/**
 * MZ Blood Bridge - Life-Saving Modernism Design System
 * Document Version: 1.0.0 (Production 2026)
 * WCAG AAA Compliant Design Tokens, Glassmorphism, 3D Elevation & Reusable Utilities
 */

:root {
    /* -------------------------------------------------------------
       1. COLOR SYSTEM (Accessible Contrast WCAG AAA Compliant)
       ------------------------------------------------------------- */
    /* Primary Crimson (Blood & Vitality) */
    --crimson-50:  #FFF1F2;
    --crimson-100: #FFE4E6;
    --crimson-200: #FECDD3;
    --crimson-300: #FDA4AF;
    --crimson-400: #FB7185;
    --crimson-500: #F43F5E;
    --crimson-600: #DC2626; /* Primary Brand Crimson */
    --crimson-700: #C62828; /* Deep Medical Crimson */
    --crimson-800: #991B1B; /* Dark Ruby Crimson */
    --crimson-900: #881337;

    /* Medical Emerald (Recovery, Verification & Safety) */
    --emerald-50:  #ECFDF5;
    --emerald-100: #D1FAE5;
    --emerald-200: #A7F3D0;
    --emerald-500: #10B981;
    --emerald-600: #059669; /* Medical Emerald Primary */
    --emerald-700: #047857;

    /* Urgent Amber (Triage & Emergency Alerts) */
    --amber-50:   #FFFBEB;
    --amber-100:  #FEF3C7;
    --amber-500:  #F59E0B;
    --amber-600:  #D97706; /* Emergency Amber Primary */
    --amber-700:  #B45309;

    /* Neutral Slate Surfaces (Light Mode) */
    --canvas-bg:       #F8FAFC;
    --surface-card:    #FFFFFF;
    --surface-hover:   #F1F5F9;
    --border-subtle:   #E2E8F0;
    --text-primary:    #0F172A; /* Contrast >= 15:1 against light canvas (WCAG AAA) */
    --text-secondary:  #334155; /* Contrast >= 9:1 (WCAG AAA) */
    --text-muted:      #64748B;

    /* -------------------------------------------------------------
       2. GLASSMORPHISM & TRANSLUCENCY TOKENS
       ------------------------------------------------------------- */
    --glass-surface:       rgba(255, 255, 255, 0.82);
    --glass-surface-dense: rgba(255, 255, 255, 0.94);
    --glass-border:        rgba(255, 255, 255, 0.65);
    --glass-border-subtle: rgba(226, 232, 240, 0.8);
    --glass-blur:          blur(16px);
    --glass-glow:          0 0 24px rgba(220, 38, 38, 0.12);

    /* -------------------------------------------------------------
       3. 3D CARD DEPTH & MULTI-TIER ELEVATION MATRIX
       ------------------------------------------------------------- */
    --depth-1: 0 1px 3px rgba(15, 23, 42, 0.08), 0 1px 2px rgba(15, 23, 42, 0.04);
    --depth-2: 0 4px 6px -1px rgba(15, 23, 42, 0.10), 0 2px 4px -1px rgba(15, 23, 42, 0.06);
    --depth-3: 0 10px 15px -3px rgba(15, 23, 42, 0.10), 0 4px 6px -2px rgba(15, 23, 42, 0.05);
    --depth-4: 0 20px 25px -5px rgba(15, 23, 42, 0.12), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    --depth-3d-card: 0 20px 40px -15px rgba(220, 38, 38, 0.25), 0 0 1px 1px rgba(255, 255, 255, 0.1);

    /* -------------------------------------------------------------
       4. TYPOGRAPHY HIERARCHY
       ------------------------------------------------------------- */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-urdu: 'Noto Nastaliq Urdu', 'Jameel Noori Nastaleeq', 'Urdu Typesetting', serif;

    /* -------------------------------------------------------------
       5. EASING CURVES & ANIMATION SPEEDS
       ------------------------------------------------------------- */
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --ease-smooth: cubic-bezier(0.16, 1, 0.3, 1);
    --speed-fast:   180ms;
    --speed-normal: 300ms;
    --speed-slow:   600ms;

