/* VVV Dashboard — design system v2
   Paleta: dark #0B1220, light #F6FAF5, akcent #2F9E44
   Czcionki: Poppins (nagłówki), Inter (treść), IBM Plex Mono (dane/ceny)
*/

:root {
  --accent: #2F9E44;
  --accent-soft: rgba(47, 158, 68, 0.15);
  --danger: #E03131;
  --card-radius: 12px;
  --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --font-headings: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

:root,
:root[data-theme='dark'] {
  --bg: #0B1220;
  --card-bg: #111B2E;
  --card-border: rgba(226, 232, 240, 0.08);
  --text: #E2E8F0;
  --text-muted: #A0AEC0;
  --control-bg: #1A2540;
  --control-border: rgba(226, 232, 240, 0.16);
  color-scheme: dark;
}

:root[data-theme='light'] {
  --bg: #F6FAF5;
  --card-bg: #FFFFFF;
  --card-border: rgba(26, 32, 44, 0.08);
  --text: #1A202C;
  --text-muted: #4A5568;
  --control-bg: #FFFFFF;
  --control-border: rgba(26, 32, 44, 0.16);
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.2s ease, color 0.2s ease;
}

/* ---------- Nagłówek ---------- */

.site-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 20px 24px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
}

.header-brand {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 16px;
}

.header-brand h1 {
  font-family: var(--font-headings);
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.02em;
}

.price {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
}

.change {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 500;
}

.change.up {
  color: var(--accent);
}

.change.down {
  color: var(--danger);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 12px;
}

.control {
  display: flex;
  align-items: center;
  gap: 8px;
}

.control-label {
  font-size: 0.85rem;
  color: var(--text-muted);
}

select {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--control-bg);
  border: 1px solid var(--control-border);
  border-radius: 8px;
  padding: 8px 12px;
  cursor: pointer;
}

select:focus-visible,
.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: 1.1rem;
  background: var(--control-bg);
  border: 1px solid var(--control-border);
  border-radius: 8px;
  cursor: pointer;
  line-height: 1;
}

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

/* ---------- Siatka wykresów ---------- */

.dashboard {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  padding: 8px 24px 32px;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  flex: 1;
}

.chart-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.chart-card--wide {
  grid-column: 1 / -1;
}

.chart-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 12px;
  padding: 16px 20px 12px;
}

.chart-header h2 {
  font-family: var(--font-headings);
  font-size: 1.05rem;
  font-weight: 600;
  margin: 0;
}

.chart-source {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.chart-note {
  margin: 0;
  padding: 6px 20px;
  font-size: 0.78rem;
  color: var(--text-muted);
  background: var(--accent-soft);
  border-top: 1px solid var(--card-border);
}

.chart-note.error {
  color: var(--danger);
  background: rgba(224, 49, 49, 0.1);
}

.chart-container {
  position: relative;
  width: 100%;
  height: 400px;
}

.chart-container iframe {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ---------- Stan ładowania / błędu wykresu ---------- */

.chart-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: var(--card-bg);
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  padding: 16px;
  z-index: 2;
}

.chart-overlay[hidden] {
  display: none;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--card-border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.retry-button {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: #fff;
  background: var(--accent);
  border: 0;
  border-radius: 8px;
  padding: 8px 16px;
  cursor: pointer;
}

.retry-button:hover {
  filter: brightness(1.1);
}

/* ---------- Stopka ---------- */

.site-footer {
  padding: 16px 24px 28px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.site-footer p {
  margin: 0;
}

/* ---------- Responsywność ---------- */

@media (max-width: 900px) {
  .dashboard {
    grid-template-columns: 1fr;
  }

  .site-header {
    padding: 16px;
  }

  .dashboard {
    padding: 4px 16px 24px;
    gap: 16px;
  }

  .chart-container {
    height: 340px;
  }
}