/**
 * Lab V2 Design System - Shared Styles
 * ======================================
 * Common styles for all V2 lab value pages.
 * Individual pages should set panel-specific colors via CSS custom properties.
 * 
 * Required CSS Variables (set per-page):
 * --panel-primary: Primary gradient color (e.g., #0e7490 for ABG)
 * --panel-secondary: Secondary gradient color (e.g., #06b6d4 for ABG)  
 * --panel-accent: Accent/highlight color (e.g., #67e8f9 for ABG)
 * --panel-accent-rgb: RGB values for rgba() usage (e.g., 6, 182, 212)
 */

/* ========== Reset & Base ========== */
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { overflow-x: hidden; width: 100%; max-width: 100vw; }
body { 
    background: #0f172a; 
    color: #e2e8f0; 
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif; 
}

/* ========== Skip Link ========== */
.skip-link { 
    position: absolute; 
    top: -100px; 
    left: 50%; 
    transform: translateX(-50%); 
    background: #3b82f6; 
    color: #fff; 
    padding: 0.75rem 1.5rem; 
    border-radius: 0 0 8px 8px; 
    z-index: 10001; 
    text-decoration: none; 
    font-weight: 600; 
    transition: top 0.2s; 
}
.skip-link:focus { top: 0; }

/* ========== Animations ========== */
@keyframes gradientShift { 
    0% { background-position: 0% 50%; } 
    50% { background-position: 100% 50%; } 
    100% { background-position: 0% 50%; } 
}
@keyframes slideIn { 
    from { opacity: 0; transform: translateY(20px); } 
    to { opacity: 1; transform: translateY(0); } 
}
@keyframes fadeInUp { 
    from { opacity: 0; transform: translateY(30px); } 
    to { opacity: 1; transform: translateY(0); } 
}

/* ========== Hero Section ========== */
.page-hero { 
    background: linear-gradient(-45deg, var(--panel-primary, #0e7490), #1e3a8a, #0f172a, var(--panel-secondary, #06b6d4)); 
    background-size: 400% 400%; 
    animation: gradientShift 15s ease infinite; 
    padding: 5rem 2rem 3rem; 
    text-align: center; 
    position: relative; 
    overflow: hidden; 
}
.page-hero::before { 
    content: ''; 
    position: absolute; 
    top: 0; left: 0; right: 0; bottom: 0; 
    background: radial-gradient(ellipse at center, transparent 0%, rgba(15, 23, 42, 0.4) 100%); 
    pointer-events: none; 
}
.hero-content { 
    position: relative; 
    z-index: 1; 
    max-width: 900px; 
    margin: 0 auto; 
    animation: slideIn 0.8s ease-out; 
}
.hero-badge { 
    display: inline-flex; 
    align-items: center; 
    gap: 0.5rem; 
    background: rgba(var(--panel-accent-rgb, 6, 182, 212), 0.2); 
    border: 1px solid rgba(var(--panel-accent-rgb, 6, 182, 212), 0.4); 
    padding: 0.5rem 1rem; 
    border-radius: 20px; 
    font-size: 0.85rem; 
    color: var(--panel-accent, #67e8f9); 
    margin-bottom: 1.5rem; 
}
.hero-badge i, .hero-badge svg { width: 16px; height: 16px; }
.hero-title { 
    font-size: clamp(2rem, 5vw, 3rem); 
    font-weight: 800; 
    background: linear-gradient(135deg, var(--panel-accent, #67e8f9), #f1f5f9, var(--panel-accent, #67e8f9)); 
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent; 
    background-clip: text; 
    margin-bottom: 0.75rem; 
    line-height: 1.2; 
}
.hero-subtitle { 
    font-size: 1.1rem; 
    color: #cbd5e1; 
    max-width: 700px; 
    margin: 0 auto 1.5rem; 
    line-height: 1.7; 
}