    /* Legacy Backward Compatibility Aliases */
    --primary-red:       var(--crimson-600);
    --primary-red-dark:  var(--crimson-800);
    --medical-green:     var(--emerald-600);
    --light-bg:          var(--canvas-bg);
    --dark-bg:           #0A0F1D;
    --glass-bg:          var(--glass-surface);
    --card-shadow:       var(--depth-2);
    --card-hover-shadow: var(--depth-4);
}

/* -------------------------------------------------------------
   6. DARK MODE TOKEN ADAPTATION
   ------------------------------------------------------------- */
body.dark-mode,
.dark-mode {
    --canvas-bg:       #0A0F1D;
    --surface-card:    #161F36;
    --surface-hover:   #1E293B;
    --border-subtle:   #243049;
    --text-primary:    #F8FAFC; /* Contrast >= 18:1 against dark canvas (WCAG AAA) */
    --text-secondary:  #CBD5E1; /* Contrast >= 11:1 (WCAG AAA) */
    --text-muted:      #94A3B8;

    --glass-surface:       rgba(22, 31, 54, 0.82);
    --glass-surface-dense: rgba(22, 31, 54, 0.96);
    --glass-border:        rgba(255, 255, 255, 0.08);
    --glass-border-subtle: rgba(255, 255, 255, 0.06);
    --glass-glow:          0 0 32px rgba(220, 38, 38, 0.22);

    --depth-1: 0 1px 3px rgba(0, 0, 0, 0.4);
    --depth-2: 0 4px 8px rgba(0, 0, 0, 0.5);
    --depth-3: 0 10px 20px rgba(0, 0, 0, 0.6);
    --depth-4: 0 20px 30px rgba(0, 0, 0, 0.7);
    --depth-3d-card: 0 20px 40px -15px rgba(0, 0, 0, 0.8), 0 0 1px 1px rgba(255, 255, 255, 0.12);
}

/* -------------------------------------------------------------
   7. CORE 3D ELEVATION & GLASSMORPHISM COMPONENTS
   ------------------------------------------------------------- */
.card-3d {
    position: relative;
    background: var(--glass-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    box-shadow: var(--depth-2);
    transition: transform var(--speed-normal) var(--ease-spring), 
                box-shadow var(--speed-normal) var(--ease-smooth), 
                border-color var(--speed-normal) ease,
                background-color var(--speed-normal) ease;
    transform: perspective(1000px) rotateX(0deg) rotateY(0deg) translateZ(0);
    will-change: transform, box-shadow;
    overflow: hidden;
}

.card-3d:hover {
    transform: perspective(1000px) translateY(-6px) translateZ(8px);
    box-shadow: var(--depth-3d-card);
    border-color: rgba(220, 38, 38, 0.45);
}

.card-glass {
    background: var(--glass-surface);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    box-shadow: var(--depth-1);
    transition: all var(--speed-normal) ease;
}

.card-glass:hover {
    box-shadow: var(--depth-3);
    border-color: rgba(220, 38, 38, 0.3);
}

/* -------------------------------------------------------------
   8. INTERACTIVE BLOOD GROUP SELECTION PILLS (3D TACTILE)
   ------------------------------------------------------------- */
.blood-pills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin: 8px 0 18px 0;
}

@media (max-width: 480px) {
    .blood-pills-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 8px;
    }
}

.blood-pill-label {
    position: relative;
    cursor: pointer;
    user-select: none;
    display: block;
    margin: 0;
}

.blood-pill-label input[type="radio"] {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.blood-pill-badge {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px 6px;
    background: var(--surface-card);
    border: 2px solid var(--border-subtle);
    border-radius: 14px;
    box-shadow: var(--depth-1);
    font-weight: 700;
    font-size: 15px;
    color: var(--text-primary);
    transition: transform var(--speed-fast) var(--ease-spring),
                box-shadow var(--speed-fast) var(--ease-smooth),
                border-color var(--speed-fast) ease,
                background-color var(--speed-fast) ease,
                color var(--speed-fast) ease;
}

.blood-pill-label:hover .blood-pill-badge {
    border-color: var(--crimson-400);
    transform: translateY(-2px);
    box-shadow: 0 6px 14px rgba(220, 38, 38, 0.15);
}

.blood-pill-label:active .blood-pill-badge,
.blood-pill-badge.active-press {
    transform: scale(0.92) translateY(2px) !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2) !important;
}

