:root {
    --bg-main: #ffffff;
    --bg-sidebar: #f8f9fa;
    --text-main: #333333;
    --text-muted: #555555;
    --accent-primary: #0056b3;
    --accent-secondary: #0056b3;
    --border-color: #e9ecef;
}

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

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    overflow-x: hidden;
    line-height: 1.7;
    display: flex;
}

/* Sidebar Layout */
.sidebar {
    width: 280px;
    height: 100vh;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    overflow-y: auto;
    padding: 2rem 1rem;
    z-index: 100;
}

.sidebar-logo {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 2rem;
    padding-left: 1rem;
}

.sidebar-logo a {
    color: var(--text-main);
    text-decoration: none;
}

.sidebar-logo span {
    color: var(--accent-primary);
}

.sidebar-nav {
    list-style: none;
}

.sidebar-nav > li {
    margin-bottom: 1.5rem;
}

.sidebar-category {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 700;
    margin-bottom: 0.5rem;
    padding-left: 1rem;
    letter-spacing: 1px;
}

.sidebar-subnav {
    list-style: none;
}

.sidebar-subnav li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text-main);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 0.95rem;
}

.sidebar-subnav li a:hover,
.sidebar-subnav li a.active {
    background: #e2e6ea;
    color: var(--accent-primary);
    font-weight: 600;
}

/* Main Content Area */
.main-content {
    margin-left: 280px;
    width: calc(100% - 280px);
    min-height: 100vh;
    padding: 4rem;
}

.content-wrapper {
    max-width: 800px;
    margin: 0 auto;
}

/* Typography & Content Styles */
h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
    color: var(--text-main);
}

h2 {
    font-size: 1.8rem;
    margin-top: 3rem;
    margin-bottom: 1rem;
    color: var(--text-main);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.4rem;
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    color: var(--text-main);
}

p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-muted);
}

ul, ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
    color: var(--text-muted);
}

ul li, ol li {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

blockquote {
    border-left: 4px solid var(--accent-primary);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-main);
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 4px;
}

a {
    color: var(--accent-primary);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.highlight {
    color: var(--accent-primary);
}

/* Cards (for the homepage) */
.cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.process-card {
    background: #ffffff;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-decoration: none;
    display: block;
    color: var(--text-main);
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.process-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 15px rgba(0,0,0,0.1);
    text-decoration: none;
}

/* Navigation Buttons */
.page-nav {
    display: flex;
    justify-content: space-between;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.nav-btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.2s ease;
    font-weight: 600;
}

.nav-btn:hover {
    background: var(--accent-primary);
    color: #ffffff;
    text-decoration: none;
}

/* Quiz Styles */
.quiz-container {
    background: #f8f9fa;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    margin-top: 2rem;
}

.question-block {
    margin-bottom: 2rem;
}

.question-block h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-main);
}

.option-label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    color: var(--text-muted);
    cursor: pointer;
}

.option-label input {
    margin-right: 0.5rem;
}

.submit-btn {
    background: var(--accent-primary);
    color: white;
    border: none;
    padding: 0.8rem 2rem;
    font-size: 1.1rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 600;
}

.submit-btn:hover {
    background: #004494;
}

#quiz-result {
    margin-top: 2rem;
    font-size: 1.3rem;
    font-weight: bold;
}

.correct-answer {
    color: #28a745;
    font-weight: 600;
}

.wrong-answer {
    color: #dc3545;
    font-weight: 600;
}

/* Responsive */
@media (max-width: 900px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .main-content {
        margin-left: 0;
        width: 100%;
        padding: 2rem;
    }
    
    body {
        flex-direction: column;
    }
}


/* Accessibility Focus Outlines */
a:focus-visible, button:focus-visible, input:focus-visible {
    outline: 3px solid var(--accent-primary, #2980b9);
    outline-offset: 2px;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--accent-primary, #2980b9);
    color: white;
    padding: 8px;
    z-index: 100;
    transition: top 0.2s;
    text-decoration: none;
    font-weight: bold;
}
.skip-link:focus {
    top: 0;
}