/* --- CU Global Palette & Fonts --- */
:root {
    --color-background: #FFFFFF; /* Pure White */
    --color-foreground: #000000; /* Pure Black for text/elements */
    --color-accent-red: #8B0000; /* Deep Royal Red */
    --color-accent-gold: #DAA520; /* Bright Luxurious Gold */
    --color-subtle-bg: #f8f8f8; /* A very light grey for off-white backgrounds */
    --font-main: 'Inter', sans-serif;
    --font-heading: 'Merriweather', serif;
}

/* --- General Body & Typography --- */
body {
    font-family: var(--font-main);
    line-height: 1.6;
    background-color: var(--color-subtle-bg);
    color: var(--color-foreground);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Utility Classes */
.hidden {
    display: none;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 800;
    color: var(--color-foreground);
    line-height: 1.2;
    letter-spacing: -0.03em;
}

h1 {
    font-size: 2.5rem;
    text-align: center;
    padding: 1rem 0;
    color: var(--color-foreground);
}

h2 {
    font-size: 2rem;
    border-bottom: 2px solid var(--color-accent-red);
    padding-bottom: 10px;
    margin-top: 0;
    margin-bottom: 20px;
}

h3 {
    font-size: 1.6rem;
    color: var(--color-accent-red);
    margin-top: 25px;
}

p {
    margin-bottom: 1rem;
}

a {
    color: var(--color-accent-red);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--color-accent-gold);
    text-decoration: underline;
}

/* --- Layout Containers --- */
#course-container {
    max-width: 1400px;
    margin: 0 auto;
    background-color: var(--color-background);
    box-shadow: 0 5px 25px rgba(0,0,0,0.1);
}

header {
    background: linear-gradient(135deg, #e0e0e0, #b0b0b0);
    padding: 20px;
    border-bottom: 4px solid var(--color-accent-gold); /* Gold Accent */
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 30px;
    background-color: var(--color-foreground);
    color: #C0C0C0;
    border-top: 1px solid var(--color-accent-red);
    font-size: 0.9em;
}

#content-container {
    display: flex;
    padding: 20px;
}

/* --- Main Navigation (Tabs) --- */
#main-navigation {
    background-color: #1c1c1c; /* Slightly off-black */
}

.main-nav {
    display: flex;
    justify-content: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.main-nav a {
    display: block;
    padding: 15px 25px;
    color: var(--color-background);
    text-decoration: none;
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 1rem;
    transition: background-color 0.3s ease, color 0.3s ease;
    border-bottom: 3px solid transparent;
}

.main-nav a:hover {
    background-color: var(--color-accent-red);
    text-decoration: none;
}

.main-nav a.active {
    background-color: var(--color-background);
    color: var(--color-accent-red);
    border-bottom: 3px solid var(--color-accent-gold); /* Accent color */
}

/* --- Sub Navigation (Side Menu) --- */
#sub-navigation {
    flex: 0 0 300px; /* Do not grow, do not shrink, base width 300px */
    margin-right: 30px;
    padding-right: 20px;
    border-right: 1px solid #e0e0e0;
}

#sub-navigation h2 {
    font-size: 1.5rem;
    color: var(--color-accent-red);
}

.sub-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sub-nav li a {
    display: block;
    padding: 12px 15px;
    border-radius: 5px;
    margin-bottom: 5px;
    transition: background-color 0.3s ease, color 0.3s ease;
    font-weight: bold;
    border-left: 3px solid transparent;
}

.sub-nav li a:hover {
    background-color: var(--color-subtle-bg); /* Light tint */
    text-decoration: none;
    border-left: 3px solid var(--color-accent-gold);
}

.sub-nav li a.active {
    background-color: var(--color-accent-red);
    color: var(--color-background);
    border-left: 3px solid var(--color-accent-gold);
}

/* --- Main Content Area --- */
#content-display {
    flex: 1; /* Take up remaining space */
    min-width: 0; /* Prevents flexbox overflow issues */
}

/* For loading state */
.loader {
    text-align: center;
    padding: 50px;
    font-size: 1.5rem;
    color: #555;
}

