/* ==========================================================================
   SpotBook Design Tokens
   Unified source of truth for the entire design system.
   Import this file FIRST in any layout / page.
   ========================================================================== */

:root {
  /* ----- Colors: Backgrounds ----- */
  --sb-color-bg:         #0e1116;
  --sb-color-panel:      #121622;
  --sb-color-panel-2:    #171b29;

  /* ----- Colors: Text / Ink ----- */
  --sb-color-ink:        #e6e8ef;
  --sb-color-ink-muted:  #9aa3b2;

  /* ----- Colors: Borders ----- */
  --sb-color-bd:         #23293a;

  /* ----- Colors: Brand / Accent ----- */
  --sb-color-brand:      #3b82f6;
  --sb-color-brand-ink:  #ffffff;
  --sb-color-accent:     #3b82f6;
  --sb-color-accent-soft:  rgba(59, 130, 246, 0.18);
  --sb-color-accent-border: rgba(59, 130, 246, 0.35);

  /* ----- Colors: Semantic ----- */
  --sb-color-success:    #10b981;
  --sb-color-warning:    #f59e0b;
  --sb-color-danger:     #ef4444;
  --sb-color-muted:      #64748b;

  /* ----- Colors: Semantic soft (backgrounds for badges / toasts) ----- */
  --sb-color-success-soft:  rgba(16, 185, 129, 0.14);
  --sb-color-warning-soft:  rgba(245, 158, 11, 0.14);
  --sb-color-danger-soft:   rgba(239, 68, 68, 0.14);
  --sb-color-muted-soft:    rgba(100, 116, 139, 0.14);

  /* ----- Typography: Font Family ----- */
  --sb-font-family:      'Rubik', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --sb-font-mono:        'Fira Code', 'Cascadia Code', ui-monospace, SFMono-Regular, Consolas, monospace;

  /* ----- Typography: Font Sizes ----- */
  --sb-font-xs:   11px;
  --sb-font-sm:   13px;
  --sb-font-base: 15px;
  --sb-font-lg:   17px;
  --sb-font-xl:   20px;
  --sb-font-2xl:  24px;
  --sb-font-3xl:  32px;

  /* ----- Typography: Font Weights ----- */
  --sb-weight-normal:    400;
  --sb-weight-medium:    500;
  --sb-weight-semibold:  600;
  --sb-weight-bold:      700;
  --sb-weight-black:     900;

  /* ----- Typography: Line Heights ----- */
  --sb-leading-tight:    1.2;
  --sb-leading-normal:   1.5;
  --sb-leading-relaxed:  1.65;

  /* ----- Spacing Scale ----- */
  --sb-space-xs:   4px;
  --sb-space-sm:   8px;
  --sb-space-md:   12px;
  --sb-space-lg:   16px;
  --sb-space-xl:   24px;
  --sb-space-2xl:  32px;
  --sb-space-3xl:  48px;

  /* ----- Border Radius ----- */
  --sb-radius-sm:   6px;
  --sb-radius-md:   8px;
  --sb-radius-lg:   12px;
  --sb-radius-xl:   16px;
  --sb-radius-pill:  999px;

  /* ----- Shadows ----- */
  --sb-shadow-sm:  0 2px 8px rgba(0, 0, 0, 0.20);
  --sb-shadow-md:  0 10px 30px rgba(0, 0, 0, 0.35);
  --sb-shadow-lg:  0 18px 60px rgba(0, 0, 0, 0.45);

  /* ----- Transitions ----- */
  --sb-ease-fast:    150ms ease;
  --sb-ease-normal:  250ms ease;
  --sb-ease-slow:    400ms ease;

  /* ----- Z-Index Scale ----- */
  --sb-z-dropdown:  100;
  --sb-z-modal:     200;
  --sb-z-toast:     300;
  --sb-z-overlay:   400;

  /* ----- Layout ----- */
  --sb-max-width:  1200px;

  /* ===================================================================
     Back-compat aliases:
     These map old variable names (--bg, --panel, etc.) to the unified
     tokens above so existing CSS files keep working without edits.
     =================================================================== */
  --bg:         var(--sb-color-bg);
  --panel:      var(--sb-color-panel);
  --panel-2:    var(--sb-color-panel-2);
  --ink:        var(--sb-color-ink);
  --ink-muted:  var(--sb-color-ink-muted);
  --bd:         var(--sb-color-bd);
  --brand:      var(--sb-color-brand);
  --brand-ink:  var(--sb-color-brand-ink);
  --success:    var(--sb-color-success);
  --warning:    var(--sb-color-warning);
  --danger:     var(--sb-color-danger);
  --radius:     var(--sb-radius-xl);
  --shadow:     var(--sb-shadow-md);
  --max:        var(--sb-max-width);
}


