:root {
    --primary-color: #4e73df;
    --secondary-color: #858796;
    --success-color: #1cc88a;
    --info-color: #36b9cc;
    --warning-color: #f6c23e;
    --danger-color: #e74a3b;
    --bg-light: #f8f9fc;
}

body {
    background-color: var(--bg-light);
    font-family: 'Prompt', 'Sarabun', sans-serif;
    color: #5a5c69;
}

.navbar-custom {
    background: linear-gradient(135deg, #4e73df 0%, #224abe 100%);
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

.card {
    border: none;
    border-radius: 1rem;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.05);
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 1rem 2rem rgba(0, 0, 0, 0.1);
}

.card-header {
    background-color: #fff;
    border-bottom: 1px solid #e3e6f0;
    font-weight: 600;
    color: var(--primary-color);
    border-radius: 1rem 1rem 0 0 !important;
    padding: 1rem 1.5rem;
}

.form-floating > label {
    font-weight: 300;
}

.btn-primary-custom {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    border-radius: 50px;
    padding: 0.5rem 1.5rem;
}

.btn-primary-custom:hover {
    background-color: #224abe;
    color: white;
}

.login-container {
    min-height: 100vh;
    background: linear-gradient(135deg, #4e73df 10%, #224abe 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.img-preview {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 10px;
    margin: 5px;
    border: 2px solid #e3e6f0;
}