.blood-pill-label input[type="radio"]:checked + .blood-pill-badge {
    background: linear-gradient(135deg, var(--crimson-600), var(--crimson-700));
    color: #FFFFFF !important;
    border-color: var(--crimson-700);
    box-shadow: 0 8px 18px -2px rgba(220, 38, 38, 0.4), inset 0 1px 1px rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.blood-pill-label input[type="radio"]:focus-visible + .blood-pill-badge {
    outline: 2px solid var(--crimson-500);
    outline-offset: 2px;
}

/* -------------------------------------------------------------
   9. MODERN ACCESSIBLE FLOATING INPUTS & FORMS
   ------------------------------------------------------------- */
.form-floating-group {
    position: relative;
    margin-bottom: 16px;
}

.form-floating-input,
.form-floating-select {
    width: 100%;
    height: 52px;
    padding: 18px 14px 6px 14px;
    font-size: 15px;
    font-family: var(--font-sans);
    color: var(--text-primary);
    background: var(--surface-card);
    border: 1.5px solid var(--border-subtle);
    border-radius: 12px;
    box-shadow: var(--depth-1);
    transition: border-color var(--speed-fast) ease, 
                box-shadow var(--speed-fast) ease, 
                background-color var(--speed-fast) ease;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.form-floating-input:focus,
.form-floating-select:focus {
    border-color: var(--crimson-600);
    box-shadow: 0 0 0 3.5px rgba(220, 38, 38, 0.15);
    background: var(--surface-card);
}

.form-floating-label {
    position: absolute;
    top: 16px;
    left: 14px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    pointer-events: none;
    transition: all var(--speed-fast) var(--ease-smooth);
    background: transparent;
    transform-origin: left top;
}

.form-floating-input:focus ~ .form-floating-label,
.form-floating-input:not(:placeholder-shown) ~ .form-floating-label,
.form-floating-select:focus ~ .form-floating-label,
.form-floating-select:valid ~ .form-floating-label {
    transform: translateY(-10px) scale(0.82);
    color: var(--crimson-700);
    font-weight: 600;
}

body.dark-mode .form-floating-input:focus ~ .form-floating-label,
body.dark-mode .form-floating-input:not(:placeholder-shown) ~ .form-floating-label,
body.dark-mode .form-floating-select:focus ~ .form-floating-label,
body.dark-mode .form-floating-select:valid ~ .form-floating-label {
    color: var(--crimson-400);
}

.input-icon-wrapper {
    position: relative;
}

.input-icon-wrapper .input-leading-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 16px;
    color: var(--text-muted);
    pointer-events: none;
    z-index: 2;
}

.input-icon-wrapper .form-floating-input,
.input-icon-wrapper .form-floating-select {
    padding-left: 42px;
}

.input-icon-wrapper .form-floating-label {
    left: 42px;
}

/* -------------------------------------------------------------
   10. TRUST BADGES & VERIFICATION BANNERS
   ------------------------------------------------------------- */
.trust-badges-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
    margin: 16px 0 24px 0;
}

.trust-badge-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    background: rgba(220, 38, 38, 0.04);
    border: 1px solid rgba(220, 38, 38, 0.12);
    border-radius: 12px;
    transition: all var(--speed-normal) ease;
}

body.dark-mode .trust-badge-item {
    background: rgba(220, 38, 38, 0.08);
    border-color: rgba(220, 38, 38, 0.2);
}

.trust-badge-item:hover {
    background: rgba(220, 38, 38, 0.08);
    transform: translateY(-2px);
}

.trust-badge-icon {
    font-size: 20px;
    flex-shrink: 0;
}

.trust-badge-text strong {
    display: block;
    font-size: 12px;
    color: var(--text-primary);
    line-height: 1.2;
}

.trust-badge-text small {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    line-height: 1.2;
}

/* -------------------------------------------------------------
   11. 4 CUSTOM FEATURE BOXES (3D AGENCY MODERNISM)
   ------------------------------------------------------------- */
.feature-boxes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 22px;
    margin: 32px 0;
}

@media (min-width: 1024px) {
    .feature-boxes-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.feature-box-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 26px 22px;
    text-decoration: none !important;
    background: var(--surface-card);
    border-radius: 20px;
    border: 1px solid var(--border-subtle);
    box-shadow: var(--depth-2);
    transition: all var(--speed-normal) var(--ease-spring);
    position: relative;
    overflow: hidden;
}

