/*
 * Theme tokens and component-level overrides for light/dark modes.
 * - Define semantic CSS variables under :root and [data-theme="dark"].
 * - Keep Bootstrap defaults; only override colors via variables for a cohesive look.
 */

:root {
  /* Base colors */
  --color-bg: #ffffff;
  --color-text: #0b1220;
  --color-text-muted: #6c757d;
  --color-border: #e5e7eb;
  --color-elevated: #ffffff;
  --color-sidebar-bg: #f8f9fa;
  --color-nav-bg: #f8f9fa;
  --color-nav-text: #212529;
  --color-table-header-bg: #f8f9fa;
  --color-overlay: rgba(0, 0, 0, 0.5);
  --color-grid: rgba(0, 0, 0, 0.15);

  /* Sidebar section accents */
  --color-sidebar-section-bg: rgba(16, 24, 40, 0.04);
  --color-sidebar-divider: rgba(16, 24, 40, 0.12);
  --color-exchange-binance: #e5b000; /* Binance yellow (toned) */
  --color-exchange-bithumb: #d95a2a; /* Bithumb orange (toned) */

  /* Brand & state */
  --color-primary: #0d6efd;
  --color-success: #198754;
  --color-danger: #dc3545;
  --color-warning: #ffc107;
  --color-info: #0dcaf0;

  /* Page-specific accents */
  --login-grad-1: #667eea;
  --login-grad-2: #764ba2;

  /* Effects */
  --shadow-card: 0 6px 20px rgba(16, 24, 40, 0.06);

  /* Surfaces for subtle states */
  --surface-hover: rgba(16, 24, 40, 0.04);
  --surface-alt: rgba(16, 24, 40, 0.02);

  color-scheme: light;
}

[data-theme="dark"] {
  --color-bg: #0e1117;
  --color-text: #e6edf3;
  --color-text-muted: #9aa4b2;
  --color-border: #273043;
  --color-elevated: #11161d;
  --color-sidebar-bg: #0f141a;
  --color-nav-bg: #0f141a;
  --color-nav-text: #e6edf3;
  --color-table-header-bg: #141a22;
  --color-overlay: rgba(0, 0, 0, 0.5);
  --color-grid: rgba(255, 255, 255, 0.2);

  /* Sidebar section accents */
  --color-sidebar-section-bg: rgba(255, 255, 255, 0.06);
  --color-sidebar-divider: rgba(255, 255, 255, 0.14);
  --color-exchange-binance: #f4c644; /* Slightly brighter for dark */
  --color-exchange-bithumb: #ff804f;

  /* Brand & state (slightly tuned for dark) */
  --color-primary: #8ab4ff;
  --color-success: #3fbf7f;
  --color-danger: #ff6b6b;
  --color-warning: #ffcf5c;
  --color-info: #6cd3ff;

  /* Page-specific accents */
  --login-grad-1: #1f2a44;
  --login-grad-2: #3a2756;

  --shadow-card: 0 6px 20px rgba(0, 0, 0, 0.25);

  /* Surfaces for subtle states */
  --surface-hover: rgba(255, 255, 255, 0.08);
  --surface-alt: rgba(255, 255, 255, 0.05);

  color-scheme: dark;
}

/* Base */
html, body {
  background: var(--color-bg);
  color: var(--color-text);
}

a { color: var(--color-primary); }

/* Navbar */
.navbar {
  background: var(--color-nav-bg) !important;
  color: var(--color-nav-text) !important;
}
.navbar .navbar-brand { color: var(--color-primary) !important; font-weight: 600; }
[data-theme="dark"] .navbar-toggler-icon { filter: invert(1) contrast(.85); }

/* Sidebar */
.sidebar {
  background-color: var(--color-sidebar-bg) !important;
  border-right: 1px solid var(--color-border);
}
.sidebar .nav-link { color: var(--color-text); }
.sidebar .nav-link.active { background-color: var(--color-primary); color: #fff; }

