/* Clean Academic Aesthetic Stylesheet */

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

:root {
    --primary-color: #1a1a1a;
    --secondary-color: #4a5568;
    --accent-color: #2c5282;
    --background-color: #ffffff;
    --light-gray: #f7fafc;
    --border-color: #e2e8f0;
    --text-color: #2d3748;
    --heading-color: #1a202c;
    --link-hover: #1a365d;

    --max-width: 1100px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
}

body {
    font-family: 'Georgia', 'Times New Roman', serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--background-color);
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    color: var(--heading-color);
    line-height: 1.3;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

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

h2 {
    font-size: 1.875rem;
    margin-top: var(--spacing-md);
}

h3 {
    font-size: 1.5rem;
}

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

a {
    color: var(--accent-color);
    text-decoration: underline;
    text-decoration-thickness: 1.5px;
    text-underline-offset: 2px;
    transition: color 0.2s ease;
}

a:hover {
    color: var(--link-hover);
    text-decoration-thickness: 2px;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* Header Styles */
header {
    background-color: var(--background-color);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo img {
    height: 90px;
    width: auto;
    display: block;
}

nav ul {
    list-style: none;
    display: flex;
    gap: var(--spacing-md);
}

nav a {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    font-size: 1rem;
    font-weight: 500;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.5rem 0;
    border-bottom: 2px solid transparent;
    transition: all 0.2s ease;
}

nav a:hover,
nav a.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

/* Main Content */
main {
    min-height: calc(100vh - 200px);
    padding: var(--spacing-xl) 0;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: var(--spacing-xl);
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-sm);
}

.subtitle {
    font-size: 1.25rem;
    color: var(--secondary-color);
    font-style: italic;
}

/* Blog Posts Grid */
.blog-posts {
    display: grid;
    gap: var(--spacing-lg);
}

.post-card {
    background-color: var(--background-color);
    border: 1px solid var(--border-color);
    padding: var(--spacing-lg);
    border-radius: 4px;
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.post-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

.post-meta {
    margin-bottom: var(--spacing-sm);
}

.post-meta time {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    font-size: 0.875rem;
    color: var(--secondary-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.post-card h2 {
    margin-top: 0;
    margin-bottom: var(--spacing-sm);
    font-size: 1.75rem;
}

.post-card p {
    color: var(--text-color);
    margin-bottom: var(--spacing-md);
}

.read-more {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--accent-color);
    display: inline-block;
}

/* Content Pages (About) */
.content-page {
    max-width: 800px;
    margin: 0 auto;
}

.content-page h1 {
    border-bottom: 3px solid var(--accent-color);
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.about-content {
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: 4px;
    border-left: 4px solid var(--accent-color);
}

.about-content h2 {
    margin-top: var(--spacing-lg);
}

.about-content h2:first-child {
    margin-top: 0;
}

/* Contact Form */
.contact-intro {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background-color: var(--light-gray);
    border-radius: 4px;
}

.contact-form {
    max-width: 600px;
    background-color: var(--light-gray);
    padding: var(--spacing-lg);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--heading-color);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: 1rem;
    background-color: var(--background-color);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.1);
}

.submit-btn {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    background-color: var(--accent-color);
    color: white;
    padding: 0.875rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.submit-btn:hover {
    background-color: var(--link-hover);
}

.submit-btn:active {
    transform: translateY(1px);
}

.submit-btn:disabled {
    background-color: var(--secondary-color);
    cursor: not-allowed;
}

.form-status {
    margin-top: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: 4px;
    display: none;
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
}

.form-status.success {
    background-color: #c6f6d5;
    color: #22543d;
    border: 1px solid #9ae6b4;
}

.form-status.error {
    background-color: #fed7d7;
    color: #742a2a;
    border: 1px solid #fc8181;
}

/* Footer */
footer {
    background-color: var(--light-gray);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    text-align: center;
}

footer p {
    font-family: 'Helvetica Neue', 'Arial', sans-serif;
    color: var(--secondary-color);
    font-size: 0.875rem;
    margin: 0;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    nav ul {
        gap: var(--spacing-sm);
    }

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

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    main {
        padding: var(--spacing-md) 0;
    }
}

@media (max-width: 480px) {
    nav ul {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-xs);
    }

    .submit-btn {
        width: 100%;
    }
}