Menlo, monospace;
  font-size: 0.8rem;
  color: var(--accent);
  text-decoration: none;
  opacity: 0.75;
  transition: opacity 0.2s;
  white-space: nowrap;
}

.home-link:hover,
.home-link:focus-visible {
  opacity: 1;
}

#theme-toggle {
  flex-shrink: 0;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.45rem 0.85rem;
  font-size: 1.05rem;
  cursor: pointer;
  color: var(--text);
  transition: border-color 0.2s, background 0.2s;
  line-height: 1;
}

#theme-toggle:hover {
  border-color: var(--accent);
}

/* ── Main layout ──────────────────────────────────────────────────────────── */
main {
  max-width: 1440px;
  margin: 0 auto;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2.25rem;
}

.section-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

/* ── 3-column grid ────────────────────────────────────────────────────────── */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

/* ── Card base ────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: border-color 0.25s, transform 0.2s;
}

.card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.color-cz { color: #2563EB; }
.color-eu { color: #6B7280; }

/* ── Currency card internals ──────────────────────────────────────────────── */
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}

.currency-label {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  text-transform: uppercase;
}

.trend {
  font-size: 1.35rem;
  font-weight: 800;
  line-height: 1;
  min-width: 1.5rem;
  text-align: right;
}

.currency-left {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
}

.card-value {
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text);
  display: inline-block;
}

.sparkline-wrap {
  width: 100%;
  height: 165px;
  margin-top: 0.75rem;
  margin-bottom: 0.85rem;
  position: relative;
}

.sparkline-wrap canvas {
  display: block;
}

.card-date {
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* ── Dual-value inline (inflace, nezaměstnanost) ──────────────────────────── */
.card-value--sm {
  font-size: 1.3rem;
}

.dual-kpi-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.dual-kpi-unit {
  font-size: 0.95rem;
  color: var(--text-muted);
  font-weight: 500;
}

.dual-sep {
  color: var(--border);
  font-size: 0.9rem;
  margin: 0 0.1rem;
}

/* ── Skeleton loader ──────────────────────────────────────────────────────── */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--skeleton-base) !important;
  color: transparent !important;
  border-radius: 6px;
  user-select: none;
  pointer-events: none;
}

.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--skeleton-shine) 50%,
    transparent 100%
  );
  animation: shimmer 1.6s infinite;
}

@keyframes shimmer {
  0%   { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

/* ── Error state ──────────────────────────────────────────────────────────── */
.data-error {
  color: #EF4444 !important;
  font-size: 0.85rem !important;
  font-weight: 500;
}

/* ── Trend colours ────────────────────────────────────────────────────────── */
.trend-up   { color: #10B981; }
.trend-down { color: #EF4444; }
.trend-flat { color: var(--text-muted); }

/* ── Responsive ───────────────────────────────────────────────────────────── */
@media (max-width: 960px) {
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .wide-ts {
    margin-left: 0;
    width: 100%;
  }
}

@media (max-width: 640px) {
  main { padding: 1rem; gap: 1.5rem; }
  header { padding: 1rem; }
  header h1 { font-size: 0.95rem; }
  .card-value { font-size: 2rem; }
  .kpi-value { font-size: 1.6rem; }
  .chart-wrap { height: 200px; }
}