/* Bitcoin LTV - modern dark theme, responsive */

:root {
  --font-sans: "DM Sans", system-ui, sans-serif;
  --font-display: "Syne", var(--font-sans);
  --font-mono: "JetBrains Mono", monospace;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --radius: 10px;
  --radius-sm: 6px;
  --transition: 0.2s ease;
}

[data-theme="dark"] {
  --bg: #14161a;
  --bg-card: #1c1f26;
  --bg-input: #242830;
  --text: #e8e9ed;
  --text-muted: #989aa8;
  --border: #2d3139;
  --accent: #f7931a;
  --accent-dim: #c7700a;
  --success: #22c55e;
  --danger: #ef4444;
  --chart-grid: #2d3139;
  --chart-text: #989aa8;
}

[data-theme="light"] {
  --bg: #efece5;
  --bg-card: #f5f2eb;
  --bg-input: #e8e4dc;
  --text: #1a1a1f;
  --text-muted: #6b6b76;
  --border: #d9d4ca;
  --accent: #e68600;
  --accent-dim: #b86b00;
  --success: #16a34a;
  --danger: #dc2626;
  --chart-grid: #d9d4ca;
  --chart-text: #6b6b76;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

[data-theme="dark"] body {
  background: radial-gradient(ellipse 120% 80% at 0% -20%, rgba(247, 147, 26, 0.04) 0%, transparent 50%), var(--bg);
}

[data-theme="light"] body {
  background: radial-gradient(ellipse 100% 60% at 100% 0%, rgba(230, 134, 0, 0.03) 0%, transparent 50%), var(--bg);
}

.app {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--space-lg);
  min-height: 100vh;
}

/* Header */
.header {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: var(--space-md);
}

.logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0;
  letter-spacing: -0.03em;
}

.logo .accent {
  color: var(--accent);
  font-weight: 600;
}

.tagline {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-style: italic;
}

.header-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.btc-price {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
}

.currency-select-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

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

.currency-select {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
  cursor: pointer;
}

.theme-toggle {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  cursor: pointer;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition), border-color var(--transition);
  color: var(--text);
}

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

.theme-toggle .theme-icon {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition);
}

.theme-toggle .theme-icon svg {
  display: block;
}

/* Light mode: show sun, hide moon */
[data-theme="light"] .theme-toggle .theme-icon-sun {
  opacity: 1;
  pointer-events: auto;
}
[data-theme="light"] .theme-toggle .theme-icon-moon {
  opacity: 0;
  pointer-events: none;
}

/* Dark mode: show moon, hide sun */
[data-theme="dark"] .theme-toggle .theme-icon-sun {
  opacity: 0;
  pointer-events: none;
}
[data-theme="dark"] .theme-toggle .theme-icon-moon {
  opacity: 1;
  pointer-events: auto;
}

/* Cards */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

[data-theme="dark"] .card {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.card h2 {
  margin: 0 0 var(--space-md);
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Price card */
.price-card {
  border-left-width: 4px;
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(247, 147, 26, 0.03) 100%);
}

[data-theme="light"] .price-card {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(230, 134, 0, 0.04) 100%);
}

.price-card .price-value {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
}

.price-card .btc-price {
  font-size: 1.5rem;
  font-weight: 600;
}

.price-card .price-value-ibit {
  margin-top: var(--space-xs);
}

.price-card .ibit-price {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
}

.regime-card {
  border-left-width: 4px;
}

.regime-card .regime-value {
  margin: 0;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.regime-card .regime-label {
  font-size: 1.25rem;
  font-weight: 600;
}

.regime-card .regime-plrr {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-family: var(--font-mono);
}

.regime-card.regime-bullish {
  border-left-color: var(--success);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(34, 197, 94, 0.06) 100%);
}

.regime-card.regime-bearish {
  border-left-color: var(--danger);
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(239, 68, 68, 0.06) 100%);
}

.regime-card.regime-neutral {
  border-left-color: var(--border);
}

[data-theme="light"] .regime-card.regime-bullish {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(22, 163, 74, 0.08) 100%);
}

[data-theme="light"] .regime-card.regime-bearish {
  background: linear-gradient(135deg, var(--bg-card) 0%, rgba(220, 38, 38, 0.06) 100%);
}

/* Inputs */
.inputs-card .input-group {
  margin-bottom: var(--space-md);
}

.input-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: var(--space-xs);
}

.inputs-card label {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: var(--space-xs);
}

.inputs-card input[type="number"] {
  width: 100%;
  max-width: 220px;
  font-family: var(--font-mono);
  font-size: 1rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text);
}

.portfolio-input-row,
.ltv-input-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
}

