:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #e2e8f0;
}

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

body {
    background-color: var(--bg-color);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-color);
    padding: 1rem;
}

.container {
    background-color: var(--card-bg);
    border-radius: 12px;
    padding: 2rem;
    width: 100%;
    max-width: 600px;
    box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
}

h1 {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 1.875rem;
    color: #fff;
}

.input-group {
    margin-bottom: 1.5rem;
}

textarea {
    width: 100%;
    min-height: 200px;
    padding: 1rem;
    background-color: #334155;
    border: 1px solid #475569;
    border-radius: 8px;
    color: var(--text-color);
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.875rem;
    line-height: 1.5;
    resize: vertical;
    transition: border-color 0.2s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.3);
}

.button-group {
    display: flex;
    gap: 1rem;
}

button {
    flex: 1;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.parse-btn {
    background-color: var(--primary-color);
    color: white;
}

.parse-btn:hover {
    background-color: var(--primary-hover);
}

.clear-btn {
    background-color: #475569;
    color: white;
}

.clear-btn:hover {
    background-color: #334155;
}

.error {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 6px;
    background-color: #991b1b;
    color: #fecaca;
    display: none;
}

@media (max-width: 640px) {
    .container {
        padding: 1.5rem;
    }

    .button-group {
        flex-direction: column;
    }
}