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

body {
    font-family: 'Arial', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    overflow: hidden;
}

h1 {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    text-align: center;
    padding: 30px;
    margin: 0;
    font-size: 2.2em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.converter-section {
    padding: 30px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.input-section label {
    font-weight: bold;
    color: #333;
    margin-bottom: 5px;
}

.input-section input,
.input-section select {
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.input-section input:focus,
.input-section select:focus {
    outline: none;
    border-color: #4facfe;
    box-shadow: 0 0 0 3px rgba(79, 172, 254, 0.1);
}

button {
    padding: 12px 20px;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(79, 172, 254, 0.4);
}

button:active {
    transform: translateY(0);
}

.results-section h3 {
    color: #333;
    margin-bottom: 20px;
    font-size: 1.5em;
}

.result-item {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.result-item label {
    min-width: 140px;
    font-weight: bold;
    color: #555;
}

.result-item input {
    flex: 1;
    padding: 10px;
    border: 2px solid #eee;
    border-radius: 6px;
    background: #f9f9f9;
    font-family: 'Courier New', monospace;
    font-size: 14px;
}

.result-item button {
    padding: 8px 15px;
    font-size: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.info-section,
.examples-section {
    padding: 20px 30px;
    background: #f8f9fa;
    border-top: 1px solid #eee;
}

.info-section h3,
.examples-section h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 1.3em;
}

.info-section ul {
    list-style: none;
    padding-left: 0;
}

.info-section li {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

.info-section li:last-child {
    border-bottom: none;
}

.info-section strong {
    color: #4facfe;
    min-width: 100px;
    display: inline-block;
}

.example-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.example-buttons button {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    color: #333;
    font-size: 14px;
    padding: 10px 15px;
}

.example-buttons button:hover {
    box-shadow: 0 5px 15px rgba(252, 182, 159, 0.4);
}

.error {
    border-color: #ff6b6b !important;
    background-color: #ffe0e0 !important;
}

.success {
    border-color: #51cf66 !important;
    background-color: #e0ffe0 !important;
}

@media (max-width: 768px) {
    .converter-section {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .result-item {
        flex-direction: column;
        align-items: stretch;
    }
    
    .result-item label {
        min-width: auto;
        margin-bottom: 5px;
    }
    
    .example-buttons {
        justify-content: center;
    }
    
    h1 {
        font-size: 1.8em;
        padding: 20px;
    }
}