/* --- Content Styling (Tables, Blockquotes, etc.) --- */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    font-size: 0.9em;
}

table thead {
    background-color: var(--color-foreground);
    color: var(--color-background);
    text-align: left;
}

table th, table td {
    padding: 12px 15px;
    border: 1px solid #ddd;
}

table tbody tr {
    border-bottom: 1px solid #ddd;
}

table tbody tr:nth-of-type(even) {
    background-color: var(--color-subtle-bg);
}

table tbody tr:last-of-type {
    border-bottom: 2px solid var(--color-accent-red);
}

table tbody tr:hover {
    background-color: #fceecb; /* Light gold tint */
}

blockquote {
    border-left: 5px solid var(--color-accent-gold);
    background-color: var(--color-subtle-bg);
    margin: 20px 0;
    padding: 15px 20px;
    font-style: italic;
}

/* --- Responsive Design --- */
@media (max-width: 992px) {
    #content-container {
        flex-direction: column;
    }
    #sub-navigation {
        margin-right: 0;
        margin-bottom: 30px;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
        padding-right: 0;
        padding-bottom: 20px;
        flex-basis: auto; /* Reset flex basis */
    }
    .main-nav {
        flex-direction: column;
        align-items: center;
    }
    .main-nav a {
        width: 100%;
        text-align: center;
        border-bottom: 1px solid #333;
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 1.8rem;
    }
    .main-nav a {
        padding: 12px 15px;
    }
}

/* --- Citation Section Styles --- */
.citations {
    margin: 3rem 0;
    padding: 2rem;
    background: var(--color-subtle-bg);
    border-radius: 8px;
    border-top: 3px solid var(--color-accent-red);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.section-title {
    color: var(--color-accent-red);
    border-bottom: 2px solid var(--color-accent-gold);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

.citation-notice {
    background: #fff9e6;
    padding: 1rem;
    border-left: 4px solid var(--color-accent-gold);
    margin-bottom: 2rem;
    border-radius: 4px;
}

.citation-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.citation-list li {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: white;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.citation-list li:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.citation-list a {
    color: var(--color-accent-red);
    text-decoration: none;
    font-weight: 500;
    display: block;
    margin-bottom: 0.5rem;
}

.citation-list a:hover {
    color: var(--color-accent-gold);
    text-decoration: underline;
}

.citation-meta {
    display: block;
    color: #666;
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

.citation-description {
    display: block;
    color: #555;
    font-size: 0.9rem;
    margin-top: 0.5rem;
    line-height: 1.4;
}

.citation-metadata {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #ddd;
    font-size: 0.9rem;
    color: #666;
}

.last-updated {
    margin-bottom: 0.5rem;
}

.citation-note {
    font-style: italic;
}

/* Citation Links */
.citation-link {
    font-size: 0.8em;
    vertical-align: super;
    color: var(--color-accent-red);
    text-decoration: none;
    margin-left: 0.25rem;
    transition: color 0.3s ease;
}

.citation-link:hover {
    color: var(--color-accent-gold);
    text-decoration: underline;
}

/* Citation Section Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
    .citation-list li {
        transition: none;
    }
}

/* Citation Section High Contrast Mode */
@media (prefers-contrast: high) {
    .citation-list a {
        color: #0000EE;
    }
    .citation-list a:visited {
        color: #551A8B;
    }
}

/* Citation Section Print Styles */
@media print {
    .citations {
        background: none;
        box-shadow: none;
        break-inside: avoid;
    }
    
    .citation-list li {
        background: none;
        box-shadow: none;
        break-inside: avoid;
    }
    
    .citation-list a::after {
        content: " (" attr(href) ")";
        font-size: 0.9em;
    }
}

/* --- Component Grids & Cards --- */
.components-grid, .documentation-grid, .protocols-grid, .risk-grid, .support-grid, .implementation-grid, .action-grid,
.prep-grid, .guidelines-grid, .responsibility-grid, .emergency-grid, .maintenance-grid,
.resources-grid, .education-grid, .community-grid, .tools-grid, .ongoing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.component-card, .documentation-card, .protocol-card, .risk-card, .support-card, .implementation-card, .action-card,
.prep-card, .guideline-card, .responsibility-card, .emergency-card, .maintenance-card,
.resource-card, .education-card, .community-card, .tool-card, .ongoing-card {
    background: #ffffff;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    border-top: 3px solid var(--color-accent-red);
}

.component-card:hover, .documentation-card:hover, .protocol-card:hover, 
.risk-card:hover, .support-card:hover, .implementation-card:hover, .action-card:hover,
.prep-card:hover, .guideline-card:hover, .responsibility-card:hover, .emergency-card:hover, .maintenance-card:hover,
.resource-card:hover, .education-card:hover, .community-card:hover, .tool-card:hover, .ongoing-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}

