/* ========================================
   Faisal Hakimi - Academic Portfolio
   Clean LaTeX-inspired design (Multi-page)
   ======================================== */

:root {
    --color-primary: #1a1a1a;
    --color-secondary: #333333;
    --color-accent: #2c5282;
    --color-text: #1a1a1a;
    --color-text-light: #4a5568;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e2e8f0;
    --font-serif: 'EB Garamond', Georgia, serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1100px;
}

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

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Typography */
h1, h2, h3, h4 {
    font-family: var(--font-serif);
    font-weight: 500;
    line-height: 1.3;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p { margin-bottom: 1rem; }

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Layout */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 1rem 0;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
}

.subsection-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 2.5rem 0 1.5rem;
    color: var(--color-text-light);
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--color-text-light);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.2s ease;
    padding-bottom: 2px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

.nav-links a.active {
    border-bottom: 2px solid var(--color-primary);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: 0.3s;
}

/* Hero Section (Homepage only) */
.hero {
    padding-top: 6rem;
    padding-bottom: 0.5rem;
    background: var(--color-bg);
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: flex-start;
}

.hero-text {
    flex: 1;
    padding-right: 2rem;
}

.hero-image {
    flex-shrink: 0;
}

.hero-text h1 {
    margin-bottom: 0.25rem;
    font-size: 2.5rem;
    letter-spacing: -0.02em;
}

.hero-text .title {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 0.1rem;
}

.hero-text .affiliation {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.hero-links {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.hero-bio {
}

.hero-bio p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.55;
    margin-bottom: 0.5rem;
}

.hero-bio p:last-child {
    margin-bottom: 0;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: 3px;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-secondary);
    color: white;
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
}

.avatar-placeholder {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 500;
}

.avatar-img {
    width: 300px;
    height: auto;
    border-radius: 8px;
    border: 3px solid var(--color-border);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

/* Page Main (for inner pages) */
.page-main {
    padding-top: 5rem;
    flex: 1;
}

.page-title {
    font-size: 2.25rem;
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid var(--color-primary);
}

.page-intro {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 700px;
    margin-bottom: 3rem;
}

/* Profile / Skills */
.profile-content {
    max-width: 800px;
    margin-bottom: 2rem;
}

.profile-content p {
    font-size: 1.05rem;
    color: var(--color-text-light);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.skill-category {
    padding: 1.25rem;
    background: var(--color-bg-alt);
    border-left: 3px solid var(--color-primary);
}

.skill-category h4 {
    font-family: var(--font-sans);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.skill-category p {
    margin: 0;
    font-size: 0.95rem;
}

/* Quick Links (Homepage) */
.quick-links {
    margin-top: 3rem;
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.quick-link-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-primary);
    font-weight: 500;
    transition: all 0.2s ease;
}

.quick-link-card:hover {
    border-color: var(--color-accent);
    background: white;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}

.quick-icon {
    font-size: 1.5rem;
}

/* Research Interests */
.research-compact {
    max-width: 800px;
    margin-bottom: 2rem;
}

.research-compact p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 1rem;
}

.research-compact p:last-child {
    margin-bottom: 0;
}

.research-list {
    max-width: 800px;
    margin-bottom: 1rem;
}

.research-entry {
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.research-entry:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.research-entry h4 {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--color-primary);
}

.research-entry p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.6;
}

/* Projects */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--color-bg-alt);
    padding: 2rem;
    border-radius: 4px;
    border: 1px solid var(--color-border);
    transition: box-shadow 0.2s ease;
}

.project-card:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.project-header {
    margin-bottom: 1rem;
}

.project-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    background: rgba(44, 82, 130, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 2px;
}

.project-tag.award-tag {
    background: rgba(183, 121, 31, 0.1);
    color: #b7791f;
}

.project-card h3 {
    margin-bottom: 0.5rem;
}

.project-subtitle {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.project-card > p:last-of-type {
    font-size: 0.95rem;
    color: var(--color-text-light);
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.project-tech span {
    font-size: 0.8rem;
    color: var(--color-text-light);
    background: var(--color-bg);
    padding: 0.25rem 0.75rem;
    border-radius: 2px;
    border: 1px solid var(--color-border);
}

/* Publications */
.publications-list {
    max-width: 800px;
}

.publication-category {
    margin-bottom: 3rem;
}

.publication-category h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.publication-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--color-bg-alt);
    border-radius: 4px;
    margin-bottom: 1rem;
}

