/* BTC Options Dashboard - Custom Styles */

/* ===== Design System Tokens ===== */
:root {
  --color-bg-primary: #030712;      /* gray-950 */
  --color-bg-card: #111827;         /* gray-900 */
  --color-bg-card-hover: #1f2937;   /* gray-800 */
  --color-bg-input: #1f2937;
  --color-border: #374151;          /* gray-700 */
  --color-border-subtle: #1f2937;   /* gray-800 */

  --color-text-primary: #f9fafb;    /* gray-50 */
  --color-text-secondary: #9ca3af;  /* gray-400 */
  --color-text-muted: #6b7280;      /* gray-500 */

  --color-bullish: #22c55e;
  --color-bullish-dim: rgba(34, 197, 94, 0.15);
  --color-bearish: #ef4444;
  --color-bearish-dim: rgba(239, 68, 68, 0.15);
  --color-neutral: #3b82f6;
  --color-neutral-dim: rgba(59, 130, 246, 0.15);
  --color-warning: #f59e0b;
  --color-warning-dim: rgba(245, 158, 11, 0.15);
  --color-accent: #8b5cf6;

  --gradient-bullish: linear-gradient(135deg, #22c55e, #16a34a);
  --gradient-bearish: linear-gradient(135deg, #ef4444, #dc2626);
  --gradient-neutral: linear-gradient(135deg, #3b82f6, #2563eb);
  --gradient-card: linear-gradient(180deg, rgba(17, 24, 39, 1) 0%, rgba(17, 24, 39, 0.8) 100%);
  --gradient-header: linear-gradient(180deg, rgba(3, 7, 18, 0.95) 0%, rgba(3, 7, 18, 0.8) 100%);

  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-card-hover: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
  --shadow-glow-green: 0 0 20px rgba(34, 197, 94, 0.2);
  --shadow-glow-red: 0 0 20px rgba(239, 68, 68, 0.2);
  --shadow-glow-blue: 0 0 20px rgba(59, 130, 246, 0.2);

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;

  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Base ===== */
* { box-sizing: border-box; }

body {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg-primary); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-muted); }

/* ===== Navigation ===== */
.nav-fixed {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--gradient-header);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-subtle);
}

.nav-link {
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}
.nav-link:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.05);
}
.nav-link.active {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.08);
}

/* ===== Cards ===== */
.dashboard-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: var(--transition-smooth);
  overflow: hidden;
}
.dashboard-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-card-hover);
}

.card-header {
  padding: 1.25rem 1.5rem 0.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-title {
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
}
.card-body { padding: 0.75rem 1.5rem 1.5rem; }

/* ===== Metric Cards ===== */
.metric-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  transition: var(--transition-smooth);
}
.metric-card:hover {
  border-color: var(--color-border);
  transform: translateY(-1px);
}
.metric-label {
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  margin-bottom: 0.5rem;
}
.metric-value {
  font-size: 1.5rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.metric-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

/* ===== Status Dots ===== */
.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.status-dot.green { background: var(--color-bullish); box-shadow: 0 0 6px rgba(34, 197, 94, 0.5); }
.status-dot.yellow { background: var(--color-warning); box-shadow: 0 0 6px rgba(245, 158, 11, 0.5); }
.status-dot.red { background: var(--color-bearish); box-shadow: 0 0 6px rgba(239, 68, 68, 0.5); }

/* ===== Regime Badge ===== */
.regime-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.regime-badge.bullish {
  background: var(--color-bullish-dim);
  color: var(--color-bullish);
  border: 1px solid rgba(34, 197, 94, 0.3);
}
.regime-badge.bearish {
  background: var(--color-bearish-dim);
  color: var(--color-bearish);
  border: 1px solid rgba(239, 68, 68, 0.3);
}
.regime-badge.neutral {
  background: var(--color-neutral-dim);
  color: var(--color-neutral);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

