.header{display:flex;align-items:center;gap:16px;padding:16px 18px;background:var(--penna-c-bg-elevated);border-bottom:1px solid color-mix(in srgb,var(--penna-c-text-3) 22%,transparent)}.back{text-decoration:none;color:var(--penna-c-brand-1);font-size:13px}.back:hover{color:var(--penna-c-brand-2)}.title{font-weight:650;color:var(--penna-c-text-1)}.layout{display:grid;grid-template-columns:1fr 1fr;gap:14px;padding:16px 18px 28px;height:calc(100vh - 64px)}.panel{background:var(--penna-c-bg);border:1px solid color-mix(in srgb,var(--penna-c-text-3) 22%,transparent);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;min-height:0}.panel-title{padding:12px 14px;border-bottom:1px solid color-mix(in srgb,var(--penna-c-text-3) 14%,transparent);font-size:13px;color:var(--penna-c-text-2);font-weight:600}.preview{flex:1;min-height:0;padding:14px;overflow:auto}@media(max-width:900px){.layout{grid-template-columns:1fr;height:auto}}.header{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.subtitle{font-size:12px;color:var(--penna-c-text-3);font-weight:400}.theme-btn{margin-left:auto;padding:6px 12px;border:1px solid color-mix(in srgb,var(--penna-c-text-3) 35%,transparent);border-radius:999px;background:var(--penna-c-bg);color:var(--penna-c-text-1);font-size:12px;font-weight:500;cursor:pointer}.theme-btn:hover{border-color:var(--penna-c-brand-2);background:var(--penna-c-bg-elevated)}.skin-label{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--penna-c-text-2)}.skin-select{padding:5px 8px;border:1px solid color-mix(in srgb,var(--penna-c-text-3) 35%,transparent);border-radius:8px;background:var(--penna-c-bg);color:var(--penna-c-text-1);font-size:12px}.layout{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr) minmax(220px,.55fr)}.textarea{width:100%;flex:1;min-height:0;border:none;padding:14px;outline:none;font-size:13px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;resize:none;background:var(--penna-c-bg);color:var(--penna-c-text-1)}.btn{margin:10px 14px 14px;padding:10px 14px;border:none;border-radius:8px;background:var(--penna-c-brand-1);color:var(--penna-c-contrast-light);cursor:pointer}.btn:hover{background:var(--penna-c-brand-2)}.preview-wrap{flex:1;min-height:0;overflow:auto}.panel-side{font-size:13px}.panel-title-sub{border-top:1px solid color-mix(in srgb,var(--penna-c-text-3) 14%,transparent)}.stats{padding:12px 14px}.stats dl{margin:0;display:grid;grid-template-columns:auto 1fr;gap:6px 12px}.stats dt{margin:0;color:var(--penna-c-text-3);font-size:12px}.stats dd{margin:0;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;font-size:12px;word-break:break-all;color:var(--penna-c-text-1)}.toc{flex:1;min-height:0;overflow:auto;padding:8px 10px 14px;display:flex;flex-direction:column;gap:2px}.toc-item{display:block;padding:4px 8px;border-radius:6px;color:var(--penna-c-text-2);text-decoration:none;line-height:1.4;font-size:12px}.toc-item:hover{background:var(--penna-c-bg-elevated);color:var(--penna-c-brand-1)}.toc-h1{padding-left:8px;font-weight:600}.toc-h2{padding-left:16px}.toc-h3{padding-left:24px;color:var(--penna-c-text-2)}.toc-h4{padding-left:32px;color:var(--penna-c-text-3)}.toc-h5{padding-left:40px;color:var(--penna-c-text-3)}.toc-h6{padding-left:48px;color:var(--penna-c-text-3)}.sidebar-empty{margin:0;padding:8px;color:var(--penna-c-text-3);font-size:12px}.renderer-error{margin:0;color:var(--penna-c-danger);font-size:13px}@media(max-width:1100px){.layout{grid-template-columns:1fr 1fr;height:auto}.panel-side{grid-column:1/-1;max-height:280px}}@media(max-width:720px){.layout{grid-template-columns:1fr}}