/* ===========================
   Global Styles
   =========================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Georgia, 'Times New Roman', serif;
    font-size: 17px;
    line-height: 1.7;
    color: #222;
    background: #fafafa;
}

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

a:hover {
    text-decoration: underline;
}

/* ===========================
   Construction Banner
   =========================== */
.construction-banner {
    background: #f39c12;
    color: #fff;
    text-align: center;
    padding: 0.6rem 1rem;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.95rem;
    font-weight: bold;
    letter-spacing: 0.05em;
}

/* ===========================
   Header & Navigation
   =========================== */
header {
    background: #1a3a5c;
    color: #fff;
    padding: 0 2rem;
}

header .header-inner {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.2rem 0;
    flex-wrap: wrap;
    gap: 0.75rem;
}

header .site-title {
    font-size: 1.4rem;
    font-weight: bold;
    color: #fff;
    letter-spacing: 0.02em;
}

header .site-title:hover {
    text-decoration: none;
    color: #aed6f1;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

nav a {
    color: #d6eaf8;
    font-size: 0.95rem;
    font-family: Arial, Helvetica, sans-serif;
    letter-spacing: 0.03em;
    transition: color 0.15s;
}

nav a:hover,
nav a.active {
    color: #fff;
    text-decoration: underline;
}

/* ===========================
   Main Content
   =========================== */
main {
    max-width: 900px;
    margin: 2.5rem auto 4rem;
    padding: 0 2rem;
}

/* ===========================
   Home Page
   =========================== */
.profile {
    display: flex;
    gap: 2.5rem;
    align-items: flex-start;
    flex-wrap: wrap;
    margin-bottom: 2.5rem;
}

.profile-photo {
    width: 180px;
    height: 220px;
    background: #d5dbdb;
    border-radius: 4px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #777;
    font-size: 0.85rem;
    font-family: Arial, sans-serif;
    text-align: center;
    border: 1px solid #bfc9ca;
}

.profile-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 4px;
}

.profile-bio h1 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
    color: #1a3a5c;
}

.profile-bio .position {
    font-size: 1.05rem;
    color: #555;
    font-style: italic;
    margin-bottom: 1rem;
}

.profile-bio p {
    margin-bottom: 0.9rem;
}

.contact-links {
    margin-top: 1rem;
    display: flex;
    gap: 1.2rem;
    flex-wrap: wrap;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 0.9rem;
}

.contact-links a {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: #1a5276;
    border: 1px solid #aed6f1;
    padding: 0.25rem 0.7rem;
    border-radius: 3px;
    transition: background 0.15s;
}

.contact-links a:hover {
    background: #eaf4fc;
    text-decoration: none;
}

/* ===========================
   Section Headings
   =========================== */
h2.section-title {
    font-size: 1.5rem;
    color: #1a3a5c;
    border-bottom: 2px solid #aed6f1;
    padding-bottom: 0.4rem;
    margin-bottom: 1.4rem;
}

/* ===========================
   Paper / Blog Lists
   =========================== */
.page-header {
    margin-bottom: 2rem;
}

.page-header h1 {
    font-size: 2rem;
    color: #1a3a5c;
    border-bottom: 2px solid #aed6f1;
    padding-bottom: 0.4rem;
}

.page-header p {
    margin-top: 0.6rem;
    color: #555;
    font-size: 0.97rem;
    font-family: Arial, Helvetica, sans-serif;
}

.paper-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.6rem;
}

.paper-item {
    border-left: 4px solid #aed6f1;
    padding: 0.8rem 0 0.8rem 1.2rem;
}

.paper-item .paper-title {
    font-size: 1.07rem;
    font-weight: bold;
    color: #1a3a5c;
    display: block;
    margin-bottom: 0.2rem;
}

.paper-item .paper-title a {
    color: inherit;
}

.paper-item .paper-title a:hover {
    color: #2e86c1;
}

.paper-item .paper-meta {
    font-size: 0.88rem;
    color: #666;
    font-family: Arial, Helvetica, sans-serif;
    margin-bottom: 0.5rem;
}