/* Card Headers */
.component-card h4, .documentation-card h4, .protocol-card h4, 
.risk-card h4, .support-card h4, .implementation-card h4, .action-card h4,
.prep-card h4, .guideline-card h4, .responsibility-card h4, .emergency-card h4, .maintenance-card h4,
.resource-card h4, .education-card h4, .community-card h4, .tool-card h4, .ongoing-card h4 {
    color: var(--color-foreground);
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 1.2rem;
    border-bottom: 2px solid var(--color-accent-gold);
    padding-bottom: 0.5rem;
}

/* Card Lists */
.component-card ul, .documentation-card ul, .protocol-card ul, 
.risk-card ul, .support-card ul, .implementation-card ul, .action-card ul,
.prep-card ul, .guideline-card ul, .responsibility-card ul, .emergency-card ul, .maintenance-card ul,
.resource-card ul, .education-card ul, .community-card ul, .tool-card ul, .ongoing-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.component-card li, .documentation-card li, .protocol-card li, 
.risk-card li, .support-card li, .implementation-card li, .action-card li,
.prep-card li, .guideline-card li, .responsibility-card li, .emergency-card li, .maintenance-card li,
.resource-card li, .education-card li, .community-card li, .tool-card li, .ongoing-card li {
    margin-bottom: 0.75rem;
    color: #333;
    display: flex;
    align-items: baseline;
}

.component-card li:before, .documentation-card li:before, .protocol-card li:before,
.risk-card li:before, .support-card li:before, .implementation-card li:before, .action-card li:before,
.prep-card li:before, .guideline-card li:before, .responsibility-card li:before, .emergency-card li:before, .maintenance-card li:before,
.resource-card li:before, .education-card li:before, .community-card li:before, .tool-card li:before, .ongoing-card li:before {
    content: "✔️";
    color: var(--color-accent-red);
    font-weight: bold;
    margin-right: 0.75rem;
}

/* Section Headers */
.section-header {
    margin-bottom: 2rem;
}

.section-header h2 {
    color: var(--color-foreground);
    font-size: 2rem;
    margin-bottom: 1rem;
    border-bottom: 3px solid var(--color-accent-gold);
    padding-bottom: 0.5rem;
}

.section-intro {
    color: var(--color-foreground);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* Component Sections */
.plan-components, .safety-documentation, .safety-protocols, 
.risk-management, .support-network, .plan-implementation {
    margin-bottom: 3rem;
}

.plan-components h3, .safety-documentation h3, .safety-protocols h3,
.risk-management h3, .support-network h3, .plan-implementation h3 {
    color: var(--color-accent-red);
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent-gold);
}

/* Highlight Quotes */
.highlight-quote {
    background: var(--color-subtle-bg);
    border-left: 4px solid var(--color-accent-red);
    padding: 1.25rem;
    margin: 2rem 0;
    border-radius: 0 4px 4px 0;
    color: #333;
    font-size: 1.1rem;
    line-height: 1.6;
}

/* Tooltip Styles */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]:before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.5rem 0.75rem;
    background: var(--color-foreground);
    color: var(--color-background);
    border-radius: 4px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s ease;
    z-index: 1000;
}

[data-tooltip]:hover:before {
    opacity: 1;
    visibility: visible;
    bottom: calc(100% + 5px);
}

/* Footer */
.section-footer {
    color: var(--color-foreground);
    font-size: 1.1rem;
    line-height: 1.6;
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #e0e0e0;
}

/* Accessibility Enhancements */
@media (prefers-reduced-motion: reduce) {
    .component-card, .documentation-card, .protocol-card, 
    .risk-card, .support-card, .implementation-card, .action-card,
    .citation-list li {
        transition: none;
    }
}

/* High Contrast Mode */
@media (prefers-contrast: high) {
    .citation-list a {
        color: #0000EE;
    }
    .citation-list a:visited {
        color: #551A8B;
    }
}

/* Print Styles */
@media print {
    .component-card, .documentation-card, .protocol-card, 
    .risk-card, .support-card, .implementation-card, .action-card {
        break-inside: avoid;
        border: 1px solid #000;
        box-shadow: none;
    }
    
    .highlight-quote {
        border: 1px solid #000;
        border-left: 3px solid #000;
    }

    .citations {
        background: none;
        box-shadow: none;
        break-inside: avoid;
    }
    
