:root{--bg: #f4f1ec;--paper: #ffffff;--text: #2a2723;--muted: #8a837a;--line: #e2dcd2;--accent: #b8862f;--accent-2: #a2741f;--ok: #3f8f5c;--warn: #c0672b;--studio: #eef3f8;color-scheme:light}*{box-sizing:border-box}html,body,#root{margin:0;min-height:100%;background:var(--bg);color:var(--text);font:15px/1.45 Segoe UI,system-ui,-apple-system,sans-serif}button{font:inherit;border:1px solid var(--line);background:var(--paper);color:var(--text);border-radius:8px;padding:7px 14px;cursor:pointer}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}button.primary:hover:not(:disabled){background:var(--accent-2)}button.small{padding:4px 10px;font-size:13px}button.on{border-color:var(--accent);color:var(--accent-2);background:#fbf5ea}button.link{border:none;background:none;color:var(--accent-2);padding:0}input,textarea,select{font:inherit;color:var(--text);background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%}select{width:auto}textarea{resize:vertical}.muted{color:var(--muted)}.error{color:#b3261e}.ok{color:var(--ok)}.warn{color:var(--warn)}.small{font-size:13px}.grow{flex:1}.row{display:flex;gap:8px;align-items:center}.row.end{justify-content:flex-end}.center-page{max-width:440px;margin:14vh auto 0;padding:0 20px;text-align:center}.join{display:flex;flex-direction:column;gap:14px;text-align:left}.join h1{font-size:22px;margin:0;font-weight:600}.join label{display:flex;flex-direction:column;gap:6px;font-weight:500}.viewer{min-height:100vh;display:flex;flex-direction:column}.top{display:flex;align-items:center;gap:10px;padding:10px 18px;background:var(--paper);border-bottom:1px solid var(--line);flex-wrap:wrap;position:sticky;top:0;z-index:5}.brand{font-size:16px}.badge{border-radius:20px;padding:4px 12px;font-size:13px;font-weight:600}.badge.ok{background:#e7f3eb;color:var(--ok)}.badge.warn{background:#fbeee4;color:var(--warn)}.notice{background:#fbf5ea;border-bottom:1px solid var(--line);padding:8px 18px;font-size:14px}.layout{flex:1;display:grid;grid-template-columns:1fr 340px;gap:0;min-height:0}.book-area{padding:18px 18px 8px;display:flex;flex-direction:column;gap:12px;min-width:0}.book-wrap{position:relative;display:flex;align-items:center;justify-content:center;gap:10px;flex-direction:row;flex-wrap:wrap}.book{position:relative;width:min(calc(100% - 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