/*
 * 清新蓝 (Classic) — 简洁专业，浅色背景，蓝色系
 * Scope: body.pf-theme-classic
 */
body.pf-theme-classic {
    background: linear-gradient(135deg, #e0f2fe 0%, #f0f9ff 50%, #eff6ff 100%);
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body.pf-theme-classic .card {
    background: #ffffff;
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 24px rgba(59, 130, 246, 0.08), 0 1px 3px rgba(0, 0, 0, 0.04);
}

body.pf-theme-classic .card-header {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    color: #ffffff;
    border-radius: 16px 16px 0 0 !important;
    border: none;
    padding: 1.25rem 1.5rem;
}

body.pf-theme-classic .card-header h4,
body.pf-theme-classic .card-header h5 {
    color: #ffffff;
    margin: 0;
}

body.pf-theme-classic .card-body {
    padding: 1.5rem;
}

body.pf-theme-classic .form-label {
    font-weight: 600;
    color: #1e40af;
    font-size: 0.9rem;
}

body.pf-theme-classic .form-control,
body.pf-theme-classic .form-select {
    border: 1.5px solid #bfdbfe;
    border-radius: 10px;
    padding: 0.6rem 0.85rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background-color: #f8fafc;
}

body.pf-theme-classic .form-control:focus,
body.pf-theme-classic .form-select:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    background-color: #ffffff;
}

body.pf-theme-classic .btn-primary {
    background: linear-gradient(135deg, #3b82f6, #2563eb);
    border: none;
    border-radius: 10px;
    padding: 0.65rem 2rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
    transition: transform 0.15s, box-shadow 0.15s;
}

body.pf-theme-classic .btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
}

body.pf-theme-classic .form-check-input:checked {
    background-color: #3b82f6;
    border-color: #3b82f6;
}

body.pf-theme-classic .text-danger {
    color: #dc2626 !important;
}

body.pf-theme-classic footer {
    color: #64748b;
}