.paper-item .paper-abstract {
    font-size: 0.95rem;
    color: #444;
    margin-top: 0.4rem;
}

.paper-item .paper-links {
    margin-top: 0.6rem;
    display: flex;
    gap: 0.9rem;
    flex-wrap: wrap;
}

.paper-item .paper-links a {
    font-size: 0.85rem;
    font-family: Arial, Helvetica, sans-serif;
    color: #1a5276;
    background: #eaf4fc;
    border: 1px solid #aed6f1;
    padding: 0.15rem 0.6rem;
    border-radius: 3px;
}

.paper-item .paper-links a:hover {
    background: #d6eaf8;
    text-decoration: none;
}

/* Working paper status badge */
.badge {
    display: inline-block;
    font-size: 0.78rem;
    font-family: Arial, Helvetica, sans-serif;
    background: #fdebd0;
    color: #a04000;
    border: 1px solid #f0b27a;
    border-radius: 3px;
    padding: 0.1rem 0.5rem;
    margin-left: 0.5rem;
    vertical-align: middle;
}

/* ===========================
   Blog Posts
   =========================== */
.blog-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.blog-item {
    border-bottom: 1px solid #d5d8dc;
    padding-bottom: 1.8rem;
}

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

.blog-item .blog-date {
    font-size: 0.85rem;
    color: #888;
    font-family: Arial, Helvetica, sans-serif;
    margin-bottom: 0.25rem;
}

.blog-item .blog-title {
    font-size: 1.2rem;
    font-weight: bold;
    color: #1a3a5c;
    margin-bottom: 0.4rem;
}

.blog-item .blog-title a {
    color: inherit;
}

.blog-item .blog-title a:hover {
    color: #2e86c1;
}

.blog-item .blog-tags {
    margin-bottom: 0.5rem;
}

.blog-item .blog-tags span {
    display: inline-block;
    font-size: 0.78rem;
    font-family: Arial, Helvetica, sans-serif;
    background: #eaf4fc;
    color: #1a5276;
    border: 1px solid #aed6f1;
    border-radius: 3px;
    padding: 0.1rem 0.5rem;
    margin-right: 0.35rem;
}

.blog-item .blog-excerpt {
    font-size: 0.97rem;
    color: #444;
}

.blog-item .read-more {
    display: inline-block;
    margin-top: 0.6rem;
    font-size: 0.88rem;
    font-family: Arial, Helvetica, sans-serif;
    color: #1a5276;
}

/* ===========================
   Table
   =========================== */
table {
    border-collapse: collapse;
    margin-bottom: 2rem;
}

table th,
table td {
    border: 1px solid #aed6f1;
    padding: 0.5rem 1rem;
}

/* ===========================
   Recent section on Home
   =========================== */
.recent-section {
    margin-top: 2rem;
}

.recent-section ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.recent-section li {
    padding-left: 1rem;
    border-left: 3px solid #d6eaf8;
}

.recent-section li .item-title {
    font-weight: bold;
    color: #1a3a5c;
}

.recent-section li .item-meta {
    font-size: 0.85rem;
    color: #777;
    font-family: Arial, Helvetica, sans-serif;
}

.view-all-link {
    display: inline-block;
    margin-top: 0.8rem;
    font-size: 0.9rem;
    font-family: Arial, Helvetica, sans-serif;
}

/* ===========================
   Footer
   =========================== */
footer {
    text-align: center;
    padding: 1.4rem 2rem;
    font-size: 0.85rem;
    color: #888;
    font-family: Arial, Helvetica, sans-serif;
    border-top: 1px solid #e0e0e0;
    background: #f4f4f4;
}

/* ===========================
   Responsive
   =========================== */
@media (max-width: 600px) {
    .profile {
        flex-direction: column;
    }

    .profile-photo {
        width: 140px;
        height: 170px;
    }

    header .header-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    nav ul {
        gap: 1rem;
    }
}