:root {
    --app-bg: #f5f7fa;
    --app-surface: #ffffff;
    --app-surface-soft: #f8fafc;
    --app-border: #dce4ec;
    --app-border-strong: #c7d2dd;
    --app-text: #17212b;
    --app-muted: #667482;
    --app-primary: #176b87;
    --app-primary-strong: #0f5f73;
    --app-success: #16835a;
    --app-danger: #c2414b;
    --app-warning: #a16207;
    --app-shadow: 0 14px 36px rgba(20, 31, 43, .08);
    --app-shadow-sm: 0 6px 18px rgba(20, 31, 43, .06);
    --app-radius: 8px;
}

html {
    min-height: 100%;
    background: var(--app-bg);
}

body {
    min-height: 100vh;
    background: var(--app-bg);
    color: var(--app-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
    font-size: 14px;
    letter-spacing: 0;
}

a {
    color: var(--app-primary);
    text-decoration: none;
}

a:hover {
    color: var(--app-primary-strong);
}

hr {
    border-color: var(--app-border);
    opacity: 1;
}

body > p.ms-3.mt-4 {
    margin: 0 !important;
    padding: 16px 24px;
    background: rgba(255, 255, 255, .92);
    border-bottom: 1px solid var(--app-border);
    backdrop-filter: blur(12px);
}

body > p.ms-3.mt-4 + hr,
#top + hr {
    display: none;
}

header.py-4 {
    padding-top: 18px !important;
    padding-bottom: 18px !important;
    margin-bottom: 28px !important;
    background: rgba(255, 255, 255, .92);
    border-color: var(--app-border) !important;
    box-shadow: 0 1px 0 rgba(20, 31, 43, .02);
    backdrop-filter: blur(12px);
}

header .fs-4 {
    color: var(--app-text);
    font-size: 20px !important;
    font-weight: 750;
}

.container,
.container-fluid {
    --bs-gutter-x: 2rem;
}

h1,
.h1,
h2,
.h2,
h3,
.h3 {
    color: var(--app-text);
    font-weight: 760;
    letter-spacing: 0;
}

h1.fs-3,
.fs-3 {
    font-size: 24px !important;
    line-height: 1.3;
}

.text-muted,
.text-body-secondary {
    color: var(--app-muted) !important;
}

.btn {
    --bs-btn-border-radius: var(--app-radius);
    --bs-btn-font-size: 13px;
    --bs-btn-font-weight: 650;
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-width: 1px;
    box-shadow: none;
    transition: background-color .16s ease, border-color .16s ease, color .16s ease, box-shadow .16s ease, transform .16s ease;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--app-shadow-sm);
}

.btn:active {
    transform: translateY(0);
    box-shadow: none;
}

.btn-primary {
    --bs-btn-bg: var(--app-primary);
    --bs-btn-border-color: var(--app-primary);
    --bs-btn-hover-bg: var(--app-primary-strong);
    --bs-btn-hover-border-color: var(--app-primary-strong);
    --bs-btn-active-bg: var(--app-primary-strong);
    --bs-btn-active-border-color: var(--app-primary-strong);
}

.btn-outline-dark,
.btn-outline-primary,
.btn-outline-secondary,
.btn-outline-success,
.btn-outline-danger {
    background: var(--app-surface);
}

.btn-outline-dark {
    --bs-btn-color: #26323d;
    --bs-btn-border-color: var(--app-border-strong);
    --bs-btn-hover-color: #ffffff;
    --bs-btn-hover-bg: #26323d;
    --bs-btn-hover-border-color: #26323d;
}

.btn-outline-primary {
    --bs-btn-color: var(--app-primary);
    --bs-btn-border-color: #a8c6d0;
    --bs-btn-hover-bg: var(--app-primary);
    --bs-btn-hover-border-color: var(--app-primary);
}

.btn-outline-success {
    --bs-btn-color: var(--app-success);
    --bs-btn-border-color: #9bcdb9;
    --bs-btn-hover-bg: var(--app-success);
    --bs-btn-hover-border-color: var(--app-success);
}

