/* Base styles */
:root {
    --text-color: #000000;
    --background-color: #ffffff;
    --accent-color: #333333;
    --spacing-unit: 1rem;
}

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

body {
    font-family: 'IBM Plex Mono', monospace;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-unit);
}

/* Typography */
h1, h2, h3 {
    font-weight: 600;
    margin-bottom: var(--spacing-unit);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

/* Navigation */
header {
    padding: var(--spacing-unit) 0;
    border-bottom: 2px solid var(--text-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

nav ul {
    list-style: none;
    display: flex;
    gap: calc(var(--spacing-unit) * 2);
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    transition: opacity 0.2s;
}

nav a:hover {
    opacity: 0.7;
}

/* Sections */
.section {
    margin-bottom: calc(var(--spacing-unit) * 4);
    padding: calc(var(--spacing-unit) * 2) 0;
}

.content {
    max-width: 800px;
}

/* About Section */
.about-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: calc(var(--spacing-unit) * 2);
}

.about-text ul {
    list-style: none;
    margin: var(--spacing-unit) 0;
}

.about-text li {
    margin-bottom: calc(var(--spacing-unit) / 2);
}

/* Tech Stack */
.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--spacing-unit) / 2);
    margin-top: var(--spacing-unit);
}

.tech-badge {
    background-color: var(--text-color);
    color: var(--background-color);
    padding: 0.25rem 0.75rem;
    border-radius: 4px;
    font-size: 0.9rem;
}

/* Social Links */
.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
}

.social-link {
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 2px solid var(--text-color);
    transition: all 0.2s;
}

.social-link:hover {
    background-color: var(--text-color);
    color: var(--background-color);
}

/* Research Section */
.research-list {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}

.research-paper {
    border: 2px solid var(--text-color);
    padding: var(--spacing-unit);
    transition: transform 0.2s;
}

.research-paper:hover {
    transform: translateY(-4px);
}

.paper-links {
    margin-top: var(--spacing-unit);
    display: flex;
    gap: var(--spacing-unit);
}

.paper-links .link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

/* Project Grid */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin-top: var(--spacing-unit);
}

.project-card {
    border: 2px solid var(--text-color);
    padding: var(--spacing-unit);
    transition: transform 0.2s;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
    height: 100%;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: 4px 4px 0 var(--text-color);
}

.project-card h3 {
    margin-bottom: 0;
    font-size: 1.4rem;
}

.project-card p {
    flex-grow: 1;
    margin: 0;
    line-height: 1.6;
}

.project-links {
    margin-top: auto;
    display: flex;
    gap: var(--spacing-unit);
}

.project-links .link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border: 2px solid var(--text-color);
    transition: all 0.2s;
}

.project-links .link:hover {
    background-color: var(--text-color);
    color: var(--background-color);
}

/* Blog List */
.blog-list {
    display: flex;
    flex-direction: column;
    gap: calc(var(--spacing-unit) * 2);
}

.blog-post {
    border-bottom: 1px solid var(--text-color);
    padding-bottom: var(--spacing-unit);
}

.date {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin-bottom: calc(var(--spacing-unit) / 2);
}

/* Book Section */
.book-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin-top: var(--spacing-unit);
}

.book-card {
    border: 2px solid var(--text-color);
    padding: var(--spacing-unit);
    transition: transform 0.2s;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-unit);
}

.book-card:hover {
    transform: translateY(-4px);
}

.book-card h3 {
    margin-bottom: 0;
}

.book-card .author {
    color: var(--accent-color);
    font-size: 0.9rem;
    margin: 0;
}

.book-card .link {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.book-recommendation {
    margin-top: calc(var(--spacing-unit) * 2);
    text-align: center;
    padding: var(--spacing-unit);
    border: 2px solid var(--text-color);
}

/* Links */
.link {
    color: var(--text-color);
    text-decoration: none;
    font-weight: 600;
    display: inline-block;
    margin-top: var(--spacing-unit);
}

