/* ============================================================
   Typography & Base
   ============================================================ */

body {
    font-family: 'Georgia', 'Microsoft YaHei', serif;
}

h1, h2, h3, .section-title {
    color: #224b8d;
    border-bottom: 1px solid #aaaaaa;
    padding-bottom: 0.2em;
    margin-top: 0.7em;
    margin-bottom: 0.3em;
}

h1 { font-size: 165%; }
h2 { font-size: 125%; padding-top: 0.5em; }
h3 { font-size: 110%; border-bottom: none; }

a {
    color: #224b8d;
    text-decoration: none;
}
a:hover {
    border-bottom: 1px gray dotted;
}

.badge {
    font-size: 0.85em;
    padding: 0.3em 0.6em;
}

.btn {
    padding: 0.3em 0.6em;
    font-size: 0.9em;
}

p {
    margin-bottom: 0.5rem;
}

li {
    margin-bottom: 0.3rem;
}

.badge-group {
    display: flex;
    gap: 0.3rem;
    margin: 0.3rem 0;
}

h1 {
    margin-bottom: 0.5rem;
}

/* ============================================================
   Section titles
   ============================================================ */

.section-title {
    border-bottom: 2px solid #eee;
    padding-bottom: 0.3rem;
    margin: 1rem 0 0.5rem;
    font-size: 1.2em;
}

/* ============================================================
   Publication list (numbered)
   ============================================================ */

.publication-list {
    counter-reset: publication-counter;
    list-style: none;
    padding-left: 0;
}

.publication-item {
    counter-increment: publication-counter;
    position: relative;
    padding-left: 2.5rem;
    margin: 1rem 0;
}

.publication-item::before {
    content: "[" counter(publication-counter) "]";
    position: absolute;
    left: 0;
    font-weight: bold;
    color: #2c3e50;
    font-size: 0.9em;
}

/* ============================================================
   Layout: sidebar + main content
   ============================================================ */

.layout-wrapper {
    display: flex;
    min-height: 100vh;
}

/* ============================================================
   Sidebar
   ============================================================ */

.sidebar {
    width: 260px;
    min-width: 260px;
    height: 100vh;
    position: sticky;
    top: 0;
    background-color: #f8f9fa;
    border-right: 1px solid #e0e0e0;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: 0;
}

.sidebar-inner {
    padding: 2rem 1.2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

/* Avatar */
.sidebar-avatar-wrapper {
    margin-bottom: 0.8rem;
}

.sidebar-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #224b8d;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

/* Name */
.sidebar-name {
    font-size: 1.2em;
    font-weight: 700;
    color: #224b8d;
    line-height: 1.3;
}

.sidebar-name-zh {
    font-size: 0.95em;
    color: #666;
    margin-top: 0.15rem;
}

/* Divider */
.sidebar-divider {
    width: 60%;
    margin: 1rem auto;
    border: none;
    border-top: 1px solid #ddd;
    opacity: 1;
}

/* Navigation links */
.sidebar-nav {
    display: flex;
    flex-direction: column;
    width: 100%;
    gap: 0.25rem;
}

.sidebar-nav-link {
    display: block;
    padding: 0.55rem 1rem;
    border-radius: 6px;
    color: #444;
    text-decoration: none;
    font-size: 1em;
    transition: background-color 0.15s ease, color 0.15s ease;
    text-align: left;
}

.sidebar-nav-link i {
    width: 1.5em;
    text-align: center;
    margin-right: 0.4em;
    color: #888;
}

.sidebar-nav-link:hover {
    background-color: #e9ecef;
    color: #224b8d;
    border-bottom: none;
}

.sidebar-nav-link.active {
    background-color: #e0e7f1;
    color: #224b8d;
    font-weight: 600;
    border-left: 3px solid #224b8d;
}

.sidebar-nav-link.active i {
    color: #224b8d;
}

/* Social icons */
.sidebar-social {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.sidebar-social-link {
    color: #888;
    font-size: 1.25em;
    transition: color 0.15s ease;
}

.sidebar-social-link:hover {
    color: #224b8d;
    border-bottom: none;
}

/* ============================================================
   Main content area
   ============================================================ */

.main-content {
    flex: 1;
    padding: 2rem 2.5rem;
    max-width: 900px;
    width: 100%;
}

/* ============================================================
   Mobile top bar (hidden on desktop, shown on mobile)
   ============================================================ */

.mobile-topbar {
    background-color: #f8f9fa;
    border-bottom: 1px solid #e0e0e0;
}

.mobile-topbar .navbar-brand {
    font-size: 1em;
    font-weight: 600;
    color: #224b8d;
}

/* ============================================================
   Responsive: mobile (<768px)
   ============================================================ */

@media (max-width: 767px) {
    .layout-wrapper {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        min-width: 100%;
        height: auto;
        position: static;
        border-right: none;
        border-bottom: 1px solid #e0e0e0;
    }

    .sidebar.collapse:not(.show) {
        display: none;
    }

    .sidebar-inner {
        padding: 1rem 1rem;
    }

    .sidebar-avatar {
        width: 80px;
        height: 80px;
    }

    .sidebar-divider {
        margin: 0.5rem auto;
    }

    .main-content {
        padding: 1rem 1rem;
        max-width: 100%;
    }
}