* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #00d4ff;
    --primary-hover: #00b8e6;
    --primary-dark: #0099cc;
    --primary-glow: rgba(0, 212, 255, 0.3);
    --accent: #7c3aed;
    --accent-glow: rgba(124, 58, 237, 0.3);
    --success: #00ff88;
    --success-bg: rgba(0, 255, 136, 0.1);
    --warning: #ffaa00;
    --warning-bg: rgba(255, 170, 0, 0.1);
    --error: #ff4466;
    --error-bg: rgba(255, 68, 102, 0.1);
    --bg: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: rgba(17, 24, 39, 0.8);
    --bg-card-hover: rgba(22, 32, 52, 0.9);
    --text: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(0, 212, 255, 0.15);
    --border-hover: rgba(0, 212, 255, 0.4);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.15);
    --radius: 8px;
    --radius-lg: 12px;
    --header-height: 64px;
    --gradient-primary: linear-gradient(135deg, #00d4ff 0%, #7c3aed 100%);
    --gradient-bg: linear-gradient(135deg, #0a0e1a 0%, #1a1040 50%, #0a0e1a 100%);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    background: var(--bg);
    background-image: var(--gradient-bg);
    background-attachment: fixed;
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-tap-highlight-color: transparent;
    -webkit-text-size-adjust: 100%;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(124, 58, 237, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 80%, rgba(0, 212, 255, 0.04) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

a { color: var(--primary); text-decoration: none; -webkit-tap-highlight-color: transparent; transition: color 0.2s; }
a:hover { color: var(--primary-hover); text-shadow: 0 0 8px var(--primary-glow); }
img { max-width: 100%; height: auto; }
button, input[type="text"], input[type="email"], input[type="password"], input[type="url"], input[type="number"], input[type="search"], textarea, select { -webkit-appearance: none; appearance: none; }

/* Custom Checkbox */
input[type="checkbox"] {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border);
    border-radius: 4px;
    background: rgba(17, 24, 39, 0.6);
    cursor: pointer;
    position: relative;
    flex-shrink: 0;
    transition: all 0.2s;
}
input[type="checkbox"]:checked {
    background: var(--gradient-primary);
    border-color: transparent;
}
input[type="checkbox"]:checked::after {
    content: '';
    position: absolute;
    left: 4px;
    top: 1px;
    width: 6px;
    height: 10px;
    border: solid #fff;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}
input[type="checkbox"]:focus {
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.3);
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; position: relative; z-index: 1; }

/* Header */
.header {
    background: rgba(10, 14, 26, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--header-height);
}

.header-inner {
    display: flex;
    align-items: center;
    height: 100%;
    gap: 40px;
}

.logo {
    font-size: 22px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    text-shadow: none;
}
.logo:hover {
    text-shadow: none;
    filter: brightness(1.2);
}

.nav { display: flex; gap: 6px; }
.nav a {
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 8px;
    transition: all 0.2s;
    position: relative;
}
.nav a:hover {
    color: var(--primary);
    background: rgba(0, 212, 255, 0.08);
    text-shadow: none;
}

.header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-info { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.user-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 0 12px var(--primary-glow);
}

.mobile-menu-btn { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text); }

/* Mobile Menu */
.mobile-menu {
    display: none;
    background: rgba(10, 14, 26, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    padding: 8px 16px;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    z-index: 99;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    border-radius: 0 0 16px 16px;
}
.mobile-menu.open { display: block; animation: slideDown 0.3s ease; }
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-12px); }
    to { opacity: 1; transform: translateY(0); }
}
.mobile-menu a {
    display: block;
    padding: 14px 16px;
    border-bottom: 1px solid rgba(0, 212, 255, 0.08);
    color: var(--text-secondary);
    border-radius: 10px;
    margin: 4px 0;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s;
}
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover {
    background: rgba(0, 212, 255, 0.08);
    color: var(--primary);
    text-shadow: none;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    cursor: pointer;
    transition: all 0.25s;
    text-align: center;
    backdrop-filter: blur(8px);
}
.btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
    text-shadow: none;
}
.btn-primary {
    background: var(--gradient-primary);
    color: #fff !important;
    border: none;
    box-shadow: 0 4px 16px rgba(0, 212, 255, 0.3);
}
.btn-primary:hover {
    box-shadow: 0 4px 24px rgba(0, 212, 255, 0.5);
    transform: translateY(-1px);
    text-shadow: none;
}
.btn-outline {
    background: transparent;
    border-color: rgba(255,255,255,0.3);
    color: #fff;
}
.btn-outline:hover {
    border-color: #fff;
    color: #fff !important;
    background: rgba(255,255,255,0.1);
    text-shadow: none;
}
.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: 6px; }
.btn-lg { padding: 12px 32px; font-size: 16px; border-radius: 10px; }
.btn-block { width: 100%; }
.btn-success {
    background: var(--success);
    color: #0a0e1a !important;
    border: none;
    font-weight: 600;
}
.btn-success:hover { box-shadow: 0 0 20px rgba(0, 255, 136, 0.3); }