.feature-box-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--crimson-500), var(--crimson-700));
    opacity: 0;
    transition: opacity var(--speed-normal) ease;
}

.feature-box-card:hover {
    transform: perspective(1000px) translateY(-8px) translateZ(10px);
    box-shadow: var(--depth-3d-card);
    border-color: rgba(220, 38, 38, 0.35);
}

.feature-box-card:hover::before {
    opacity: 1;
}

.feature-box-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 4px 10px;
    border-radius: 9999px;
    margin-bottom: 14px;
    align-self: flex-start;
}

.badge-match     { background: rgba(220, 38, 38, 0.12); color: var(--crimson-600); border: 1px solid rgba(220, 38, 38, 0.25); }
.badge-directory { background: rgba(5, 150, 105, 0.12); color: var(--emerald-600); border: 1px solid rgba(5, 150, 105, 0.25); }
.badge-lifeline  { background: rgba(217, 119, 6, 0.12); color: var(--amber-600);   border: 1px solid rgba(217, 119, 6, 0.25); }
.badge-sos       { background: rgba(220, 38, 38, 0.16); color: #DC2626;             border: 1px solid rgba(220, 38, 38, 0.35); }

.feature-box-icon-wrap {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 16px;
    background: var(--canvas-bg);
    box-shadow: var(--depth-1);
    transition: transform var(--speed-normal) var(--ease-spring);
}

.feature-box-card:hover .feature-box-icon-wrap {
    transform: scale(1.1) rotate(4deg);
}

.feature-box-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.3;
}

.feature-box-desc {
    font-size: 13.5px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 18px;
    flex-grow: 1;
}

.feature-box-cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 700;
    color: var(--crimson-600);
    transition: gap var(--speed-fast) ease;
}

.feature-box-card:hover .feature-box-cta {
    gap: 10px;
}

/* -------------------------------------------------------------
   12. REUSABLE UTILITY CLASSES (City, Pillar, Blog & FAQs)
   ------------------------------------------------------------- */
.container-narrow {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-xl {
    max-width: 1320px;
    margin: 0 auto;
    padding: 0 20px;
}

.text-gradient-crimson {
    background: linear-gradient(135deg, var(--crimson-600), var(--crimson-800));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.font-urdu {
    font-family: var(--font-urdu) !important;
    line-height: 1.8;
}

/* Interactive Language Switcher Pill */
.lang-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: var(--surface-card);
    border: 1.5px solid var(--border-subtle);
    border-radius: 9999px;
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none !important;
    box-shadow: var(--depth-1);
    transition: all var(--speed-fast) var(--ease-spring);
}

.lang-pill:hover {
    border-color: var(--crimson-500);
    color: var(--crimson-600);
    transform: translateY(-1px);
    box-shadow: var(--depth-2);
}

/* FAQ Item Modern Accordion Utilities */
.faq-card {
    background: var(--surface-card);
    border: 1px solid var(--border-subtle);
    border-radius: 14px;
    padding: 18px 22px;
    margin-bottom: 12px;
    box-shadow: var(--depth-1);
    transition: all var(--speed-fast) ease;
}

.faq-card:hover {
    border-color: rgba(220, 38, 38, 0.3);
    box-shadow: var(--depth-2);
}

.faq-question {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-answer {
    margin-top: 12px;
    font-size: 14.5px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* Medical Prose for Cornerstone Articles */
.blog-prose {
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-primary);
}

.blog-prose h2 {
    font-size: 24px;
    margin: 32px 0 16px 0;
    color: var(--text-primary);
}

.blog-prose h3 {
    font-size: 20px;
    margin: 24px 0 12px 0;
    color: var(--text-primary);
}

.blog-prose p {
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.blog-prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: var(--surface-card);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--depth-1);
}

.blog-prose th, .blog-prose td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-subtle);
    text-align: left;
}

.blog-prose th {
    background: rgba(220, 38, 38, 0.06);
    font-weight: 700;
    color: var(--text-primary);
}

/* Emergency Banner SOS */
.emergency-banner-sos {
    background: linear-gradient(135deg, #DC2626, #991B1B);
    color: #FFFFFF;
    border-radius: 16px;
    padding: 20px 24px;
    box-shadow: 0 12px 28px rgba(220, 38, 38, 0.35);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
}