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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    color: #333;
}

.container {
    background: white;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    max-width: 800px;
    width: 100%;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h1 {
    text-align: center;
    color: #667eea;
    margin-bottom: 30px;
    font-size: 2.5rem;
    font-weight: 600;
}

h2 {
    color: #667eea;
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 600;
}

.settings {
    background: #f7f9fc;
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-group label {
    font-size: 0.875rem;
    font-weight: 500;
    color: #555;
}

.setting-group input {
    padding: 10px 12px;
    border: 2px solid #e0e6ed;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: white;
}

.setting-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.converter {
    background: #f7f9fc;
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
}

.input-group {
    margin-bottom: 25px;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e6ed;
    border-radius: 8px;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    background: white;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.unit-selectors {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 25px;
}

.unit-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #555;
}

.unit-group select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e6ed;
    border-radius: 8px;
    font-size: 1rem;
    background: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.unit-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.result {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    color: white;
}

.result-label {
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 10px;
    opacity: 0.9;
}

.result-value {
    font-size: 2.5rem;
    font-weight: 700;
    word-break: break-all;
}

.conversion-table {
    background: #f7f9fc;
    border-radius: 12px;
    padding: 30px;
}

.table-content {
    display: grid;
    gap: 12px;
}

.conversion-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background: white;
    border-radius: 8px;
    border-left: 4px solid #667eea;
    transition: all 0.3s ease;
}

.conversion-row:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.2);
}

.conversion-row .unit-name {
    font-weight: 600;
    color: #667eea;
    font-size: 1.1rem;
}

.conversion-row .unit-value {
    font-size: 1.1rem;
    color: #333;
    font-weight: 500;
}

@media (max-width: 768px) {
    .container {
        padding: 25px;
    }

    h1 {
        font-size: 2rem;
    }

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

    .unit-selectors {
        grid-template-columns: 1fr;
    }

    .result-value {
        font-size: 2rem;
    }
}