/* ========== Breadcrumb ========== */
.breadcrumb { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    gap: 0.5rem; 
    flex-wrap: wrap; 
    margin-bottom: 1.5rem; 
}
.breadcrumb a { 
    color: #94a3b8; 
    text-decoration: none; 
    font-size: 0.9rem; 
    transition: color 0.2s; 
}
.breadcrumb a:hover { color: #f1f5f9; }
.breadcrumb span { color: #64748b; }
.breadcrumb .current { color: var(--panel-accent, #67e8f9); font-weight: 600; }

/* ========== Main Content ========== */
.main-content { 
    max-width: 900px; 
    margin: 0 auto; 
    padding: 3rem 1.5rem; 
}

/* ========== Disclaimers ========== */
.disclaimers { 
    margin-bottom: 2rem; 
    animation: fadeInUp 0.6s ease-out 0.1s both; 
}
.disclaimer { 
    background: linear-gradient(145deg, #1e293b, #1a2436); 
    border: 1px solid #334155; 
    border-radius: 12px; 
    margin-bottom: 0.75rem; 
    overflow: hidden; 
}
.disclaimer summary { 
    display: flex; 
    align-items: center; 
    gap: 0.75rem; 
    padding: 1rem 1.25rem; 
    cursor: pointer; 
    list-style: none; 
    color: #94a3b8; 
    font-size: 0.9rem; 
    transition: background 0.2s; 
}
.disclaimer summary::-webkit-details-marker { display: none; }
.disclaimer summary:hover { background: rgba(51, 65, 85, 0.3); }
.disclaimer summary i, .disclaimer summary svg { color: #f59e0b; flex-shrink: 0; width: 18px; height: 18px; }
.disclaimer.ai summary i, .disclaimer.ai summary svg { color: #3b82f6; }
.disclaimer-content { 
    padding: 0 1.25rem 1rem 2.75rem; 
    color: #94a3b8; 
    font-size: 0.9rem; 
    line-height: 1.6; 
}
.disclaimer-content ul { margin: 0; padding-left: 1rem; }
.disclaimer-content li { margin-bottom: 0.5rem; }
.disclaimer-content strong { color: #e2e8f0; }

/* ========== Lab Section (Always Visible) ========== */
.lab-section { 
    background: linear-gradient(145deg, #1e293b, #1a2436); 
    border: 1px solid #334155; 
    border-radius: 16px; 
    padding: 2rem; 
    margin-bottom: 1.5rem; 
    animation: fadeInUp 0.6s ease-out; 
}
.lab-section-title { 
    color: var(--panel-accent, #67e8f9); 
    font-size: 1.35rem; 
    margin-bottom: 1.25rem; 
    padding-bottom: 0.75rem; 
    border-bottom: 2px solid rgba(var(--panel-accent-rgb, 6, 182, 212), 0.3); 
    display: flex; 
    align-items: center; 
    gap: 0.75rem; 
}
.lab-section-title i, .lab-section-title svg { 
    width: 22px; 
    height: 22px; 
    color: var(--panel-secondary, #06b6d4); 
}
.lab-section-content { 
    color: #cbd5e1; 
    line-height: 1.8; 
    font-size: 1.05rem; 
}
.lab-section-content p { margin-bottom: 1rem; }
.lab-section-content h3 { 
    color: var(--panel-accent, #67e8f9); 
    font-size: 1.15rem; 
    margin: 1.75rem 0 1rem; 
    font-weight: 600; 
}
.lab-section-content ul { margin: 0.75rem 0 1rem 1.5rem; }
.lab-section-content li { margin-bottom: 0.5rem; }
.lab-section-content strong { color: #f1f5f9; }

