/* ═══════════════════════════════════════════════════════════════════
   HCT Design System — additive utility classes
   All classes are prefixed .ds- to guarantee zero collision with
   existing classes (.btn, .btn-primary, .subnav-pill, etc.)
   Do NOT modify css/styles.css — this file extends it.
   ═══════════════════════════════════════════════════════════════════ */

/* ── CSS Variables ─────────────────────────────────────────────────── */
/* Palette: HCT Vibrant (adopted 2026-05-23 from the Montez Turnover Playbook).
   Deeper teal as the brand primary, dark navy as accent, color-coded state
   colors for at-a-glance clarity. Replaces the Tukt Saigon gold ramp on
   the HCT dashboard. Body text is near-black slate for high contrast. */
:root {
  /* ── Brand: HCT Teal ─────────────────────────────────────────────── */
  --ds-color-primary:        #155E75;  /* Darker teal — identity, primary actions */
  --ds-color-primary-dark:   #0F4C5C;  /* Deeper hover / pressed */
  --ds-color-primary-light:  #0E7490;  /* Brighter active / focus rings */
  --ds-color-primary-soft:   #ECFEFF;  /* Soft teal hover background */
  --ds-color-primary-focus:  rgba(21,94,117,0.3);

  /* ── Accent: Dark Navy ───────────────────────────────────────────── */
  --ds-color-accent:         #1E3A8A;  /* Deep navy — secondary actions, links */
  --ds-color-accent-soft:    #DBEAFE;  /* Soft navy wash for surfaces */

  /* ── State colors (vibrant + obvious — matches Gina playbook) ───── */
  --ds-color-danger:        #B91C1C;  /* Vibrant red */
  --ds-color-danger-dark:   #7F1D1D;
  --ds-color-danger-soft:   #FEE2E2;

  --ds-color-warning:       #B45309;  /* Amber */
  --ds-color-warning-soft:  #FEF3C7;

  --ds-color-success:       #047857;  /* Emerald */
  --ds-color-success-soft:  #D1FAE5;

  --ds-color-info:          #1D4ED8;  /* Royal blue */
  --ds-color-info-soft:     #DBEAFE;

  --ds-color-alert:         #BE185D;  /* Pink — rare signal */
  --ds-color-alert-soft:    #FCE7F3;

  /* ── Text (near-black slate against light surfaces) ───────────── */
  --ds-color-text:           #111827;  /* Near-black — primary body text */
  --ds-color-text-secondary: #334155;  /* Slate — secondary text */
  --ds-color-text-tertiary:  #64748B;  /* Lighter slate — hints */
  --ds-color-text-on-primary: #FFFFFF;  /* White on teal backgrounds */

  /* ── Surfaces (cool whites + light teal tints) ───────────────────── */
  --ds-color-bg:             #FFFFFF;   /* True white — elevated cards */
  --ds-color-bg-page:        #F0FDFA;   /* Light teal — page background */
  --ds-color-bg-secondary:   #ECFDF5;   /* Mint — hover / zebra */
  --ds-color-border:         #A5F3FC;   /* Light teal border */
  --ds-color-border-strong:  #5EEAD4;   /* Brighter teal border */

  /* Legacy aliases — back-compat for anything still reading the old names */
  --ds-color-bg-secondary-legacy: #f9fafb;

  --ds-radius-sm: 3px;
  --ds-radius-md: 4px;
  --ds-radius-lg: 6px;
  --ds-radius-xl: 8px;
  --ds-radius-card: 10px;

  --ds-font-xs: 11px;
  --ds-font-sm: 12px;
  --ds-font-md: 13px;
  --ds-font-lg: 14px;
  --ds-font-xl: 16px;

  --ds-shadow-sm: 0 1px 2px rgba(17,24,39,0.05);
  --ds-shadow-md: 0 1px 3px rgba(17,24,39,0.06), 0 4px 6px rgba(17,24,39,0.04);
  --ds-shadow-lg: 0 10px 15px rgba(17,24,39,0.08);

  --ds-transition: 0.12s ease;
}

/* ── Spinner keyframe ──────────────────────────────────────────────── */
@keyframes ds-spin {
  to { transform: rotate(360deg); }
}

@keyframes ds-pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.4; }
}

/* ═══════════════════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════════════════ */

.ds-btn {
  display:         inline-flex;
  align-items:     center;
  justify-content: center;
  gap:             6px;
  height:          36px;
  padding:         8px 14px;
  font-size:       var(--ds-font-md);
  font-weight:     500;
  line-height:     1;
  border:          1px solid transparent;
  border-radius:   var(--ds-radius-md);
  cursor:          pointer;
  text-decoration: none;
  white-space:     nowrap;
  transition:      background var(--ds-transition),
                   border-color var(--ds-transition),
                   color var(--ds-transition),
                   box-shadow var(--ds-transition),
                   opacity var(--ds-transition);
  box-sizing:      border-box;
}

