:root{
  --navy:#1b365d; --navy2:#2b4a7a; --bg:#e8eaed; --paper:#fff;
  --ink:#201f1e; --muted:#605e5c; --line:#c8c6c4; --gold:#c4a35a;
  --tab:#f3f2f1; --sel:#deecf9;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%;font-family:"Segoe UI",system-ui,sans-serif;background:var(--bg);color:var(--ink)}
#app{display:flex;flex-direction:column;height:100%}
.titlebar{background:var(--navy);color:#fff;display:flex;align-items:center;gap:12px;padding:6px 12px}
.titlebar b{letter-spacing:.04em}
#doc-title{background:transparent;border:0;color:#fff;font:inherit;min-width:180px;border-bottom:1px solid rgba(255,255,255,.3)}
.titlebar .right{margin-left:auto;display:flex;gap:8px;align-items:center;font-size:12px}
.tabs{background:var(--navy2);display:flex;gap:2px;padding:0 8px}
.tabs button{background:transparent;border:0;color:#d0d9e8;padding:8px 14px;cursor:pointer;font:inherit}
.tabs button.on{background:var(--tab);color:var(--ink);border-radius:6px 6px 0 0}
.ribbon{background:var(--tab);border-bottom:1px solid var(--line);padding:6px 10px;min-height:72px;display:none;flex-wrap:wrap;gap:10px}
.ribbon.on{display:flex}
.group{border-right:1px solid var(--line);padding:0 10px 0 0;display:flex;flex-wrap:wrap;align-items:center;gap:4px}
.group:last-child{border:0}
.group span.lbl{display:block;width:100%;font-size:10px;color:var(--muted);text-align:center}
button.tb,select.tb{background:#fff;border:1px solid var(--line);border-radius:3px;padding:4px 7px;cursor:pointer;font-size:13px}
button.tb:hover{background:var(--sel)}
button.tb.on{background:#cce4f7}
input[type=color]{width:28px;height:26px;padding:0;border:1px solid var(--line);background:#fff}
.workspace{flex:1;overflow:auto;padding:24px 0 48px}
.page{
  width:min(816px, calc(100% - 32px));
  min-height:1056px;
  margin:0 auto;
  background:var(--paper);
  box-shadow:0 2px 8px rgba(0,0,0,.18);
  padding:96px 96px 96px;
  outline:none;
  line-height:1.15;
}
.page.narrow{padding:48px}
.page.landscape{width:min(1056px, calc(100% - 32px));min-height:816px}
.page header.hf,.page footer.hf{font-size:12px;color:var(--muted);min-height:20px;outline:none}
.status{background:#f3f2f1;border-top:1px solid var(--line);padding:4px 12px;font-size:12px;display:flex;gap:16px}
.modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:20;align-items:center;justify-content:center}
.modal.on{display:flex}
.modal .box{background:#fff;padding:18px;border-radius:8px;min-width:320px;max-width:520px}
.modal input,.modal textarea{width:100%;margin:6px 0}
.file-menu{position:absolute;background:#fff;border:1px solid var(--line);box-shadow:0 8px 24px rgba(0,0,0,.2);display:none;z-index:15;min-width:220px}
.file-menu.on{display:block}
.file-menu button{display:block;width:100%;text-align:left;border:0;background:#fff;padding:8px 12px;cursor:pointer}
.file-menu button:hover{background:var(--sel)}
.page table{border-collapse:collapse;width:100%}
.page td,.page th{border:1px solid #999;padding:4px 8px;min-width:40px}
.ruler{height:18px;background:repeating-linear-gradient(90deg,#ddd 0 1px,transparent 1px 16px);margin:0 auto 6px;width:min(816px,calc(100% - 32px))}