body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    padding: 20px;
}
.container {
    max-width: 650px;
    margin: 0 auto;
    background: #fff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}
h2 { text-align: center; color: #2c3e50; margin-bottom: 20px; }

.section-title {
    font-weight: bold;
    background: #34495e;
    color: white;
    padding: 8px 12px;
    border-radius: 4px;
    margin-top: 25px;
    margin-bottom: 15px;
}

/* Сітка для елементів форми */
.form-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

/* Елементи на 100% ширини */
.full-width {
    grid-column: span 2;
}

.form-group {
    display: flex;
    flex-direction: column;
}

label {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 5px;
    color: #2c3e50;
}

.help-text {
    font-size: 11px;
    color: #7f8c8d;
    font-weight: normal;
    display: block;
    margin-top: 2px;
}

input, select {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 14px;
    text-align: center;
    background-color: #fff;
}

input:focus, select:focus {
    border-color: #e67e22;
    outline: none;
}

button {
    width: 100%;
    padding: 14px;
    background-color: #e67e22;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    margin-top: 25px;
    transition: background 0.2s;
}
button:hover { background-color: #d35400; }

/* Блок результатів */
.results {
    margin-top: 25px;
    padding: 20px;
    background: #2ecc71;
    color: white;
    border-radius: 6px;
    display: none;
}
.res-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}
.res-box {
    background: rgba(0, 0, 0, 0.1);
    padding: 12px;
    border-radius: 4px;
    text-align: center;
}
.res-box h4 { margin: 0 0 8px 0; font-size: 14px; text-transform: uppercase; letter-spacing: 0.5px;}
.res-val { font-weight: bold; font-size: 20px; display: block; }
.res-rec { font-weight: bold; font-size: 16px; color: #f1c40f; display: block; margin-top: 5px;}