/* ===== Tables ===== */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
}
.data-table thead th {
  padding: 0.625rem 0.75rem;
  text-align: left;
  font-weight: 600;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border-subtle);
  position: sticky;
  top: 0;
  background: var(--color-bg-card);
}
.data-table tbody td {
  padding: 0.5rem 0.75rem;
  border-bottom: 1px solid rgba(31, 41, 55, 0.5);
  color: var(--color-text-secondary);
}
.data-table tbody tr:hover td {
  background: rgba(255, 255, 255, 0.02);
  color: var(--color-text-primary);
}
.data-table tbody tr:last-child td { border-bottom: none; }

/* ===== Options Chain ===== */
.chain-table {
  font-size: 0.75rem;
}
.chain-table th {
  padding: 0.5rem 0.5rem;
  font-size: 0.625rem;
}
.chain-table td {
  padding: 0.375rem 0.5rem;
}
.chain-strike {
  background: rgba(59, 130, 246, 0.08) !important;
  font-weight: 700;
  color: var(--color-text-primary) !important;
  text-align: center;
}
.chain-itm { background: rgba(34, 197, 94, 0.04); }
.chain-otm { background: transparent; }

/* ===== Strategy Cards ===== */
.strategy-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-lg);
  transition: var(--transition-smooth);
  overflow: hidden;
}
.strategy-card:hover {
  border-color: var(--color-border);
}
.strategy-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}
.strategy-body { padding: 1.25rem 1.5rem; }
.strategy-tag {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.6875rem;
  font-weight: 600;
  background: var(--color-neutral-dim);
  color: var(--color-neutral);
}

/* ===== Confidence Gauge ===== */
.gauge-container {
  position: relative;
  width: 280px;
  height: 160px;
  margin: 0 auto;
}

/* ===== Glossary ===== */
.glossary-item {
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 0.5rem;
  overflow: hidden;
  transition: var(--transition-fast);
}
.glossary-item:hover { border-color: var(--color-border); }
.glossary-item summary {
  padding: 0.875rem 1.25rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--color-text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.glossary-item summary::after {
  content: "+";
  font-size: 1.25rem;
  color: var(--color-text-muted);
  transition: var(--transition-fast);
}
.glossary-item[open] summary::after {
  content: "-";
}
.glossary-item .glossary-content {
  padding: 0 1.25rem 1rem;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

/* ===== Loading ===== */
.loading-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.skeleton {
  background: linear-gradient(90deg, var(--color-bg-card) 25%, var(--color-bg-card-hover) 50%, var(--color-bg-card) 75%);
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}
@keyframes skeleton-shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ===== Buttons ===== */
.btn-primary {
  background: var(--gradient-neutral);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition-fast);
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  font-weight: 500;
  border: 1px solid var(--color-border-subtle);
  cursor: pointer;
  transition: var(--transition-fast);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.05);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

/* ===== Select ===== */
.select-styled {
  background: var(--color-bg-input);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  font-size: 0.8125rem;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%239ca3af' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14L2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 12px;
}
.select-styled:focus { outline: none; border-color: var(--color-neutral); }

/* ===== Value Colors ===== */
.val-positive { color: var(--color-bullish); }
.val-negative { color: var(--color-bearish); }
.val-neutral { color: var(--color-text-secondary); }

/* ===== Tooltip ===== */
.info-tooltip {
  position: relative;
  display: inline-flex;
  cursor: help;
}
.info-tooltip .tooltip-text {
  visibility: hidden;
  opacity: 0;
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-bg-card-hover);
  color: var(--color-text-primary);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.75rem;
  line-height: 1.5;
  white-space: nowrap;
  max-width: 280px;
  white-space: normal;
  z-index: 100;
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: var(--transition-fast);
}
.info-tooltip:hover .tooltip-text { visibility: visible; opacity: 1; }

/* ===== Section spacing ===== */
.section-gap { margin-bottom: 2rem; }

/* ===== Print ===== */
@media print {
  body { background: white; color: black; }
  .nav-fixed, .btn-primary, .btn-ghost, #glossary { display: none; }
  .dashboard-card, .strategy-card, .metric-card {
    background: white;
    border: 1px solid #ccc;
    box-shadow: none;
    break-inside: avoid;
  }
  .card-title, .metric-label { color: #666; }
  .metric-value, .card-body { color: black; }
}