/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: #ffffff;
    color: #1f2937;
    line-height: 1.7;
    min-height: 100vh;
}

a {
    color: #c2410c;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #9a3412;
    text-decoration: underline;
}

/* Navigation */
.navbar {
    background-color: #000000;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    border-bottom: 1px solid #1f1f1f;
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: #f97316;
}

.nav-brand a:hover {
    text-decoration: none;
    color: #fb923c;
}

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

.nav-links a {
    color: #e5e7eb;
    font-weight: 400;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
}

.nav-links a:hover,
.nav-links a.active {
    color: #f97316;
    text-decoration: none;
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: #e5e7eb;
    transition: 0.3s;
}

/* Main Content */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Hero Section */
.hero-section {
    margin-bottom: 4rem;
}

.profile-container {
    display: flex;
    gap: 3rem;
    align-items: flex-start;
}

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

.profile-image img {
    width: 280px;
    height: 330px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12);
    border: 1px solid #e5e7eb;
}

.profile-info h1 {
    font-size: 2.5rem;
    color: #0f172a;
    margin-bottom: 1.5rem;
    font-weight: 500;
}

.profile-info p {
    margin-bottom: 1rem;
    text-align: justify;
    color: #1f2937;
}

.profile-info .intro {
    font-size: 1.05rem;
}

/* News Section */
.news-section {
    margin-top: 3rem;
}

.news-section h2 {
    font-size: 2rem;
    color: #0f172a;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.news-list {
    list-style: none;
}

.news-list li {
    position: relative;
    padding: 0.9rem 0 0.9rem 1.6rem;
    border-bottom: 1px solid #e5e7eb;
    line-height: 1.7;
    color: #1f2937;
}

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

/* Visitor Map Section */
.visitor-section {
    margin-top: 3rem;
}

.visitor-section h2 {
    font-size: 2rem;
    color: #0f172a;
    margin-bottom: 0.5rem;
    font-weight: 400;
}

.visitor-subtitle {
    color: #4b5563;
    margin-bottom: 1.25rem;
    font-size: 0.95rem;
}

.visitor-map {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 0;
}

.visitor-map-inner {
    width: 320px;
    max-width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
}

.visitor-map-inner > * {
    width: 100% !important;
    max-width: 100% !important;
}

.visitor-map-inner iframe,
.visitor-map-inner canvas,
.visitor-map-inner img,
.visitor-map-inner svg {
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
    display: block;
}

.news-icon {
    position: absolute;
    left: 0;
    top: 1.1rem;
    color: #c2410c;
    font-size: 0.7rem;
    line-height: 1;
}

.news-list em {
    color: #6b7280;
    font-style: italic;
    font-size: 0.9rem;
    margin-left: 0.3rem;
    white-space: nowrap;
}

.news-list strong {
    color: #0f172a;
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2.2rem;
    color: #0f172a;
    font-weight: 500;
}

/* Experience Section */
.experience-item {
    background-color: #ffffff;
    padding: 1.5rem 2rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
}

.experience-item h3 {
    color: #c2410c;
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.experience-item .company {
    color: #0f172a;
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.experience-item .duration {
    color: #6b7280;
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.experience-item p {
    color: #1f2937;
}

/* Publications Section */
.publication-item {
    background-color: #ffffff;
    padding: 1.5rem 2rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
}

.pub-figure {
    flex: 0 0 220px;
    align-self: center;
    background: linear-gradient(135deg, #f9fafb, #f3f4f6);
    border: 1px solid #e5e7eb;
    border-radius: 8px;
    overflow: hidden;
    aspect-ratio: 11 / 8;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.25s ease, border-color 0.25s ease;
}

.pub-figure:hover {
    transform: translateY(-2px);
    border-color: #c2410c;
}

.pub-figure img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

.pub-body {
    flex: 1;
    min-width: 0;
}

.publication-item h3 {
    color: #0f172a;
    font-size: 1.1rem;
    margin-bottom: 0.8rem;
    line-height: 1.5;
}

.publication-item .authors {
    color: #374151;
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
}

.publication-item .venue {
    color: #c2410c;
    font-style: italic;
    margin-bottom: 0.8rem;
}

.publication-item .links a {
    margin-right: 1rem;
    font-size: 0.9rem;
}

/* Services Section */
.services-section h2 {
    font-size: 1.8rem;
    color: #0f172a;
    margin-top: 2rem;
    margin-bottom: 1rem;
    font-weight: 400;
}

.services-list {
    list-style: none;
}

.services-list li {
    padding: 0.6rem 0;
    display: flex;
    align-items: center;
    gap: 0.8rem;
}

