/* ===========================
   Matrix Dark Neon Theme
   =========================== */

:root {
    --bg: #0b0f16;
    --bg-elevated: #111827;
    --bg-card: #0f172a;
    --panel: #0d1424;
    --border: #1f2937;
    --text: #d8e5ff;
    --text-soft: #9fb3d1;
    --muted: #8090ad;
    --primary: #39ff14;
    --primary-soft: rgba(57, 255, 20, 0.16);
    --primary-glow: 0 0 15px rgba(57,255,20,0.35);
    --primary-strong-glow: 0 0 30px rgba(57,255,20,0.4);
    --accent: #22d3ee;
    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #10b981;
    --shadow: 0 10px 40px rgba(0,0,0,0.45);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
    --card-border: 1px solid #1f2937;
    --grid-gap: 1.25rem;
    --blur: blur(14px);
    --font: 'Segoe UI', 'Microsoft YaHei', Inter, system-ui, -apple-system, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: var(--font);
    line-height: 1.7;
    color: var(--text);
    background: radial-gradient(circle at 15% 20%, rgba(57,255,20,0.06), transparent 30%),
                radial-gradient(circle at 80% 10%, rgba(34,211,238,0.08), transparent 32%),
                var(--bg);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    letter-spacing: 0.1px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--primary); text-shadow: var(--primary-glow); }

.container { max-width: 1240px; margin: 0 auto; padding: 0 20px; width: 100%; }
.main-content { flex: 1; padding: 2rem 0 3rem; }

/* 登录提示样式 */
.login-hint {
    color: var(--muted);
    font-style: italic;
    margin-left: 10px;
}

.custom-content-section {
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: var(--card-border);
}

.custom-content {
    line-height: 1.8;
}

.custom-content h1, .custom-content h2, .custom-content h3, 
.custom-content h4, .custom-content h5, .custom-content h6 {
    color: var(--primary);
    margin: 1.5rem 0 0.8rem 0;
}

.custom-content p {
    margin-bottom: 1rem;
}

.custom-content a {
    color: var(--accent);
}

.custom-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    margin: 1rem 0;
}

/* === Navbar === */
.navbar {
    position: sticky;
    top: 0;
    z-index: 999;
    background: rgba(11,15,22,0.9);
    backdrop-filter: var(--blur);
    border-bottom: 1px solid #1f2937;
    box-shadow: var(--shadow);
}
.navbar .container { display: flex; align-items: center; gap: 16px; padding: 14px 20px; }
.nav-brand a {
    font-size: 1.5rem; font-weight: 700; color: var(--primary);
    letter-spacing: 0.5px; text-shadow: var(--primary-glow);
}
.nav-menu { display: flex; align-items: center; gap: 18px; flex: 1; flex-wrap: wrap; }
.nav-menu a {
    padding: 10px 14px; color: var(--text); border-radius: var(--radius-sm);
    border: 1px solid transparent; transition: all 0.2s;
}
.nav-menu a:hover { border-color: rgba(57,255,20,0.25); color: var(--primary); box-shadow: var(--primary-glow); }
.nav-search-form input {
    background: var(--panel); border: 1px solid #1f2937; color: var(--text);
    padding: 10px 12px; border-radius: var(--radius-sm); width: 240px;
}
.nav-search-form button { padding: 10px 12px; }

/* === Buttons === */
.btn {
    display: inline-flex; align-items: center; justify-content: center;
    padding: 0.7rem 1.2rem; border-radius: var(--radius-sm);
    border: 1px solid transparent; cursor: pointer; font-weight: 600;
    transition: all 0.2s; text-decoration: none;
}
.btn-primary { background: linear-gradient(120deg, #22d3ee, #39ff14); color: #04100a; box-shadow: var(--primary-strong-glow); }
.btn-primary:hover { filter: brightness(1.05); }
.btn-secondary { background: var(--panel); color: var(--text); border-color: #1f2937; }
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--primary-glow); }
.btn-danger { background: #ef4444; color: #fff; }
.btn-sm { padding: 0.5rem 0.9rem; font-size: 0.9rem; }
.btn-xs { padding: 0.35rem 0.65rem; font-size: 0.8rem; }
.btn-block { width: 100%; }

