/* ===================================
   AGRP Bioinformatics Courses - Shared Styles
   Modern, uniform styling for all course pages
   =================================== */

/* CSS Variables for consistent theming */
:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --accent-color: #4a90c2;
    --success-color: #26a69a;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --text-color: #333;
    --text-light: #666;
    --text-muted: #888;
    --bg-color: #f8fafc;
    --white: #ffffff;
    --border-color: #e2e8f0;
    --code-bg: #2d3748;
    --code-text: #e2e8f0;
    --inline-code-bg: #edf2f7;
    --inline-code-text: #d63384;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 30px rgba(0,0,0,0.15);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    min-height: 100vh;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--white);
    min-height: 100vh;
    box-shadow: var(--shadow-lg);
}

/* Header Styles */
.header, header.page-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--white);
    padding: 2.5rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.header::before, header.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.header h1, header.page-header h1,
.header .project-name, header.page-header .project-name {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
    font-weight: 700;
}

.header .subtitle, header.page-header .subtitle,
.header .project-tagline, header.page-header .project-tagline {
    font-size: 1.2rem;
    opacity: 0.95;
    position: relative;
    z-index: 1;
}

/* Navigation */
.nav {
    background: var(--white);
    padding: 1rem;
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-md);
}

.nav-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.nav-links a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.nav-links a:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* Main Content */
.main-content, main {
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Typography */
h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 700;
}

h2 {
    font-size: 2rem;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 600;
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

h3 {
    font-size: 1.5rem;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
    color: var(--text-color);
    font-weight: 600;
}

h4 {
    font-size: 1.25rem;
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-color);
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
    color: var(--text-color);
}

/* Links */
a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

/* Lists */
ul, ol {
    margin-left: 2rem;
    margin-bottom: 1.5rem;
}

li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

/* Code Blocks */
pre {
    background: var(--code-bg);
    color: var(--code-text);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
    line-height: 1.5;
}

code {
    background: var(--inline-code-bg);
    color: var(--inline-code-text);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9em;
}

pre code {
    background: transparent;
    color: var(--code-text);
    padding: 0;
}

.language-plaintext, .highlighter-rouge {
    background: var(--inline-code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
    font-family: 'Courier New', Courier, monospace;
}

/* Info Boxes and Sections */
.info-box, .note, .warning, .tip {
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-bottom: 1.5rem;
    border-left: 4px solid;
    box-shadow: var(--shadow-sm);
}

.info-box, .note {
    background: #e3f2fd;
    border-color: var(--accent-color);
}

.warning {
    background: #fff3e0;
    border-color: var(--warning-color);
}

.tip {
    background: #e8f5e9;
    border-color: var(--success-color);
}

/* Section with Background */
.section {
    background: var(--bg-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    margin-bottom: 2rem;
    border: 1px solid var(--border-color);
}

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
    background: var(--white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

th {
    background: var(--primary-color);
    color: var(--white);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

tr:hover {
    background: var(--bg-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    background: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    text-decoration: none;
}

.btn-secondary {
    background: var(--accent-color);
}

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

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

/* Course Cards (for landing page) */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 2rem;
}

.course-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    display: block;
    border: 1px solid var(--border-color);
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    text-decoration: none;
}

.course-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    display: block;
}

.course-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 0.75rem;
}

.course-description {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1.25rem;
}

.course-type {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: var(--white);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.course-type.pdf {
    background: var(--error-color);
}

.course-type.interactive {
    background: var(--success-color);
}

/* Footer */
footer {
    background: var(--bg-color);
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
    border-top: 2px solid var(--border-color);
    color: var(--text-light);
}

/* Back to Home Link */
.back-link {
    display: inline-block;
    margin-bottom: 1rem;
    padding: 0.5rem 1rem;
    background: var(--bg-color);
    border-radius: var(--border-radius);
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.back-link:hover {
    background: var(--primary-color);
    color: var(--white);
    text-decoration: none;
}

/* Horizontal Rules */
hr {
    border: none;
    border-top: 2px solid var(--border-color);
    margin: 2rem 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header h1, header.page-header h1,
    .header .project-name, header.page-header .project-name {
        font-size: 1.75rem;
    }

    .header .subtitle, header.page-header .subtitle,
    .header .project-tagline, header.page-header .project-tagline {
        font-size: 1rem;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .main-content, main {
        padding: 1rem;
    }

    .courses-grid {
        grid-template-columns: 1fr;
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    pre {
        padding: 1rem;
        font-size: 0.8rem;
    }

    table {
        font-size: 0.9rem;
    }

    th, td {
        padding: 0.5rem;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .nav, .back-link {
        display: none;
    }

    .container {
        box-shadow: none;
    }
}