/* ==========================================================================
   Skeleton / Shimmer loading animation
   Usage: <div class="sb-skeleton" style="--sb-skel-h: 16px"></div>
          or use the .sb-skeleton-text, .sb-skeleton-heading, .sb-skeleton-avatar helpers.
   ========================================================================== */

@keyframes sb-shimmer {
  0%   { background-position: -400px 0; }
  100% { background-position: 400px 0; }
}

.sb-skeleton {
  display: block;
  height: var(--sb-skel-h, 14px);
  width: var(--sb-skel-w, 100%);
  border-radius: var(--sb-radius-sm);
  background: linear-gradient(
    90deg,
    rgba(255, 255, 255, 0.04) 0%,
    rgba(255, 255, 255, 0.10) 40%,
    rgba(255, 255, 255, 0.04) 80%
  );
  background-size: 800px 100%;
  animation: sb-shimmer 1.6s ease-in-out infinite;
  pointer-events: none;
  user-select: none;
}

/* Preset skeleton sizes */
.sb-skeleton-text {
  --sb-skel-h: 14px;
  --sb-skel-w: 100%;
}

.sb-skeleton-heading {
  --sb-skel-h: 22px;
  --sb-skel-w: 60%;
}

.sb-skeleton-avatar {
  --sb-skel-h: 40px;
  --sb-skel-w: 40px;
  border-radius: var(--sb-radius-pill);
}

.sb-skeleton-card {
  --sb-skel-h: 120px;
  --sb-skel-w: 100%;
  border-radius: var(--sb-radius-lg);
}

/* Skeleton line group helper */
.sb-skeleton-lines {
  display: flex;
  flex-direction: column;
  gap: var(--sb-space-sm);
}

.sb-skeleton-lines .sb-skeleton:last-child {
  width: 70%;
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .sb-skeleton {
    animation: none;
  }
}


/* ==========================================================================
   Component: Card (.sb-card)
   Matches the _card.eta partial.
   ========================================================================== */

.sb-card {
  background: rgba(18, 22, 34, 0.78);
  border: 1px solid var(--sb-color-bd);
  border-radius: var(--sb-radius-xl);
  box-shadow: var(--sb-shadow-sm);
  overflow: hidden;
}

.sb-card__header {
  display: flex;
  align-items: center;
  gap: var(--sb-space-sm);
  padding: var(--sb-space-lg);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sb-card__icon {
  font-size: var(--sb-font-xl);
  line-height: 1;
  flex: 0 0 auto;
}

.sb-card__title {
  margin: 0;
  font-size: var(--sb-font-lg);
  font-weight: var(--sb-weight-bold);
  color: var(--sb-color-ink);
}

.sb-card__body {
  padding: var(--sb-space-lg);
}

.sb-card__footer {
  padding: var(--sb-space-md) var(--sb-space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--sb-color-ink-muted);
  font-size: var(--sb-font-sm);
}


/* ==========================================================================
   Component: Button (.sb-btn)
   Matches the _btn.eta partial.
   ========================================================================== */

.sb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--sb-space-sm);
  padding: 10px 16px;
  border-radius: var(--sb-radius-pill);
  border: 1px solid var(--sb-color-bd);
  background: transparent;
  color: var(--sb-color-ink);
  font-family: var(--sb-font-family);
  font-size: var(--sb-font-base);
  font-weight: var(--sb-weight-bold);
  line-height: 1;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--sb-ease-fast),
              border-color var(--sb-ease-fast),
              transform var(--sb-ease-fast),
              box-shadow var(--sb-ease-fast);
  user-select: none;
  white-space: nowrap;
}

.sb-btn:hover {
  background: rgba(255, 255, 255, 0.06);
}

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

.sb-btn:disabled,
.sb-btn[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.sb-btn__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  font-size: var(--sb-font-lg);
  line-height: 1;
}

.sb-btn__text {
  flex: 0 0 auto;
}

/* -- Primary -- */
.sb-btn--primary {
  background: var(--sb-color-brand);
  border-color: transparent;
  color: var(--sb-color-brand-ink);
  box-shadow: 0 6px 18px rgba(59, 130, 246, 0.35);
}

.sb-btn--primary:hover {
  filter: brightness(1.08);
  background: var(--sb-color-brand);
}

