/* ============================================
   KPLUS DESIGN SYSTEM TOKENS v3.0
   ============================================

   USAGE GUIDE:
   - Use CSS custom properties (--token-name) for all styling
   - Never hardcode colors, spacing, or shadows
   - Component classes build on these tokens
   - Dark mode uses same token names with different values
   - 8pt spacing scale for vertical rhythm

   COMPONENT MAPPING:
   - Cards: --card-bg, --card-border, --card-shadow
   - Tables: --table-header-bg, --table-row-hover
   - Forms: --input-height, --input-focus-ring
   - Buttons: --btn-height-{size}, --btn-padding-{size}
   - Status: --status-{state}-bg/text

   ============================================ */

:root {
  /* ===================================
     BRAND — Medical Green
     =================================== */
  --color-brand:          #10B981;
  --color-brand-hover:    #059669;
  --color-brand-light:    #D1FAE5;
  --color-brand-dark:     #065F46;

  /* ===================================
     PRIMARY COLORS (remapped to brand/green)
     =================================== */
  --color-primary: #10B981;
  --color-primary-hover: #059669;
  --color-primary-active: #047857;
  --color-primary-light: #D1FAE5;
  --color-primary-dark: #065F46;
  --color-accent: #34D399;

  /* ===================================
     NEUTRAL PALETTE
     =================================== */
  --color-white: #FFFFFF;
  --color-gray-50: #F9FAFB;
  --color-gray-100: #F3F4F6;
  --color-gray-200: #E5E7EB;
  --color-gray-300: #D1D5DB;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #6B7280;
  --color-gray-600: #4B5563;
  --color-gray-700: #374151;
  --color-gray-800: #1F2937;
  --color-gray-900: #111827;
  --color-black: #000000;

  /* ===================================
     SEMANTIC STATUS COLORS
     (base · light · text — all WCAG AA)
     =================================== */
  --color-success:        #10B981;
  --color-success-light:  #D1FAE5;
  --color-success-text:   #065F46;
  --color-success-dark:   #065F46;

  --color-warning:        #F59E0B;
  --color-warning-light:  #FEF3C7;
  --color-warning-text:   #78350F;
  --color-warning-dark:   #92400E;

  --color-danger:         #EF4444;
  --color-danger-light:   #FEE2E2;
  --color-danger-text:    #7F1D1D;
  --color-danger-dark:    #991B1B;

  --color-info:           #0D9488;
  --color-info-light:     #CCFBF1;
  --color-info-text:      #115E59;
  --color-info-dark:      #0F766E;

  --color-neutral:        #64748B;
  --color-neutral-light:  #F1F5F9;
  --color-neutral-text:   #1E293B;

  --color-inprogress:        #8B5CF6;
  --color-inprogress-light:  #EDE9FE;
  --color-inprogress-text:   #4C1D95;

  /* ===================================
     TEXT — WCAG AA verified
     =================================== */
  --text-heading:     #1E293B;   /* 14.7:1 on white */
  --text-primary:     #334155;   /* 10.7:1 on white */
  --text-secondary:   #64748B;   /*  5.9:1 on white */
  --text-muted:       #64748B;
  --text-disabled:    #94A3B8;
  --text-inverse:     #FFFFFF;
  --text-on-brand:    #FFFFFF;
  --text-on-danger:   #FFFFFF;
  --text-link:        #10B981;
  --text-link-hover:  #059669;

  /* ===================================
     BACKGROUNDS
     =================================== */
  --bg-app:           #F8F9FA;   /* main page background */
  --bg-surface:       #FFFFFF;   /* cards, modals, forms, tables */
  --bg-table-header:  #F8FAFC;   /* thead rows */
  --bg-row-hover:     #F8FAFC;   /* tbody tr on hover */
  --bg-input:         #F8F9FA;   /* input/select default */
  --bg-input-focus:   #FFFFFF;   /* input focused */
  /* legacy aliases */
  --bg-body:          var(--bg-app);
  --bg-surface-alt:   var(--bg-app);
  --bg-surface-hover: var(--bg-row-hover);
  --bg-overlay:       rgba(0,0,0,0.5);

  /* ===================================
     BORDERS
     =================================== */
  --border-default:      rgba(0,0,0,0.07);
  --border-table:        #F1F5F9;
  --border-input:        #CBD5E1;
  --border-input-focus:  #10B981;
  --border-divider:      #E2E8F0;
  /* legacy aliases */
  --border-light:   #F1F5F9;
  --border-strong:  #D1D5DB;
  --border-focus:   var(--border-input-focus);

