:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-color: #e2e8f0;
    --accent-color: #10b981;
    --accent-hover: #059669;
    --border-color: #334155;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

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

header h1 {
    margin-bottom: 0.5rem;
    color: #fff;
}

header code {
    background-color: var(--card-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 4px;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-hint {
    font-size: 0.85rem;
    color: #94a3b8;
    margin-bottom: 0.5rem;
}

textarea {
    width: 100%;
    box-sizing: border-box;
    background-color: var(--bg-color);
    color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.75rem;
    font-family: monospace;
    font-size: 1rem;
    resize: vertical;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
    margin-bottom: 1.5rem;
}

.settings-grid label {
    display: block;
    font-size: 0.85rem;
    margin-bottom: 0.25rem;
    color: #94a3b8;
}

.settings-grid input, .settings-grid select {
    width: 100%;
    box-sizing: border-box;
    background-color: var(--bg-color);
    color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.5rem;
}

button {
    width: 100%;
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 0.75rem;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
}

button:hover:not(:disabled) {
    background-color: var(--accent-hover);
}

button:disabled {
    background-color: #475569;
    cursor: not-allowed;
    opacity: 0.6;
}

.progress-bar-container {
    width: 100%;
    background-color: #e0e0e0;
    border-radius: 4px;
    height: 8px;
    overflow: hidden;
    margin-top: 8px;
}

.progress-bar {
    width: 0%;
    height: 100%;
    background-color: #317f3f;
    transition: width 0.15s ease-out; /* Smooth transition movement */
}

.output-card {
    border-left: 4px solid var(--accent-color);
}

pre {
    background-color: var(--bg-color);
    padding: 1rem;
    border-radius: 6px;
    overflow-x: auto;
    font-family: monospace;
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
}