:root{--bg: #fff;--muted: #6c757d;--accent: #0d6efd;--success: #198754;--warning: #ffc107;--danger: #dc3545;--radius: 8px;--gap: 1rem;--pad: 1rem;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif}[data-theme=dark]{--bg: #121212;--muted: #adb5bd }html,body{height:100%}body{margin:0;background:var(--bg);color:#111;display:flex;flex-direction:column;min-height:100vh}.skip-link{position:absolute;left:1rem;top:-4rem;padding:.5rem 1rem;background:var(--accent);color:#fff;border-radius:6px;z-index:999}.skip-link:focus{top:1rem}header.site-header{display:flex;align-items:center;justify-content:space-between;padding:var(--pad);border-bottom:1px solid #eee;background:rgba(0,0,0,0)}.logo{display:flex;gap:.75rem;align-items:center}.logo .icon{font-size:1.6rem}.controls{display:flex;gap:.75rem;align-items:center}main.main{flex:1;display:grid;grid-template-columns:260px 1fr 360px;gap:var(--gap);padding:var(--pad);overflow:hidden}@media(max-width: 980px){main.main{grid-template-columns:1fr;grid-auto-rows:auto}}.card{background:rgba(0,0,0,0);border:1px solid #eee;border-radius:var(--radius);padding:1rem}.editor-wrap{display:flex;flex-direction:column;height:100%;min-height:60vh}.editor-toolbar{display:flex;gap:.5rem;padding:.5rem;border:1px solid #eee;border-radius:6px 6px 0 0;background:#fafafa}.toolbar-btn{padding:.4rem .6rem;border-radius:6px;border:1px solid #ddd;background:#fff;cursor:pointer}textarea.editor{flex:1;padding:1.25rem;border:1px solid #eee;border-top:0;border-radius:0 0 8px 8px;font-family:Georgia,serif;font-size:1.05rem;line-height:1.7;resize:none;min-height:40vh;overflow:auto}.stats-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:.6rem}.stat{background:#fafafa;padding:.6rem;border-radius:6px;text-align:center}.time-main{font-family:monospace;font-size:2.25rem;font-weight:700;display:block;text-align:center}.progress{height:8px;background:#eee;border-radius:999px;overflow:hidden}.progress>span{display:block;height:100%;width:0;background:var(--success);transition:width .25s}.structure-list{display:flex;flex-direction:column;gap:.5rem}.structure-item{display:flex;justify-content:space-between;align-items:center;padding:.6rem;background:#fafafa;border-radius:6px}.toast{position:fixed;right:1rem;bottom:1rem;padding:.75rem 1rem;border-radius:8px;background:#fff;border:1px solid #ddd;box-shadow:0 6px 24px rgba(0,0,0,.08)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0, 0, 0, 0);white-space:nowrap;border:0}