/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --text: #1e293b;
    --text-light: #64748b;
    --border: #e2e8f0;
    --shadow: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-lg: 12px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }
video { max-width: 100%; display: block; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* ===== Header ===== */
.site-header {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}
.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 0;
}
.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}
.logo:hover { color: var(--primary); }
.logo-icon { font-size: 1.5rem; color: var(--primary); }

.main-nav { display: flex; gap: 8px; }
.main-nav a {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 6px;
    color: var(--text-light);
    font-weight: 500;
    transition: all 0.2s;
}
.main-nav a:hover, .main-nav a.active {
    background: var(--primary-light);
    color: var(--primary);
}
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text);
    padding: 4px 8px;
}

/* ===== Main ===== */
.site-main { flex: 1; padding: 32px 0; }

/* ===== Profile Card ===== */
.profile-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 32px;
    margin-bottom: 24px;
}
.profile-header {
    display: flex;
    gap: 24px;
    align-items: flex-start;
    margin-bottom: 24px;
}
.profile-avatar { flex-shrink: 0; }
.avatar-placeholder {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
}
.profile-info { flex: 1; min-width: 0; }
.profile-info h1 { font-size: 1.75rem; margin-bottom: 4px; }
.profile-motto { color: var(--accent); font-style: italic; margin-bottom: 8px; }
.profile-bio { color: var(--text-light); line-height: 1.8; }
.profile-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}
.detail-section h3 {
    font-size: 1rem;
    margin-bottom: 10px;
    color: var(--text-light);
}

.tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    white-space: nowrap;
}
.tag-hobby { background: #fef3c7; color: #b45309; }
.tag-skill { background: var(--primary-light); color: var(--primary); }
.tag-small { background: var(--bg); color: var(--text-light); font-size: 0.75rem; }

/* ===== Dynamic Hint ===== */
.dynamic-hint {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border-radius: var(--radius);
    padding: 16px 20px;
    margin-bottom: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}
.hint-badge { font-weight: 700; font-size: 1rem; white-space: nowrap; flex-shrink: 0; }
.hint-content { display: flex; flex-wrap: wrap; gap: 10px; }
.hint-link {
    display: inline-block;
    background: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--text);
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}
.hint-link:hover { transform: translateY(-1px); color: var(--primary); }

/* ===== Ad Banner ===== */
.ad-banner { margin-bottom: 24px; text-align: center; }
.ad-content { position: relative; display: inline-block; }
.ad-label {
    position: absolute;
    top: 4px;
    left: 4px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    font-size: 0.7rem;
    padding: 2px 6px;
    border-radius: 4px;
    z-index: 2;
}
.ad-image {
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: block;
}

/* ===== Section ===== */
.home-section { margin-bottom: 36px; }
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}
.section-header h2 { font-size: 1.35rem; }
.more-link { font-size: 0.9rem; font-weight: 500; }

/* ===== Article Grid ===== */
.article-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.article-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s;
}
.article-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.article-card > a {
    display: block;
    color: inherit;
    text-decoration: none;
}
.article-card > a:hover { color: inherit; }
.article-thumb {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
    background: #e2e8f0;
}
.article-card-body { padding: 16px; }
.article-category {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 8px;
}
.article-card-body h3 {
    font-size: 1.05rem;
    margin-bottom: 8px;
    line-height: 1.4;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.article-summary {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 10px;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}
.article-date { color: var(--text-light); font-size: 0.8rem; display: block; }

/* ===== Gallery Grid (Home) ===== */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}
.gallery-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    background: #e2e8f0;
}
.gallery-card::before {
    content: '';
    display: block;
    padding-bottom: 75%;
}
.gallery-card img,
.gallery-card video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.gallery-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.75));
    color: #fff;
    padding: 16px;
}
.gallery-type-badge {
    display: inline-block;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 4px;
}
.gallery-card .gallery-type-badge { background: var(--accent); color: #fff; }
.gallery-card-overlay h4 { font-size: 0.95rem; }
.gallery-card-overlay time { font-size: 0.75rem; opacity: 0.8; }

/* ===== Page Title ===== */
.page-title { font-size: 1.5rem; margin-bottom: 24px; }

