:root{--bg: #0d0f17;--bg-soft: #151926;--bg-pane: #11141f;--border: #232a3d;--ink: #e6e8f0;--ink-dim: #8b93a9;--accent: #ff5470;--accent-2: #ffd166;--jade: #4fd1a5;--mono: "JetBrains Mono", "Fira Code", "SFMono-Regular", "Cascadia Code", "Source Han Mono", Menlo, Consolas, monospace;--sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, sans-serif}*{box-sizing:border-box}html,body{margin:0;height:100%}body{background:radial-gradient(1200px 600px at 80% -10%,#1c2233 0%,var(--bg) 55%);color:var(--ink);font-family:var(--sans);display:flex;flex-direction:column;min-height:100vh}#app{display:flex;flex-direction:column;flex:1;max-width:1180px;width:100%;margin:0 auto;padding:1.5rem 1.25rem 0}.topbar h1{margin:0;font-size:1.55rem;letter-spacing:.5px;display:flex;align-items:center;gap:.55rem}.logo{display:inline-grid;place-items:center;width:2.2rem;height:2.2rem;border-radius:.7rem;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#1a1018;font-weight:800;box-shadow:0 6px 22px -8px var(--accent)}.tagline{margin:.35rem 0 1rem;color:var(--ink-dim);font-size:.92rem}.presets{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:1.1rem}.preset-btn{font-family:var(--sans);font-size:.86rem;color:var(--ink);background:var(--bg-soft);border:1px solid var(--border);border-radius:999px;padding:.42rem .95rem;cursor:pointer;transition:all .15s ease}.preset-btn:hover{border-color:var(--accent);color:#fff;transform:translateY(-1px)}.grid{display:grid;grid-template-columns:1.05fr .95fr;gap:1rem;flex:1;min-height:0}@media (max-width: 820px){.grid{grid-template-columns:1fr}}.pane{display:flex;flex-direction:column;background:var(--bg-pane);border:1px solid var(--border);border-radius:.9rem;overflow:hidden;min-height:360px}.pane-head{display:flex;align-items:center;justify-content:space-between;padding:.55rem .85rem;border-bottom:1px solid var(--border);background:var(--bg-soft)}.pane-title{font-size:.82rem;letter-spacing:1px;color:var(--ink-dim);text-transform:uppercase}.run-btn{font-family:var(--sans);font-weight:700;font-size:.86rem;color:#1a1018;background:linear-gradient(135deg,var(--accent-2),var(--accent));border:none;border-radius:.55rem;padding:.4rem 1rem;cursor:pointer;box-shadow:0 4px 16px -6px var(--accent);transition:transform .1s ease,filter .1s ease}.run-btn:hover{filter:brightness(1.08)}.run-btn:active{transform:translateY(1px)}.ghost-btn{font-family:var(--sans);font-size:.8rem;color:var(--ink-dim);background:transparent;border:1px solid var(--border);border-radius:.5rem;padding:.32rem .7rem;cursor:pointer}.ghost-btn:hover{color:var(--ink);border-color:var(--ink-dim)}.editor{flex:1;min-height:0;overflow:auto}.cm-editor{height:100%;background:var(--bg-pane);font-family:var(--mono);font-size:14px}.cm-editor .cm-scroller{font-family:var(--mono);line-height:1.6}.cm-editor.cm-focused{outline:none}.cm-gutters{background:var(--bg-pane);border-right:1px solid var(--border);color:var(--ink-dim)}.cm-activeLine,.cm-activeLineGutter{background:#ffd1660f}.cm-content{caret-color:var(--accent-2);color:var(--ink)}.cm-selectionBackground,.cm-editor ::selection{background:#ff54704d!important}.output{flex:1;margin:0;padding:.9rem 1rem;overflow:auto;font-family:var(--mono);font-size:13.5px;line-height:1.65;white-space:pre-wrap;word-break:break-word}.output .line.printed{color:var(--ink)}.output .line.value{color:var(--jade)}.output .line.error{color:var(--accent);font-weight:600}.footer{text-align:center;color:var(--ink-dim);font-size:.8rem;padding:1rem 0 1.4rem}.footer kbd{background:var(--bg-soft);border:1px solid var(--border);border-radius:.35rem;padding:.05rem .4rem;font-family:var(--mono);font-size:.75rem}