/* Sizes */
.ds-btn.ds-btn-sm {
  height:    28px;
  padding:   6px 12px;
  font-size: var(--ds-font-sm);
}

.ds-btn.ds-btn-lg {
  height:    44px;
  padding:   10px 18px;
  font-size: var(--ds-font-lg);
}

/* Icon-only */
.ds-btn.ds-btn-icon {
  width:   32px;
  height:  32px;
  padding: 0;
}
.ds-btn.ds-btn-icon.ds-btn-sm {
  width:  28px;
  height: 28px;
}

/* Variants */
.ds-btn-primary {
  background: var(--ds-color-primary);
  color:      #ffffff;
  border-color: var(--ds-color-primary);
}
.ds-btn-primary:hover {
  background:   var(--ds-color-primary-dark);
  border-color: var(--ds-color-primary-dark);
}
.ds-btn-primary:focus-visible {
  outline: 3px solid var(--ds-color-primary-focus);
  outline-offset: 2px;
}

.ds-btn-secondary {
  background:   transparent;
  color:        var(--ds-color-primary);
  border-color: var(--ds-color-primary);
}
.ds-btn-secondary:hover {
  background: var(--ds-color-primary-soft);
}
.ds-btn-secondary:focus-visible {
  outline: 3px solid var(--ds-color-primary-focus);
  outline-offset: 2px;
}

.ds-btn-tertiary {
  background:   transparent;
  color:        var(--ds-color-text-secondary);
  border-color: transparent;
}
.ds-btn-tertiary:hover {
  background: var(--ds-color-bg-secondary);
  color:      var(--ds-color-text);
}
.ds-btn-tertiary:focus-visible {
  outline: 3px solid var(--ds-color-primary-focus);
  outline-offset: 2px;
}

.ds-btn-destructive {
  background:   var(--ds-color-danger);
  color:        #ffffff;
  border-color: var(--ds-color-danger);
}
.ds-btn-destructive:hover {
  background:   var(--ds-color-danger-dark);
  border-color: var(--ds-color-danger-dark);
}
.ds-btn-destructive:focus-visible {
  outline: 3px solid rgba(220,38,38,0.3);
  outline-offset: 2px;
}

/* Split button — primary + right caret */
.ds-btn-split {
  padding-right: 10px;
}
.ds-caret {
  display:       inline-block;
  width:         0;
  height:        0;
  border-left:   4px solid transparent;
  border-right:  4px solid transparent;
  border-top:    5px solid currentColor;
  margin-left:   4px;
  vertical-align: middle;
}

/* Plus icon helper */
.ds-plus {
  display:         inline-flex;
  align-items:     center;
  justify-content: center;
  width:           14px;
  height:          14px;
  border-radius:   50%;
  background:      rgba(255,255,255,0.25);
  font-size:       12px;
  line-height:     1;
  font-weight:     700;
}

/* Loading state */
.ds-btn-loading {
  pointer-events: none;
  opacity:        0.8;
}
.ds-btn-loading::before {
  content:       '';
  display:       inline-block;
  width:         12px;
  height:        12px;
  border:        1.5px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation:     ds-spin 0.6s linear infinite;
  flex-shrink:   0;
}

/* Disabled state */
.ds-btn:disabled,
.ds-btn-disabled {
  opacity:        0.4;
  cursor:         not-allowed;
  pointer-events: none;
}

/* ═══════════════════════════════════════════════════════════════════
   TABS
   ═══════════════════════════════════════════════════════════════════ */

.ds-tabs {
  display:         flex;
  align-items:     flex-end;
  gap:             2px;
  border-bottom:   1.5px solid var(--ds-color-border);
  padding-bottom:  0;
}

.ds-tab {
  display:       inline-flex;
  align-items:   center;
  gap:           6px;
  padding:       8px 14px;
  font-size:     var(--ds-font-md);
  font-weight:   400;
  color:         var(--ds-color-text-secondary);
  background:    transparent;
  border:        none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1.5px;
  cursor:        pointer;
  transition:    color var(--ds-transition),
                 border-color var(--ds-transition),
                 background var(--ds-transition);
  white-space:   nowrap;
  border-radius: var(--ds-radius-sm) var(--ds-radius-sm) 0 0;
}

.ds-tab:hover {
  color:      var(--ds-color-text);
  background: var(--ds-color-bg-secondary);
}

.ds-tab:focus-visible {
  outline: 3px solid var(--ds-color-primary-focus);
  outline-offset: 2px;
}

.ds-tab-active {
  color:         var(--ds-color-primary);
  font-weight:   500;
  border-bottom: 2px solid var(--ds-color-primary);
}