/* ===== Filter Bar ===== */
.filter-bar {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}
.filter-form {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    align-items: center;
}
.filter-form input,
.filter-form select {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    color: var(--text);
    background: #fff;
}
.filter-form input:focus,
.filter-form select:focus {
    outline: none;
    border-color: var(--primary);
}
.filter-form button,
.btn-reset {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    font-weight: 500;
}
.filter-form button { background: var(--primary); color: #fff; }
.filter-form button:hover { background: var(--primary-dark); }
.btn-reset {
    background: var(--border);
    color: var(--text);
    display: inline-block;
}
.btn-reset:hover { background: #cbd5e1; color: var(--text); }

/* ===== Article List ===== */
.article-list { display: flex; flex-direction: column; gap: 16px; }
.article-item {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.2s;
}
.article-item:hover { transform: translateY(-2px); }
.article-item-link {
    display: flex;
    gap: 20px;
    color: var(--text);
    text-decoration: none;
}
.article-item-link:hover { color: var(--text); }
.article-item-thumb {
    width: 240px;
    flex-shrink: 0;
    object-fit: cover;
    display: block;
    background: #e2e8f0;
}
.article-item-body {
    padding: 16px 16px 16px 0;
    flex: 1;
    min-width: 0;
}
.article-item-meta {
    display: flex;
    gap: 12px;
    align-items: center;
    margin-bottom: 8px;
}
.article-item-meta time { color: var(--text-light); font-size: 0.8rem; }
.article-item-body h3 { font-size: 1.15rem; margin-bottom: 8px; }
.article-item-body > p { color: var(--text-light); font-size: 0.9rem; }

/* ===== Article Detail ===== */
.breadcrumb { margin-bottom: 20px; font-size: 0.9rem; color: var(--text-light); }
.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.article-full {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}
.article-full-header { padding: 28px 28px 16px; }
.article-full-header h1 { font-size: 1.6rem; margin-bottom: 12px; }
.article-full-meta { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.article-full-image {
    width: 100%;
    max-height: 420px;
    object-fit: cover;
    display: block;
    background: #e2e8f0;
}
.article-full-content { padding: 20px 28px 28px; line-height: 1.9; }
.article-full-content h3 { margin: 20px 0 10px; }
.article-full-content p { margin-bottom: 16px; }
.related-articles { margin-top: 32px; }
.related-articles h3 { margin-bottom: 16px; }

/* ===== Gallery Full ===== */
.gallery-grid-full {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}
.gallery-item-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform 0.2s;
}
.gallery-item-card:hover { transform: translateY(-2px); }
.gallery-item-media {
    position: relative;
    background: #e2e8f0;
}
.gallery-item-media::before {
    content: '';
    display: block;
    padding-bottom: 75%;
}
.gallery-item-media img,
.gallery-item-media video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.gallery-item-media img { cursor: pointer; }
.gallery-item-info { padding: 14px 16px; }
.gallery-item-info .gallery-type-badge {
    background: var(--primary);
    color: #fff;
    display: inline-block;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 4px;
}
.gallery-item-info h3 { font-size: 1.05rem; margin: 6px 0 4px; }
.gallery-item-info time { font-size: 0.8rem; color: var(--text-light); }
.gallery-item-info p { font-size: 0.85rem; color: var(--text-light); margin-top: 4px; }

/* ===== Lightbox ===== */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    z-index: 1000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.lightbox.show { display: flex; }
.lightbox img {
    max-width: 90%;
    max-height: 80vh;
    border-radius: var(--radius);
    object-fit: contain;
}
.lightbox p { color: #fff; margin-top: 12px; font-size: 1rem; }
.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
    line-height: 1;
}

/* ===== Guestbook ===== */
.message-form-section {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-bottom: 32px;
}
.message-form-section h3 { margin-bottom: 16px; }
.message-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 4px; }
.form-group label { font-weight: 500; font-size: 0.9rem; }
.required { color: #ef4444; }
.form-group input,
.form-group textarea,
.form-group select {
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    font-family: inherit;
    background: #fff;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}
.char-count { font-size: 0.8rem; color: var(--text-light); text-align: right; }
.btn-primary {
    display: inline-block;
    padding: 10px 28px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    align-self: flex-start;
    transition: background 0.2s;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-danger {
    background: #ef4444;
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    padding: 6px 14px;
    font-size: 0.85rem;
}
.btn-danger:hover { background: #dc2626; }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }

