/**
 * =============================================================================
 * HOSPITAL FE — SHARED COMPONENT LIBRARY
 * =============================================================================
 * Reusable UI component styles — buttons, badges, cards, inputs, etc.
 * All modules should use these classes instead of defining their own.
 * Depends on: tokens.css (must load first)
 * =============================================================================
 */

/* =============================================================================
   1. BUTTONS — .dsf-btn
   ============================================================================= */
.dsf-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  line-height: var(--leading-tight);
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  transition: all var(--transition-normal);
  min-height: 36px;
  min-width: 36px; /* minimum touch target */
}

/* Primary Button */
.dsf-btn-primary {
  background-color: var(--color-accent-primary);
  border-color: var(--color-accent-primary);
  color: #ffffff;
  box-shadow: var(--shadow-xs);
}
.dsf-btn-primary:hover,
.dsf-btn-primary:focus {
  background-color: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn-hover);
  color: #ffffff;
}

/* Secondary / Outline Button */
.dsf-btn-secondary {
  background-color: transparent;
  border-color: var(--color-border-default);
  color: var(--color-text-secondary);
}
.dsf-btn-secondary:hover,
.dsf-btn-secondary:focus {
  background-color: var(--color-accent-subtle);
  border-color: var(--color-accent-primary);
  color: var(--color-text-primary);
}

/* Danger Button */
.dsf-btn-danger {
  background-color: var(--color-status-danger-bg);
  border-color: var(--color-status-danger-border);
  color: var(--color-status-danger-text);
}
.dsf-btn-danger:hover {
  background-color: var(--color-status-danger-text);
  color: #ffffff;
  transform: translateY(-1px);
}

/* Ghost Button */
.dsf-btn-ghost {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-text-secondary);
}
.dsf-btn-ghost:hover {
  background-color: var(--color-accent-subtle);
  color: var(--color-text-primary);
}

/* Button Sizes */
.dsf-btn-sm {
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-sm);
  min-height: 30px;
}
.dsf-btn-lg {
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-md);
  min-height: 44px;
}

/* Icon-only Button */
.dsf-btn-icon {
  padding: var(--space-2);
  min-width: 36px;
  min-height: 36px;
  border-radius: var(--radius-lg);
}

/* =============================================================================
   2. BADGES — .dsf-badge
   ============================================================================= */
.dsf-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border-radius: var(--radius-badge);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: capitalize;
  border: 1px solid transparent;
  white-space: nowrap;
}

.dsf-badge-success {
  background-color: var(--color-status-success-bg);
  color: var(--color-status-success-text);
  border-color: var(--color-status-success-border);
}
.dsf-badge-warning {
  background-color: var(--color-status-warning-bg);
  color: var(--color-status-warning-text);
  border-color: var(--color-status-warning-border);
}
.dsf-badge-danger {
  background-color: var(--color-status-danger-bg);
  color: var(--color-status-danger-text);
  border-color: var(--color-status-danger-border);
}
.dsf-badge-info {
  background-color: var(--color-status-info-bg);
  color: var(--color-status-info-text);
  border-color: var(--color-status-info-border);
}
.dsf-badge-neutral {
  background-color: rgba(255,255,255,0.06);
  color: var(--color-text-secondary);
  border-color: var(--color-border-default);
}

/* =============================================================================
   3. CARDS — .dsf-card
   ============================================================================= */
.dsf-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
  margin-bottom: var(--space-5);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal), border-color var(--transition-normal);
}

.dsf-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-accent);
}

.dsf-card-header {
  border-bottom: 1px solid var(--color-border-default);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.dsf-card-title {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.dsf-card-title i {
  color: var(--color-accent-primary);
  font-size: var(--text-base);
}

.dsf-card-footer {
  border-top: 1px solid var(--color-border-subtle);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
}

/* Card sizes */
.dsf-card-sm { padding: var(--space-3); }
.dsf-card-lg { padding: var(--space-8); border-radius: var(--radius-2xl); }

/* =============================================================================
   4. FORM CONTROLS — .dsf-input, .dsf-select, .dsf-textarea
   ============================================================================= */
.dsf-input,
.dsf-select,
.dsf-textarea {
  display: block;
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-base);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-input);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  min-height: 36px;
}

.dsf-input:focus,
.dsf-select:focus,
.dsf-textarea:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

.dsf-input::placeholder,
.dsf-textarea::placeholder {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
}

.dsf-input-error,
.dsf-input.error {
  border-color: var(--color-status-danger-text);
  box-shadow: 0 0 0 3px var(--color-status-danger-bg);
}

.dsf-form-group {
  margin-bottom: var(--space-4);
}

.dsf-form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-1);
  letter-spacing: var(--tracking-wide);
}

.dsf-form-error {
  font-size: var(--text-xs);
  color: var(--color-status-danger-text);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
  gap: 4px;
}

/* =============================================================================
   5. STAT CARD — for dashboards
   ============================================================================= */
.dsf-stat-card {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.dsf-stat-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent-primary);
}

.dsf-stat-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent-primary), var(--color-accent-hover));
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.dsf-stat-card:hover::after {
  opacity: 1;
}

.dsf-stat-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-icon);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent-subtle);
  border: 1px solid var(--color-border-default);
  flex-shrink: 0;
  transition: all var(--transition-normal);
}

.dsf-stat-card:hover .dsf-stat-icon {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-hover));
  transform: scale(1.08);
  box-shadow: var(--shadow-glow-sm);
}

.dsf-stat-icon i {
  font-size: 20px;
  color: var(--color-accent-primary);
  transition: color var(--transition-fast);
}

.dsf-stat-card:hover .dsf-stat-icon i {
  color: #ffffff;
}

.dsf-stat-value {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: var(--font-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
}