.services-list li::before {
    content: "■";
    color: #c2410c;
    font-size: 0.6rem;
}

/* Contact Section */
.contact-section {
    max-width: 600px;
}

.contact-info {
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 2rem;
    border: 1px solid #e5e7eb;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.contact-info p {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    color: #1f2937;
}

.contact-info i {
    color: #c2410c;
    width: 25px;
}

.social-links {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
}

.social-links a {
    font-size: 1.8rem;
    color: #1f2937;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #c2410c;
}

/* Footer */
.footer {
    background-color: #f9fafb;
    text-align: center;
    padding: 1.5rem;
    margin-top: 3rem;
    color: #6b7280;
    border-top: 1px solid #e5e7eb;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: #000000;
        flex-direction: column;
        padding: 1rem;
        gap: 0;
        border-bottom: 1px solid #1f1f1f;
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
    }

    .nav-links.active {
        display: flex;
    }

    .nav-links li {
        padding: 0.5rem 0;
    }

    .nav-toggle {
        display: flex;
    }

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

    .profile-image img {
        width: 200px;
        height: 250px;
    }

    .profile-info h1 {
        font-size: 2rem;
    }

    .profile-info p {
        text-align: left;
    }

    .main-content {
        padding: 2rem 1rem;
    }
}

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

    .nav-brand a {
        font-size: 1.2rem;
    }

    .profile-info h1 {
        font-size: 1.6rem;
    }

    .news-section h2 {
        font-size: 1.5rem;
    }
}

/* ===== Additions for Prospective-PhD Layout ===== */

/* Section heading shared style */
.section-heading {
    color: #c2410c;
    font-size: 1.6rem;
    font-weight: 500;
    margin-top: 2.5rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.4rem;
    border-bottom: 1px solid rgba(194, 65, 12, 0.25);
}

/* Page subtitle under page header */
.page-subtitle {
    color: #6b7280;
    font-size: 1rem;
    margin-top: 0.5rem;
    max-width: 800px;
    line-height: 1.6;
}

/* Hero — tagline + pills */
.tagline {
    margin-bottom: 1.25rem !important;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-pill {
    display: inline-block;
    background: linear-gradient(90deg, #f97316, #ea580c);
    color: #ffffff;
    font-weight: 600;
    font-size: 0.85rem;
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
    letter-spacing: 0.3px;
}

.tag-pill.subtle {
    background: transparent;
    color: #c2410c;
    border: 1px solid rgba(194, 65, 12, 0.5);
}

/* Profile image quick links */
.profile-quick-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

.profile-quick-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background-color: #f3f4f6;
    color: #1f2937;
    font-size: 1rem;
    transition: all 0.25s ease;
    border: 1px solid #e5e7eb;
}

.profile-quick-links a:hover {
    background-color: #c2410c;
    color: #ffffff;
    border-color: #c2410c;
    transform: translateY(-2px);
    text-decoration: none;
}

/* Research interests grid */
.interests-section {
    margin-top: 3rem;
}

.interests-section h2 {
    font-size: 2rem;
    color: #0f172a;
    margin-bottom: 1.25rem;
    font-weight: 400;
}

.interests-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.interest-pill {
    background-color: #ffffff;
    color: #1f2937;
    border: 1px solid rgba(194, 65, 12, 0.35);
    padding: 0.5rem 1rem;
    border-radius: 999px;
    font-size: 0.92rem;
    transition: all 0.25s ease;
}

.interest-pill:hover {
    background-color: #c2410c;
    color: #ffffff;
    border-color: #c2410c;
}

/* Experience list bullets */
.exp-list {
    list-style: none;
    padding-left: 0;
    margin-top: 0.6rem;
}

.exp-list li {
    position: relative;
    padding-left: 1.2rem;
    margin-bottom: 0.55rem;
    line-height: 1.65;
    color: #1f2937;
}

.exp-list li::before {
    content: "\25B8"; /* ▸ */
    position: absolute;
    left: 0;
    top: 0;
    color: #c2410c;
    font-size: 0.9rem;
}

.exp-list code {
    background-color: rgba(194, 65, 12, 0.08);
    color: #9a3412;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.88em;
    font-family: "Courier New", Courier, monospace;
    border: 1px solid rgba(194, 65, 12, 0.18);
}

/* Skills card */
.skills-card {
    padding: 1.5rem 2rem;
}

.skill-row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 0.7rem 0;
    border-bottom: 1px dashed #e5e7eb;
}

.skill-row:last-child {
    border-bottom: none;
}

.skill-label {
    flex: 0 0 170px;
    color: #c2410c;
    font-weight: 500;
    font-size: 0.95rem;
}