/* Main */
.main { padding-bottom: 60px; position: relative; z-index: 1; }
.page { display: none; }
.page.active { display: block; }

/* Hero */
.hero {
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.15) 0%, rgba(124, 58, 237, 0.15) 100%);
    border-bottom: 1px solid var(--border);
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 30% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(124, 58, 237, 0.1) 0%, transparent 50%);
    pointer-events: none;
}
.hero h1 {
    font-size: 42px;
    margin-bottom: 16px;
    font-weight: 800;
    background: linear-gradient(135deg, #fff 0%, var(--primary) 50%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
}
.hero p {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
    position: relative;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; position: relative; }

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
    margin-top: -40px;
    position: relative;
    z-index: 10;
}
.stat-card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: all 0.3s;
}
.stat-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}
.stat-number {
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.stat-label { font-size: 13px; color: var(--text-muted); margin-top: 4px; font-weight: 500; letter-spacing: 0.5px; text-transform: uppercase; }

/* Section */
.section { margin-top: 40px; }
.section-title {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: inline-block;
}

/* Categories Grid */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
}

.category-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 16px 14px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}
.category-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity 0.3s;
}
.category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-glow);
    border-color: var(--primary);
}
.category-card:hover::before { opacity: 1; }
.category-icon { font-size: 24px; margin-bottom: 8px; }
.category-name { font-size: 14px; font-weight: 700; margin-bottom: 4px; color: var(--text); }
.category-desc { font-size: 11px; color: var(--text-muted); margin-bottom: 8px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.category-meta { font-size: 11px; color: var(--primary); font-weight: 500; }

/* Post List */
.post-list { display: flex; flex-direction: column; gap: 10px; }

.post-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 20px 24px;
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all 0.3s;
    border: 1px solid var(--border);
    position: relative;
}
.post-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateX(4px);
}
.post-card-header { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.post-card-title { font-size: 17px; font-weight: 600; color: var(--text); transition: color 0.2s; }
.post-card:hover .post-card-title { color: var(--primary); }
.post-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 10px;
    font-size: 13px;
    color: var(--text-muted);
}
.post-card-meta span { display: flex; align-items: center; gap: 4px; }
.post-card-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 10px; }
.tag {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
    border: 1px solid rgba(0, 212, 255, 0.2);
    transition: all 0.2s;
}
.tag:hover { background: rgba(0, 212, 255, 0.2); border-color: var(--primary); }

/* Post Detail */
.post-detail {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}
.post-detail h1 { font-size: 28px; margin-bottom: 12px; font-weight: 700; }
.post-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    padding-bottom: 16px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    color: var(--text-muted);
}
.post-detail-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    white-space: pre-wrap;
}
.post-detail-tags { margin-top: 20px; }

.breadcrumb {
    font-size: 13px;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }

/* Comments */
.comments-section { margin-top: 32px; }
.comment-form { margin-bottom: 24px; }
.comment-form .btn { margin-top: 10px; }

.comment {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius);
    padding: 18px 20px;
    margin-bottom: 10px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    transition: border-color 0.2s;
}
.comment:hover { border-color: var(--border-hover); }
.comment-header { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.comment-avatar {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    color: #fff;
    flex-shrink: 0;
}
.comment-author { font-weight: 600; font-size: 14px; color: var(--text); }
.comment-time { font-size: 12px; color: var(--text-muted); }
.comment-content { font-size: 14px; line-height: 1.6; color: var(--text-secondary); }

/* Forms */
.post-form {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    max-width: 800px;
}

.form-group { margin-bottom: 20px; }
.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s;
    background-color: rgba(17, 24, 39, 0.6);
    background-image: none;
    color: var(--text);
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
    background-color: rgba(17, 24, 39, 0.8);
}
.form-group textarea { resize: vertical; }
.form-footer { text-align: center; margin-top: 16px; font-size: 14px; color: var(--text-muted); }

/* Unified Inputs */
.input, .input-field,
input[type="text"].input, input[type="email"].input, input[type="password"].input,
input[type="url"].input, input[type="number"].input, input[type="search"].input,
textarea.input, select.input {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border) !important;
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    transition: all 0.3s;
    background-color: rgba(17, 24, 39, 0.6) !important;
    background-image: none !important;
    color: var(--text) !important;
    -webkit-appearance: none !important;
    -moz-appearance: none !important;
    appearance: none !important;
    box-shadow: none !important;
}
.input:focus, .input-field:focus,
input[type="text"].input:focus, input[type="email"].input:focus, input[type="password"].input:focus,
input[type="url"].input:focus, input[type="number"].input:focus, input[type="search"].input:focus,
textarea.input:focus, select.input:focus {
    outline: none;
    border-color: var(--primary) !important;
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.15) !important;
    background-color: rgba(17, 24, 39, 0.8) !important;
}
textarea.input { resize: vertical; min-height: 60px; }
select.input { cursor: pointer; }
select.input option { background: #111827; color: var(--text); }