.link:hover {
    text-decoration: underline;
}

/* Footer */
footer {
    text-align: center;
    padding: calc(var(--spacing-unit) * 2) 0;
    border-top: 2px solid var(--text-color);
    margin-top: calc(var(--spacing-unit) * 4);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    nav ul {
        flex-direction: column;
        gap: var(--spacing-unit);
    }

    .about-grid {
        grid-template-columns: 1fr;
    }

    .project-grid,
    .book-grid {
        grid-template-columns: 1fr;
    }

    .social-links {
        flex-direction: column;
    }

    .social-link {
        width: 100%;
        justify-content: center;
    }

    .tech-stack {
        justify-content: center;
    }
}

/* Project Title Links */
.project-title-link {
    color: var(--text-color);
    text-decoration: none;
    transition: opacity 0.2s;
}

.project-title-link:hover {
    opacity: 0.7;
}

/* Project Page Styles */
.project-hero {
    text-align: center;
    padding: calc(var(--spacing-unit) * 3) 0;
    border-bottom: 2px solid var(--text-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

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

.project-subtitle {
    font-size: 1.2rem;
    color: var(--accent-color);
    margin-bottom: calc(var(--spacing-unit) * 2);
}

.project-cta {
    margin-top: calc(var(--spacing-unit) * 2);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background-color: var(--text-color);
    color: var(--background-color);
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s;
    border: 2px solid var(--text-color);
}

.cta-button:hover {
    background-color: var(--background-color);
    color: var(--text-color);
}

.cta-button.secondary {
    background-color: var(--background-color);
    color: var(--text-color);
}

.cta-button.secondary:hover {
    background-color: var(--text-color);
    color: var(--background-color);
}

/* Stats Grid */
.problem-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin: calc(var(--spacing-unit) * 2) 0;
}

.stat-card {
    text-align: center;
    padding: var(--spacing-unit);
    border: 2px solid var(--text-color);
}

.stat-card h3 {
    font-size: 2.5rem;
    margin-bottom: calc(var(--spacing-unit) / 2);
    color: var(--text-color);
}

.stat-card p {
    margin: 0;
    font-size: 0.9rem;
}

/* Feature Grid */
.solution-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin: calc(var(--spacing-unit) * 2) 0;
}

.feature-card {
    padding: var(--spacing-unit);
    border: 2px solid var(--text-color);
    text-align: center;
    transition: transform 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
}

.feature-card i {
    font-size: 2rem;
    margin-bottom: var(--spacing-unit);
}

.feature-card h3 {
    margin-bottom: calc(var(--spacing-unit) / 2);
}

/* Workflow */
.workflow {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin: calc(var(--spacing-unit) * 2) 0;
}

.workflow-step {
    text-align: center;
    padding: var(--spacing-unit);
}

.step-number {
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background-color: var(--text-color);
    color: var(--background-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 auto var(--spacing-unit) auto;
}

/* Impact Grid */
.impact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: calc(var(--spacing-unit) * 2);
    margin: calc(var(--spacing-unit) * 2) 0;
}

.impact-card {
    padding: var(--spacing-unit);
    border: 2px solid var(--text-color);
    transition: transform 0.2s;
}

.impact-card:hover {
    transform: translateY(-4px);
}

.impact-card h3 {
    margin-bottom: calc(var(--spacing-unit) / 2);
}

/* CTA Section */
.cta-section {
    text-align: center;
    padding: calc(var(--spacing-unit) * 3);
    border: 2px solid var(--text-color);
    margin: calc(var(--spacing-unit) * 2) 0;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-unit);
    justify-content: center;
    margin-top: calc(var(--spacing-unit) * 2);
    flex-wrap: wrap;
}

/* Responsive adjustments for project page */
@media (max-width: 768px) {
    .project-hero h1 {
        font-size: 2rem;
    }
    
    .problem-stats,
    .solution-features,
    .workflow,
    .impact-grid {
        grid-template-columns: 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-button {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}