:root {
    --primary-color: #3b82f6;
    --primary-hover: #2563eb;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    background-color: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 800px;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 1.875rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

header p {
    color: var(--text-muted);
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

textarea {
    width: 100%;
    min-height: 300px;
    padding: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875rem;
    resize: vertical;
    transition: border-color 0.2s, box-shadow 0.2s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

button {
    flex: 1;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid var(--border-color);
    background-color: #fff;
    color: var(--text-color);
}

button:hover {
    background-color: #f1f5f9;
}

button.primary {
    background-color: var(--primary-color);
    color: #fff;
    border-color: var(--primary-color);
}

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

button:active {
    transform: scale(0.98);
}

.status {
    height: 1.5rem;
    font-size: 0.875rem;
    text-align: center;
    color: var(--primary-color);
    font-weight: 500;
}

footer {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

@media (max-width: 640px) {
    .actions {
        flex-direction: column;
    }
}