    .citation-list li {
        background: none;
        box-shadow: none;
        break-inside: avoid;
    }
    
    .citation-list a::after {
        content: " (" attr(href) ")";
        font-size: 0.9em;
    }
}

/* Citation Styles */
#references {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--color-subtle-bg);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

#references h3 {
    color: var(--color-accent-red);
    border-bottom: 2px solid var(--color-accent-gold);
    padding-bottom: 0.5rem;
    margin-bottom: 1.5rem;
}

#references ol {
    list-style: none;
    padding: 0;
    margin: 0;
}

#references li {
    margin-bottom: 1rem;
    padding: 1rem;
    background: white;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    transition: transform 0.2s ease;
}

#references li:hover {
    transform: translateX(5px);
}

#references a {
    color: var(--color-accent-red);
    text-decoration: none;
    font-weight: 500;
    display: block;
    margin-bottom: 0.5rem;
}

#references a:hover {
    color: var(--color-accent-gold);
    text-decoration: underline;
}

.reference-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.reference-card {
    background: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    border-top: 3px solid var(--color-accent-red);
}

.reference-card::after {
    content: "[" attr(id) "]";
    position: absolute;
    top: 20px;
    right: 20px;
    color: var(--color-accent-red);
    font-weight: 500;
    font-size: 0.9rem;
    opacity: 0.8;
}

.reference-card h4 {
    color: var(--color-foreground);
    margin: 0 0 10px 0;
    font-size: 1.1rem;
    line-height: 1.4;
    padding-right: 50px; /* Make room for the reference number */
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.reference-card h4::after {
    content: "[" attr(data-ref) "]";
    color: var(--color-accent-red);
    font-size: 0.9rem;
    font-weight: 500;
    margin-left: 10px;
    flex-shrink: 0;
}

.reference-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.reference-card .citation-link {
    display: block;
    color: var(--color-accent-red);
    margin: 10px 0;
    font-weight: 500;
    text-decoration: none;
}

.reference-card .citation-link:hover {
    color: var(--color-accent-gold);
    text-decoration: underline;
}

.reference-card .citation-meta {
    display: block;
    color: #666;
    font-size: 0.9rem;
    margin-top: 10px;
}

.reference-card .citation-description {
    color: #555;
    font-size: 0.9rem;
    margin-top: 10px;
    line-height: 1.5;
}

.course-references,
.external-references {
    margin: 30px 0;
}

.course-references h3,
.external-references h3 {
    color: var(--color-accent-red);
    border-bottom: 2px solid var(--color-accent-gold);
    padding-bottom: 10px;
    margin-bottom: 20px;
}

.citation-notice {
    background-color: var(--color-subtle-bg);
    border-left: 4px solid var(--color-accent-red);
    padding: 15px 20px;
    margin: 20px 0;
    border-radius: 0 4px 4px 0;
}

.citation-notice p {
    margin: 0;
    color: #333;
}

.citation-metadata {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
    color: #666;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .reference-grid {
        grid-template-columns: 1fr;
    }
    
    .reference-card {
        margin-bottom: 15px;
    }
}

/* --- Time Tracking Styles --- */
.time-tracking-display {
    text-align: center;
    margin: 10px 0;
    padding: 10px 15px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
    font-size: 14px;
    color: #495057;
    border: 1px solid #dee2e6;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.time-label {
    font-weight: 600;
    color: var(--color-foreground);
}

.time-display {
    font-weight: bold;
    color: var(--color-accent-red);
    font-size: 16px;
    padding: 2px 8px;
    background-color: rgba(255, 255, 255, 0.8);
    border-radius: 4px;
}

.timer-status-wrapper {
    font-size: 13px;
}

.timer-status {
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
    text-transform: uppercase;
    transition: all 0.3s ease;
}

.timer-status.active {
    background-color: #d4edda;
    color: #155724;
    animation: pulse 2s infinite;
}

.timer-status.paused {
    background-color: #fff3cd;
    color: #856404;
}

.timer-status.loading {
    background-color: #d1ecf1;
    color: #0c5460;
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

/* Responsive adjustments for time tracking */
@media (max-width: 768px) {
    .time-tracking-display {
        flex-direction: column;
        gap: 5px;
        padding: 15px 10px;
    }
    
    .timer-status-wrapper {
        margin-top: 5px;
    }
    
    .time-display {
        font-size: 18px;
    }
}