.dsf-stat-label {
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
}

/* =============================================================================
   6. MODAL — .dsf-modal-overlay, .dsf-modal
   ============================================================================= */
.dsf-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: var(--color-bg-overlay);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: var(--z-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dsf-modal {
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-modal);
  box-shadow: var(--shadow-modal);
  overflow: hidden;
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  z-index: var(--z-modal);
  animation: dsf-modal-slide-in var(--duration-normal) var(--ease-spring);
}

@keyframes dsf-modal-slide-in {
  from { opacity: 0; transform: scale(0.94) translateY(-12px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.dsf-modal-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  flex-shrink: 0;
}

.dsf-modal-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.dsf-modal-body {
  padding: var(--space-5) var(--space-6);
  overflow-y: auto;
  flex: 1;
}

.dsf-modal-footer {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  flex-shrink: 0;
}

/* Modal responsive sizing */
@media (min-width: 576px) { .dsf-modal { width: 90vw; max-width: 520px; } }
@media (min-width: 768px) { .dsf-modal-md { max-width: 700px; } }
@media (min-width: 992px) { .dsf-modal-lg { max-width: 900px; } }
@media (min-width: 1200px) { .dsf-modal-xl { max-width: 1140px; } }
@media (max-width: 575px) {
  .dsf-modal {
    width: 100vw;
    max-width: 100vw;
    border-radius: 0;
    height: 100dvh;
    max-height: 100dvh;
    margin: 0;
    border: none;
  }
}

/* =============================================================================
   7. DATA TABLE — .dsf-table
   ============================================================================= */
.dsf-table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-default);
}

.dsf-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-base);
}

.dsf-table thead {
  background-color: var(--color-bg-elevated);
  border-bottom: 2px solid var(--color-border-default);
}

.dsf-table thead th {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
  color: var(--color-text-secondary);
  white-space: nowrap;
  text-align: left;
}

.dsf-table tbody tr {
  border-bottom: 1px solid var(--color-border-subtle);
  transition: background-color var(--transition-fast);
}

.dsf-table tbody tr:hover {
  background-color: var(--color-accent-subtle);
}

.dsf-table tbody td {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-primary);
  vertical-align: middle;
}

/* =============================================================================
   8. SECTION HEADER — .dsf-section-header
   ============================================================================= */
.dsf-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-5);
  flex-wrap: wrap;
}

.dsf-section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: var(--font-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.dsf-section-subtitle {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 4px 0 0;
}

.dsf-section-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
}

/* =============================================================================
   9. BREADCRUMB / TAB BAR — .dsf-tabbar
   ============================================================================= */
.dsf-tabbar {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-wrap: wrap;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border-default);
  margin-bottom: var(--space-4);
}

.dsf-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--color-text-secondary);
  background-color: transparent;
  border: 1px solid var(--color-border-subtle);
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
  white-space: nowrap;
  min-height: 34px;
}

.dsf-tab:hover {
  color: var(--color-text-primary);
  background-color: var(--color-accent-subtle);
  border-color: var(--color-border-accent);
}

.dsf-tab.active,
.dsf-tab[aria-selected="true"] {
  background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-hover));
  color: #ffffff;
  border-color: var(--color-accent-primary);
  box-shadow: var(--shadow-glow-sm);
}

/* =============================================================================
   10. DIVIDERS & SEPARATORS
   ============================================================================= */
.dsf-divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-border-subtle);
  border: none;
  margin: var(--space-5) 0;
}

.dsf-divider-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin: var(--space-4) 0;
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  font-weight: var(--font-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-caps);
}

.dsf-divider-label::before,
.dsf-divider-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background-color: var(--color-border-subtle);
}

/* =============================================================================
   11. LOADING / SKELETON
   ============================================================================= */
.dsf-skeleton {
  background: linear-gradient(
    90deg,
    var(--color-bg-elevated) 25%,
    rgba(255,255,255,0.04) 50%,
    var(--color-bg-elevated) 75%
  );
  background-size: 200% 100%;
  animation: dsf-shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

@keyframes dsf-shimmer {
  0%   { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.dsf-skeleton-text { height: 14px; }
.dsf-skeleton-title { height: 20px; }
.dsf-skeleton-avatar { width: 40px; height: 40px; border-radius: var(--radius-full); }

/* =============================================================================
   12. ALERT / NOTIFICATION — .dsf-alert
   ============================================================================= */
.dsf-alert {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  font-size: var(--text-base);
}

.dsf-alert-success {
  background-color: var(--color-status-success-bg);
  border-color: var(--color-status-success-border);
  color: var(--color-status-success-text);
}
.dsf-alert-warning {
  background-color: var(--color-status-warning-bg);
  border-color: var(--color-status-warning-border);
  color: var(--color-status-warning-text);
}
.dsf-alert-danger {
  background-color: var(--color-status-danger-bg);
  border-color: var(--color-status-danger-border);
  color: var(--color-status-danger-text);
}
.dsf-alert-info {
  background-color: var(--color-status-info-bg);
  border-color: var(--color-status-info-border);
  color: var(--color-status-info-text);
}

/* =============================================================================
   13. UTILITY HELPERS
   ============================================================================= */
/* Spacing helpers that work with the token grid */
.dsf-mt-auto { margin-top: auto !important; }
.dsf-flex { display: flex !important; }
.dsf-flex-col { flex-direction: column !important; }
.dsf-items-center { align-items: center !important; }
.dsf-justify-between { justify-content: space-between !important; }
.dsf-gap-sm { gap: var(--space-2) !important; }
.dsf-gap-md { gap: var(--space-4) !important; }
.dsf-text-truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.dsf-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;
}