/* ==================================================
   BBF Mobile Design System
   Shared tokens and primitives for all mobile modules
   ================================================== */

:root {
  /* Brand and semantic colors */
  --ui-accent: #e07a5f;
  --ui-accent-hover: #c9684f;
  --ui-accent-soft: rgba(224, 122, 95, 0.12);
  --ui-success: #16a34a;
  --ui-success-soft: #f0fdf4;
  --ui-warning: #d97706;
  --ui-warning-soft: #fffbeb;
  --ui-danger: #dc2626;
  --ui-danger-soft: #fef2f2;

  /* Surfaces and text */
  --ui-bg: #f5f7fb;
  --ui-surface: #ffffff;
  --ui-surface-muted: #f8fafc;
  --ui-text: #172033;
  --ui-text-muted: #64748b;
  --ui-border: #e2e8f0;
  --ui-focus: #2563eb;

  /* Shape, spacing and depth */
  --ui-radius-sm: 10px;
  --ui-radius-md: 14px;
  --ui-radius-lg: 18px;
  --ui-shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
  --ui-shadow-md: 0 6px 20px rgba(15, 23, 42, 0.08);
  --ui-shadow-float: 0 12px 30px rgba(15, 23, 42, 0.16);
  --ui-control-height: 44px;
  --ui-transition: 160ms cubic-bezier(.2, 0, 0, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    --ui-bg: #0f172a;
    --ui-surface: #1e293b;
    --ui-surface-muted: #172033;
    --ui-text: #f1f5f9;
    --ui-text-muted: #94a3b8;
    --ui-border: #334155;
    --ui-success-soft: rgba(22, 163, 74, 0.14);
    --ui-warning-soft: rgba(217, 119, 6, 0.14);
    --ui-danger-soft: rgba(220, 38, 38, 0.14);
    --ui-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.24);
    --ui-shadow-md: 0 8px 24px rgba(0, 0, 0, 0.28);
    --ui-shadow-float: 0 14px 34px rgba(0, 0, 0, 0.38);
  }
}

/* Accessible focus shared by links, buttons and form controls. */
:where(a, button, input, select, textarea, [tabindex]):focus-visible {
  outline: 3px solid color-mix(in srgb, var(--ui-focus) 38%, transparent);
  outline-offset: 2px;
}

/* Shared surface primitive. */
.ui-card {
  background: var(--ui-surface);
  color: var(--ui-text);
  border: 1px solid var(--ui-border);
  border-radius: var(--ui-radius-lg);
  box-shadow: var(--ui-shadow-sm);
}

/* Shared mobile button primitive. Module containers may override --ui-accent. */
.ui-btn {
  min-height: var(--ui-control-height);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid transparent;
  border-radius: var(--ui-radius-md);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.1;
  text-decoration: none;
  white-space: nowrap;
  cursor: pointer;
  transition: transform var(--ui-transition), background-color var(--ui-transition),
              border-color var(--ui-transition), color var(--ui-transition),
              box-shadow var(--ui-transition);
  -webkit-tap-highlight-color: transparent;
}

.ui-btn:hover { text-decoration: none; }
.ui-btn:active { transform: scale(0.97); }
.ui-btn:disabled,
.ui-btn[aria-disabled="true"] { opacity: 0.52; cursor: not-allowed; transform: none; }

.ui-btn-primary {
  background: var(--ui-accent);
  border-color: var(--ui-accent);
  color: #ffffff;
  box-shadow: 0 4px 12px color-mix(in srgb, var(--ui-accent) 25%, transparent);
}
.ui-btn-primary:hover { background: var(--ui-accent-hover); border-color: var(--ui-accent-hover); color: #fff; }

.ui-btn-secondary {
  background: var(--ui-surface);
  border-color: color-mix(in srgb, var(--ui-accent) 42%, var(--ui-border));
  color: var(--ui-accent);
  box-shadow: var(--ui-shadow-sm);
}
.ui-btn-secondary:hover { background: var(--ui-accent-soft); color: var(--ui-accent-hover); }

.ui-btn-ghost {
  background: transparent;
  border-color: var(--ui-border);
  color: var(--ui-text);
}
.ui-btn-ghost:hover { background: var(--ui-surface-muted); }

.ui-btn-success { background: var(--ui-success-soft); border-color: color-mix(in srgb, var(--ui-success) 25%, var(--ui-border)); color: var(--ui-success); }
.ui-btn-danger { background: var(--ui-danger-soft); border-color: color-mix(in srgb, var(--ui-danger) 25%, var(--ui-border)); color: var(--ui-danger); }
.ui-btn-warning { background: var(--ui-warning-soft); border-color: color-mix(in srgb, var(--ui-warning) 25%, var(--ui-border)); color: var(--ui-warning); }

.ui-btn-sm { min-height: 36px; padding: 7px 12px; border-radius: var(--ui-radius-sm); font-size: 0.75rem; }
.ui-btn-block { width: 100%; }
.ui-btn-icon { width: var(--ui-control-height); padding: 0; border-radius: 50%; }

.ui-action-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 10px;
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}