/* ========== Collapsible Sections ========== */
.collapsible { 
    background: linear-gradient(145deg, #1e293b, #1a2436); 
    border: 1px solid #334155; 
    border-radius: 16px; 
    margin-bottom: 1.5rem; 
    overflow: hidden; 
    animation: fadeInUp 0.6s ease-out; 
}
.collapsible summary { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    padding: 1.25rem 1.5rem; 
    cursor: pointer; 
    list-style: none; 
    color: var(--panel-accent, #67e8f9); 
    font-size: 1.25rem; 
    font-weight: 600; 
    transition: background 0.2s; 
}
.collapsible summary::-webkit-details-marker { display: none; }
.collapsible summary:hover { background: rgba(var(--panel-accent-rgb, 6, 182, 212), 0.05); }
.collapsible summary .section-icon { display: flex; align-items: center; gap: 0.75rem; }
.collapsible summary .section-icon i, .collapsible summary .section-icon svg { 
    width: 22px; 
    height: 22px; 
    color: var(--panel-secondary, #06b6d4); 
}
.collapsible summary .toggle-icon { color: #64748b; transition: transform 0.3s; }
.collapsible summary .toggle-icon i, .collapsible summary .toggle-icon svg { width: 20px; height: 20px; }
.collapsible[open] summary .toggle-icon { transform: rotate(180deg); }
.collapsible-content { 
    padding: 0 1.5rem 1.5rem; 
    color: #cbd5e1; 
    line-height: 1.8; 
    font-size: 1.05rem; 
}
.collapsible-content p { margin-bottom: 1rem; }
.collapsible-content h3, .collapsible-content h4 { 
    color: var(--panel-accent, #67e8f9); 
    font-size: 1.1rem; 
    margin: 1.5rem 0 0.75rem; 
    font-weight: 600; 
}
.collapsible-content ul, .collapsible-content ol { margin: 0.75rem 0 1rem 1.5rem; }
.collapsible-content li { margin-bottom: 0.5rem; }
.collapsible-content strong { color: #f1f5f9; }

/* ========== Reference Table ========== */
.table-wrapper { 
    overflow-x: auto; 
    margin: 1rem 0; 
    border-radius: 12px; 
}
.reference-table { 
    width: 100%; 
    border-collapse: collapse; 
    min-width: 500px; 
}
.reference-table th, .reference-table td { 
    padding: 0.875rem 1rem; 
    text-align: left; 
    border: 1px solid #334155; 
}
.reference-table th { 
    background: linear-gradient(135deg, var(--panel-primary, #0e7490), #1e3a8a); 
    color: #f1f5f9; 
    font-weight: 600; 
}
.reference-table td { 
    background: rgba(30, 41, 59, 0.5); 
    color: #e2e8f0; 
}
.reference-table tr:hover td { 
    background: rgba(var(--panel-accent-rgb, 6, 182, 212), 0.1); 
}
.reference-table td strong { color: var(--panel-accent, #67e8f9); }

/* ========== Info Boxes ========== */
.clinical-pearl { 
    background: rgba(16, 185, 129, 0.1); 
    border-left: 4px solid #10b981; 
    padding: 1.25rem; 
    margin: 1rem 0; 
    border-radius: 0 12px 12px 0; 
}
.clinical-pearl-header { 
    display: flex; 
    align-items: center; 
    gap: 0.5rem; 
    color: #10b981; 
    font-weight: 700; 
    margin-bottom: 0.5rem; 
}
.clinical-pearl-header i, .clinical-pearl-header svg { width: 18px; height: 18px; }
.clinical-pearl p, .clinical-pearl span { color: #d1fae5; }

.warning-box { 
    background: rgba(239, 68, 68, 0.1); 
    border-left: 4px solid #ef4444; 
    padding: 1.25rem; 
    margin: 1rem 0; 
    border-radius: 0 12px 12px 0; 
}
.warning-header { 
    display: flex; 
    align-items: center; 
    gap: 0.5rem; 
    color: #ef4444; 
    font-weight: 700; 
    margin-bottom: 0.5rem; 
}
.warning-header i, .warning-header svg { width: 18px; height: 18px; }
.warning-box ul, .warning-box ol { margin: 0.5rem 0 0 1.5rem; }
.warning-box li { color: #fecaca; margin-bottom: 0.5rem; }
.warning-box strong { color: #fca5a5; }