/* === Cards & Surfaces === */
.card {
    background: linear-gradient(145deg, rgba(15,23,42,0.9), rgba(15,23,42,0.75));
    border: var(--card-border); border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 1.5rem;
}
.glass {
    background: rgba(15,23,42,0.65);
    border: 1px solid rgba(57,255,20,0.2);
    backdrop-filter: var(--blur);
    box-shadow: var(--primary-glow);
}

/* === Flash === */
.flash-messages { max-width: 1240px; margin: 0 auto 1.5rem; padding: 0 20px; }
.flash-message {
    padding: 1rem 1.25rem; border-radius: var(--radius-sm);
    border: 1px solid; background: var(--panel); color: var(--text);
    box-shadow: var(--shadow);
}
.flash-success { border-color: rgba(16,185,129,0.6); color: #a7f3d0; }
.flash-error { border-color: rgba(239,68,68,0.6); color: #fecdd3; }
.flash-info { border-color: rgba(34,211,238,0.6); color: #cffafe; }

/* === Hero === */
.hero-section {
    margin: 2rem 0 3rem;
    padding: 3rem 2rem;
    background: radial-gradient(circle at 20% 20%, rgba(57,255,20,0.08), transparent 40%),
                radial-gradient(circle at 80% 10%, rgba(34,211,238,0.1), transparent 45%),
                linear-gradient(135deg, #0f172a, #0b1222);
    border: var(--card-border); border-radius: var(--radius-lg); box-shadow: var(--shadow);
    text-align: center;
}
.hero-title { font-size: 2.6rem; margin-bottom: 1rem; color: var(--text); text-shadow: var(--primary-glow); }
.hero-subtitle { color: var(--muted); margin-bottom: 1.5rem; }
.hero-actions { display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; }

/* === Sections & Titles === */
.section-title { font-size: 1.6rem; margin-bottom: 1rem; color: var(--text); }
.page-title { font-size: 2rem; margin-bottom: 1.5rem; color: var(--text); }
.section-sub { color: var(--muted); margin-bottom: 1.5rem; }

/* === Grid Cards === */
.features-grid, .articles-grid, .software-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: var(--grid-gap);
}
.feature-card, .article-card, .software-card {
    background: var(--bg-card); border: var(--card-border); border-radius: var(--radius);
    padding: 1.5rem; box-shadow: var(--shadow); position: relative; overflow: hidden;
    transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.feature-card::after, .article-card::after, .software-card::after {
    content: ""; position: absolute; inset: 0; pointer-events: none;
    background: radial-gradient(circle at 20% 20%, rgba(57,255,20,0.08), transparent 40%);
}
.feature-card:hover, .article-card:hover, .software-card:hover {
    transform: translateY(-4px);
    border-color: rgba(57,255,20,0.25);
    box-shadow: var(--primary-glow);
}
.feature-icon { font-size: 2.6rem; margin-bottom: 0.5rem; color: var(--primary); }
.article-meta, .software-meta { color: var(--muted); font-size: 0.95rem; }
.software-version { color: var(--accent); font-weight: 600; }
.text-center { text-align: center; }

/* === Forms === */
.form-group { margin-bottom: 1.25rem; }
.form-group label { display: block; margin-bottom: 0.4rem; color: var(--text); font-weight: 600; }
.form-control {
    width: 100%; padding: 0.75rem 0.9rem; border-radius: var(--radius-sm);
    border: 1px solid #1f2937; background: var(--panel); color: var(--text);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: var(--primary-glow); }
.form-text { color: var(--muted); font-size: 0.9rem; margin-top: 0.35rem; }
.code-input-group { display: flex; gap: 0.6rem; }
.tip { color: var(--muted); font-size: 0.9rem; }