.btn-outline-danger {
    --bs-btn-color: var(--app-danger);
    --bs-btn-border-color: #e0a6ac;
    --bs-btn-hover-bg: var(--app-danger);
    --bs-btn-hover-border-color: var(--app-danger);
}

.form-control,
.form-select {
    min-height: 38px;
    border-color: var(--app-border);
    border-radius: var(--app-radius);
    color: var(--app-text);
    font-size: 14px;
    background-color: var(--app-surface);
}

.form-control:focus,
.form-select:focus,
.form-check-input:focus {
    border-color: #82b7c7;
    box-shadow: 0 0 0 .2rem rgba(23, 107, 135, .14);
}

.form-label,
label {
    color: #344451;
    font-size: 13px;
    font-weight: 700;
}

.input-group .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.input-group .btn {
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.table-responsive {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow-sm);
}

.table {
    --bs-table-bg: var(--app-surface);
    --bs-table-color: var(--app-text);
    --bs-table-border-color: var(--app-border);
    margin-bottom: 0;
    vertical-align: middle;
}

.table > :not(caption) > * > * {
    padding: .75rem .85rem;
}

.table-sm > :not(caption) > * > * {
    padding: .58rem .72rem;
}

.table tr:first-child th,
.table thead th {
    background: #eef3f7 !important;
    color: #3b4a57;
    font-size: 12px;
    font-weight: 750;
    text-transform: uppercase;
    letter-spacing: .02em;
    border-bottom-color: var(--app-border-strong);
}

.table-dark,
.table-primary,
.table-success {
    --bs-table-bg: var(--app-surface);
    --bs-table-striped-bg: var(--app-surface-soft);
    --bs-table-hover-bg: #eef7f8;
    color: var(--app-text);
}

.table-hover tbody tr:hover > * {
    background-color: #eef7f8 !important;
}

.badge {
    border-radius: 999px;
    font-size: 12px;
    font-weight: 700;
    line-height: 1.1;
    padding: .38em .62em;
}

.bg-dark {
    background-color: #32414f !important;
}

.bg-primary {
    background-color: var(--app-primary) !important;
}

.bg-success {
    background-color: var(--app-success) !important;
}

.bg-danger {
    background-color: var(--app-danger) !important;
}

.bg-secondary {
    background-color: #667482 !important;
}

.alert {
    border-radius: var(--app-radius);
    border-color: var(--app-border);
    box-shadow: var(--app-shadow-sm);
}

.alert-primary {
    background: #edf7fa;
    color: #164f61;
}

.card,
.rounded-3 {
    border-radius: var(--app-radius) !important;
}

.card {
    overflow: hidden;
    border-color: var(--app-border);
    box-shadow: var(--app-shadow-sm);
}

.card-title {
    color: var(--app-text);
    font-size: 17px;
    font-weight: 750;
    line-height: 1.35;
}

.card-footer {
    border-top-color: var(--app-border);
    background: var(--app-surface-soft);
}

.list-group {
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow-sm);
}

.list-group-item {
    border-color: var(--app-border);
    color: var(--app-text);
    font-weight: 650;
}

.list-group-item:hover {
    background: #eef7f8;
    color: var(--app-primary-strong);
}

.pagination {
    gap: 6px;
    flex-wrap: wrap;
}

.page-link {
    min-width: 36px;
    border-radius: var(--app-radius) !important;
    border-color: var(--app-border);
    color: #42515e;
    font-size: 13px;
    font-weight: 650;
}

.page-link:hover {
    background: #eef7f8;
    border-color: #b7d4dc;
    color: var(--app-primary-strong);
}

.page-link.disabled {
    background: var(--app-primary);
    border-color: var(--app-primary);
    color: #ffffff;
}

.img-thumbnail {
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    background: var(--app-surface);
    box-shadow: 0 2px 8px rgba(20, 31, 43, .06);
}

.table .img-thumbnail {
    margin: 3px;
}

.masonry-container {
    column-gap: 14px !important;
}

.masonry-item {
    margin-bottom: 14px !important;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius) !important;
    box-shadow: var(--app-shadow-sm);
}

