/* ==========================================================================
   Global Header & Navigation Styles
   Shared across all pages (browse, search, details)
   ========================================================================== */

/* Reset */
* {
    list-style: none;
    text-decoration: none;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* --------------------------------------------------------------------------
   Site Header
   -------------------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-dark, #1a2332);
    height: var(--header-height, 72px);
    display: flex;
    align-items: center;
    box-shadow: 0 4px 12px rgba(26, 35, 50, 0.1);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Logo */
.site-logo {
    font-family: var(--font-display, 'Cormorant Garamond', Georgia, serif);
    font-size: 1.75rem;
    font-weight: 600;
    color: #d4a574;
    letter-spacing: -0.02em;
    text-decoration: none;
    transition: color 0.15s ease;
}

.site-logo:hover {
    color: #e8c9a8;
}

/* Main Navigation */
.main-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.main-nav__link {
    position: relative;
    padding: 0.5rem 1rem;
    font-family: var(--font-body, 'Source Sans 3', sans-serif);
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.75);
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.15s ease;
}

.main-nav__link:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

.main-nav__link--active {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.1);
}

/* Dropdown Menu */
.main-nav__item {
    position: relative;
}

.main-nav__dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 180px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 8px 30px rgba(26, 35, 50, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s ease;
    z-index: 100;
    padding: 0.5rem 0;
    margin-top: 0.5rem;
}

.main-nav__item:hover .main-nav__dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-nav__dropdown-link {
    display: block;
    padding: 0.75rem 1.25rem;
    font-size: 0.9rem;
    color: #5a6473;
    transition: all 0.15s ease;
}

.main-nav__dropdown-link:hover {
    color: #e8927c;
    background: #faf8f5;
}

/* Header Right Icons */
.header-icons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-icon-link {
    display: flex;
    align-items: center;
    opacity: 0.85;
    transition: opacity 0.15s ease;
}

.header-icon-link:hover {
    opacity: 1;
}

/* University Logo */
.university-logo {
    height: 32px;
}

/* GitHub Icon */
.github-icon {
    width: 26px;
    height: 26px;
    color: #ffffff;
}

/* --------------------------------------------------------------------------
   Legacy Header Support (for pages not yet updated)
   -------------------------------------------------------------------------- */
header nav {
    width: 100%;
    height: 72px;
    background: #1a2332;
    box-shadow: 0 4px 12px rgba(26, 35, 50, 0.1);
    flex-wrap: wrap;
    position: fixed;
    z-index: 999;
    top: 0;
}

header db_logo {
    width: 150px;
    float: left;
    line-height: 72px;
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 28px;
    font-weight: 600;
}

header db_logo a {
    color: #d4a574 !important;
}

header un_logo {
    display: grid;
    place-items: center;
    width: 200px;
    height: 72px;
    float: right;
    margin-right: 20px;
    text-align: center;
    justify-content: center;
}

header un_logo img {
    filter: brightness(0) invert(1);
    opacity: 0.85;
}

header li {
    width: 110px;
    float: left;
    line-height: 72px;
    font-family: 'Source Sans 3', -apple-system, sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
}

header lib {
    display: block;
    width: 180px;
    float: left;
    line-height: 48px;
    background-color: white;
    font-size: 0.9rem;
    box-shadow: 0 8px 30px rgba(26, 35, 50, 0.15);
    border-radius: 4px;
}

header a {
    color: rgba(255, 255, 255, 0.75);
    display: block;
    text-align: center;
    transition: all 0.15s ease;
}

header a:hover {
    color: #ffffff;
    background-color: rgba(255, 255, 255, 0.1);
}

header lib a {
    color: #5a6473;
    display: block;
    text-align: left;
    width: 100%;
    padding: 0 1rem;
}

header lib a:hover {
    color: #e8927c;
    background-color: #faf8f5;
}

/* Dropdown menu hidden */
header .top_list {
    display: none;
    position: absolute;
    z-index: 10;
    margin-top: 0;
    border-radius: 8px;
    overflow: hidden;
}

/* Dropdown menu visible on hover */
header li:hover .top_list {
    display: block;
}

/* --------------------------------------------------------------------------
   Main Content Area
   -------------------------------------------------------------------------- */
.main {
    margin-top: calc(72px + 2rem);
    padding: 0 2rem;
    max-width: 1400px;
    margin-left: auto;
    margin-right: auto;
}

/* Page Title */
.title-div {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 2rem;
    font-weight: 500;
    color: #1a2332;
    margin: 0;
}

/* Theme Button */
.theme-btn {
    cursor: pointer;
    padding: 0.875rem 1.5rem;
    color: #fff;
    border-radius: 6px;
    background: #e8927c;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border: none;
    transition: all 0.25s ease;
    box-shadow: 0 4px 12px rgba(232, 146, 124, 0.3);
}

.theme-btn:hover {
    background: #d4755d;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 146, 124, 0.4);
}

/* --------------------------------------------------------------------------
   Data Table Styles
   -------------------------------------------------------------------------- */
.table-style-1 {
    width: 100%;
    border-collapse: collapse;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.9rem;
    background: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(26, 35, 50, 0.08);
}

.table-style-1 thead {
    background-color: #1a2332;
    color: #ffffff;
}

.table-style-1 th {
    padding: 1rem 1.25rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.table-style-1 td {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid #e5e0d8;
    vertical-align: middle;
    color: #5a6473;
}

.table-style-1 tbody tr {
    transition: background-color 0.15s ease;
}

.table-style-1 tbody tr:hover {
    background-color: #faf8f5;
}

.table-style-1 tbody tr:last-child td {
    border-bottom: none;
}

.table-style-1 td a {
    color: #e8927c;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.15s ease;
}

.table-style-1 td a:hover {
    color: #d4755d;
    text-decoration: underline;
}

/* Selected row state */
.table-style-1 .selected-row {
    background-color: rgba(232, 146, 124, 0.08) !important;
    border-left: 3px solid #e8927c;
}

/* Checkbox styling */
.table-style-1 input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: #e8927c;
    cursor: pointer;
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-top: 2rem;
    padding: 1rem 0;
}

.pagination a,
.pagination span,
.pagination button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 1rem;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: #5a6473;
    background: #ffffff;
    border: 1px solid #e5e0d8;
    border-radius: 6px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.15s ease;
}

.pagination a:hover,
.pagination button:hover:not(:disabled) {
    color: #e8927c;
    border-color: #e8927c;
}

.pagination span.disabled,
.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination button.active {
    background: #e8927c;
    color: #ffffff;
    border-color: #e8927c;
}

.pagination input[type="number"] {
    width: 60px;
    height: 40px;
    text-align: center;
    font-family: 'Source Sans 3', sans-serif;
    font-size: 0.9rem;
    border: 1px solid #e5e0d8;
    border-radius: 6px;
    outline: none;
    transition: border-color 0.15s ease;
}

.pagination input[type="number"]:focus {
    border-color: #e8927c;
    box-shadow: 0 0 0 3px rgba(232, 146, 124, 0.15);
}

.pagination form {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

/* --------------------------------------------------------------------------
   Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    header li {
        width: 100px;
    }
}

@media (max-width: 768px) {
    header li {
        display: none;
    }

    .main-nav {
        display: none;
    }

    .main {
        padding: 0 1rem;
    }

    .title-div {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
}

@media (max-width: 387px) {
    header un_logo {
        display: none;
    }

    .university-logo {
        display: none;
    }
}