/* ===================================
   Academic Minimal Design
   Inspired by al-folio theme
   =================================== */

:root {
    --primary-color: #0066cc;
    --text-color: #111;
    --text-light: #666;
    --bg-color: #ffffff;
    --border-color: #e0e0e0;
    --hover-bg: #f5f5f5;
    --link-color: #0066cc;
    --font-serif: 'Crimson Text', 'Georgia', serif;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --max-width: 800px;
    --transition: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--text-color);
    background: var(--bg-color);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
}

/* ===================================
   Navigation - Minimal Style
   =================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    backdrop-filter: blur(10px);
}

.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: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
    text-decoration: none;
    transition: var(--transition);
}

.nav-logo:hover {
    color: var(--link-color);
}

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

.nav-link {
    font-size: 0.95rem;
    color: var(--text-light);
    text-decoration: none;
    font-weight: 400;
    transition: var(--transition);
    text-transform: lowercase;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-color);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text-color);
    transition: var(--transition);
}

/* ===================================
   Main Content
   =================================== */
.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 6rem 2rem 4rem;
}

.container-narrow {
    max-width: 100%;
}

/* ===================================
   Profile Section
   =================================== */
.profile {
    margin-bottom: 3rem;
}

.profile-grid {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 2.5rem;
    align-items: start;
}

.profile-image-wrapper {
    position: relative;
}

.profile-image {
    width: 180px;
    height: 180px;
    position: relative;
}

.profile-image img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--border-color);
}

.image-placeholder {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: var(--hover-bg);
    border: 1px solid var(--border-color);
    display: none;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    font-size: 3rem;
    position: absolute;
    top: 0;
    left: 0;
}

.profile-info {
    padding-top: 0.5rem;
}

.profile-name {
    font-family: var(--font-serif);
    font-size: 2.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

.profile-title {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.profile-affiliation {
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.profile-affiliation a {
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.profile-affiliation a:hover {
    color: var(--link-color);
    border-bottom-color: var(--link-color);
}

.profile-links {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.profile-links a {
    color: var(--text-light);
    font-size: 1.25rem;
    transition: var(--transition);
    text-decoration: none;
}

.profile-links a:hover {
    color: var(--link-color);
    transform: translateY(-2px);
}

/* ===================================
   About Section
   =================================== */
.about-section {
    margin-bottom: 3rem;
}

.about-text {
    font-size: 1.05rem;
    line-height: 1.7;
    color: var(--text-color);
    margin-bottom: 1.25rem;
    text-align: justify;
}

.about-text a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.about-text a:hover {
    border-bottom-color: var(--link-color);
}

.about-text strong {
    font-weight: 500;
    color: var(--text-color);
}

/* ===================================
   Section Styles
   =================================== */
.section {
    margin-bottom: 3rem;
    padding-top: 2rem;
}

.section-heading {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    text-transform: lowercase;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* ===================================
   Research Interests
   =================================== */
.interests-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.interest-tag {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--hover-bg);
    color: var(--text-color);
    border-radius: 4px;
    font-size: 0.9rem;
    font-weight: 400;
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.interest-tag:hover {
    background: var(--bg-color);
    border-color: var(--link-color);
    color: var(--link-color);
}

/* ===================================
   Publications - Minimal Style
   =================================== */
.publications-list-minimal {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.pub-item {
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

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

.pub-title {
    font-size: 1.05rem;
    font-weight: 500;
    color: var(--text-color);
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.pub-authors {
    font-size: 0.95rem;
    color: var(--text-light);
    margin-bottom: 0.25rem;
}

.pub-authors strong {
    color: var(--text-color);
    font-weight: 500;
}

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

.pub-links {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.pub-links a {
    font-size: 0.85rem;
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.pub-links a:hover {
    border-bottom-color: var(--link-color);
}

.view-all-link {
    margin-top: 2rem;
    text-align: right;
}

.view-all-link a {
    font-size: 0.95rem;
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
    font-weight: 500;
}

.view-all-link a:hover {
    border-bottom-color: var(--link-color);
}

/* ===================================
   Publications Page - Full List
   =================================== */
.page-header {
    margin-bottom: 3rem;
}

.page-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1rem;
    text-transform: lowercase;
}

.publications-note {
    font-size: 0.95rem;
    color: var(--text-light);
    padding: 1rem;
    background: var(--hover-bg);
    border-left: 3px solid var(--link-color);
    border-radius: 4px;
}

.publications-note a {
    color: var(--link-color);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.publications-note a:hover {
    border-bottom-color: var(--link-color);
}

.loading-state {
    text-align: center;
    padding: 3rem 0;
    color: var(--text-light);
}

.spinner-minimal {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--link-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.error-state {
    padding: 1rem;
    background: #fff9e6;
    border: 1px solid #ffd966;
    border-radius: 4px;
    color: #856404;
    margin-bottom: 2rem;
}

.error-state i {
    margin-right: 0.5rem;
}

.publications-full-list {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.pub-year-group {
    margin-bottom: 1.5rem;
}

.year-heading {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--border-color);
}

.pub-item-full {
    padding: 1.25rem 0;
    border-bottom: 1px solid var(--border-color);
}

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

.pub-item-full .pub-title {
    font-size: 1.05rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
}

.pub-meta {
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.pub-type {
    display: inline-block;
    padding: 0.2rem 0.6rem;
    background: var(--hover-bg);
    color: var(--text-light);
    border-radius: 3px;
    font-size: 0.8rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pub-citations {
    font-size: 0.85rem;
    color: var(--text-light);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* ===================================
   Footer
   =================================== */
.footer {
    margin-top: 4rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

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

/* ===================================
   Responsive Design
   =================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 65px;
        left: -100%;
        width: 100%;
        background: var(--bg-color);
        flex-direction: column;
        padding: 2rem;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
        transition: left 0.3s ease;
        gap: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .profile-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        text-align: center;
    }

    .profile-image {
        margin: 0 auto;
    }

    .profile-links {
        justify-content: center;
    }

    .main-content {
        padding: 5rem 1.5rem 3rem;
    }

    .profile-name {
        font-size: 1.85rem;
    }

    .about-text {
        text-align: left;
        font-size: 1rem;
    }

    .interests-list {
        justify-content: center;
    }

    .view-all-link {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 1rem 1.5rem;
    }

    .profile-image {
        width: 150px;
        height: 150px;
    }

    .profile-name {
        font-size: 1.65rem;
    }

    .section-heading,
    .page-title {
        font-size: 1.35rem;
    }
}

/* ===================================
   Utility Classes
   =================================== */
.text-center {
    text-align: center;
}

.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }

/* Print Styles */
@media print {
    .navbar,
    .footer {
        display: none;
    }

    .main-content {
        padding-top: 2rem;
    }

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