.info-box { 
    background: rgba(59, 130, 246, 0.1); 
    border-left: 4px solid #3b82f6; 
    padding: 1.25rem; 
    margin: 1rem 0; 
    border-radius: 0 12px 12px 0; 
}
.info-header { 
    display: flex; 
    align-items: center; 
    gap: 0.5rem; 
    color: #3b82f6; 
    font-weight: 700; 
    margin-bottom: 0.5rem; 
}
.info-header i, .info-header svg { width: 18px; height: 18px; }
.info-box ul { margin: 0.5rem 0 0 1.5rem; }
.info-box li { color: #bfdbfe; margin-bottom: 0.5rem; }
.info-box strong { color: #93c5fd; }

/* ========== Back Button ========== */
.back-section { 
    margin-top: 3rem; 
    padding-top: 2rem; 
    border-top: 1px solid #1e293b; 
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 0.6s ease-out 0.3s both; 
}
.back-button { 
    display: inline-flex; 
    align-items: center; 
    gap: 0.5rem; 
    padding: 0.875rem 1.5rem; 
    background: linear-gradient(145deg, #1e293b, #1a2436); 
    border: 1px solid #334155; 
    border-radius: 10px; 
    color: #94a3b8; 
    text-decoration: none; 
    font-weight: 500; 
    transition: all 0.3s ease; 
}
.back-button:hover { 
    border-color: var(--panel-secondary, #06b6d4); 
    color: #f1f5f9; 
    transform: translateX(-4px); 
}
.back-button.primary {
    background: linear-gradient(135deg, var(--panel-secondary, #06b6d4), var(--panel-primary, #0e7490));
    border-color: transparent;
    color: white;
}
.back-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(var(--panel-accent-rgb, 6, 182, 212), 0.3);
}
.back-button i, .back-button svg { width: 18px; height: 18px; }

/* ========== Mobile Hamburger ========== */
.v2-header__toggle { 
    display: none; 
    flex-direction: column; 
    justify-content: center; 
    align-items: center; 
    gap: 5px; 
    width: 40px; 
    height: 40px; 
    background: transparent; 
    border: none; 
    cursor: pointer; 
    padding: 8px; 
    z-index: 1001; 
}
.v2-header__toggle span { 
    display: block; 
    width: 22px; 
    height: 2px; 
    background: #e2e8f0; 
    border-radius: 2px; 
    transition: all 0.3s ease; 
}
.v2-header__toggle--active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.v2-header__toggle--active span:nth-child(2) { opacity: 0; }
.v2-header__toggle--active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ========== Panel Cards Grid (for panel index pages) ========== */
.panel-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.panel-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem;
    background: linear-gradient(145deg, rgba(30, 41, 59, 0.8), rgba(15, 23, 42, 0.9));
    border: 1px solid #334155;
    border-radius: 12px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

.panel-card:hover {
    border-color: var(--panel-secondary, #06b6d4);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.panel-card-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--panel-primary, #0e7490), var(--panel-secondary, #06b6d4));
    border-radius: 10px;
}

.panel-card-icon i,
.panel-card-icon svg {
    width: 22px;
    height: 22px;
    color: #fff;
}

.panel-card-content {
    flex: 1;
    min-width: 0;
}

.panel-card-content h3 {
    color: #f1f5f9;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.panel-card-range {
    color: var(--panel-accent, #67e8f9);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.panel-card-content p {
    color: #94a3b8;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

.panel-card-arrow {
    flex-shrink: 0;
    color: #64748b;
    transition: transform 0.2s, color 0.2s;
}

.panel-card-arrow i,
.panel-card-arrow svg {
    width: 20px;
    height: 20px;
}

.panel-card:hover .panel-card-arrow {
    color: var(--panel-accent, #67e8f9);
    transform: translateX(4px);
}

@media (max-width: 768px) {
    .panel-cards-grid {
        grid-template-columns: 1fr;
    }
    .panel-card {
        padding: 1rem;
    }
    .panel-card-icon {
        width: 40px;
        height: 40px;
    }
    .panel-card-icon i,
    .panel-card-icon svg {
        width: 20px;
        height: 20px;
    }
}

/* ========== Footer ========== */
.footer { 
    background: #0a0f1a; 
    border-top: 1px solid #1e293b; 
    padding: 2rem; 
    text-align: center; 
    margin-top: 4rem; 
}
.footer p { color: #64748b; font-size: 0.9rem; }

