/* ============================================
   Academic Personal Website Stylesheet
   Clean, Professional, Information-First
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: #2c2c2c;
    background-color: #fafafa;
}

a {
    color: #1a5276;
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #2980b9;
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

/* --- Layout Container --- */
.container {
    width: 92%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- Top Header Bar --- */
.site-header {
    background-color: #1a3a5c;
    color: #fff;
    padding: 1.8rem 0 0 0;
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.site-header .header-identity {
    display: flex;
    align-items: center;
    gap: 1.2rem;
}

.site-header .header-photo {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255,255,255,0.3);
}

.site-header .header-text h1 {
    font-size: 1.6rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin: 0;
}

.site-header .header-text p {
    font-size: 0.92rem;
    opacity: 0.85;
    margin-top: 0.15rem;
}

/* --- Navigation --- */
.main-nav {
    background-color: #15334d;
}

.main-nav ul {
    display: flex;
    list-style: none;
    flex-wrap: wrap;
}

.main-nav ul li a {
    display: block;
    padding: 0.7rem 1.3rem;
    color: rgba(255,255,255,0.8);
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-decoration: none;
    transition: background 0.2s, color 0.2s;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
    background-color: rgba(255,255,255,0.1);
    color: #fff;
    text-decoration: none;
}

/* --- Page Title --- */
.page-title {
    padding: 2rem 0 0.5rem;
    border-bottom: 2px solid #1a3a5c;
    margin-bottom: 2rem;
}

.page-title h2 {
    font-size: 1.5rem;
    color: #1a3a5c;
    font-weight: 600;
}

/* --- Main Content Area --- */
.content-area {
    padding: 2rem 0 3rem;
    min-height: 60vh;
}

/* --- Section Block --- */
.section-block {
    margin-bottom: 2.5rem;
}

.section-block h3 {
    font-size: 1.15rem;
    color: #1a3a5c;
    border-left: 4px solid #2980b9;
    padding-left: 0.75rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.section-block p {
    margin-bottom: 0.8rem;
}

/* --- Profile Section (Home page) --- */
.profile-row {
    display: flex;
    gap: 2rem;
    align-items: flex-start;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.profile-photo {
    flex: 0 0 180px;
    text-align: center;
}

.profile-photo img {
    width: 180px;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.profile-details {
    flex: 1;
    min-width: 260px;
}

.profile-details .name {
    font-size: 1.6rem;
    font-weight: 700;
    color: #1a3a5c;
    margin-bottom: 0.2rem;
}

.profile-details .affiliation {
    font-size: 1rem;
    color: #555;
    margin-bottom: 0.3rem;
}

.profile-details .email {
    font-size: 0.92rem;
    color: #555;
    margin-bottom: 1rem;
}

.profile-details .email a {
    color: #1a5276;
}

/* --- Research Interest Tags --- */
.research-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.research-tags li {
    background: #eaf2f8;
    color: #1a5276;
    padding: 0.3rem 0.75rem;
    border-radius: 3px;
    font-size: 0.88rem;
    font-weight: 500;
}

/* --- Stats Row --- */
.stats-row {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin: 1.5rem 0 2rem;
    padding: 1.2rem 0;
    border-top: 1px solid #e0e0e0;
    border-bottom: 1px solid #e0e0e0;
}

.stat-item {
    text-align: center;
    flex: 1;
    min-width: 100px;
}

.stat-item .number {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    color: #1a3a5c;
    line-height: 1.2;
}

.stat-item .label {
    display: block;
    font-size: 0.82rem;
    color: #777;
    margin-top: 0.2rem;
}

/* --- Simple List --- */
.simple-list {
    list-style: none;
    padding: 0;
}

.simple-list li {
    padding: 0.4rem 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 0.95rem;
}

.simple-list li:last-child {
    border-bottom: none;
}

.simple-list li .meta {
    color: #888;
    font-size: 0.85rem;
}

/* --- Project Cards --- */
.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.project-card {
    border: 1px solid #e4e4e4;
    border-radius: 6px;
    overflow: hidden;
    background: #fff;
    transition: box-shadow 0.25s, transform 0.25s;
}

.project-card:hover {
    box-shadow: 0 4px 16px rgba(0,0,0,0.08);
    transform: translateY(-2px);
}

.project-card .card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: #eee;
    display: block;
}

.project-card .card-body {
    padding: 1rem 1.2rem 1.2rem;
}

.project-card .card-body h4 {
    font-size: 1rem;
    color: #1a3a5c;
    margin-bottom: 0.5rem;
    font-weight: 600;
    line-height: 1.4;
}

.project-card .card-body p {
    font-size: 0.88rem;
    color: #555;
    line-height: 1.5;
    margin-bottom: 0.7rem;
}

.project-card .card-link {
    font-size: 0.88rem;
    font-weight: 500;
    color: #2980b9;
}

/* --- Publications --- */
.pub-year-heading {
    font-size: 1.1rem;
    font-weight: 700;
    color: #1a3a5c;
    margin: 2rem 0 0.8rem;
    padding-bottom: 0.3rem;
    border-bottom: 2px solid #e4e4e4;
}

.pub-year-heading:first-child {
    margin-top: 0;
}

.pub-item {
    margin-bottom: 0.9rem;
    padding-left: 1.2rem;
    position: relative;
    line-height: 1.6;
    font-size: 0.93rem;
}

