/* ==========================================================================
   TMB-TRADER — Live Dashboard Styles
   Dark theme · trading-terminal aesthetic · responsive grid
   ========================================================================== */

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

:root {
  --bg-primary: #0b0e14;
  --bg-secondary: #131a24;
  --bg-card: #1a2330;
  --bg-card-hover: #1f2b3a;

  --text-primary: #e6edf3;
  --text-secondary: #8b949e;
  --text-muted: #6e7681;

  --green: #3fb950;
  --green-dim: rgba(63, 185, 80, 0.12);
  --red: #f85149;
  --red-dim: rgba(248, 81, 73, 0.12);
  --accent: #58a6ff;
  --border: #30363d;

  --radius: 10px;
  --font-mono: "SF Mono", "Fira Code", "JetBrains Mono", monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;

  --transition: 200ms ease;
}

html {
  font-size: 15px;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ==========================================================================
   Header
   ========================================================================== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}

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

.header__title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header__badge {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: var(--green);
  color: #000;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.header__right {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.header__status {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.header__status--connected { color: var(--green); }
.header__status--disconnected { color: var(--red); }

.header__time {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Dashboard Grid
   ========================================================================== */
.dashboard {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  padding: 1.5rem;
  align-content: start;
}

/* ==========================================================================
   Ticker Card
   ========================================================================== */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  transition: background var(--transition), border-color var(--transition);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.card:hover {
  background: var(--bg-card-hover);
  border-color: #3d444d;
}

/* Flash overlay for price updates */
.card::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  opacity: 0;
  pointer-events: none;
  transition: opacity 80ms ease;
}

.card--flash-up::after { background: var(--green-dim); opacity: 1; }
.card--flash-down::after { background: var(--red-dim); opacity: 1; }

.card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
}

.card__symbol {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.03em;
}

.card__pair {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
}

.card__price {
  font-family: var(--font-mono);
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.card__change {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 500;
  padding: 0.15rem 0.6rem;
  border-radius: 6px;
  margin-bottom: 0.85rem;
}

.card__change--positive {
  color: var(--green);
  background: var(--green-dim);
}

.card__change--negative {
  color: var(--red);
  background: var(--red-dim);
}

.card__stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}

.card__stat {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
}

.card__stat-label {
  color: var(--text-muted);
}

.card__stat-value {
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.5rem;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  font-size: 0.75rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 640px) {
  .dashboard {
    grid-template-columns: 1fr;
    padding: 1rem;
  }
  .header {
    flex-wrap: wrap;
    gap: 0.5rem;
  }
  .header__right {
    width: 100%;
    justify-content: space-between;
  }
}