/* ========== Mobile Responsive ========== */
@media (max-width: 768px) {
    .v2-header__toggle { display: flex; }
    .v2-header__nav { 
        display: none; 
        position: absolute; 
        top: 100%; 
        left: 0; 
        right: 0; 
        background: rgba(15, 23, 42, 0.98); 
        backdrop-filter: blur(20px); 
        border-top: 1px solid #334155; 
        padding: 1rem; 
    }
    .v2-header__nav--open { display: block; }
    .v2-header__nav-list { flex-direction: column; gap: 0.5rem; }
    .v2-header__nav-link { justify-content: center; padding: 0.875rem; }
    .page-hero { padding: 4rem 1.5rem 2.5rem; }
    .main-content { padding: 2rem 1rem; max-width: 100%; }
    .lab-section { padding: 1.5rem; margin-left: 0; margin-right: 0; }
    .collapsible { margin-bottom: 1.25rem; }
    .collapsible summary { padding: 1rem 1.25rem; font-size: 1.1rem; }
    .collapsible-content { padding: 0 1.25rem 1.25rem; }
    .reference-table { font-size: 0.9rem; }
    .reference-table th, .reference-table td { padding: 0.625rem 0.75rem; }
}

/* ========== Panel Color Presets ========== */
/* ABG Panel - Teal/Cyan */
.panel-abg {
    --panel-primary: #0e7490;
    --panel-secondary: #06b6d4;
    --panel-accent: #67e8f9;
    --panel-accent-rgb: 6, 182, 212;
}

/* Cardiac Panel - Red */
.panel-cardiac {
    --panel-primary: #991b1b;
    --panel-secondary: #dc2626;
    --panel-accent: #fca5a5;
    --panel-accent-rgb: 220, 38, 38;
}

/* CMP Panel - Purple */
.panel-cmp {
    --panel-primary: #5b21b6;
    --panel-secondary: #7c3aed;
    --panel-accent: #c4b5fd;
    --panel-accent-rgb: 124, 58, 237;
}

/* CBC Panel - Blue */
.panel-cbc {
    --panel-primary: #1e40af;
    --panel-secondary: #3b82f6;
    --panel-accent: #93c5fd;
    --panel-accent-rgb: 59, 130, 246;
}

/* CBC/Hematology Panel - Burgundy */
.panel-hematology {
    --panel-primary: #7f1d1d;
    --panel-secondary: #991b1b;
    --panel-accent: #fca5a5;
    --panel-accent-rgb: 153, 27, 27;
}

/* Coagulation Panel - Orange */
.panel-coag {
    --panel-primary: #9a3412;
    --panel-secondary: #ea580c;
    --panel-accent: #fdba74;
    --panel-accent-rgb: 234, 88, 12;
}

/* Liver Panel - Green/Emerald */
.panel-liver {
    --panel-primary: #065f46;
    --panel-secondary: #059669;
    --panel-accent: #6ee7b7;
    --panel-accent-rgb: 5, 150, 105;
}

/* Lipid Panel - Yellow/Amber */
.panel-lipid {
    --panel-primary: #b45309;
    --panel-secondary: #d97706;
    --panel-accent: #fcd34d;
    --panel-accent-rgb: 217, 119, 6;
}

/* Renal Panel - Blue/Slate */
.panel-renal {
    --panel-primary: #1e40af;
    --panel-secondary: #2563eb;
    --panel-accent: #93c5fd;
    --panel-accent-rgb: 37, 99, 235;
}

/* Thyroid Panel - Pink/Rose */
.panel-thyroid {
    --panel-primary: #9d174d;
    --panel-secondary: #db2777;
    --panel-accent: #f9a8d4;
    --panel-accent-rgb: 219, 39, 119;
}

/* Urinalysis Panel - Indigo */
.panel-urinalysis {
    --panel-primary: #4338ca;
    --panel-secondary: #6366f1;
    --panel-accent: #a5b4fc;
    --panel-accent-rgb: 99, 102, 241;
}