.ds-tab-active:hover {
  color:      var(--ds-color-primary);
  background: var(--ds-color-primary-soft);
}

.ds-tab-count {
  font-size:   var(--ds-font-xs);
  font-weight: 400;
  color:       var(--ds-color-text-tertiary);
}
.ds-tab-active .ds-tab-count {
  color: var(--ds-color-primary);
}

.ds-tab-alert {
  display:       inline-block;
  width:         6px;
  height:        6px;
  border-radius: 50%;
  background:    var(--ds-color-danger);
  flex-shrink:   0;
}

.ds-tab-disabled {
  color:          var(--ds-color-text-tertiary);
  cursor:         not-allowed;
  pointer-events: none;
}

/* Sticky variant */
.ds-tabs-sticky {
  position:   sticky;
  top:        0;
  background: var(--ds-color-bg);
  z-index:    5;
}

/* Mobile horizontal scrolling */
@media (max-width: 640px) {
  .ds-tabs {
    overflow-x:         auto;
    scroll-snap-type:   x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width:    none;
  }
  .ds-tabs::-webkit-scrollbar { display: none; }

  .ds-tab {
    scroll-snap-align: start;
    flex-shrink:       0;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   STATUS PILLS
   ═══════════════════════════════════════════════════════════════════ */

.ds-pill {
  display:       inline-block;
  padding:       3px 10px;
  border-radius: 3px;
  font-size:     var(--ds-font-xs);
  font-weight:   500;
  line-height:   1.4;
  white-space:   nowrap;
}

.ds-pill-success {
  background: var(--ds-color-success-soft);
  color:      #065f46;
}

.ds-pill-warning {
  background: var(--ds-color-warning-soft);
  color:      #92400e;
}

.ds-pill-danger {
  background: var(--ds-color-danger-soft);
  color:      #991b1b;
}

.ds-pill-info {
  background: var(--ds-color-info-soft);
  color:      #1e40af;
}

.ds-pill-neutral {
  background: #f3f4f6;
  color:      #374151;
}

/* ═══════════════════════════════════════════════════════════════════
   PAGE HEADER
   ═══════════════════════════════════════════════════════════════════ */

.ds-page-header {
  display:         flex;
  align-items:     flex-start;
  justify-content: space-between;
  gap:             16px;
  padding:         16px 0 12px;
}

.ds-page-header-text {
  display:        flex;
  flex-direction: column;
  gap:            4px;
  flex:           1;
  min-width:      0;
}

.ds-breadcrumb {
  font-size: var(--ds-font-xs);
  color:     var(--ds-color-text-tertiary);
}
.ds-breadcrumb a {
  color:           var(--ds-color-text-tertiary);
  text-decoration: none;
}
.ds-breadcrumb a:hover {
  color:           var(--ds-color-text-secondary);
  text-decoration: underline;
}

.ds-page-title {
  margin:      0;
  font-size:   20px;
  font-weight: 500;
  color:       var(--ds-color-text);
  line-height: 1.2;
}

.ds-page-desc {
  margin:    0;
  font-size: var(--ds-font-sm);
  color:     var(--ds-color-text-secondary);
}

.ds-page-actions {
  display:     flex;
  align-items: center;
  gap:         8px;
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .ds-page-header {
    flex-direction: column;
  }
  .ds-page-actions {
    width: 100%;
  }
}

/* ═══════════════════════════════════════════════════════════════════
   EMPTY STATE
   ═══════════════════════════════════════════════════════════════════ */

.ds-empty {
  display:         flex;
  flex-direction:  column;
  align-items:     center;
  justify-content: center;
  padding:         36px 24px;
  text-align:      center;
  gap:             10px;
}

.ds-empty-icon {
  display:         flex;
  align-items:     center;
  justify-content: center;
  width:           48px;
  height:          48px;
  border-radius:   var(--ds-radius-lg);
  background:      var(--ds-color-primary-soft);
  color:           var(--ds-color-primary);
  font-size:       22px;
  margin-bottom:   4px;
}

.ds-empty-title {
  margin:      0;
  font-size:   var(--ds-font-lg);
  font-weight: 500;
  color:       var(--ds-color-text);
}

.ds-empty-desc {
  margin:    0;
  font-size: var(--ds-font-sm);
  color:     var(--ds-color-text-secondary);
  max-width: 340px;
}

/* ═══════════════════════════════════════════════════════════════════
   SKELETON LOADING
   ═══════════════════════════════════════════════════════════════════ */

.ds-skeleton {
  display:       block;
  background:    #e5e7eb;
  border-radius: var(--ds-radius-sm);
  animation:     ds-pulse 2s linear infinite;
}

.ds-skeleton-row {
  width:  100%;
  height: 14px;
}

.ds-skeleton-card {
  width:  100%;
  height: 80px;
}