/* === Auth / Card Containers === */
.auth-container { display: flex; justify-content: center; align-items: center; min-height: 60vh; padding: 2rem 0; }
.auth-card, .form-container, .article-detail, .software-detail, .post-detail, .admin-section, .posts-list, .articles-list, .software-list, .table-container {
    background: var(--bg-card); border: var(--card-border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 1.75rem;
}
.auth-title { text-align: center; margin-bottom: 1.5rem; color: var(--primary); text-shadow: var(--primary-glow); }

/* === Tables === */
.table-container { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; }
.data-table th, .data-table td { padding: 0.9rem; border-bottom: 1px solid #1f2937; color: var(--text); }
.data-table th { background: #0c1322; font-weight: 700; text-transform: uppercase; font-size: 0.9rem; }
.data-table tr:hover { background: rgba(57,255,20,0.04); }
.badge { padding: 0.3rem 0.7rem; border-radius: 999px; font-weight: 700; font-size: 0.85rem; }
.badge-success { background: rgba(16,185,129,0.15); color: #6ee7b7; }
.badge-warning { background: rgba(245,158,11,0.18); color: #fcd34d; }
.badge-danger { background: rgba(239,68,68,0.15); color: #fecdd3; }
.badge-info { background: rgba(34,211,238,0.14); color: #99f6e4; }
.admin-badge { background: rgba(239,68,68,0.2); color: #fecaca; padding: 0.2rem 0.6rem; border-radius: 8px; font-weight: 700; }

/* === Admin nav / cards === */
.admin-nav { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.admin-nav-item {
    background: var(--panel); color: var(--text); border: 1px solid #1f2937;
    padding: 0.75rem 1.1rem; border-radius: var(--radius-sm); box-shadow: var(--shadow);
}
.admin-nav-item:hover { border-color: var(--primary); color: var(--primary); box-shadow: var(--primary-glow); }
.admin-header { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; align-items: center; margin-bottom: 1.25rem; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); gap: var(--grid-gap); }
.stat-card { background: var(--panel); border: var(--card-border); border-radius: var(--radius); padding: 1.4rem; text-align: left; }
.stat-card h3 { color: var(--muted); margin-bottom: 0.4rem; }
.stat-number { font-size: 2rem; font-weight: 800; color: var(--primary); text-shadow: var(--primary-glow); }

/* === Community === */
.community-header { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem; }
.posts-list { padding: 0; }
.post-item { padding: 1.25rem 1.5rem; border-bottom: 1px solid #1f2937; position: relative; transition: background 0.2s, border-color 0.2s; }
.post-item:hover { background: rgba(57,255,20,0.03); border-color: rgba(57,255,20,0.25); }
.post-item.pinned { border-left: 4px solid var(--primary); background: rgba(57,255,20,0.06); }
.post-title a { color: var(--text); font-size: 1.2rem; font-weight: 700; }
.post-title a:hover { color: var(--primary); }
.post-meta { display: flex; gap: 1rem; color: var(--muted); font-size: 0.95rem; flex-wrap: wrap; }
.post-stats { margin-left: auto; color: var(--muted); }
.post-detail { margin-bottom: 1.5rem; }
.post-actions { display: flex; gap: 0.5rem; flex-wrap: wrap; margin: 1rem 0; }
.post-content { margin: 1.5rem 0; line-height: 1.8; }
.post-content img, .comment-content img, .article-content img { max-width: 100%; height: auto; border-radius: var(--radius-sm); }

.comments-section { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid #1f2937; }
.comments-section h3 { color: var(--text); margin-bottom: 1rem; }
.comment-form { background: var(--panel); border: var(--card-border); border-radius: var(--radius); padding: 1.2rem; }
.comment-item {
    padding: 1.1rem; border: 1px solid #1f2937; border-radius: var(--radius-sm);
    background: #0f172a; margin-bottom: 0.9rem;
}
.comment-header { display: flex; gap: 0.8rem; align-items: center; flex-wrap: wrap; }
.comment-author { font-weight: 700; color: var(--text); }
.comment-time { color: var(--muted); font-size: 0.9rem; }
.comment-content { color: var(--text); line-height: 1.6; }
.comment-actions { margin-left: auto; display: flex; gap: 0.4rem; }
.comment-reply { border-left: 2px solid rgba(57,255,20,0.3); padding-left: 10px; }
.comment-replies { border-left: 1px dashed #1f2937; margin-left: 10px; padding-left: 10px; }

