:root {
    --bg: #0f172a;
    --surface: #1e293b;
    --surface2: #334155;
    --text: #f1f5f9;
    --text-sec: #94a3b8;
    --text-muted: #64748b;
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --border: #334155;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --radius: 12px;
    --radius-sm: 8px;
    --font: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
}

/* Login */
.admin-login {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 1rem;
}
.login-box {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 2.5rem;
    max-width: 400px;
    width: 100%;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.login-icon {
    font-size: 2.5rem;
    color: var(--primary);
    margin-bottom: 1rem;
    background: rgba(59,130,246,0.12);
    padding: 1rem;
    border-radius: 50%;
}
.login-box h2 { margin-bottom: 0.5rem; }
.login-box p { color: var(--text-sec); font-size: 0.9rem; margin-bottom: 1.5rem; }
.login-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    font-size: 1rem;
    font-family: var(--font);
    margin-bottom: 0.75rem;
}
.login-input:focus { outline: none; border-color: var(--primary); }
.login-error { color: var(--danger); font-size: 0.85rem; margin-bottom: 0.75rem; min-height: 1.25rem; }
.login-btn {
    width: 100%;
    padding: 0.75rem;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--primary);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    margin-bottom: 1rem;
    transition: background 0.2s;
}
.login-btn:hover { background: var(--primary-dark); }
.login-back {
    display: block;
    color: var(--text-sec);
    text-decoration: none;
    font-size: 0.85rem;
}
.login-back:hover { color: var(--primary); }

/* Admin Panel */
.admin-panel { min-height: 100vh; }
.admin-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.admin-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0.875rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.admin-logo {
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.admin-logo i { color: var(--primary); }
.admin-header-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}
.admin-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.85rem;
    color: var(--success);
}
.admin-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    border: 1px solid var(--border);
    text-decoration: none;
    transition: all 0.2s;
}
.admin-btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.admin-btn.primary:hover { background: var(--primary-dark); }
.admin-btn.secondary { background: var(--surface2); color: var(--text); }
.admin-btn.secondary:hover { background: var(--border); }
.admin-btn.danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.admin-btn.danger:hover { opacity: 0.85; }
.admin-btn.small { padding: 0.35rem 0.65rem; font-size: 0.8rem; }

/* Nav */
.admin-nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    gap: 0;
    padding: 0 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    overflow-x: auto;
}
.admin-nav-item {
    padding: 0.75rem 1.25rem;
    background: none;
    border: none;
    color: var(--text-sec);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font);
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s;
}
.admin-nav-item:hover { color: var(--text); }
.admin-nav-item.active { color: var(--primary); border-bottom-color: var(--primary); }

/* Content */
.admin-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1.5rem;
}
.admin-tab { display: none; }
.admin-tab.active { display: block; }
.tab-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}
.tab-header h2 { font-size: 1.3rem; }

/* Dashboard */
.dashboard-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}
.stat-card {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    text-align: center;
    border: 1px solid var(--border);
}
.stat-card i { font-size: 2rem; color: var(--primary); margin-bottom: 0.75rem; display: block; }
.stat-number { display: block; font-size: 2rem; font-weight: 800; }
.stat-label { color: var(--text-sec); font-size: 0.85rem; }

/* Form */
.admin-form {
    background: var(--surface);
    border-radius: var(--radius);
    padding: 1.5rem;
    border: 1px solid var(--border);
    margin-bottom: 1.5rem;
}
.admin-form h3 { margin-bottom: 1rem; }
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}
.form-group { margin-bottom: 1rem; }
.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
    color: var(--text-sec);
}
.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.6rem 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg);
    color: var(--text);
    font-size: 0.9rem;
    font-family: var(--font);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}
.form-group textarea { resize: vertical; }
.form-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* Table */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}
.admin-table th {
    background: var(--surface2);
    padding: 0.75rem 1rem;
    text-align: left;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-sec);
    font-weight: 600;
}
.admin-table td {
    padding: 0.75rem 1rem;
    border-top: 1px solid var(--border);
    font-size: 0.9rem;
}
.admin-table tr:hover td { background: var(--surface2); }
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    border-radius: 99px;
    font-size: 0.75rem;
    font-weight: 600;
}
.status-badge.active { background: rgba(16,185,129,0.15); color: var(--success); }
.status-badge.inactive { background: rgba(239,68,68,0.15); color: var(--danger); }
.status-badge.published { background: rgba(16,185,129,0.15); color: var(--success); }
.status-badge.draft { background: rgba(245,158,11,0.15); color: var(--warning); }
.action-cell { display: flex; gap: 0.4rem; }

@media (max-width: 768px) {
    .admin-header-inner { flex-direction: column; align-items: stretch; text-align: center; padding: 0.6rem 1rem; }
    .admin-header-right { justify-content: center; flex-wrap: wrap; }
    .admin-badge { font-size: 0.8rem; }
    .admin-nav { padding: 0 0.5rem; overflow-x: auto; -webkit-overflow-scrolling: touch; gap: 0; }
    .admin-nav-item { padding: 0.6rem 0.8rem; font-size: 0.8rem; flex-shrink: 0; }
    .admin-content { padding: 0.75rem; }
    .tab-header { flex-direction: column; align-items: stretch; text-align: center; }
    .tab-header h2 { font-size: 1.1rem; }
    .admin-btn { font-size: 0.8rem; padding: 0.4rem 0.75rem; min-height: 40px; }
    .admin-form { padding: 1rem; }
    .form-grid { grid-template-columns: 1fr; }
    .form-group { margin-bottom: 0.75rem; }
    .form-group input, .form-group select, .form-group textarea { font-size: 16px; padding: 0.65rem 0.75rem; }
    .admin-table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; white-space: nowrap; font-size: 0.8rem; }
    .admin-table th, .admin-table td { padding: 0.5rem 0.6rem; }
    .action-cell { flex-wrap: wrap; }
    .dashboard-stats { grid-template-columns: repeat(2, 1fr); gap: 0.6rem; }
    .stat-card { padding: 1rem; }
    .stat-card i { font-size: 1.5rem; }
    .stat-number { font-size: 1.5rem; }
    .login-box { padding: 1.5rem; margin: 1rem; }
}

@media (max-width: 480px) {
    .admin-header-inner { padding: 0.5rem 0.75rem; }
    .admin-nav-item { font-size: 0.75rem; padding: 0.5rem 0.6rem; }
    .admin-content { padding: 0.5rem; }
    .dashboard-stats { grid-template-columns: 1fr; }
    .admin-form { padding: 0.75rem; border-radius: 10px; }
    .tab-header h2 { font-size: 1rem; }
    .form-group input, .form-group select, .form-group textarea { font-size: 16px; }
    .login-box { padding: 1.25rem; }
    .login-box h2 { font-size: 1.1rem; }
}