:root {
    --primary-color: #0056b3;
    --bg-color: #f4f7f6;
    --card-bg: #ffffff;
    --text-color: #333;
    --border-color: #ddd;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 15px;
}

.container {
    max-width: 600px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 20px;
    padding: 15px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.header h2 { font-size: 1.2rem; margin-bottom: 5px; }
.header p { font-size: 1rem; margin-bottom: 5px; opacity: 0.9; }
.header h3 { font-size: 1.1rem; font-weight: 500; }

.card {
    background-color: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

.card h4 {
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.form-group {
    margin-bottom: 15px;
}

.row {
    display: flex;
    gap: 15px;
}

.col {
    flex: 1;
}

label {
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 0.9rem;
    color: #555;
}

.highlight-label {
    color: #d9534f;
    font-size: 1rem;
}

input[type="text"],
input[type="date"],
input[type="time"],
input[type="number"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(0, 86, 179, 0.2);
}

.readonly-group input {
    background-color: #e9ecef;
    color: #495057;
    border: 1px dashed #ccc;
    cursor: not-allowed;
}

.submit-btn {
    width: 100%;
    padding: 15px;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background-color: #218838;
}

/* Mobile specific tweaks */
@media (max-width: 480px) {
    .row {
        flex-direction: column;
        gap: 0;
    }
    .card {
        padding: 15px;
    }
}