.pub-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #2980b9;
}

.pub-item .pub-authors {
    color: #333;
}

.pub-item .pub-title {
    font-weight: 600;
    color: #222;
}

.pub-item .pub-venue {
    color: #1a5276;
    font-style: italic;
}

.pub-item .pub-year {
    color: #999;
    font-size: 0.85rem;
}

/* --- Photo Gallery --- */
.gallery-group {
    margin-bottom: 2rem;
}

.gallery-group h4 {
    font-size: 1.05rem;
    color: #1a3a5c;
    margin-bottom: 0.8rem;
    font-weight: 600;
    border-left: 4px solid #2980b9;
    padding-left: 0.75rem;
}

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

.gallery-grid img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 4px;
    cursor: pointer;
    transition: transform 0.3s, box-shadow 0.3s;
}

.gallery-grid img:hover {
    transform: scale(1.02);
    box-shadow: 0 4px 12px rgba(0,0,0,0.12);
}

/* --- Patents --- */
.patent-item {
    padding: 1.2rem;
    margin-bottom: 1rem;
    background: #fff;
    border: 1px solid #e4e4e4;
    border-radius: 6px;
}

.patent-item h4 {
    font-size: 1rem;
    color: #1a3a5c;
    margin-bottom: 0.4rem;
}

.patent-item .patent-meta {
    font-size: 0.88rem;
    color: #777;
}

/* --- Footer --- */
.site-footer {
    background: #1a3a5c;
    color: rgba(255,255,255,0.7);
    padding: 1.5rem 0;
    text-align: center;
    font-size: 0.85rem;
    margin-top: 2rem;
}

.site-footer a {
    color: rgba(255,255,255,0.85);
}

.site-footer a:hover {
    color: #fff;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        text-align: center;
    }

    .site-header .header-identity {
        flex-direction: column;
        text-align: center;
    }

    .main-nav ul {
        justify-content: center;
    }

    .profile-row {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .research-tags {
        justify-content: center;
    }

    .stats-row {
        justify-content: center;
    }

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

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

@media (max-width: 480px) {
    .site-header .header-text h1 {
        font-size: 1.3rem;
    }

    .main-nav ul li a {
        padding: 0.5rem 0.8rem;
        font-size: 0.85rem;
    }

    .profile-photo img {
        width: 140px;
    }
}

/* ============================================
   Legacy content styles (index / publications / patents)
   Restyled to match the card-based theme above.
   ============================================ */

/* Generic content section */
.content-area section {
    margin-bottom: 2.2rem;
}

.content-area section > h2 {
    font-size: 1.25rem;
    color: #1a3a5c;
    font-weight: 600;
    border-left: 4px solid #2980b9;
    padding-left: 0.75rem;
    margin-bottom: 0.9rem;
}

.content-area section p {
    margin-bottom: 0.8rem;
}

.content-area section ul,
.content-area section ol {
    padding-left: 1.4rem;
    margin-bottom: 0.5rem;
}

.content-area section li {
    margin-bottom: 0.4rem;
}

/* Home profile block */
.profile {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    padding-bottom: 1.8rem;
    border-bottom: 1px solid #e0e0e0;
}

.profile .portrait {
    flex: 0 0 180px;
    width: 180px;
    height: auto;
    border-radius: 6px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border: none;
}

.profile > div {
    flex: 1;
    min-width: 280px;
}

.profile h1 {
    font-size: 1.7rem;
    color: #1a3a5c;
    font-weight: 700;
    margin-bottom: 0.3rem;
}

.profile .subtitle {
    color: #555;
    font-size: 1rem;
    margin-bottom: 0.7rem;
}

.profile p {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
}

/* Publications */
.publication-years {
    margin-top: 0;
}

.publication-year {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 1.5rem;
    padding: 1.4rem 0;
    border-bottom: 1px solid #eee;
}

.publication-year h2 {
    position: sticky;
    top: 16px;
    align-self: start;
    margin: 0;
    padding: 0;
    border: none;
    color: #2980b9;
    font-size: 1.15rem;
    font-weight: 700;
}

.publication-list {
    margin: 0;
    padding-left: 1.2rem;
}

.publication-list li {
    margin-bottom: 0.6rem;
    font-size: 0.93rem;
    line-height: 1.6;
}

/* Projects / Patents legacy rows */
.project {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
    align-items: center;
    padding: 1.2rem;
    margin-bottom: 1.2rem;
    background: #fff;
    border: 1px solid #e4e4e4;
    border-radius: 6px;
}

.project img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid #e0e0e0;
}

.project h2 {
    margin: 0 0 0.4rem;
    font-size: 1.1rem;
    color: #1a3a5c;
    border: none;
    padding: 0;
}

.project p {
    margin-bottom: 0.3rem;
    font-size: 0.92rem;
}

/* Reviewer service list */
.service-list {
    columns: 2;
    list-style-position: outside;
    padding-left: 1.4rem;
}

.service-list li {
    margin-bottom: 0.35rem;
    break-inside: avoid;
}

@media (max-width: 768px) {
    .profile {
        flex-direction: column;
        text-align: center;
    }

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

    .publication-year {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }

    .publication-year h2 {
        position: static;
    }

    .service-list {
        columns: 1;
    }
}