.portfolio-unit,
.ltv-presets {
  display: flex;
  gap: var(--space-xs);
}

.unit-btn,
.preset-btn {
  font-size: 0.85rem;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg-input);
  color: var(--text-muted);
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.unit-btn:hover,
.preset-btn:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.unit-btn.active,
.preset-btn.active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.btn {
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  margin-top: var(--space-sm);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-primary:active {
  transform: scale(0.98);
}

/* Loading & error */
.loading,
.error {
  padding: var(--space-md);
  margin-bottom: var(--space-lg);
  border-radius: var(--radius-sm);
}

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

.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--danger);
  color: var(--danger);
}

.hidden {
  display: none !important;
}

/* Safe to borrow */
.recommend-card .recommend-value {
  font-size: 1.75rem;
  font-weight: 700;
  font-family: var(--font-mono);
  margin: 0 0 var(--space-sm);
  color: var(--accent);
}

.recommend-ltv {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-left: 0.25em;
}

.recommend-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Rebalance to safe LTV */
.rebalance-card .rebalance-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-mono);
  margin: 0 0 var(--space-sm);
  color: var(--accent);
}

.rebalance-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Floor table */
.table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.floor-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.floor-table th,
.floor-table td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.floor-table th {
  color: var(--text-muted);
  font-weight: 500;
}

.floor-table .floor-source-link {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

.floor-table .floor-source-link:hover {
  text-decoration: underline;
}

.floor-table td {
  font-family: var(--font-mono);
}

.floor-table tbody tr:last-child td {
  border-bottom: none;
}

/* Aggregate rows: used floor and safe floor — separate block from breakdown */
.floor-table .floor-row-aggregate td {
  border-top: 2px solid var(--border);
  background: var(--bg-input);
  font-weight: 500;
}

/* Charts */
.chart-container {
  position: relative;
  width: 100%;
  min-height: 360px;
  margin-bottom: var(--space-md);
}

.chart-container-bar {
  min-height: 160px;
  height: 180px;
}

.liquidation-note {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Scenario slider */
.slider-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-md);
}

.slider-wrap label {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.slider-with-marker {
  position: relative;
  flex: 1;
  min-width: 120px;
  max-width: 320px;
}

.slider-with-marker input[type="range"] {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 8px;
  border-radius: 4px;
  /* Filled 0–current: green when current ≤ safe, green then red when current > safe; unfilled gray */
  background: linear-gradient(
    to right,
    var(--success) 0%,
    var(--success) min(calc(var(--current-pct, 0) * 1%), calc(var(--safe-pct, 100) * 1%)),
    var(--danger) min(calc(var(--current-pct, 0) * 1%), calc(var(--safe-pct, 100) * 1%)),
    var(--danger) calc(var(--current-pct, 0) * 1%),
    var(--border) calc(var(--current-pct, 0) * 1%),
    var(--border) 100%
  );
  -webkit-appearance: none;
  appearance: none;
}

.slider-with-marker input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

.slider-with-marker input[type="range"]::-moz-range-track {
  background: linear-gradient(
    to right,
    var(--success) 0%,
    var(--success) min(calc(var(--current-pct, 0) * 1%), calc(var(--safe-pct, 100) * 1%)),
    var(--danger) min(calc(var(--current-pct, 0) * 1%), calc(var(--safe-pct, 100) * 1%)),
    var(--danger) calc(var(--current-pct, 0) * 1%),
    var(--border) calc(var(--current-pct, 0) * 1%),
    var(--border) 100%
  );
  height: 8px;
  border-radius: 4px;
}

.slider-with-marker input[type="range"]::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

.slider-safe-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 3px;
  height: 20px;
  border-radius: 2px;
  background: var(--success);
  pointer-events: none;
  z-index: 1;
  box-shadow: 0 0 0 1px var(--bg-card);
}

.slider-safe-marker::after {
  content: "Safe";
  position: absolute;
  left: 50%;
  top: -1.4em;
  transform: translateX(-50%);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--success);
  white-space: nowrap;
}

.slider-wrap output {
  font-family: var(--font-mono);
  font-size: 1rem;
  min-width: 6ch;
}

/* Risk section */
.risk-desc {
  margin: 0 0 var(--space-md);
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Disclaimer */
.disclaimer {
  margin: var(--space-2xl) 0 0;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
  width: 100%;
}

.credit {
  margin: var(--space-md) 0 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.credit a {
  color: var(--accent);
  text-decoration: none;
}

.credit a:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 640px) {
  .app {
    padding: var(--space-md);
  }

  .header {
    flex-direction: column;
    align-items: flex-start;
  }

  .header-actions {
    margin-left: 0;
    width: 100%;
  }

  .inputs-card input[type="number"] {
    max-width: 100%;
  }

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

  .chart-container-bar {
    height: 160px;
    min-height: 140px;
  }
}