.skill-pills {
    flex: 1;
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
}

.skill-pill {
    background-color: rgba(194, 65, 12, 0.08);
    color: #1f2937;
    border: 1px solid rgba(194, 65, 12, 0.22);
    padding: 0.25rem 0.7rem;
    border-radius: 6px;
    font-size: 0.85rem;
}

/* Publication stats bar */
.pub-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 2.5rem;
}

.stat-card {
    background-color: #ffffff;
    padding: 1.2rem 1rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #e5e7eb;
    border-top: 3px solid #c2410c;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.stat-num {
    font-size: 2rem;
    font-weight: 700;
    color: #c2410c;
    line-height: 1;
}

.stat-label {
    color: #6b7280;
    font-size: 0.85rem;
    margin-top: 0.3rem;
    letter-spacing: 0.3px;
}

/* Publication item — id and badges */
.publication-item {
    position: relative;
}

.pub-id {
    display: inline-block;
    background-color: rgba(194, 65, 12, 0.1);
    color: #c2410c;
    font-weight: 600;
    font-size: 0.8rem;
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
    margin-bottom: 0.5rem;
    letter-spacing: 0.5px;
    border: 1px solid rgba(194, 65, 12, 0.25);
}

.publication-item .venue {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    align-items: center;
}

.badge {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.18rem 0.55rem;
    border-radius: 4px;
    letter-spacing: 0.4px;
    font-style: normal;
    text-transform: uppercase;
}

.badge-q1 {
    background-color: #16a34a;
    color: #ffffff;
}

.badge-impact {
    background-color: #ecfdf5;
    color: #166534;
    border: 1px solid #86efac;
}

.badge-core {
    background-color: #2563eb;
    color: #ffffff;
}

.badge-accept {
    background-color: #eff6ff;
    color: #1e40af;
    border: 1px solid #93c5fd;
}

.badge-status {
    background-color: #d97706;
    color: #ffffff;
}

.badge-prep {
    background-color: #f5f3ff;
    color: #6b21a8;
    border: 1px solid #d8b4fe;
}

.pub-desc {
    color: #374151;
    font-size: 0.95rem;
    margin-top: 0.6rem;
    line-height: 1.6;
}

/* Service cards */
.service-card {
    background-color: #ffffff;
    padding: 1.4rem 1.8rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
    border-left: 3px solid #c2410c;
}

.service-card-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.3rem;
}

.service-card h3 {
    color: #0f172a;
    font-size: 1.15rem;
    margin: 0;
}

.service-date {
    color: #c2410c;
    font-size: 0.9rem;
    font-style: italic;
    white-space: nowrap;
}

.service-org {
    color: #6b7280;
    font-size: 0.95rem;
    margin-bottom: 0.7rem;
}

/* Override default services-list bullet rule for old code paths */
.services-section h2 {
    font-size: 1.6rem;
}

/* References */
.references-section {
    margin-top: 3rem;
}

.reference-card {
    background-color: #ffffff;
    padding: 1.4rem 1.8rem;
    border-radius: 8px;
    margin-bottom: 1.25rem;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    border: 1px solid #e5e7eb;
    border-left: 3px solid #c2410c;
}

.reference-card h3 {
    color: #c2410c;
    font-size: 1.2rem;
    margin-bottom: 0.3rem;
}

.ref-title {
    color: #0f172a;
    font-size: 0.98rem;
    margin-bottom: 0.4rem;
}

.ref-affiliation {
    color: #374151;
    font-size: 0.92rem;
    margin-bottom: 0.7rem;
    line-height: 1.55;
}

.ref-contact {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    color: #6b7280;
    font-size: 0.9rem;
}

.ref-contact i {
    color: #c2410c;
    margin-right: 0.4rem;
}

/* Responsive — additions */
@media (max-width: 768px) {
    .pub-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .skill-row {
        flex-direction: column;
        gap: 0.5rem;
    }

    .skill-label {
        flex: none;
    }

    .profile-quick-links {
        margin-top: 1.25rem;
    }

    .ref-contact {
        flex-direction: column;
        gap: 0.4rem;
    }

    .publication-item {
        flex-direction: column;
        gap: 1rem;
        padding: 1.25rem;
    }

    .pub-figure {
        flex: none;
        width: 100%;
        max-width: 320px;
        aspect-ratio: 16 / 10;
    }
}

@media (max-width: 480px) {
    .pub-stats {
        grid-template-columns: 1fr 1fr;
    }

    .stat-num {
        font-size: 1.6rem;
    }

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