/* ==========================================================================
   Sajay Samuel - Modern Academic Profile Site
   ========================================================================== */

/* CSS Custom Properties
   ========================================================================== */
:root {
    /* Colors */
    --color-primary: #1a4971;
    --color-secondary: #6b8e6f;
    --color-accent: #d97742;
    --color-bg: #fafaf8;
    --color-text: #2d3748;
    --color-text-light: #666;
    --color-border: #e2e8f0;

    /* Typography */
    --font-heading: Georgia, 'Times New Roman', serif;
    --font-body: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-base: 18px;
    --line-height-base: 1.7;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Layout */
    --content-width: 800px;
    --border-radius: 8px;
    --transition-speed: 0.3s;
}

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

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-md);
}

h2 {
    font-size: 2rem;
    margin-top: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
    margin-top: var(--spacing-md);
}

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

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

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

ul, ol {
    margin-left: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

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

strong {
    font-weight: 600;
    color: var(--color-primary);
}

/* Layout Components
   ========================================================================== */
.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header
   ========================================================================== */
.site-header {
    background-color: white;
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.site-title {
    font-size: 1.75rem;
    margin: 0;
    color: var(--color-primary);
}

.site-title a {
    color: var(--color-primary);
    text-decoration: none;
}

.site-title a:hover {
    color: var(--color-accent);
}

/* Navigation
   ========================================================================== */
.main-nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
    margin: 0;
}

.main-nav a {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.main-nav a:hover,
.main-nav a.active {
    background-color: var(--color-primary);
    color: white;
    text-decoration: none;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: none;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
}

.menu-toggle:hover {
    background-color: var(--color-primary);
    color: white;
}

/* Hero Section
   ========================================================================== */
.hero {
    position: relative;
    height: 350px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26, 73, 113, 0.7), rgba(107, 142, 111, 0.7));
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    padding: var(--spacing-md);
}

.hero-content h1 {
    color: white;
    font-size: 3rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    margin: 0;
}

.hero-content p {
    font-size: 1.25rem;
    margin-top: var(--spacing-sm);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

/* Main Content
   ========================================================================== */
main {
    padding: var(--spacing-lg) 0;
    min-height: 60vh;
}

.content-card {
    background: white;
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: var(--spacing-md);
}

/* Profile Section (Homepage) */
.profile-section {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-md);
    align-items: start;
    margin-bottom: var(--spacing-lg);
}

.profile-image {
    width: 100%;
    border-radius: 50%;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.profile-info h2 {
    margin-top: 0;
    color: var(--color-primary);
}

.profile-info .subtitle {
    color: var(--color-text-light);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
}

/* Publications */
.book-showcase {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--color-bg);
    border-radius: var(--border-radius);
}

.book-cover {
    width: 100%;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.publications-list {
    list-style: none;
    margin-left: 0;
}

.publications-list li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

.publications-list li:last-child {
    border-bottom: none;
}

/* Contact Form */
.contact-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--color-border);
    border-radius: 4px;
    font-family: var(--font-body);
    font-size: 1rem;
    transition: border-color var(--transition-speed);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

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

/* Footer
   ========================================================================== */
.site-footer {
    background-color: var(--color-primary);
    color: white;
    padding: var(--spacing-lg) 0 var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.site-footer a {
    color: white;
}

.site-footer a:hover {
    color: var(--color-accent);
}

.footer-content {
    text-align: center;
}

.footer-content p {
    margin: var(--spacing-xs) 0;
    opacity: 0.9;
}

/* Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    :root {
        --font-size-base: 16px;
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .menu-toggle {
        display: block;
    }

    .main-nav {
        width: 100%;
        display: none;
    }

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

    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }

    .main-nav a {
        display: block;
        padding: var(--spacing-sm);
        border-bottom: 1px solid var(--color-border);
    }

    .hero {
        height: 250px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .profile-section,
    .book-showcase {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .profile-image {
        max-width: 200px;
        margin: 0 auto;
    }

    .book-cover {
        max-width: 200px;
        margin: 0 auto;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .content-card {
        padding: var(--spacing-md);
    }
}

/* Article Styles (Blog Posts)
   ========================================================================== */
.article-header {
    border-bottom: 2px solid var(--color-border);
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.article-header h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.article-header time {
    display: block;
    color: var(--color-text-light);
    font-size: 1rem;
    margin-bottom: var(--spacing-xs);
}

.article-meta {
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.article-meta .author {
    font-weight: 500;
}

/* Article Content Styling */
.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text);
}

.article-content p {
    margin-bottom: var(--spacing-md);
    text-align: justify;
}

.article-content h2 {
    font-size: 1.8rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.article-content h3 {
    font-size: 1.4rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.article-content h4 {
    font-size: 1.2rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-primary);
}

.article-content ul,
.article-content ol {
    margin-bottom: var(--spacing-md);
    margin-left: var(--spacing-lg);
}

.article-content li {
    margin-bottom: var(--spacing-sm);
}

.article-content blockquote {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    padding-left: var(--spacing-md);
    border-left: 4px solid var(--color-accent);
    background-color: var(--color-bg);
    font-style: italic;
    color: var(--color-text-light);
}

.article-content code {
    background-color: var(--color-bg);
    padding: 0.2em 0.4em;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

.article-content pre {
    background-color: var(--color-bg);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin-bottom: var(--spacing-md);
}

.article-content pre code {
    background: none;
    padding: 0;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: var(--spacing-md) 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.article-content a {
    color: var(--color-accent);
    text-decoration: underline;
    transition: color var(--transition-speed);
}

.article-content a:hover {
    color: var(--color-primary);
}

/* Video embeds */
.article-content iframe,
.article-content .jetpack-video-wrapper iframe,
.article-content .embed-ted iframe {
    max-width: 100%;
    margin: var(--spacing-md) 0;
    border-radius: var(--border-radius);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.article-content .jetpack-video-wrapper,
.article-content .embed-ted {
    margin: var(--spacing-lg) 0;
}

/* Article Footer */
.article-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.article-footer a {
    color: var(--color-primary);
    font-weight: 500;
    text-decoration: none;
    transition: color var(--transition-speed);
}

.article-footer a:hover {
    color: var(--color-accent);
}

/* Responsive Article Styles */
@media (max-width: 768px) {
    .article-header h1 {
        font-size: 1.8rem;
    }

    .article-content {
        font-size: 1rem;
    }

    .article-content p {
        text-align: left;
    }

    .article-content h2 {
        font-size: 1.5rem;
    }

    .article-content h3 {
        font-size: 1.3rem;
    }

    .article-content ul,
    .article-content ol {
        margin-left: var(--spacing-md);
    }

    .article-content iframe {
        height: 250px;
    }
}

/* Print Styles
   ========================================================================== */
@media print {
    .site-header,
    .menu-toggle,
    .hero,
    .site-footer {
        display: none;
    }

    body {
        background: white;
    }

    .content-card {
        box-shadow: none;
        padding: 0;
    }

    .article-content p {
        text-align: left;
    }
}