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

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: white;
    padding: 30px 20px;
    text-align: center;
}

h1 {
    font-size: 2.2rem;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 1.1rem;
    opacity: 0.9;
}

.content {
    padding: 30px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #444;
}

input, select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    transition: border 0.3s;
}

input:focus, select:focus {
    border-color: #6a11cb;
    outline: none;
    box-shadow: 0 0 0 2px rgba(106, 17, 203, 0.2);
}

.form-row {
    display: flex;
    gap: 20px;
}

.form-col {
    flex: 1;
}

button {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
    color: white;
    border: none;
    padding: 14px 20px;
    font-size: 16px;
    border-radius: 5px;
    cursor: pointer;
    width: 100%;
    font-weight: 600;
    transition: transform 0.2s, box-shadow 0.2s;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(106, 17, 203, 0.4);
}

button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.result-container {
    margin-top: 30px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
    border-left: 4px solid #6a11cb;
    display: none;
}

.result-title {
    font-weight: 600;
    margin-bottom: 10px;
    color: #444;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: #6a11cb;
}

.calculation-details {
    margin-top: 15px;
    padding: 15px;
    background-color: #eef2f7;
    border-radius: 5px;
    font-size: 14px;
}

.detail-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid #dde1e6;
}

.detail-row:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.detail-label {
    color: #666;
}

.detail-value {
    font-weight: 600;
}

.info-box {
    background-color: #e8f4fd;
    border-left: 4px solid #2196F3;
    padding: 15px;
    margin-top: 20px;
    border-radius: 5px;
}

.info-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: #0d47a1;
}

footer {
    text-align: center;
    padding: 20px;
    color: #777;
    font-size: 0.9rem;
    border-top: 1px solid #eee;
    margin-top: 20px;
}

@media (max-width: 600px) {
    .form-row {
        flex-direction: column;
        gap: 0;
    }

    .content {
        padding: 20px;
    }
}