/* ============================================
   Academic Personal Website — Ali Vergili
   Clean, minimal design inspired by al-folio
   ============================================ */

:root {
    --color-primary: #1a1a2e;
    --color-accent: #16537e;
    --color-accent-light: #e8f0f7;
    --color-text: #2c2c2c;
    --color-text-light: #555;
    --color-border: #ddd;
    --color-bg: #ffffff;
    --color-bg-alt: #fafafa;
    --font-sans: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
    --max-width: 860px;
}

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

html {
    scroll-behavior: smooth;
}

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

/* Navigation */
nav {
    background: var(--color-primary);
    padding: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 56px;
}

.nav-name {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    letter-spacing: 0.02em;
}

.nav-links {
    display: flex;
    gap: 0.25rem;
}

.nav-links a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 400;
    padding: 0.4rem 1rem;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.nav-links a:hover {
    color: #fff;
    background: rgba(255,255,255,0.1);
}

.nav-links a.active {
    color: #fff;
    background: rgba(255,255,255,0.15);
    font-weight: 600;
}

/* Main content */
main {
    flex: 1;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 3rem 2rem;
    width: 100%;
}

/* Hero / Home Section */
.hero-content {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
}

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

.hero-photo img {
    width: 240px;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.hero-text h1 {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.15rem;
    line-height: 1.2;
}

.hero-text .title {
    font-size: 1.15rem;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 0.1rem;
}

.hero-text .affiliation {
    font-size: 1.05rem;
    color: var(--color-text-light);
    margin-bottom: 1.25rem;
}

.hero-description {
    margin-bottom: 1.5rem;
}

.hero-description p {
    font-size: 1rem;
    line-height: 1.75;
    color: var(--color-text);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.contact-links a {
    color: var(--color-accent);
    text-decoration: none;
    font-size: 0.95rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s;
}

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

.contact-links a i {
    width: 18px;
    text-align: center;
}

/* Research Section */
.research h1 {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 2rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
}

.research h2 {
    font-family: var(--font-serif);
    font-size: 1.35rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.3rem;
    border-bottom: 1px solid var(--color-border);
}

.research h2:first-of-type {
    margin-top: 0;
}

/* Paper Cards */
.paper {
    margin-bottom: 2rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg);
    border-left: 3px solid var(--color-accent);
    border-radius: 0 6px 6px 0;
    box-shadow: 0 1px 4px rgba(0,0,0,0.04);
    transition: box-shadow 0.2s;
}

.paper:hover {
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
}

.paper h3 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.3rem;
    line-height: 1.4;
}

.paper .authors {
    font-size: 0.95rem;
    color: var(--color-text-light);
    margin-bottom: 0.3rem;
    font-style: italic;
}

.paper .authors a {
    color: var(--color-accent);
    text-decoration: none;
    font-style: italic;
}

.paper .authors a:hover {
    text-decoration: underline;
}

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

.paper .award {
    font-size: 0.9rem;
    color: #b8860b;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.paper .award i {
    margin-right: 0.25rem;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    margin-right: 0.4rem;
    font-style: normal;
}

.badge.accepted {
    background: #e6f4ea;
    color: #1e7e34;
}

.badge.revise {
    background: #fff3cd;
    color: #856404;
}

.badge.review {
    background: #e8f0f7;
    color: var(--color-accent);
}

/* Paper Links */
.paper-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 0.4rem;
}

.paper-link {
    font-size: 0.9rem;
    color: var(--color-accent);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s;
}

.paper-link:hover {
    color: var(--color-primary);
}

.abstract-toggle {
    background: none;
    border: 1px solid var(--color-border);
    color: var(--color-text-light);
    font-size: 0.85rem;
    cursor: pointer;
    padding: 0.2rem 0.7rem;
    border-radius: 3px;
    font-family: var(--font-sans);
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.abstract-toggle:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.abstract-toggle i {
    font-size: 0.7rem;
    transition: transform 0.2s;
}

/* Abstract */
.abstract {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0;
}

.abstract.show {
    max-height: 600px;
    padding-top: 0.75rem;
}

.abstract p {
    font-size: 0.92rem;
    line-height: 1.7;
    color: var(--color-text-light);
    padding: 0.75rem 1rem;
    background: var(--color-bg-alt);
    border-radius: 4px;
    border-left: 2px solid var(--color-border);
}

/* Footer */
footer {
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
    padding: 1.5rem 2rem;
    text-align: center;
}

footer p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

/* Responsive */
@media (max-width: 700px) {
    .hero-content {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 1.5rem;
    }

    .hero-photo img {
        width: 180px;
    }

    .hero-text h1 {
        font-size: 1.8rem;
    }

    .contact-links {
        align-items: center;
    }

    main {
        padding: 2rem 1.25rem;
    }

    .paper {
        padding: 1rem 1.15rem;
    }

    .nav-container {
        padding: 0 1rem;
    }
}