.masonry-item p {
    margin: 0;
    padding: 10px;
}

.masonry-item img {
    border: 0;
    border-radius: 0;
    box-shadow: none;
}

.modal-content {
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow);
}

.modal-header {
    border-bottom-color: var(--app-border);
    background: var(--app-surface-soft);
}

#float-back-top,
#back-top {
    z-index: 1080;
    gap: 8px;
}

#float-back-top .btn,
#back-top .btn {
    width: 42px;
    min-height: 42px;
    padding: 0;
    border-radius: 50%;
    box-shadow: var(--app-shadow-sm);
}

#has-read {
    z-index: 1090;
    background: rgba(22, 131, 90, .94) !important;
    color: #ffffff !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, .16);
}

.form-signin {
    max-width: 390px !important;
    padding: 28px !important;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: 12px;
    box-shadow: var(--app-shadow);
}

.form-signin h1 {
    font-weight: 760 !important;
}

.form-signin .form-floating + .form-floating {
    margin-top: 10px;
}

.form-signin .form-floating > .form-control {
    border-radius: var(--app-radius) !important;
}

.form-signin button[type="submit"] {
    margin-top: 12px;
}

.bd-placeholder-img,
.b-example-divider,
.b-example-vr,
.nav-scroller,
.bd-mode-toggle {
    display: none;
}

footer {
    color: var(--app-muted);
}

.app-empty,
.bg-body-tertiary {
    background: var(--app-surface) !important;
    border: 1px solid var(--app-border);
    box-shadow: var(--app-shadow-sm);
}

.app-hero {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow-sm);
    padding: 28px;
}

.app-hero h1 {
    margin-bottom: 10px;
    font-size: 30px;
}

.app-hero p {
    max-width: 680px;
    color: var(--app-muted);
}

.app-menu-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 14px;
}

.app-menu-link {
    display: flex;
    min-height: 86px;
    align-items: center;
    justify-content: space-between;
    padding: 18px;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow-sm);
    color: var(--app-text);
    font-weight: 720;
}

.app-menu-link:hover {
    border-color: #b7d4dc;
    background: #f4fbfc;
    color: var(--app-primary-strong);
}

.app-menu-arrow {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: #e7f3f6;
    color: var(--app-primary-strong);
}

.page-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
    margin: 22px 0;
}

.page-heading h1 {
    margin: 0;
    font-size: 26px;
}

.page-heading p {
    margin: 6px 0 0;
    color: var(--app-muted);
}

.toolbar-panel {
    margin-bottom: 16px;
    padding: 14px;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow-sm);
}

p.toolbar-panel {
    margin-top: 0;
}

.row.toolbar-panel {
    margin-left: 0;
    margin-right: 0;
}

.detail-panel {
    padding: 16px;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    box-shadow: var(--app-shadow-sm);
}

.meta-line {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    color: var(--app-muted);
}

.cover-preview {
    overflow: hidden;
    border: 1px solid var(--app-border);
    border-radius: var(--app-radius);
    background: var(--app-surface-soft);
}

@media (max-width: 768px) {
    body {
        font-size: 13px;
    }

    .container,
    .container-fluid {
        --bs-gutter-x: 1rem;
    }

    body > p.ms-3.mt-4 {
        padding: 12px;
    }

    .btn-group.w-100 {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 8px;
    }

    .btn-group.w-100 > .btn {
        border-radius: var(--app-radius) !important;
        width: 100%;
    }

    .app-hero {
        padding: 20px;
    }

    .app-hero h1,
    .page-heading h1 {
        font-size: 23px;
    }

    .page-heading {
        align-items: flex-start;
        flex-direction: column;
    }

    .card {
        margin-bottom: 16px !important;
    }

    .img-bg {
        max-height: 240px !important;
    }

    .table-responsive {
        border-radius: 0;
        border-left: 0;
        border-right: 0;
    }

    #float-back-top,
    #back-top {
        right: 12px !important;
        bottom: 16px !important;
    }
}