/* Oncol.net - Optimized CSS for PageSpeed 100/100 */
/* Mobile-First Responsive Design */

/* Base Reset & Typography */
:root {
    --primary: #1a5490;
    --primary-dark: #0d3255;
    --secondary: #2196F3;
    --accent: #FF6B35;
    --success: #4CAF50;
    --warning: #FFC107;
    --danger: #f44336;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --border: #dee2e6;
    --shadow: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-lg: 0 4px 8px rgba(0,0,0,0.15);
    --radius: 8px;
    --font-body: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-heading: Georgia, "Times New Roman", serif;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    --max-width: 1200px;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    line-height: 1.3;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

h1 { font-size: clamp(1.75rem, 5vw, 2.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 2rem); }
h3 { font-size: clamp(1.25rem, 3vw, 1.5rem); }

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover, a:focus {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 100;
    text-decoration: none;
}

.skip-link:focus {
    top: 0;
}

/* Container */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header */
.site-header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) 0;
    gap: var(--spacing-md);
}

.logo a {
    display: flex;
    align-items: center;
}

/* Search */
.search-container {
    flex: 1;
    max-width: 500px;
    display: none;
}

.search-form {
    display: flex;
    position: relative;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-right: 40px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
}

.search-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    padding: var(--spacing-sm);
    color: var(--text-secondary);
    cursor: pointer;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    padding: var(--spacing-sm);
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 3px;
    background: var(--text-primary);
    transition: transform 0.3s ease;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Navigation */
.main-nav {
    display: none;
    border-top: 1px solid var(--border);
}

.main-nav.active {
    display: block;
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    color: var(--text-primary);
    background: none;
    border: none;
    width: 100%;
    text-align: left;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.2s ease;
}

.nav-link:hover {
    background: var(--bg-secondary);
    text-decoration: none;
}

.dropdown-arrow {
    transition: transform 0.3s ease;
}

.nav-link[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

/* Mega Menu */
.mega-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 100;
}

.mega-menu[aria-hidden="false"] {
    display: block;
}

.mega-menu-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
}

.mega-column h3 {
    font-size: 1rem;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.mega-column ul {
    list-style: none;
}

.mega-column li {
    margin-bottom: var(--spacing-xs);
}

.mega-column a {
    color: var(--text-primary);
    padding: var(--spacing-xs) 0;
    display: block;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.hero-title {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto var(--spacing-lg);
}

/* Trust Badges */
.trust-badges {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.trust-badge svg {
    flex-shrink: 0;
}

/* Content Sections */
.content-hubs, .patient-journey, .quick-reference, .disclaimer {
    padding: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    color: var(--primary);
    margin-bottom: var(--spacing-xl);
}

/* Hub Grid */
.hub-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.hub-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hub-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.hub-icon {
    margin-bottom: var(--spacing-md);
}

.hub-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.hub-links {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.hub-links li {
    padding: var(--spacing-xs) 0;
}

.hub-cta {
    display: inline-block;
    color: var(--primary);
    font-weight: 600;
    margin-top: var(--spacing-sm);
}

/* Patient Journey Timeline */
.journey-timeline {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    position: relative;
}

.journey-step {
    background: var(--bg-primary);
    border: 2px solid var(--primary);
    border-radius: var(--radius);
    padding: var(--spacing-lg);
    position: relative;
}

.step-number {
    position: absolute;
    top: -15px;
    left: 20px;
    background: var(--primary);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* Quick Reference Grid */
.reference-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.reference-card {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius);
}

.reference-card h3 {
    color: var(--primary);
    margin-bottom: var(--spacing-md);
}

.reference-card ul {
    list-style: none;
}

.reference-card li {
    padding: var(--spacing-xs) 0;
}

/* Disclaimer */
.disclaimer {
    background: var(--bg-tertiary);
}

.disclaimer-content {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius);
    border-left: 4px solid var(--warning);
}

.disclaimer h2 {
    color: var(--danger);
    margin-bottom: var(--spacing-md);
}

.disclaimer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Footer */
.site-footer {
    background: var(--text-primary);
    color: white;
    padding: var(--spacing-xl) 0;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-section ul {
    list-style: none;
}

.footer-section a {
    color: #b0c4de;
}

.footer-section a:hover {
    color: white;
}

.disclaimer-text {
    font-size: 0.875rem;
    color: var(--warning);
    margin-top: var(--spacing-sm);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    align-items: center;
    text-align: center;
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

/* Tablet Styles */
@media (min-width: 768px) {
    .search-container {
        display: block;
    }

    .mobile-menu-toggle {
        display: none;
    }

    .main-nav {
        display: block !important;
        border-top: none;
    }

    .nav-list {
        flex-direction: row;
        justify-content: center;
    }

    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .mega-menu {
        position: absolute;
        width: auto;
        min-width: 600px;
    }

    .mega-menu-content {
        grid-template-columns: repeat(3, 1fr);
    }

    .hub-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .journey-timeline {
        grid-template-columns: repeat(2, 1fr);
    }

    .reference-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

/* Desktop Styles */
@media (min-width: 1024px) {
    .hub-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .journey-timeline {
        grid-template-columns: repeat(4, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Print Styles */
@media print {
    .site-header,
    .site-footer,
    .search-container,
    .mobile-menu-toggle,
    .main-nav {
        display: none !important;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    a {
        color: black;
        text-decoration: underline;
    }

    .container {
        max-width: 100%;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    :root {
        --primary: #003d7a;
        --text-primary: #000000;
        --bg-primary: #ffffff;
        --border: #000000;
    }
}