:root {
    --bg: #f8fafc;
    --bg-card: #ffffff;
    --bg-code: #0f172a;
    --border: #e2e8f0;
    --text: #0f172a;
    --text-muted: #64748b;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --danger: #ef4444;
    --success: #22c55e;
    --shadow: 0 1px 3px rgba(0,0,0,.07), 0 4px 12px rgba(0,0,0,.04);
    --radius: .75rem;
    --font-mono: 'JetBrains Mono','Fira Code','Courier New',monospace;
}

.jdg-theme {
    font-family: 'Inter', system-ui, sans-serif;
    color: var(--text);
    background: var(--bg);
    padding: 1.5rem;
    border-radius: 1rem;
    max-width: 1300px;
    margin: 0 auto;
}

/* ── Utils ────────────────────────────────────────────────────────── */
.text-center { text-align: center; }
.text-3xl    { font-size: 1.875rem; font-weight: 800; }
.font-bold   { font-weight: 700; }
.text-muted  { color: var(--text-muted); }
.mt-2 { margin-top: .5rem; }
.mt-3 { margin-top: .75rem; }
.mt-4 { margin-top: 1rem; }
.mt-8 { margin-top: 2rem; }
.flex { display: flex; }
.gap-2 { gap: .5rem; }

/* ── Layout ───────────────────────────────────────────────────────── */
.app-layout { display: flex; flex-direction: column; gap: 1.5rem; }
@media (min-width: 1024px) {
    .app-layout { flex-direction: row; align-items: flex-start; }
    .config-panel { width: 400px; flex-shrink: 0; }
    .output-panel { flex: 1; position: sticky; top: 1.5rem; }
}

/* ── Config Panel ─────────────────────────────────────────────────── */
.config-panel {
    background: var(--bg-card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1.5rem; box-shadow: var(--shadow);
}
.config-top-bar { display: flex; justify-content: space-between; align-items: flex-end; gap: 1rem; }
.count-group { flex: 1; }
.ctrl-label { display: block; font-size: .78rem; font-weight: 700; text-transform: uppercase;
    letter-spacing: .05em; color: var(--text-muted); margin-bottom: .4rem; }
.count-row { display: flex; align-items: center; gap: .75rem; }
.range-input { flex: 1; accent-color: var(--primary); cursor: pointer; }
.count-badge {
    min-width: 36px; text-align: center; font-weight: 800; font-size: 1rem;
    background: var(--primary); color: #fff; padding: .15rem .5rem; border-radius: .35rem;
}

/* ── Fields ───────────────────────────────────────────────────────── */
.fields-header { border-bottom: 1px solid var(--border); padding-bottom: .35rem; }
.fields-list { display: flex; flex-direction: column; gap: .5rem; max-height: 60vh; overflow-y: auto; padding-right: .25rem; }

.field-row {
    background: #f8fafc; border: 1px solid var(--border); border-radius: .5rem;
    padding: .6rem .75rem; display: flex; flex-direction: column; gap: .4rem;
    transition: border-color .15s;
}
.field-row:hover { border-color: var(--primary); }
.field-row-top { display: flex; gap: .5rem; align-items: center; }
.field-key {
    flex: 1; padding: .4rem .6rem; border: 1px solid var(--border); border-radius: .4rem;
    font-size: .85rem; font-family: var(--font-mono); outline: none; background: #fff;
    transition: border-color .15s;
}
.field-key:focus { border-color: var(--primary); }
.field-type {
    flex: 1; padding: .4rem .6rem; border: 1px solid var(--border); border-radius: .4rem;
    font-size: .82rem; outline: none; background: #fff; cursor: pointer;
}
.field-type:focus { border-color: var(--primary); }
.btn-remove {
    padding: .3rem .5rem; border: none; background: none; cursor: pointer;
    color: var(--text-muted); border-radius: .35rem; transition: all .15s;
}
.btn-remove:hover { background: #fee2e2; color: var(--danger); }
.btn-remove i { width: 14px; height: 14px; display: block; }

.field-extra { display: flex; gap: .5rem; flex-wrap: wrap; }
.field-extra label { font-size: .78rem; font-weight: 600; color: var(--text-muted); display: flex; align-items: center; gap: .3rem; }
.field-extra input[type="number"],
.field-extra input[type="text"] {
    width: 72px; padding: .25rem .4rem; border: 1px solid var(--border);
    border-radius: .35rem; font-size: .82rem; outline: none; background: #fff;
}
.field-extra input[type="text"].wide { width: 100%; min-width: 160px; }

/* ── Drag handle ──────────────────────────────────────────────────── */
.drag-handle { cursor: grab; color: var(--text-muted); padding: 0 .2rem; }
.drag-handle i { width: 14px; height: 14px; }

/* ── Add button ───────────────────────────────────────────────────── */
.btn-add {
    width: 100%; justify-content: center; border: 1px dashed var(--border);
    color: var(--primary); font-weight: 600;
}
.btn-add:hover { background: #eef2ff; border-color: var(--primary); }

/* ── Output Panel ─────────────────────────────────────────────────── */
.output-header {
    display: flex; justify-content: space-between; align-items: center;
    flex-wrap: wrap; gap: .5rem;
}
.stats-label { font-size: .82rem; font-weight: 600; color: var(--text-muted); }
.output-actions { display: flex; gap: .5rem; }

.code-viewer { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.json-pre {
    margin: 0; background: var(--bg-code);
    overflow: auto; max-height: 75vh; padding: 1.25rem 1.5rem;
    border-radius: var(--radius);
}
#json-code {
    font-family: var(--font-mono); font-size: .8rem; line-height: 1.7;
    white-space: pre; display: block;
}

/* JSON Syntax Highlighting */
.jk { color: #7dd3fc; }   /* key */
.js { color: #86efac; }   /* string */
.jn { color: #fbbf24; }   /* number */
.jb { color: #f472b6; }   /* boolean */
.jnull { color: #94a3b8; } /* null */
.jp { color: #94a3b8; }   /* punctuation */

/* ── Buttons ──────────────────────────────────────────────────────── */
.btn {
    display: inline-flex; align-items: center; gap: .4rem; padding: .5rem 1rem;
    border-radius: .5rem; font-weight: 600; font-size: .85rem; cursor: pointer;
    border: none; transition: all .15s;
}
.btn-sm { padding: .35rem .75rem; font-size: .8rem; }
.btn i { width: 14px; height: 14px; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { background: #f1f5f9; }
.btn-ghost { background: transparent; color: var(--text-muted); border: 1px solid transparent; }
.btn-ghost:hover { background: #f1f5f9; color: var(--text); }

/* ── Toast ────────────────────────────────────────────────────────── */
.toast {
    position: fixed; bottom: 2rem; left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: #0f172a; color: #fff; padding: .7rem 1.5rem;
    border-radius: 2rem; font-weight: 600; font-size: .875rem;
    opacity: 0; transition: all .25s; z-index: 1000;
}
.toast.show { transform: translateX(-50%) translateY(0); opacity: 1; }