* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}
body {
    background: #f1f5f9;
    color: #1e293b;
}
.admin-wrapper {
    display: flex;
    min-height: 100vh;
}
.admin-sidebar {
    width: 260px;
    background: #0f172a;
    color: #fff;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 1.5rem;
}
.admin-sidebar h2 {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #38bdf8;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.admin-sidebar ul {
    list-style: none;
    flex: 1;
}
.admin-sidebar ul li {
    margin-bottom: 0.5rem;
}
.admin-sidebar ul li a {
    color: #94a3b8;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    transition: all 0.2s;
}
.admin-sidebar ul li.active a, .admin-sidebar ul li a:hover {
    background: #1e293b;
    color: #fff;
}
.sidebar-footer {
    border-top: 1px solid #1e293b;
    padding-top: 1rem;
}
.sidebar-footer a {
    color: #38bdf8;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.admin-content {
    flex: 1;
    padding: 2.5rem;
    overflow-y: auto;
}
.admin-topbar h1 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #0f172a;
}
.alert-success {
    background: #dcfce7;
    color: #166534;
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}
.admin-form {
    background: #fff;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.form-group {
    margin-bottom: 1.5rem;
}
.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #334155;
}
.form-group input[type="text"], .form-group textarea, .form-group select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid #cbd5e1;
    border-radius: 6px;
    font-size: 1rem;
}
.form-group input[type="file"] {
    display: block;
    margin-top: 0.5rem;
}
.current-file-text {
    margin-top: 0.5rem;
    font-size: 0.85rem;
    color: #64748b;
}
.btn-save {
    background: #0284c7;
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}
.btn-save:hover {
    background: #0369a1;
}

@media (max-width: 768px) {
    .admin-wrapper { flex-direction: column; }
    .admin-sidebar { width: 100%; }
}