*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --gold: #C9973A; --gold-pale: rgba(201,151,58,0.08);
  --bg: #0E0C09; --surface: #161310; --surface2: #1E1A14;
  --border: rgba(201,151,58,0.18); --border-hover: rgba(201,151,58,0.45);
  --text: #F0E8D6; --muted: #8A7F6A;
  --green: #4CAF7D; --red: #E05252;
}

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 2rem 1.5rem 4rem;
}

/* ── Header ── */
.header { text-align: center; margin-bottom: 2rem; }
.header-ornament {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; margin-bottom: 1rem;
}
.ornament-line { width: 50px; height: 1px; background: var(--gold); opacity: 0.5; }
.ornament-diamond { width: 8px; height: 8px; background: var(--gold); transform: rotate(45deg); }
.header h1 {
  font-family: 'Playfair Display', serif;
  font-size: clamp(1.4rem, 5vw, 2.6rem);
  color: var(--gold); font-weight: 700;
}
.header p {
  color: var(--muted); font-size: 0.78rem; margin-top: 0.4rem;
  letter-spacing: 0.1em; text-transform: uppercase;
}

/* ── Back link ── */
.back-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--gold); font-size: 0.78rem; text-decoration: none;
  letter-spacing: 0.06em; text-transform: uppercase;
  margin-bottom: 1.5rem; transition: opacity 0.2s;
}
.back-link:hover { opacity: 0.65; }

/* ── Controls ── */
.controls {
  display: flex; flex-wrap: wrap; gap: 0.6rem;
  align-items: center; justify-content: flex-start;
  max-width: 1200px; margin: 0 auto 1rem;
}

input[type="datetime-local"]::-webkit-calendar-picker-indicator {
  filter: invert(0.6) sepia(1) saturate(2) hue-rotate(5deg);
  cursor: pointer;
}

/* ── Range tabs ── */
.range-tabs {
  display: flex; flex-wrap: wrap; gap: 6px;
}
.range-tab {
  background: transparent; border: 1px solid var(--border);
  color: var(--muted); font-family: 'DM Sans', sans-serif;
  font-size: 0.73rem; padding: 5px 12px; border-radius: 100px;
  cursor: pointer; letter-spacing: 0.05em; transition: all 0.2s;
  white-space: nowrap;
}
.range-tab:hover,
.range-tab.active {
  background: var(--gold-pale);
  border-color: var(--border-hover);
  color: var(--gold);
}

/* ── Custom range bar ── */
.custom-bar-inner {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: 14px; padding: 12px 16px;
}
.custom-bar-label {
  font-size: 0.75rem; color: var(--muted);
  letter-spacing: 0.05em; text-transform: uppercase;
  white-space: nowrap;
}
.custom-input {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text); font-family: 'DM Sans', sans-serif;
  font-size: 0.8rem; padding: 6px 10px;
  border-radius: 8px; outline: none; cursor: pointer;
  min-width: 0; flex: 1 1 160px;
}
.custom-apply-btn {
  background: var(--gold-pale); border: 1px solid var(--border-hover);
  color: var(--gold); font-family: 'DM Sans', sans-serif;
  font-size: 0.76rem; padding: 7px 16px;
  border-radius: 100px; cursor: pointer;
  letter-spacing: 0.05em; text-transform: uppercase;
  transition: background 0.2s; white-space: nowrap;
}
.custom-apply-btn:hover { background: rgba(201,151,58,0.15); }
.custom-range-info {
  font-size: 0.73rem; color: var(--muted); flex: 1 1 100%;
}


/* ── Chart card ── */
.chart-card {
  max-width: 1200px; margin: 0 auto 1.5rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 18px; padding: 1.25rem; position: relative;
}
.chart-wrap { position: relative; height: 420px; }

/* ── Loading ── */
.loading {
  text-align: center; padding: 4rem;
  color: var(--muted); font-size: 0.88rem;
}

/* ════════════════════════════════════════
   RESPONSIVE BREAKPOINTS
   ════════════════════════════════════════ */

/* Tablet — 768px and below */
@media (max-width: 768px) {
  body { padding: 1.5rem 1rem 3rem; }

  .chart-wrap { height: 340px; }

  .controls { gap: 0.5rem; }

  .range-tabs { gap: 5px; }
  .range-tab { font-size: 0.7rem; padding: 4px 10px; }

  .toggle-btn { font-size: 0.68rem; padding: 4px 9px; }
  .toggle-dot { width: 6px; height: 6px; }

  .custom-bar-inner { gap: 8px; padding: 10px 14px; }
  .custom-input { font-size: 0.76rem; padding: 5px 8px; flex: 1 1 140px; }
}

/* Mobile — 480px and below */
@media (max-width: 480px) {
  body { padding: 1rem 0.75rem 3rem; }

  .header { margin-bottom: 1.2rem; }

  .chart-wrap { height: 260px; }

  /* Stack range tabs into a scrollable row */
  .range-tabs {
    width: 100%;
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 4px;
    scrollbar-width: none;
  }
  .range-tabs::-webkit-scrollbar { display: none; }
  .range-tab { flex-shrink: 0; font-size: 0.68rem; padding: 4px 9px; }

  /* Custom bar stacks vertically */
  .custom-bar-inner { flex-direction: column; align-items: stretch; gap: 8px; }
  .custom-input { flex: 1 1 auto; width: 100%; }
  .custom-apply-btn { width: 100%; text-align: center; }
  .custom-range-info { text-align: center; }

  .chart-card { padding: 0.85rem; border-radius: 14px; }
}

/* Very small — 360px and below */
@media (max-width: 360px) {
  .chart-wrap { height: 220px; }
  .header h1 { font-size: 1.3rem; }
}