.pub-marker {
    width: 4px;
    background: var(--color-primary);
    border-radius: 2px;
    flex-shrink: 0;
}

.pub-marker.award {
    background: #b7791f;
}

.pub-content { flex: 1; }

.pub-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.pub-authors {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.pub-details {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.pub-status {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--color-accent);
    margin-top: 0.75rem;
}

.pub-status.award {
    color: #b7791f;
}

/* Timeline / Experience */
.timeline {
    max-width: 800px;
}

.timeline-section {
    margin-bottom: 3rem;
}

.timeline-heading {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.timeline-item {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--color-border);
}

.timeline-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.timeline-date {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
}

.timeline-content h3 {
    margin-bottom: 0.25rem;
}

.timeline-org {
    font-size: 0.95rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.timeline-content ul {
    list-style: none;
    padding: 0;
}

.timeline-content li {
    position: relative;
    padding-left: 1.25rem;
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.timeline-content li::before {
    content: "–";
    position: absolute;
    left: 0;
    color: var(--color-text-light);
}

.gpa {
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.coursework {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.cert-item {
    padding: 1.25rem;
    background: var(--color-bg-alt);
    border-left: 3px solid var(--color-accent);
}

.cert-item h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.cert-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin: 0;
}

.languages-grid {
    display: flex;
    gap: 2rem;
}

.language-item {
    display: flex;
    flex-direction: column;
    padding: 1rem 1.5rem;
    background: var(--color-bg-alt);
    border-radius: 4px;
}

.language-name {
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.language-level {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* Contact */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1rem;
    max-width: 700px;
}

.contact-item {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    background: var(--color-bg-alt);
    border-radius: 4px;
    border: 1px solid var(--color-border);
    transition: border-color 0.2s ease;
    color: inherit;
}

.contact-item:hover {
    border-color: var(--color-accent);
}

.contact-icon {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.contact-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-light);
    margin-bottom: 0.25rem;
}

.contact-value {
    font-size: 0.95rem;
    color: var(--color-primary);
}

.contact-note-section {
    margin-top: 3rem;
}

.contact-note {
    font-size: 0.9rem;
    color: var(--color-text-light);
    font-style: italic;
}

/* Footer */
.footer {
    padding: 2.5rem 2rem;
    text-align: center;
    border-top: 1px solid var(--color-border);
    margin-top: auto;
}

.footer p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: var(--color-text-light);
    margin: 0 0.5rem;
}

.footer-links a:hover {
    color: var(--color-primary);
}

/* Academic List Style (Wikipedia/LaTeX) */
.academic-list {
    max-width: 800px;
}

.academic-item {
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--color-border);
}

.academic-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.academic-item h4 {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
    color: var(--color-primary);
}

.academic-item h4 a {
    color: var(--color-accent);
}

.academic-item h4 a:hover {
    text-decoration: underline;
}

.academic-item p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.6;
}

.academic-item p em {
    color: var(--color-text-light);
    font-style: italic;
}

.view-all-link {
    margin-bottom: 2rem;
}

.view-all-link a {
    font-size: 0.9rem;
    font-weight: 500;
}

/* Projects Page (LaTeX style) */
.projects-list {
    max-width: 800px;
}

.project-entry {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.project-entry:last-child {
    border-bottom: none;
}

.project-entry h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.project-tech-line {
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    font-style: italic;
}

.project-entry > p:last-child {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin: 0;
    line-height: 1.6;
}

/* Publications Page (LaTeX style) */
.pub-entry {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.pub-entry:last-child {
    border-bottom: none;
}

.pub-title-text {
    font-family: var(--font-serif);
    font-size: 1.05rem;
    font-weight: 500;
    font-style: italic;
    margin-bottom: 0.5rem;
}

.pub-focus {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

.pub-status-text {
    font-size: 0.9rem;
    color: var(--color-accent);
    margin: 0;
}

/* Experience Page (LaTeX style) */
.experience-list {
    max-width: 800px;
}

.exp-entry {
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.exp-entry:last-child {
    border-bottom: none;
}

.exp-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.25rem;
}

.exp-header h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
}

.exp-date {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

.exp-org {
    font-size: 0.95rem;
    color: var(--color-accent);
    margin-bottom: 0.75rem;
}