.input-warning {
    padding: 12px 14px;
    background: rgba(255, 170, 0, 0.08);
    border-radius: var(--radius);
    border: 1px solid rgba(255, 170, 0, 0.2);
}
.input-warning .input-label {
    color: var(--warning);
}
.input-warning .input {
    border-color: rgba(255, 170, 0, 0.3);
}
.input-warning .input:focus {
    border-color: var(--warning);
    box-shadow: 0 0 16px rgba(255, 170, 0, 0.15);
}

.input-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group { margin-bottom: 16px; }

.modal-title {
    margin-bottom: 20px;
    text-align: center;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.modal-section { margin-bottom: 20px; padding-bottom: 16px; border-bottom: 1px solid var(--border); }
.modal-section:last-child { border-bottom: none; }
.modal-section-title { font-size: 15px; font-weight: 600; margin-bottom: 12px; color: var(--text); }

/* Modal */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 200;
    align-items: center;
    justify-content: center;
}
.modal-overlay.open { display: flex; }
.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    width: 420px;
    max-width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.modal h2 { margin-bottom: 20px; text-align: center; font-weight: 700; }
.modal-close {
    position: absolute;
    top: 12px;
    right: 16px;
    background: none;
    border: none;
    font-size: 20px;
    cursor: pointer;
    color: var(--text-muted);
    transition: color 0.2s;
}
.modal-close:hover { color: var(--primary); }

/* Profile */
.profile-header {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border-radius: var(--radius-lg);
    padding: 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    display: flex;
    gap: 28px;
    align-items: flex-start;
    margin-bottom: 32px;
}
.profile-avatar {
    width: 80px;
    height: 80px;
    border-radius: 16px;
    background: var(--gradient-primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 700;
    flex-shrink: 0;
    box-shadow: 0 0 24px var(--primary-glow);
}
.profile-info h2 { font-size: 24px; margin-bottom: 4px; font-weight: 700; }
.profile-meta { color: var(--text-muted); font-size: 14px; margin-bottom: 8px; }
.profile-bio { color: var(--text-secondary); font-size: 14px; }

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--bg-secondary);
    color: #fff;
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 300;
    pointer-events: none;
    border: 1px solid var(--border);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}
.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.toast.success {
    background: rgba(0, 255, 136, 0.15);
    border-color: var(--success);
    color: var(--success);
}
.toast.error {
    background: rgba(255, 68, 102, 0.15);
    border-color: var(--error);
    color: var(--error);
}

/* Empty state */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
}
.empty-state .empty-icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; }

/* Site Footer */
.site-footer {
    background: rgba(10, 14, 26, 0.95);
    color: var(--text-secondary);
    margin-top: 40px;
    padding: 48px 0 0;
    border-top: 1px solid var(--border);
    position: relative;
    z-index: 1;
}
.footer-inner {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    padding-bottom: 36px;
    border-bottom: 1px solid var(--border);
}
.footer-col h4 {
    color: var(--text);
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.footer-col p {
    font-size: 13px;
    line-height: 1.8;
    color: var(--text-muted);
}
.footer-col a {
    display: block;
    font-size: 13px;
    color: var(--text-muted);
    padding: 3px 0;
    transition: all 0.2s;
}
.footer-col a:hover { color: var(--primary); text-shadow: 0 0 8px var(--primary-glow); }
.footer-bottom {
    text-align: center;
    padding: 20px 0;
    font-size: 12px;
    color: var(--text-muted);
}
.footer-bottom a { color: var(--primary); }

@media (max-width: 768px) {
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 24px; }
    .site-footer { padding: 36px 0 0; }
}
@media (max-width: 480px) {
    .footer-inner { grid-template-columns: 1fr; gap: 20px; text-align: center; }
}

/* Pagination */
.pagination {
    display: flex;
    gap: 6px;
    justify-content: center;
    margin-top: 24px;
    flex-wrap: wrap;
}
.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 12px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.25s;
}
.pagination a:hover {
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: 0 0 12px rgba(0, 212, 255, 0.15);
}
.pagination .active {
    background: var(--gradient-primary);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 0 16px rgba(0, 212, 255, 0.3);
}
.pagination .dots {
    border: none;
    background: transparent;
    color: var(--text-muted);
    min-width: auto;
}

