/* ─── Default Theme Styles ──────────────────────── */

:root {
    --primary-color: #3b82f6;
    --text-color: #1f2937;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --border-color: #e5e7eb;
    --muted-color: #6b7280;
}

body {
    background: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
}

a {
    color: var(--text-color);
    transition: color 0.2s;
}
a:hover {
    color: var(--primary-color);
}

/* ─── Site Header ─────────────────────────────── */
.site-header {
    background: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
}
.site-logo {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    color: var(--text-color);
    text-decoration: none;
}
.site-logo:hover {
    color: var(--primary-color);
}
.header-inner .nav-link {
    color: #4b5563 !important;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.25rem 0 !important;
    margin: 0 0.75rem;
    transition: color 0.2s;
}
.header-inner .nav-link:hover {
    color: var(--primary-color) !important;
}
.header-inner .navbar-toggler {
    border: none;
    padding: 0.25rem 0.5rem;
}
.header-inner .navbar-nav {
    align-items: center;
}

/* Mega Dropdown */
.mega-dropdown.show {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 1rem;
}
.mega-dropdown {
    min-width: 500px;
    max-width: 720px;
    padding: 1.25rem !important;
}
.mega-dropdown > li {
    break-inside: avoid;
}
.mega-dropdown > li > a:first-child {
    font-weight: 600;
    color: var(--primary-color);
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.4rem;
    padding-bottom: 0.3rem;
}
@media (max-width: 768px) {
    .mega-dropdown {
        min-width: auto !important;
        max-width: 100%;
        grid-template-columns: 1fr;
    }
}

/* ─── Main Container ──────────────────────────── */
main.container {
    max-width: 1100px;
    margin-top: 2rem;
}

/* ─── Card ────────────────────────────────────── */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    transition: box-shadow 0.2s;
}
.card:hover {
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.card-header {
    background: transparent;
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 1rem;
    color: #4b5563;
    padding: 1rem 1.5rem;
}
.card-body {
    padding: 1.5rem;
}
.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}
.card-title a {
    color: var(--text-color);
    text-decoration: none;
}
.card-title a:hover {
    color: var(--primary-color);
}

/* Article card featured image spacing */
.card .row.g-0 > .col-md-4 {
    padding: 0.25rem;
}

/* ─── Article / Page content ──────────────────── */
.article-content img,
.page-content img {
    max-width: 100% !important;
    height: auto !important;
    border-radius: 4px;
}
.article-content iframe, .article-content video, .article-content table,
.page-content iframe, .page-content video, .page-content table {
    max-width: 100% !important;
}
.col-md-8 { min-width: 0; }
.article-content p,
.page-content p {
    line-height: 1.8;
    margin-bottom: 1rem;
}
.article-content h2, .article-content h3, .article-content h4,
.page-content h2, .page-content h3, .page-content h4 {
    margin-top: 1.5rem;
    margin-bottom: 1rem;
}
.article-content blockquote,
.page-content blockquote {
    border-left: 4px solid #6c757d;
    padding: 0.5rem 1rem;
    margin: 1rem 0;
    background: #f0f0f0;
}
.article-content table,
.page-content table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}
.article-content table th,
.article-content table td,
.page-content table th,
.page-content table td {
    border: 1px solid #dee2e6;
    padding: 0.5rem;
}

/* ─── Code block + copy button ────────────────── */
.article-content pre,
.page-content pre {
    position: relative;
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 1rem;
    padding-top: 2.5rem;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 0.9rem;
    line-height: 1.5;
}
.article-content pre code,
.page-content pre code {
    background: none;
    color: inherit;
    padding: 0;
    font-size: inherit;
}
.code-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 30px;
    background: rgba(255,255,255,0.08);
    border-radius: 6px 6px 0 0;
    display: flex;
    align-items: center;
    padding: 0 0.75rem;
}
.code-header .code-lang {
    color: #aaa;
    font-size: 0.75rem;
}
.copy-btn {
    position: absolute;
    top: 6px;
    right: 8px;
    background: rgba(255,255,255,0.12);
    border: 1px solid rgba(255,255,255,0.2);
    color: #ccc;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.2s;
}
.copy-btn:hover {
    background: rgba(255,255,255,0.25);
    color: #fff;
}
.copy-btn.copied {
    background: #28a745;
    border-color: #28a745;
}

/* ─── Post Meta ───────────────────────────────── */
.text-muted.small {
    color: var(--muted-color) !important;
    font-size: 0.85rem;
}

/* ─── Tags ────────────────────────────────────── */
.badge.bg-info {
    background-color: var(--primary-color) !important;
    color: #fff !important;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.3em 0.7em;
    border-radius: 4px;
    transition: opacity 0.15s;
}
.badge.bg-info:hover {
    color: #fff !important;
    opacity: 0.85;
}

/* ─── Buttons ─────────────────────────────────── */
.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}
.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}
.btn-primary:hover {
    background-color: #2563eb;
    border-color: #2563eb;
}

/* ─── Search form in header ───────────────────── */
.header-inner .form-control {
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    padding: 0.4rem 0.75rem;
}
.header-inner .form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.15rem rgba(59,130,246,0.15);
}
.header-inner .btn-outline-light {
    color: #4b5563;
    border-color: var(--border-color);
}
.header-inner .btn-outline-light:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

/* ─── Pagination ──────────────────────────────── */
.pagination .page-link {
    color: var(--text-color);
    border-color: var(--border-color);
}
.pagination .active .page-link {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}
.pagination .page-link:hover {
    color: var(--primary-color);
    background-color: #f9fafb;
}

/* ─── Footer ──────────────────────────────────── */
footer {
    background: #111827;
    color: #9ca3af;
    text-align: center;
    padding: 2.5rem 0;
    margin-top: 6rem;
    font-size: 0.85rem;
}
footer a {
    color: #9ca3af;
    text-decoration: none;
}
footer a:hover {
    color: #fff;
}

/* ─── Misc ────────────────────────────────────── */
h2.mb-4 {
    color: #4b5563;
    font-size: 1.35rem;
    font-weight: 600;
}
#captcha-img img {
    border-radius: 0 4px 4px 0;
}
hr {
    border-color: var(--border-color);
    opacity: 1;
}

/* ─── Comment reply thread ───────────────────── */
.comment-reply {
    margin-left: 2rem;
    margin-top: 0.75rem;
    border-left: 2px solid var(--border-color);
    padding: 0.5rem 0 0.5rem 0.75rem;
    font-size: 0.95rem;
}

/* ─── Responsive ──────────────────────────────── */
@media (max-width: 768px) {
    .site-logo {
        font-size: 1.1rem;
    }
    main.container {
        padding: 0 1rem;
    }
    .card-body {
        padding: 1.25rem;
    }
}

/* ─── Search highlight ───────────────────────── */
.search-highlight {
    background: #fef08a;
    color: #854d0e;
    padding: 0 2px;
    border-radius: 2px;
    font-weight: 600;
}