.comment-author-avatar, .post-author-avatar {
    border: 1px solid rgba(57,255,20,0.25);
    box-shadow: 0 0 8px rgba(57,255,20,0.18);
}

/* === Tabs === */
.tabs { display: flex; gap: 0.5rem; border-bottom: 1px solid #1f2937; margin-bottom: 1rem; }
.tab-btn { padding: 0.75rem 1.2rem; border: none; background: transparent; color: var(--muted); border-bottom: 2px solid transparent; cursor: pointer; }
.tab-btn.active { color: var(--primary); border-bottom-color: var(--primary); }

/* === Profile === */
.profile-container { display: grid; grid-template-columns: 260px 1fr; gap: 1.25rem; margin-top: 1.2rem; }
.profile-sidebar, .profile-content {
    background: var(--bg-card); border: var(--card-border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.4rem;
}
.avatar-img {
    width: 120px;
    height: 120px;
    border: 2px solid rgba(57,255,20,0.4);
    border-radius: 50%;
    object-fit: cover;
    display: block;
    margin: 0 auto;
}

.avatar-placeholder {
    width: 120px;
    height: 120px;
    border: 2px solid var(--border);
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg);
    font-weight: bold;
    font-size: 48px;
    text-transform: uppercase;
    margin: 0 auto;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    letter-spacing: 2px;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.15);
}

/* === Modal === */
.modal { display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.7); z-index: 1000; }
.modal-content {
    background: var(--bg-card); border: 1px solid #1f2937; border-radius: var(--radius);
    width: 92%; max-width: 520px; margin: 5% auto; padding: 1.5rem; position: relative; box-shadow: var(--shadow);
}
.close { position: absolute; right: 1rem; top: 0.8rem; color: var(--muted); font-size: 1.6rem; cursor: pointer; }
.close:hover { color: var(--primary); }

/* === Footer === */
.footer { background: #0c1322; color: var(--muted); text-align: center; padding: 2rem 0; border-top: 1px solid #1f2937; margin-top: 2rem; }
.footer a { color: var(--primary); }

/* === Empty state === */
.empty-state { text-align: center; padding: 2rem; color: var(--muted); }

/* === Quill dark tweak === */
.ql-container.ql-snow { 
    border: 1px solid #1f2937 !important; 
    background: var(--bg-card) !important; 
    color: var(--text) !important; 
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}
.ql-toolbar.ql-snow { 
    border: 1px solid #1f2937 !important; 
    background: var(--bg-elevated) !important; 
    display: block !important;
    visibility: visible !important;
}
.ql-editor { 
    min-height: 180px !important; 
    background: var(--bg-card) !important; 
    color: var(--text) !important;
    font-size: 1rem !important;
    line-height: 1.6 !important;
    display: block !important;
    visibility: visible !important;
    opacity: 1 !important;
}
.ql-editor.ql-blank::before {
    color: var(--text-soft) !important;
    left: 0 !important;
    right: auto !important;
}
.ql-editor p, .ql-editor ul, .ql-editor ol, .ql-editor h1, .ql-editor h2, .ql-editor h3, .ql-editor h4, .ql-editor h5, .ql-editor h6, .ql-editor blockquote, .ql-editor pre {
    color: var(--text) !important;
}
.ql-editor a {
    color: var(--primary) !important;
}
.ql-editor:focus {
    outline: none;
    border-color: var(--primary) !important;
}
.ql-tooltip {
    background: var(--bg-elevated) !important;
    border: 1px solid var(--border) !important;
    color: var(--text) !important;
}
.ql-tooltip input {
    background: var(--bg-card) !important;
    color: var(--text) !important;
    border: 1px solid var(--border) !important;
}