  /* ===================================
     SHADOWS
     =================================== */
  --shadow-card:   0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -1px rgba(0,0,0,0.03);
  --shadow-hover:  0 10px 25px -5px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
  --shadow-focus:  0 0 0 3px rgba(16,185,129,0.15);
  /* legacy elevation scale */
  --shadow-xs: 0 1px 2px 0 rgba(0,0,0,0.05);
  --shadow-sm: var(--shadow-card);
  --shadow:    0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
  --shadow-md: var(--shadow);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 8px 10px -6px rgba(0,0,0,0.1);
  --shadow-2xl:0 25px 50px -12px rgba(0,0,0,0.25);
  /* card aliases */
  --card-shadow:       var(--shadow-card);
  --card-shadow-hover: var(--shadow-hover);

  /* ===================================
     BORDER RADIUS
     =================================== */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-pill: 999px;
  --radius-none: 0;
  --radius:      6px;
  --radius-xl:   16px;
  --radius-2xl:  24px;
  --radius-full: 9999px;

  /* ===================================
     TYPOGRAPHY
     =================================== */
  --font-family: 'Poppins', system-ui, -apple-system, sans-serif;
  --font-size-xs:   11px;
  --font-size-sm:   12px;
  --font-size-base: 13px;
  --font-size-md:   14px;
  --font-size-lg:   16px;
  --font-size-xl:   18px;
  --font-size-2xl:  22px;
  /* legacy fs scale */
  --fs-xs:   0.6875rem;  /* 11px */
  --fs-sm:   0.8125rem;  /* 13px */
  --fs-base: 0.875rem;   /* 14px */
  --fs-lg:   1rem;       /* 16px */
  --fs-xl:   1.125rem;   /* 18px */
  --fs-2xl:  1.375rem;   /* 22px */
  --fs-3xl:  1.875rem;
  --fs-4xl:  2.25rem;

  --fw-normal:   400;
  --fw-medium:   500;
  --fw-semibold: 600;
  --fw-bold:     700;

  --lh-tight:   1.25;
  --lh-normal:  1.5;
  --lh-relaxed: 1.75;

  --ls-tight:  -0.025em;
  --ls-normal: 0;
  --ls-wide:   0.025em;

  /* ===================================
     LAYOUT
     =================================== */
  --sidebar-width:   260px;
  --navbar-height:   0px;           /* Profile avatar floats — not in document flow */
  --content-padding: 28px;
  --touch-target:    44px;
  --transition:      all 0.25s ease;
  --transition-fast: all 0.15s ease;
  --transition-base: 0.2s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.3s cubic-bezier(0.4,0,0.2,1);

  /* ===================================
     SPACING (8pt grid)
     =================================== */
  --sp-0:  0;
  --sp-1:  0.25rem;
  --sp-2:  0.5rem;
  --sp-3:  0.75rem;
  --sp-4:  1rem;
  --sp-5:  1.25rem;
  --sp-6:  1.5rem;
  --sp-8:  2rem;
  --sp-10: 2.5rem;
  --sp-12: 3rem;
  --sp-16: 4rem;

  /* ===================================
     Z-INDEX
     =================================== */
  --z-base:           0;
  --z-dropdown:       1000;
  --z-sticky:         1020;
  --z-fixed:          1030;
  --z-modal-backdrop: 1040;
  --z-modal:          1050;
  --z-popover:        1060;
  --z-tooltip:        1070;

  /* ===================================
     CARD SYSTEM ALIASES
     =================================== */
  --card-bg:          var(--bg-surface);
  --card-border:      var(--border-default);
  --card-header-bg:   linear-gradient(135deg, var(--bg-table-header) 0%, var(--bg-surface) 100%);
  --card-title-color: var(--text-heading);
  --card-subtitle-color: var(--text-secondary);

  /* ===================================
     FORM SYSTEM
     =================================== */
  --input-bg:             var(--bg-input);
  --input-border:         var(--border-input);
  --input-border-focus:   var(--border-input-focus);
  --input-text:           var(--text-primary);
  --input-placeholder:    var(--text-muted);
  --input-disabled-bg:    var(--color-gray-100);
  --input-disabled-text:  var(--text-disabled);
  --input-height-sm:      32px;
  --input-height-md:      40px;
  --input-height-lg:      48px;
  --input-padding-x:      var(--sp-3);
  --input-focus-ring:     var(--shadow-focus);
  --input-error-border:   var(--color-danger);
  --input-error-ring:     0 0 0 3px rgba(239,68,68,0.15);
  --input-success-border: var(--color-success);
  --input-success-ring:   0 0 0 3px rgba(16,185,129,0.15);

  /* ===================================
     TABLE SYSTEM
     =================================== */
  --table-bg:          var(--bg-surface);
  --table-border:      var(--border-table);
  --table-header-bg:   var(--bg-table-header);
  --table-header-text: var(--text-secondary);
  --table-row-hover:   var(--bg-row-hover);
  --table-row-striped: var(--bg-app);
  --table-cell-padding: var(--sp-3);