/* -- Secondary (default) -- */
.sb-btn--secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--sb-color-bd);
}

.sb-btn--secondary:hover {
  background: rgba(255, 255, 255, 0.08);
}

/* -- Ghost -- */
.sb-btn--ghost {
  background: transparent;
  border-color: transparent;
}

.sb-btn--ghost:hover {
  background: rgba(255, 255, 255, 0.06);
}

/* -- Danger -- */
.sb-btn--danger {
  background: var(--sb-color-danger-soft);
  border-color: rgba(239, 68, 68, 0.35);
  color: #fca5a5;
}

.sb-btn--danger:hover {
  background: rgba(239, 68, 68, 0.22);
}

/* -- Icon-only -- */
.sb-btn--icon-only {
  padding: 10px;
  border-radius: var(--sb-radius-lg);
  min-width: 40px;
  min-height: 40px;
}


/* ==========================================================================
   Component: Empty State (.sb-empty-state)
   Matches the _empty_state.eta partial.
   ========================================================================== */

.sb-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--sb-space-3xl) var(--sb-space-xl);
  border: 1px dashed rgba(148, 163, 184, 0.25);
  border-radius: var(--sb-radius-xl);
  background: rgba(15, 23, 42, 0.25);
}

.sb-empty-state__icon {
  font-size: 48px;
  line-height: 1;
  margin-bottom: var(--sb-space-lg);
  opacity: 0.7;
}

.sb-empty-state__message {
  margin: 0;
  font-size: var(--sb-font-lg);
  font-weight: var(--sb-weight-semibold);
  color: var(--sb-color-ink);
}

.sb-empty-state__sub {
  margin: var(--sb-space-sm) 0 0;
  font-size: var(--sb-font-sm);
  color: var(--sb-color-ink-muted);
  max-width: 360px;
}

.sb-empty-state__cta {
  margin-top: var(--sb-space-xl);
}


/* ==========================================================================
   Component: Toast (.sb-toast)
   Matches the _toast.eta partial.
   ========================================================================== */

.sb-toast {
  display: flex;
  align-items: center;
  gap: var(--sb-space-md);
  padding: var(--sb-space-md) var(--sb-space-lg);
  border-radius: var(--sb-radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.10);
  background: var(--sb-color-panel);
  color: var(--sb-color-ink);
  font-size: var(--sb-font-sm);
  box-shadow: var(--sb-shadow-md);
  z-index: var(--sb-z-toast);
  animation: sb-toast-in 250ms ease forwards;
}

@keyframes sb-toast-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.sb-toast__icon {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--sb-radius-pill);
  font-size: var(--sb-font-sm);
  font-weight: var(--sb-weight-bold);
}

.sb-toast__message {
  flex: 1;
  min-width: 0;
}

.sb-toast__close {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border: none;
  background: transparent;
  color: var(--sb-color-ink-muted);
  font-size: 18px;
  cursor: pointer;
  border-radius: var(--sb-radius-sm);
  transition: background var(--sb-ease-fast);
}

.sb-toast__close:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--sb-color-ink);
}

/* Toast variants */
.sb-toast--success {
  border-color: rgba(16, 185, 129, 0.35);
  background: linear-gradient(90deg, var(--sb-color-success-soft), var(--sb-color-panel));
}

.sb-toast--success .sb-toast__icon {
  background: var(--sb-color-success-soft);
  color: var(--sb-color-success);
}

.sb-toast--warning {
  border-color: rgba(245, 158, 11, 0.35);
  background: linear-gradient(90deg, var(--sb-color-warning-soft), var(--sb-color-panel));
}

.sb-toast--warning .sb-toast__icon {
  background: var(--sb-color-warning-soft);
  color: var(--sb-color-warning);
}

.sb-toast--danger {
  border-color: rgba(239, 68, 68, 0.35);
  background: linear-gradient(90deg, var(--sb-color-danger-soft), var(--sb-color-panel));
}

.sb-toast--danger .sb-toast__icon {
  background: var(--sb-color-danger-soft);
  color: var(--sb-color-danger);
}

.sb-toast--info {
  border-color: rgba(59, 130, 246, 0.35);
  background: linear-gradient(90deg, var(--sb-color-accent-soft), var(--sb-color-panel));
}

.sb-toast--info .sb-toast__icon {
  background: var(--sb-color-accent-soft);
  color: var(--sb-color-accent);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  .sb-toast {
    animation: none;
  }
}