/* Sidebar sections for exchange grouping */
.sidebar-section {
  /* Subtle background and rounding for clear grouping */
  background: var(--color-sidebar-section-bg);
  border-radius: .5rem;
  padding: .25rem .25rem .5rem;
  margin: .25rem .5rem .5rem;
}
.sidebar-section-header {
  /* Small uppercase label with left accent bar */
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-muted);
  position: relative;
  padding-left: .75rem;
  margin: .5rem .25rem .25rem;
}
.sidebar-section-header::before {
  content: '';
  position: absolute;
  left: 0;
  top: .15rem;
  bottom: .15rem;
  width: 3px;
  background: var(--accent, var(--color-sidebar-divider));
  border-radius: 2px;
}
.sidebar-divider {
  border-top: 1px solid var(--color-sidebar-divider);
  margin: .75rem .5rem;
  opacity: 1;
}
.text-accent { color: var(--accent) !important; }

/* Cards */
.card { background: var(--color-elevated); box-shadow: var(--shadow-card); border-color: var(--color-border); }
.card .card-title, .card h5 { color: var(--color-text); }
.card .text-muted { color: var(--color-text-muted) !important; }

/* Tables */
/* Ensure Bootstrap table variables align with theme tokens */
.table {
  --bs-table-bg: transparent; /* avoid white cells in dark mode */
  --bs-table-color: var(--color-text);
  --bs-table-border-color: var(--color-border);
  --bs-table-hover-bg: var(--surface-hover);
  --bs-table-striped-bg: var(--surface-alt);
  color: var(--color-text);
  background: transparent;
}
.table > :not(caption) > * > * { background-color: transparent; }
.table th { background-color: var(--color-table-header-bg); color: var(--color-text); }
.table td, .table th { border-color: var(--color-border); }
.table-hover tbody tr:hover { background-color: var(--surface-hover); }
.table-striped > tbody > tr:nth-of-type(odd) { background-color: var(--surface-alt); }

/* Overlay for mobile sidebar */
.sidebar-overlay { background-color: var(--color-overlay); }

/* Utility */
.text-primary { color: var(--color-primary) !important; }
.text-success { color: var(--color-success) !important; }
.text-danger  { color: var(--color-danger) !important; }
.text-info    { color: var(--color-info) !important; }
.text-muted, .form-text { color: var(--color-text-muted) !important; }
label.form-label, h1, h2, h3, h4, h5, h6 { color: var(--color-text); }

/* Smooth theme transition (avoid during initial paint via inline pre-init) */
* { transition: color 150ms ease, background-color 150ms ease, border-color 150ms ease; }

/* Forms: inputs, selects, groups */
.form-control, .form-select { background: var(--color-elevated); color: var(--color-text); border-color: var(--color-border); }
.form-control::placeholder { color: var(--color-text-muted); }
.form-control:focus, .form-select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 0.2rem color-mix(in srgb, var(--color-primary) 25%, transparent);
}
.input-group-text { background: var(--color-elevated); border-color: var(--color-border); color: var(--color-text); }
.form-check-input { background-color: var(--color-bg); border-color: var(--color-border); }
.form-check-input:checked { background-color: var(--color-primary); border-color: var(--color-primary); }

/* Ensure checkbox/switch labels stay readable in both themes */
.form-check-label { color: var(--color-text); }

/* Larger switch variant for better tap targets on mobile */
/* Usage: add `form-switch-lg` to `.form-switch` container */
.form-switch.form-switch-lg .form-check-input {
  width: 3em;
  height: 1.5em;
  background-size: contain;
}
.form-switch.form-switch-lg .form-check-label {
  font-size: 1rem;
}

/* Outline buttons: ensure sufficient contrast in both themes */
.btn-outline-primary { color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline-primary:hover { background-color: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.btn-outline-success { color: var(--color-success); border-color: var(--color-success); }
.btn-outline-success:hover { background-color: var(--color-success); color: #fff; border-color: var(--color-success); }
.btn-outline-danger { color: var(--color-danger); border-color: var(--color-danger); }
.btn-outline-danger:hover { background-color: var(--color-danger); color: #fff; border-color: var(--color-danger); }
.btn-outline-info { color: var(--color-info); border-color: var(--color-info); }
.btn-outline-info:hover { background-color: var(--color-info); color: #0b1220; border-color: var(--color-info); }
.btn-outline-warning { color: var(--color-warning); border-color: var(--color-warning); }
.btn-outline-warning:hover { background-color: var(--color-warning); color: #0b1220; border-color: var(--color-warning); }
.btn-outline-secondary { color: var(--color-text); border-color: var(--color-border); }
.btn-outline-secondary:hover { background-color: var(--surface-hover); color: var(--color-text); border-color: var(--color-border); }