/* ============================================================
  Design Tokens — RestaOps
   ============================================================
   Single source of truth for all colors, spacing, typography,
   and component styles across the entire platform.
   
   Import this file FIRST in every page that needs brand consistency.
   ============================================================ */

:root {
  /* ── Brand Colors ── */
  --brand-primary: #16a34a;
  --brand-primary-dark: #15803d;
  --brand-primary-light: #4ade80;
  --brand-secondary: #0f766e;
  --brand-accent: #22c55e;
  --brand-accent-light: #86efac;
  --brand-gradient: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-secondary) 100%);
  --brand-gradient-accent: linear-gradient(135deg, var(--brand-accent) 0%, var(--brand-accent-light) 100%);

  /* ── Neutral Palette ── */
  --gray-50:  #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* ── Semantic Colors ── */
  --color-success: #10b981;
  --color-success-bg: rgba(16, 185, 129, 0.1);
  --color-warning: #f59e0b;
  --color-warning-bg: rgba(245, 158, 11, 0.1);
  --color-danger: #ef4444;
  --color-danger-bg: rgba(239, 68, 68, 0.1);
  --color-info: #3b82f6;
  --color-info-bg: rgba(59, 130, 246, 0.1);

  /* ── Dark Theme Tokens ── */
  --dark-bg: #0b1020;
  --dark-card: #111827;
  --dark-card-hover: #1a2332;
  --dark-border: rgba(255, 255, 255, 0.1);
  --dark-text: #f1f5f9;
  --dark-text-muted: rgba(241, 245, 249, 0.65);

  /* ── Typography ── */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  --text-xs:   0.75rem;   /* 12px */
  --text-sm:   0.875rem;  /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg:   1.125rem;  /* 18px */
  --text-xl:   1.25rem;   /* 20px */
  --text-2xl:  1.5rem;    /* 24px */
  --text-3xl:  1.875rem;  /* 30px */
  --text-4xl:  2.25rem;   /* 36px */

  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;
  --font-extrabold: 800;

  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;

  /* ── Spacing Scale ── */
  --space-1: 0.25rem;     /* 4px */
  --space-2: 0.5rem;      /* 8px */
  --space-3: 0.75rem;     /* 12px */
  --space-4: 1rem;        /* 16px */
  --space-5: 1.25rem;     /* 20px */
  --space-6: 1.5rem;      /* 24px */
  --space-8: 2rem;        /* 32px */
  --space-10: 2.5rem;     /* 40px */
  --space-12: 3rem;       /* 48px */
  --space-16: 4rem;       /* 64px */

  /* ── Border Radius ── */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-full: 9999px;

  /* ── Shadows ── */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 50px rgba(0, 0, 0, 0.18);

  /* ── Transitions ── */
  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* ── Z-Index Scale ── */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 500;
  --z-modal: 1000;
  --z-toast: 2000;
  --z-tooltip: 3000;

  /* ── Component: Minimum touch target ── */
  --touch-target: 44px;
}

/* ============================================================
   Shared Component Styles
   ============================================================ */

/* ── Toast / Snackbar Notification ── */
.fnb-toast-container {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: var(--z-toast);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
  max-width: 400px;
}

.fnb-toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-family: var(--font-family);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  line-height: var(--leading-snug);
  color: #fff;
  background: var(--gray-800);
  box-shadow: var(--shadow-lg);
  pointer-events: auto;
  transform: translateX(120%);
  opacity: 0;
  transition: transform var(--duration-normal) var(--ease-bounce),
              opacity var(--duration-fast) ease;
  will-change: transform, opacity;
}
.fnb-toast.show {
  transform: translateX(0);
  opacity: 1;
}
.fnb-toast.hide {
  transform: translateX(120%);
  opacity: 0;
}
.fnb-toast--success { background: var(--color-success); }
.fnb-toast--error   { background: var(--color-danger); }
.fnb-toast--warning { background: #d97706; }
.fnb-toast--info    { background: var(--color-info); }

.fnb-toast-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}
.fnb-toast-message { flex: 1; }
.fnb-toast-close {
  flex-shrink: 0;
  background: none;
  border: none;
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  padding: var(--space-1);
  font-size: var(--text-lg);
  line-height: 1;
}
.fnb-toast-close:hover { color: #fff; }

/* ── Skeleton Loading ── */
@keyframes fnb-shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
.fnb-skeleton {
  background: linear-gradient(90deg,
    var(--gray-200) 25%,
    var(--gray-100) 50%,
    var(--gray-200) 75%
  );
  background-size: 200% 100%;
  animation: fnb-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}
/* Dark theme skeleton */
.dark .fnb-skeleton,
[data-theme="dark"] .fnb-skeleton {
  background: linear-gradient(90deg,
    rgba(255,255,255,0.06) 25%,
    rgba(255,255,255,0.1) 50%,
    rgba(255,255,255,0.06) 75%
  );
  background-size: 200% 100%;
}

