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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    width: 100%;
    max-width: 600px;
}

.card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    padding: 40px;
    animation: slideIn 0.3s ease-out;
}

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

h1 {
    color: #333;
    margin-bottom: 30px;
    text-align: center;
    font-size: 28px;
}

.input-section,
.output-section {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 10px;
    color: #555;
    font-weight: 600;
    font-size: 14px;
}

textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
    transition: border-color 0.3s;
}

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

.layout-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 25px;
}

.btn {
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    background: #667eea;
    color: white;
}

.btn:hover {
    background: #5568d3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.3);
}

.btn:active {
    transform: translateY(0);
}

.btn-copy {
    background: #48bb78;
    grid-column: 1;
}

.btn-copy:hover {
    background: #38a169;
}

.btn-reset {
    background: #f56565;
    grid-column: 2;
}

.btn-reset:hover {
    background: #e53e3e;
}

.output-box {
    background: #f7fafc;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    padding: 20px;
    min-height: 150px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    color: #2d3748;
    white-space: pre-wrap;
    word-break: break-word;
    line-height: 1.8;
}

.output-box:empty::before {
    content: 'Your formatted output will appear here...';
    color: #cbd5e0;
}

.action-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-top: 20px;
}

@media (max-width: 500px) {
    .card {
        padding: 25px;
    }

    h1 {
        font-size: 24px;
        margin-bottom: 20px;
    }

    .layout-buttons {
        grid-template-columns: 1fr;
    }

    .btn-copy,
    .btn-reset {
        grid-column: auto;
    }
}