/* CSS Variables for unifying 'Medical & Light' Identity */
:root {
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --glass-border: rgba(0, 0, 0, 0.05);
    --text-primary: #111827;
    --text-secondary: #374151;
    --accent-cyan: #0D8ABC;
    --accent-gold: #f39c12;
    --gradient-glow: linear-gradient(45deg, #0D8ABC, #00A8CC);
    --font-ar: 'Cairo', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent !important;
}

body.light-theme {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: var(--font-ar);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* Soft bright background pattern */
    background-image: radial-gradient(circle at 10% 20%, rgba(13, 138, 188, 0.05) 0%, transparent 20%),
                      radial-gradient(circle at 90% 80%, rgba(243, 156, 18, 0.05) 0%, transparent 20%);
    overflow-x: hidden;
}

/* Glassmorphism Navbar */
.glass-navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    box-shadow: 0 4px 20px rgba(0,0,0,0.03);
}

.logo-container {
    display: flex;
    flex-direction: column;
}

.nav-brand {
    font-size: 1.8rem;
    font-weight: 900;
    background: var(--gradient-glow);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-icon {
    font-size: 1.2rem;
    -webkit-text-fill-color: var(--accent-cyan);
}

.brand-subtitle {
    font-size: 0.8rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
}

.nav-item {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    border-radius: 50px; /* Pill shape */
}

.nav-item:hover, .nav-item:active {
    background: rgba(13, 138, 188, 0.08);
    color: var(--accent-cyan);
    box-shadow: none;
}

html {
    scroll-behavior: smooth;
}

.content-wrapper {
    flex-grow: 1;
    min-height: 80vh;
    animation: smoothPageLoad 0.4s cubic-bezier(0.25, 1, 0.5, 1) forwards;
}

@keyframes smoothPageLoad {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.glass-footer {
    background: rgba(255, 255, 255, 0.95);
    border-top: 1px solid var(--glass-border);
    padding: 2rem;
    text-align: center;
    color: var(--text-secondary);
    margin-top: auto;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.02);
}

.glass-footer a {
    color: var(--accent-gold);
    text-decoration: none;
    font-weight: bold;
    margin: 0 10px;
    transition: text-shadow 0.3s ease;
}

.glass-footer a:hover {
    text-shadow: 0 0 8px rgba(251, 191, 36, 0.6);
}

/* Animations */
/* Global normal text adjustments for clean Cairo font readability */
p, .card-desc, .tool-desc, .bio-content p, .hero-desc, .blog-desc, .article-content p {
    font-size: 1.05rem !important;
    line-height: 1.8 !important;
    color: var(--text-secondary);
}

/* Report dynamic styling */
.report-test-title {
    font-size: 1.3rem !important;
}
.report-test-desc {
    font-size: 1.05rem !important;
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

/* Mobile Responsiveness */
@media (max-width: 768px) {
    /* Prevent horizontal overflow on body/html */
    html, body {
        overflow-x: hidden !important;
        width: 100% !important;
        position: relative;
    }
    
    /* Global fluid font sizing for normal text on mobile */
    p, .card-desc, .tool-desc, .bio-content p, .hero-desc, .blog-desc, .article-content p, #diagnostic-results p, .report-test-desc {
        font-size: 0.95rem !important;
        line-height: 1.7 !important;
    }
    
    body .report-test-title {
        font-size: 1.1rem !important;
    }

    .glass-navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    /* Horizontal scroll for Nav Links to save vertical space */
    .nav-links {
        display: flex;
        flex-wrap: nowrap;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 0.8rem;
        padding-bottom: 5px;
        width: 100%;
        justify-content: flex-start;
    }
    
    .nav-links::-webkit-scrollbar {
        display: none;
    }
    
    .nav-item {
        font-size: 0.95rem;
        padding: 0.4rem 0.8rem;
        white-space: nowrap;
    }
    
    /* Fluid header sizes on small screens to prevent wrapping into vertical columns */
    body .hero-title,
    body .tool-header h2,
    body .lab-header h2,
    body .section-title,
    body .dash-title {
        font-size: 1.8rem !important;
        line-height: 1.5 !important;
        margin-bottom: 0.8rem !important;
        padding-top: 0.3rem !important;
        padding-bottom: 0.3rem !important;
    }
    
    body .tool-header i,
    body .lab-header i {
        font-size: 3rem !important;
        margin-bottom: 0.8rem !important;
    }
    
    body .hero-subtitle {
        font-size: 1rem !important;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        width: 100% !important;
    }
    
    .hero-buttons .btn {
        width: 100%;
        justify-content: center;
    }
    
    /* Prevent cards and forms from squeezing and creating horizontal overflow */
    body .glass-form-card,
    body .glass-lab-card,
    body .admin-card,
    body .login-card,
    body .standalone-bio,
    body #diagnostic-results {
        padding: 1.5rem 1rem !important;
        border-radius: 20px !important;
        max-width: 100% !important;
        width: 100% !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        box-sizing: border-box !important;
    }
    
    body .standalone-bio {
        flex-direction: column !important;
        text-align: center !important;
        gap: 1.5rem !important;
    }
    
    /* Layout and form alignment fixes */
    body .lab-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem !important;
    }
    
    body .form-group-mega {
        padding: 1rem !important;
    }
    
    body .form-group-mega div {
        flex-direction: column !important;
        gap: 0.8rem !important;
    }
    
    body #unit-disp {
        width: 100% !important;
        min-height: 45px !important;
    }
    
    body .radio-group {
        flex-direction: column !important;
        gap: 0.8rem !important;
        align-items: flex-start !important;
        padding: 1rem !important;
    }
    
    body .radio-label {
        font-size: 1rem !important;
        width: 100% !important;
    }
    
    body .btn-mega,
    body .btn-lab,
    body .btn-save {
        font-size: 1.15rem !important;
        padding: 0.9rem !important;
    }
    
    body .panel-grid {
        grid-template-columns: 1fr !important;
    }
    
    body .admin-card table {
        display: block !important;
        width: 100% !important;
        overflow-x: auto !important;
        -webkit-overflow-scrolling: touch !important;
    }
    
    /* Neon effect for mobile touch */
    .mobile-hover {
        background: rgba(69, 243, 255, 0.1) !important;
        color: var(--accent-cyan) !important;
        box-shadow: 0 0 15px rgba(69, 243, 255, 0.4) !important;
        transform: translateY(-2px);
        transition: all 0.2s ease;
    }
}