:root {
    --bg: #fff;
    --fg: #111;
    --muted: #666;
    --accent: #115;
    --val-sel-bg: rgba(211, 51, 51, 0.12);
    --col-sel-bg: rgba(0, 250, 0, 0.22);
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
    background: var(--bg);
    color: var(--fg);
    margin: 20px;
}

.container {
    max-width: 980px;
    margin: 0 auto;
}

h1 {
    font-size: 18px;
    margin: 0 0 12px 0;
}

.controls {
    margin-bottom: 8px;
    display: flex;
    gap: 8px;
    align-items: center;
}

button {
    padding: 6px 10px;
    font-size: 14px;
    cursor: pointer;
}

.msg {
    color: var(--muted);
    font-size: 13px;
}

label {
    display: block;
    margin-bottom: 6px;
    color: var(--muted);
}

textarea {
    width: 100%;
    min-height: 160px;
    font-family: monospace;
    font-size: 13px;
    line-height: 1.4;
    padding: 10px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 6px;
    resize: vertical;
}

.hidden {
    display: none;
}

#rendered {
    font-family: monospace;
    white-space: pre-wrap;
    word-break: break-word;
    padding: 10px;
    border: 1px solid #e2e2e2;
    border-radius: 6px;
    min-height: 120px;
    position: relative;
    background: #fafafa;
}

/* column name style */
.col-name {
    cursor: pointer;
    color: var(--muted);
    background: transparent;
    padding: 2px 4px;
    border-radius: 4px;
    margin-right: 4px;
    display: inline-block;
}

.col-name:hover {
    background: #eee;
    color: var(--fg);
}

/* value tokens */
.val {
    color: var(--fg);
}

.val.highlight {
    background: var(--val-sel-bg);
    border-radius: 3px;
    padding: 0 2px;
}

/* selected column indicator */
.col-name.selected {
    background: var(--col-sel-bg);
    color: var(--accent);
    font-weight: 600;
}

/* small hint text */
.hint {
    margin-top: 8px;
    color: var(--muted);
    font-size: 13px;
}