.exp-details {
    list-style: none;
    padding: 0;
    margin: 0;
}

.exp-details li {
    position: relative;
    padding-left: 1rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.4rem;
    line-height: 1.5;
}

.exp-details li::before {
    content: "–";
    position: absolute;
    left: 0;
}

.edu-entry {
    margin-bottom: 1.5rem;
}

.cert-desc {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: 0.5rem;
    line-height: 1.6;
}

/* Contact Page (LaTeX style) */
.contact-list {
    max-width: 500px;
}

.contact-entry {
    display: flex;
    margin-bottom: 0.75rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.contact-entry:last-child {
    border-bottom: none;
}

.contact-entry .contact-label {
    width: 100px;
    flex-shrink: 0;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-light);
}

.contact-entry a,
.contact-entry span:last-child {
    font-size: 0.95rem;
    color: var(--color-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.25rem; }
    
    .section { padding: 1.5rem 0; }
    
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-bg);
        padding: 1rem 1.5rem;
        gap: 0.75rem;
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    }
    
    .nav-links.active { display: flex; }
    .nav-toggle { display: flex; }
    
    .hero { 
        padding: 5rem 1rem 1.5rem;
    }
    
    .hero-content {
        flex-direction: column-reverse;
        text-align: center;
        align-items: center;
        gap: 1.5rem;
        padding: 0 0.5rem;
    }
    
    .hero-image {
        display: flex;
        justify-content: center;
    }
    
    .hero-text {
        padding-right: 0;
    }
    
    .hero-text h1 { font-size: 1.75rem; }
    .hero-text .title { font-size: 1rem; }
    .hero-text .affiliation { font-size: 0.9rem; margin-bottom: 0.75rem; }
    
    .hero-links { 
        justify-content: center;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .hero-bio {
        text-align: left;
    }
    
    .hero-bio p {
        font-size: 0.85rem;
        line-height: 1.5;
    }
    
    .avatar-img {
        width: 200px;
    }
    
    .container { padding: 0 1rem; }
    .page-main { padding-top: 4rem; }
    .page-title { font-size: 1.5rem; }
    .page-intro { font-size: 0.95rem; }
    
    .section-title {
        font-size: 1.25rem;
        margin-bottom: 1rem;
    }
    
    .skills-grid { grid-template-columns: 1fr; }
    
    .skill-category {
        padding: 1rem;
    }
    
    .skill-category h4 { font-size: 0.8rem; }
    .skill-category p { font-size: 0.9rem; }
    
    .research-compact p,
    .research-entry p,
    .academic-item p {
        font-size: 0.9rem;
    }
    
    .research-entry h4,
    .academic-item h4 {
        font-size: 1rem;
    }
    
    /* Experience page */
    .exp-header {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .exp-header h3 { font-size: 1rem; }
    .exp-date { font-size: 0.85rem; }
    .exp-org { font-size: 0.9rem; }
    .exp-details li { font-size: 0.85rem; }
    
    /* Contact page */
    .contact-entry {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .contact-entry .contact-label {
        width: auto;
    }
    
    /* Publications */
    .pub-title-text { font-size: 1rem; }
    .pub-focus { font-size: 0.9rem; }
    
    /* Footer */
    .footer {
        padding: 1.5rem 1rem;
    }
    
    .footer p { font-size: 0.85rem; }
}

@media (max-width: 480px) {
    h1 { font-size: 1.5rem; }
    
    .hero {
        padding: 4.5rem 0.75rem 1rem;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
    
    .avatar-img {
        width: 160px;
    }
    
    .container { padding: 0 0.75rem; }
    
    .nav-container {
        padding: 0.75rem 1rem;
    }
    
    .nav-logo { font-size: 1.25rem; }
    .links-grid { grid-template-columns: 1fr; }
    
    .section-title {
        font-size: 1.1rem;
    }
    
    .research-entry,
    .academic-item {
        padding-bottom: 1rem;
        margin-bottom: 1rem;
    }
    
    .hero-links {
        gap: 0.4rem;
    }
    
    .btn {
        padding: 0.45rem 0.85rem;
        font-size: 0.75rem;
    }
}

/* Print Styles */
@media print {
    .navbar, .nav-toggle { display: none; }
    .hero { padding-top: 2rem; }
    .section { padding: 2rem 0; }
    .page-main { padding-top: 0; }
}