:root {
    --bg-color: #0d1117;
    --text-color: #c9d1d9;
    --border-color: #30363d;
    --input-bg: #010409;
    --btn-bg: #238636;
    --btn-hover: #2ea043;
    --btn-copy-bg: #21262d;
    --btn-copy-hover: #30363d;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    line-height: 1.5;
    margin: 0;
    padding: 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
}

h1, h2 { border-bottom: 1px solid var(--border-color); padding-bottom: 0.3em; }
.note { font-size: 0.85em; color: #8b949e; margin-top: -5px; margin-bottom: 5px; }

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-bottom: 15px;
}

.input-group { margin-bottom: 15px; display: flex; flex-direction: column; }
.input-group label { font-weight: 600; margin-bottom: 5px; }

input, textarea {
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}
input:focus, textarea:focus { outline: none; border-color: #58a6ff; }

button {
    cursor: pointer;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border: 1px solid rgba(240, 246, 252, 0.1);
    transition: 0.2s;
}

.btn-primary { background-color: var(--btn-bg); color: #fff; width: 100%; margin-bottom: 30px; }
.btn-primary:hover { background-color: var(--btn-hover); }

.output-wrapper { position: relative; }
.btn-copy {
    position: absolute;
    top: 10px;
    right: 10px;
    background-color: var(--btn-copy-bg);
    color: var(--text-color);
}
.btn-copy:hover { background-color: var(--btn-copy-hover); }

pre {
    background-color: #161b22;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 16px;
    overflow-x: auto;
    white-space: pre-wrap;
    word-wrap: break-word;
}
code { font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace; }