* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1e1e1e 0%, #2d2d2d 100%);
    color: #ffffff;
    min-height: 100vh;
    padding: 40px 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.5em;
    color: #ffd700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.selection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.selection-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 30px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 215, 0, 0.2);
}

.selection-card h2 {
    color: #ffd700;
    margin-bottom: 20px;
    font-size: 1.5em;
    font-style: italic;
}

.selection-card select {
    width: 100%;
    padding: 15px;
    font-size: 1.1em;
    background: #ffd700;
    color: #1e1e1e;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    font-weight: bold;
}

.selection-card select:focus {
    outline: 3px solid rgba(255, 215, 0, 0.5);
}

.info-line {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid rgba(255, 215, 0, 0.3);
    font-size: 0.9em;
    color: #ffd700;
}

.results {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 40px;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 215, 0, 0.3);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 30px;
}

.result-item {
    text-align: center;
    padding: 20px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
}

.result-label {
    color: #ffd700;
    font-size: 0.9em;
    margin-bottom: 10px;
    font-style: italic;
}

.result-value {
    font-size: 2em;
    font-weight: bold;
    color: #ffffff;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.result-unit {
    font-size: 0.6em;
    color: #ffd700;
}
@media (max-width: 768px) {
    h1 {
        font-size: 1.8em;
    }

    .selection-grid {
        grid-template-columns: 1fr;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }
}