/* === Images === */
.post-content img, .comment-content img, .article-content img {
    max-width: 100%; height: auto; max-height: 360px; object-fit: contain; cursor: zoom-in;
    border: 1px solid rgba(57,255,20,0.2);
}

/* === Responsive === */
@media (max-width: 992px) {
    .nav-search-form input { width: 180px; }
    .profile-container { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .navbar .container { flex-direction: column; align-items: flex-start; }
    .nav-menu { width: 100%; justify-content: space-between; }
    .nav-search-form { width: 100%; }
    .nav-search-form input { width: 100%; }
    .hero-title { font-size: 2.2rem; }
    .hero-section { padding: 2.2rem 1.5rem; }
    .articles-grid, .software-grid, .features-grid { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: 1fr; }
    .post-actions, .community-header, .admin-header { flex-direction: column; align-items: flex-start; }
    .btn, .btn-sm { width: 100%; }
}
@media (max-width: 480px) {
    .hero-title { font-size: 1.8rem; }
    .section-title, .page-title { font-size: 1.4rem; }
    .data-table { font-size: 0.85rem; }
}

/* 置顶样式 */
.pin-badge {
    position: absolute;
    top: -5px;
    right: -5px;
    background: var(--primary);
    color: var(--bg);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 10;
}

/* 文章卡片网格布局 */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.article-card.pinned {
    background: var(--primary-soft);
    border: 2px solid var(--primary);
}

.article-card.pinned:hover {
    transform: translateY(-6px);
    box-shadow: var(--primary-glow);
}

.article-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: 0.75rem;
    gap: 0.5rem;
}

.article-card h3,
.article-card h3 a {
    color: var(--text);
    text-decoration: none;
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 0;
}

.article-card h3 a:hover {
    color: var(--primary);
}

.article-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--text-soft);
}

.article-card.pinned {
    border: 2px solid var(--primary);
    background: var(--primary-soft);
}

.article-card.pinned:hover {
    transform: translateY(-4px);
    box-shadow: var(--primary-glow);
}

/* 软件卡片网格布局 */
.software-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.software-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.software-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.software-card.pinned {
    border: 2px solid var(--primary);
    background: var(--primary-soft);
}

.software-card.pinned:hover {
    transform: translateY(-4px);
    box-shadow: var(--primary-glow);
}

/* 社区帖子卡片网格布局 */
.posts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.post-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: all 0.3s ease;
    position: relative;
}

.post-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.post-card.pinned {
    border: 2px solid var(--primary);
    background: var(--primary-soft);
}

.post-card.pinned:hover {
    transform: translateY(-4px);
    box-shadow: var(--primary-glow);
}

/* 社区帖子样式 */
.post-item {
    position: relative;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
    background: var(--bg-card);
}

.post-item:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
    border-color: var(--accent);
}

.post-item.pinned {
    border: 2px solid var(--primary);
    background: var(--primary-soft);
}

.post-item.pinned:hover {
    transform: translateY(-3px);
    box-shadow: var(--primary-glow);
}

/* 卡片内容样式 */
.article-card h3,
.software-card h3,
.post-item .post-title {
    margin: 0 0 1rem 0;
    line-height: 1.4;
}

.article-card h3 a,
.software-card h3 a,
.post-item .post-title a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}

.article-card h3 a:hover,
.software-card h3 a:hover,
.post-item .post-title a:hover {
    color: var(--accent);
    text-shadow: var(--primary-glow);
}

.article-meta,
.software-meta,
.post-item .post-meta {
    color: var(--muted);
    font-size: 0.875rem;
    line-height: 1.5;
}

.article-meta span,
.software-meta span,
.post-item .post-meta span {
    display: inline-block;
    margin-right: 1rem;
}

.software-version {
    color: var(--text-soft);
    font-size: 0.875rem;
    margin: 0.5rem 0;
}

.software-desc {
    color: var(--text);
    line-height: 1.5;
    margin: 0.5rem 0;
}