.fnb-skeleton-text {
  height: 14px;
  margin-bottom: 8px;
}
.fnb-skeleton-text:last-child {
  width: 60%;
}
.fnb-skeleton-card {
  height: 200px;
  border-radius: var(--radius-lg);
}
.fnb-skeleton-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
}

/* ── Confirmation Dialog ── */
.fnb-dialog-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-normal) ease, visibility var(--duration-normal) ease;
}
.fnb-dialog-overlay.active {
  opacity: 1;
  visibility: visible;
}

.fnb-dialog {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  max-width: 420px;
  width: 100%;
  box-shadow: var(--shadow-xl);
  transform: scale(0.9) translateY(10px);
  transition: transform var(--duration-normal) var(--ease-bounce);
}
.fnb-dialog-overlay.active .fnb-dialog {
  transform: scale(1) translateY(0);
}
.fnb-dialog-title {
  font-family: var(--font-family);
  font-size: var(--text-lg);
  font-weight: var(--font-bold);
  color: var(--gray-900);
  margin: 0 0 var(--space-2);
}
.fnb-dialog-message {
  font-family: var(--font-family);
  font-size: var(--text-sm);
  color: var(--gray-600);
  margin: 0 0 var(--space-6);
  line-height: var(--leading-relaxed);
}
.fnb-dialog-actions {
  display: flex;
  gap: var(--space-3);
  justify-content: flex-end;
}

/* ── Shared Button Styles ── */
.fnb-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-family);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  line-height: 1;
  padding: var(--space-3) var(--space-5);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  min-height: var(--touch-target);
  transition: all var(--duration-fast) var(--ease-default);
  text-decoration: none;
  white-space: nowrap;
}
.fnb-btn:active { transform: scale(0.97); }

.fnb-btn-primary {
  background: var(--brand-gradient);
  color: #fff;
  box-shadow: 0 2px 8px rgba(102, 126, 234, 0.35);
}
.fnb-btn-primary:hover {
  box-shadow: 0 4px 16px rgba(102, 126, 234, 0.5);
  filter: brightness(1.05);
}

.fnb-btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
}
.fnb-btn-secondary:hover {
  background: var(--gray-200);
}

.fnb-btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.fnb-btn-danger:hover {
  background: #dc2626;
}

.fnb-btn-ghost {
  background: transparent;
  color: var(--brand-primary);
  border: 1px solid var(--gray-200);
}
.fnb-btn-ghost:hover {
  background: var(--gray-50);
  border-color: var(--brand-primary);
}

.fnb-btn-sm {
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-3);
  min-height: 36px;
}
.fnb-btn-lg {
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-8);
  min-height: 52px;
}

/* Loading spinner inside buttons */
.fnb-btn .fnb-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: fnb-spin 0.6s linear infinite;
}
@keyframes fnb-spin {
  to { transform: rotate(360deg); }
}

/* ── Badge ── */
.fnb-badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  border-radius: var(--radius-full);
  line-height: 1.5;
}
.fnb-badge-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}
.fnb-badge-warning {
  background: var(--color-warning-bg);
  color: #b45309;
}
.fnb-badge-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}
.fnb-badge-info {
  background: var(--color-info-bg);
  color: var(--color-info);
}

/* ── Input Fields ── */
.fnb-input {
  font-family: var(--font-family);
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-4);
  border: 1.5px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--gray-900);
  width: 100%;
  min-height: var(--touch-target);
  transition: border-color var(--duration-fast) ease, box-shadow var(--duration-fast) ease;
  outline: none;
}
.fnb-input:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}
.fnb-input::placeholder {
  color: var(--gray-400);
}

/* ── Safe Area for Mobile (notch devices) ── */
@supports (padding-top: env(safe-area-inset-top)) {
  .fnb-safe-top    { padding-top:    env(safe-area-inset-top); }
  .fnb-safe-bottom { padding-bottom: env(safe-area-inset-bottom); }
  .fnb-safe-left   { padding-left:   env(safe-area-inset-left); }
  .fnb-safe-right  { padding-right:  env(safe-area-inset-right); }
}

/* ── Scrollbar (Webkit) ── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--gray-300); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--gray-400); }

/* ── Utility: Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  .fnb-toast,
  .fnb-dialog,
  .fnb-skeleton,
  .fnb-btn .fnb-spinner {
    animation: none !important;
    transition-duration: 0.01ms !important;
  }
}