/* ============================================================
   BASE STYLES — Resets, typography, utilities
   ============================================================ */

/* --- Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

button { cursor: pointer; }

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}
a:hover { color: var(--color-primary-dark); }

ul, ol { list-style: none; }

table {
  border-collapse: collapse;
  width: 100%;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: var(--fw-semibold);
  line-height: var(--lh-tight);
  color: var(--color-text-primary);
}
h1 { font-size: var(--fs-3xl); }
h2 { font-size: var(--fs-2xl); }
h3 { font-size: var(--fs-xl); }
h4 { font-size: var(--fs-lg); }

/* --- Form Elements --- */
.form-group {
  margin-bottom: var(--space-4);
}
.form-label {
  display: block;
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
}
.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 10px 14px;
  font-size: var(--fs-base);
  border: 1px solid #cbd5e1;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text-primary);
  transition: border-color var(--duration-fast) var(--ease-default), box-shadow var(--duration-fast) var(--ease-default), background-color var(--duration-fast) var(--ease-default);
}
.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: #94a3b8;
}
.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-primary) 15%, transparent);
}
.form-input:disabled {
  background: var(--color-bg);
  opacity: 0.7;
  cursor: not-allowed;
}
.form-textarea {
  min-height: 100px;
  resize: vertical;
}
.form-hint {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}
.form-error {
  font-size: var(--fs-xs);
  color: var(--color-danger);
  margin-top: var(--space-1);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-default);
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}
.btn:hover {
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.08);
}
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-focus-ring);
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-text-inverse);
}
.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-dark);
}

.btn-success {
  background: var(--color-success);
  color: var(--color-text-inverse);
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
}
.btn-danger:hover:not(:disabled) {
  background: #dc2626;
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text-primary);
}
.btn-outline:hover:not(:disabled) {
  background: var(--color-bg);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg);
  color: var(--color-text-primary);
}

.btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--fs-sm);
}
.btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--fs-md);
}

/* --- Badge / Status --- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 600;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
  line-height: 1;
}
.badge-active {
  background: #f0fdf4;
  color: #16a34a;
  border-color: #bbf7d0;
}
.badge-used {
  background: #f8fafc;
  color: #475569;
  border-color: #e2e8f0;
}
.badge-cancelled {
  background: #fef2f2;
  color: #dc2626;
  border-color: #fecaca;
}
.badge-warning {
  background: #fffbeb;
  color: #d97706;
  border-color: #fef3c7;
}

/* --- Card --- */
.card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
  border: 1px solid var(--color-border-light);
  transition: border-color var(--duration-normal) var(--ease-default), box-shadow var(--duration-normal) var(--ease-default);
}
.card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--color-border);
}
.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}
.card-title {
  font-size: var(--fs-lg);
  font-weight: var(--fw-semibold);
}

/* --- Table --- */
.data-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}
.data-table th {
  font-size: 11px;
  font-weight: 600;
  color: #64748b;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: #f8fafc;
  border-bottom: 2px solid #e2e8f0;
  padding: 12px 16px;
}
.data-table td {
  padding: 14px 16px;
  font-size: var(--fs-base);
  color: var(--color-text-primary);
  border-bottom: 1px solid #f1f5f9;
  transition: box-shadow var(--duration-fast) var(--ease-default);
}
.data-table tbody tr {
  transition: background-color var(--duration-fast) var(--ease-default);
}
.data-table tbody tr:hover {
  background: #f8fafc;
}
.data-table tbody tr:hover td:first-child {
  box-shadow: inset 3px 0 0 0 var(--color-primary);
}


/* --- Alert / Flash --- */
.alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  margin-bottom: var(--space-4);
  border: 1px solid;
  animation: alertSlideIn var(--duration-normal) var(--ease-out);
}
@keyframes alertSlideIn {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}
.alert-success {
  background: rgba(34,197,94,0.08);
  border-color: rgba(34,197,94,0.25);
  color: #16a34a;
}
.alert-error {
  background: rgba(239,68,68,0.08);
  border-color: rgba(239,68,68,0.25);
  color: #dc2626;
}
.alert-warning {
  background: rgba(245,158,11,0.08);
  border-color: rgba(245,158,11,0.25);
  color: #d97706;
}
.alert-info {
  background: rgba(59,130,246,0.08);
  border-color: rgba(59,130,246,0.25);
  color: #2563eb;
}

/* --- Utilities --- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-danger { color: var(--color-danger); }
.text-warning { color: var(--color-warning); }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.hidden { display: none !important; }

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