/* Body */
body {
    background: linear-gradient(135deg, #f5f7fa, #c3cfe2);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

/* Card */
.card {
    background-color: #ffffff;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

/* Headings */
.card h2 {
    font-weight: 700;
    color: #1e293b; /* dark gray-blue */
}

/* Inputs */
.card input.form-control {
    border-radius: 0.5rem;
    border: 1px solid #cbd5e1;
    padding: 0.625rem 0.75rem;
    transition: all 0.2s ease-in-out;
}

.card input.form-control:focus {
    border-color: #3b82f6; /* blue-500 */
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

/* Buttons */
.card button.btn {
    border-radius: 0.5rem;
    padding: 0.625rem 1rem;
    font-weight: 600;
    transition: all 0.3s ease;
}

.card button.btn-primary {
    background-color: #3b82f6;
    border-color: #3b82f6;
}

.card button.btn-primary:hover {
    background-color: #2563eb;
    border-color: #2563eb;
}

.card button.btn-success {
    background-color: #10b981;
    border-color: #10b981;
}

.card button.btn-success:hover {
    background-color: #059669;
    border-color: #059669;
}

/* Links */
.card a {
    color: #3b82f6;
    text-decoration: none;
}

.card a:hover {
    text-decoration: underline;
}

/* Alerts */
.alert {
    border-radius: 0.5rem;
    padding: 0.75rem 1rem;
}

/* Checkbox */
.card input[type="checkbox"] {
    width: 16px;
    height: 16px;
}