.alert {
    padding: 12px 16px;
    border-radius: 6px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}
.alert-success { background: #dcfce7; color: #166534; border: 1px solid #bbf7d0; }

.message-list-section h3 { margin-bottom: 16px; }
.message-list { display: flex; flex-direction: column; gap: 16px; }
.message-item {
    display: flex;
    gap: 14px;
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}
.message-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    flex-shrink: 0;
}
.message-body { flex: 1; min-width: 0; }
.message-header {
    display: flex;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 6px;
}
.message-email { color: var(--text-light); font-size: 0.8rem; }
.message-content { color: var(--text); line-height: 1.7; word-break: break-word; }

/* ===== Friend Links ===== */
.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.friend-link {
    display: inline-block;
    padding: 8px 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 20px;
    color: var(--link);
    font-size: 0.9rem;
    transition: all 0.2s;
}
.friend-link:hover {
    background: var(--link);
    color: #fff;
    border-color: var(--link);
    text-decoration: none;
}

/* ===== Quick Search ===== */
.quick-search h2 { margin-bottom: 12px; }
.search-box { display: flex; gap: 10px; }
.search-box input {
    flex: 1;
    padding: 10px 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.95rem;
    min-width: 0;
}
.search-box input:focus { outline: none; border-color: var(--primary); }
.search-box button {
    padding: 10px 24px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.95rem;
    white-space: nowrap;
}
.search-results { margin-top: 16px; }
.search-result-item {
    background: var(--bg-card);
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 8px;
    box-shadow: var(--shadow);
}
.search-result-item a { font-weight: 500; }
.search-result-item p { font-size: 0.85rem; color: var(--text-light); margin-top: 4px; }

/* ===== Admin ===== */
.admin-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
}
.admin-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 24px;
}
.admin-card h2 {
    font-size: 1.15rem;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border);
}
.admin-form { display: flex; flex-direction: column; gap: 12px; }
.admin-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.admin-table th,
.admin-table td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}
.admin-table th { background: var(--bg); font-weight: 600; }
.manage-section { margin-bottom: 24px; overflow-x: auto; }

/* ===== Error Page ===== */
.error-page { text-align: center; padding: 80px 0; }
.error-page h1 { font-size: 5rem; color: var(--primary); margin-bottom: 12px; }
.error-page p { color: var(--text-light); margin-bottom: 24px; }

/* ===== Empty State ===== */
.empty-state { text-align: center; padding: 40px; color: var(--text-light); }

/* ===== Footer ===== */
.site-footer {
    background: var(--text);
    color: #cbd5e1;
    padding: 36px 0 20px;
    margin-top: auto;
}
.footer-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-bottom: 24px;
}
.footer-section h4 { color: #fff; margin-bottom: 10px; font-size: 1rem; }
.footer-section p { font-size: 0.9rem; line-height: 1.7; }
.friend-links { list-style: none; }
.friend-links li { margin-bottom: 4px; }
.friend-links a { color: #94a3b8; font-size: 0.9rem; }
.friend-links a:hover { color: #fff; }
.footer-bottom {
    border-top: 1px solid #334155;
    padding-top: 16px;
    text-align: center;
    font-size: 0.85rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .main-nav {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-card);
        border-bottom: 1px solid var(--border);
        padding: 12px;
        box-shadow: var(--shadow-md);
    }
    .main-nav.show { display: flex; }
    .mobile-menu-btn { display: block; }

    .profile-header { flex-direction: column; align-items: center; text-align: center; }
    .profile-details { grid-template-columns: 1fr; }
    .article-grid, .gallery-grid { grid-template-columns: 1fr; }
    .article-item-link { flex-direction: column; }
    .article-item-thumb { width: 100%; height: 200px; }
    .article-item-body { padding: 12px 16px; }
    .footer-content { grid-template-columns: 1fr; }
    .admin-grid { grid-template-columns: 1fr; }
    .gallery-grid-full { grid-template-columns: 1fr; }
    .filter-form { flex-direction: column; }
    .filter-form input,
    .filter-form select { width: 100%; }
}

@media (max-width: 480px) {
    .container { padding: 0 12px; }
    .profile-card { padding: 20px; }
}