/* Post detail content HTML rendering */
.post-detail-content h3 {
    font-size: 20px;
    font-weight: 700;
    margin: 24px 0 12px;
    color: var(--text);
}
.post-detail-content p {
    margin-bottom: 12px;
}
.post-detail-content ul,
.post-detail-content ol {
    margin: 12px 0;
    padding-left: 24px;
}
.post-detail-content li {
    margin-bottom: 6px;
}
.post-detail-content code {
    background: rgba(0, 212, 255, 0.1);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--primary);
    font-family: "SF Mono", "Fira Code", monospace;
}

/* Scrollbar */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* Selection */
::selection { background: rgba(0, 212, 255, 0.3); color: #fff; }

/* Responsive - Mobile First Approach */
@media (max-width: 1024px) {
    .container { padding: 0 16px; }
    .hero { padding: 60px 0; }
    .hero h1 { font-size: 36px; }
    .categories-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); }
}

@media (max-width: 768px) {
    .nav { display: none; }
    .mobile-menu-btn { display: block; }
    .header-inner { gap: 0; justify-content: space-between; }
    .header-right .btn { padding: 5px 10px; font-size: 12px; }
    .header-right { gap: 6px; }
    .user-info { gap: 6px; font-size: 13px; }
    .user-info a { display: none; }
    .user-info a[href="logout.php"],
    .user-info a[href*="profile.php"] { display: inline-block; }

    .hero { padding: 50px 0; }
    .hero h1 { font-size: 28px; }
    .hero p { font-size: 15px; padding: 0 16px; }

    .stats-grid { grid-template-columns: repeat(2, 1fr); margin-top: -30px; gap: 12px; }
    .stat-number { font-size: 24px; }
    .stat-card { padding: 20px 16px; }

    .section { margin-top: 28px; }
    .section-title { font-size: 18px; margin-bottom: 16px; }

    .categories-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
    .category-card { padding: 12px 10px; }
    .category-icon { font-size: 18px; margin-bottom: 4px; }
    .category-name { font-size: 13px; }
    .category-desc { font-size: 10px; }

    .post-card { padding: 16px; }
    .post-card-title { font-size: 15px; }
    .post-card-meta { gap: 10px; font-size: 12px; }
    .post-card-tags { gap: 4px; }

    .post-detail { padding: 20px 16px; border-radius: var(--radius); }
    .post-detail h1 { font-size: 22px; }
    .post-detail-meta { gap: 12px; font-size: 13px; }
    .post-detail-content { font-size: 15px; }

    .breadcrumb { font-size: 12px; margin-bottom: 12px; }

    .comment { padding: 14px 16px; }

    .profile-header { flex-direction: column; align-items: center; text-align: center; padding: 24px 16px; }
    .profile-avatar { width: 64px; height: 64px; font-size: 26px; border-radius: 14px; }
    .profile-info h2 { font-size: 20px; }

    .post-form { padding: 20px 16px; border-radius: var(--radius); max-width: 100%; }
    .form-group input, .form-group textarea, .form-group select, .input, .input-field { padding: 12px 14px; font-size: 16px; }

    .btn-lg { padding: 12px 24px; font-size: 15px; }

    .modal { padding: 24px 20px; width: 95vw; }
    .modal h2 { font-size: 20px; }

    .pagination { gap: 4px; }
    .pagination a, .pagination span { min-width: 32px; height: 32px; font-size: 13px; padding: 0 8px; }

    .toast { left: 16px; right: 16px; transform: translateY(100px); text-align: center; font-size: 13px; }
    .toast.show { transform: translateY(0); }
}

@media (max-width: 480px) {
    .container { padding: 0 12px; }
    .hero { padding: 40px 0; }
    .hero h1 { font-size: 24px; }
    .hero p { font-size: 14px; }
    .hero-actions { flex-direction: column; align-items: center; gap: 10px; }
    .hero-actions .btn { width: 100%; max-width: 280px; }

    .stats-grid { gap: 8px; }
    .stat-card { padding: 16px 12px; }
    .stat-number { font-size: 20px; }
    .stat-label { font-size: 11px; }

    .categories-grid { grid-template-columns: 1fr 1fr; gap: 6px; }
    .category-card { padding: 10px 8px; }
    .category-desc { font-size: 10px; -webkit-line-clamp: 1; }

    .post-card { padding: 14px 12px; }
    .post-card-header { flex-direction: column; gap: 4px; }

    .post-detail { padding: 16px 14px; }
    .post-detail h1 { font-size: 20px; }
    .post-detail-meta { flex-direction: column; gap: 6px; }
    .post-detail-content { font-size: 14px; }
    .post-detail-content h3 { font-size: 17px; }

    .comment { padding: 12px; }
    .comment-form .input { padding: 12px; font-size: 15px; }

    .profile-header { padding: 20px 14px; }

    .form-group label { font-size: 12px; }
}