  /* ===================================
     STATUS (legacy aliases)
     =================================== */
  --status-active-bg:       var(--color-success-light);
  --status-active-text:     var(--color-success-text);
  --status-active-border:   var(--color-success);
  --status-completed-bg:    var(--color-info-light);
  --status-completed-text:  var(--color-info-text);
  --status-completed-border:var(--color-info);
  --status-warning-bg:      var(--color-warning-light);
  --status-warning-text:    var(--color-warning-text);
  --status-warning-border:  var(--color-warning);
  --status-cancelled-bg:    var(--color-danger-light);
  --status-cancelled-text:  var(--color-danger-text);
  --status-cancelled-border:var(--color-danger);
  --status-inactive-bg:     var(--color-neutral-light);
  --status-inactive-text:   var(--color-neutral-text);
  --status-inactive-border: var(--color-neutral);
  --status-no-show-bg:      var(--color-gray-200);
  --status-no-show-text:    var(--color-gray-700);
  --status-no-show-border:  var(--color-gray-400);

  /* ===================================
     MODAL SYSTEM
     =================================== */
  --modal-bg:         var(--bg-surface);
  --modal-header-bg:  var(--bg-table-header);
  --modal-backdrop:   rgba(0,0,0,0.5);
  --modal-shadow:     var(--shadow-lg);

  /* ===================================
     BUTTON SYSTEM
     =================================== */
  --btn-height-sm: 32px;
  --btn-height-md: var(--touch-target);
  --btn-height-lg: 48px;
  --btn-padding-x-sm: var(--sp-3);
  --btn-padding-x-md: var(--sp-4);
  --btn-padding-x-lg: var(--sp-6);
  --btn-font-size-sm: var(--fs-sm);
  --btn-font-size-md: var(--fs-base);
  --btn-font-size-lg: var(--fs-lg);
  --btn-disabled-opacity: 0.5;

  /* ===================================
     BREAKPOINTS (reference)
     =================================== */
  --breakpoint-xs:  0;
  --breakpoint-sm:  576px;
  --breakpoint-md:  768px;
  --breakpoint-lg:  992px;
  --breakpoint-xl:  1200px;
  --breakpoint-xxl: 1400px;

  /* Clinical density */
  --clinical-row-height: 40px;
  --clinical-cell-padding: var(--sp-2);
  --clinical-font-size: var(--fs-sm);
}

/* ===================================
   DARK MODE
   =================================== */
[data-theme="dark"] {
  --color-gray-50:  #1F2937;
  --color-gray-100: #374151;
  --color-gray-200: #4B5563;
  --color-gray-300: #6B7280;
  --color-gray-400: #9CA3AF;
  --color-gray-500: #D1D5DB;
  --color-gray-600: #E5E7EB;
  --color-gray-700: #F3F4F6;
  --color-gray-800: #F9FAFB;
  --color-gray-900: #FFFFFF;

  --text-heading:   #F1F5F9;
  --text-primary:   #E2E8F0;
  --text-secondary: #94A3B8;
  --text-muted:     #94A3B8;
  --text-disabled:  #64748B;

  --bg-app:          #111827;
  --bg-surface:      #1F2937;
  --bg-table-header: #374151;
  --bg-row-hover:    #374151;
  --bg-input:        #374151;
  --bg-input-focus:  #4B5563;

  --border-default: #374151;
  --border-table:   #4B5563;
  --border-input:   #4B5563;
  --border-divider: #374151;

  --shadow-card:  0 4px 6px -1px rgba(0,0,0,0.4);
  --shadow-hover: 0 10px 25px -5px rgba(0,0,0,0.5);

  --card-bg:        var(--bg-surface);
  --card-border:    var(--border-default);
  --card-header-bg: linear-gradient(135deg, #374151, #4B5563);
  --modal-bg:       var(--bg-surface);
  --modal-header-bg: var(--bg-table-header);
  --modal-backdrop: rgba(0,0,0,0.8);
  --input-bg:       var(--bg-input);
  --input-border:   var(--border-input);
  --input-disabled-bg: #4B5563;
  --table-bg:       var(--bg-surface);
  --table-header-bg:var(--bg-table-header);
  --table-row-hover:var(--bg-row-hover);
}

/* ===================================
   PRINT MODE
   =================================== */
@media print {
  :root {
    --bg-app:     white;
    --bg-surface: white;
    --text-primary:   black;
    --text-secondary: #333;
    --border-default: #000;
    --shadow-card: none;
    --shadow-hover: none;
    --shadow-xs: none;
    --shadow-sm: none;
    --shadow: none;
    --shadow-md: none;
    --shadow-lg: none;
  }
}