:root{
    --tiffany:#81d8d0; --tiffany-soft:#b8e4de; --tiffany-bg:#d6efeb;
    --bg:#d6efeb; --card:#ffffff; --line:#9ed3cb; --ink:#1f3d3a; --muted:#5a7a76;
    --accent:#c0392b; --accent2:#0aa29a; --ok:#16a34a;
    --orange:#f29849; --orange-dark:#d77a2c;
  }
  *{box-sizing:border-box}
  html,body{margin:0;padding:0;color:var(--ink);
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang TC","Microsoft JhengHei",sans-serif;
    -webkit-tap-highlight-color:transparent;
    background:var(--bg)
      url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'><g fill='%231f3d3a' opacity='0.05'><ellipse cx='15' cy='22' rx='5' ry='4'/><ellipse cx='10' cy='14' rx='2' ry='2.6'/><ellipse cx='20' cy='14' rx='2' ry='2.6'/><ellipse cx='6' cy='18' rx='1.6' ry='2.2'/><ellipse cx='24' cy='18' rx='1.6' ry='2.2'/><ellipse cx='42' cy='48' rx='5' ry='4'/><ellipse cx='37' cy='40' rx='2' ry='2.6'/><ellipse cx='47' cy='40' rx='2' ry='2.6'/><ellipse cx='33' cy='44' rx='1.6' ry='2.2'/><ellipse cx='51' cy='44' rx='1.6' ry='2.2'/></g></svg>");
  }
  header{position:sticky;top:0;
    background:linear-gradient(180deg,#a3ddd5 0%,#c6e9e3 100%);
    border-bottom:1px solid var(--line);
    padding:10px 12px;z-index:10;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
  header h1{font-size:16px;margin:0;flex:1;color:#0f2e2b;letter-spacing:0.5px}
  header .who{font-size:12px;color:#3a5a56}
  .cat{width:44px;height:44px;flex-shrink:0;filter:drop-shadow(0 1px 1px rgba(0,0,0,.12))}
  .cat-sm{width:32px;height:32px}
  .sync-dot{width:10px;height:10px;border-radius:50%;background:#cfd8d6;flex-shrink:0;
    box-shadow:0 0 0 2px rgba(255,255,255,.7);transition:background .2s}
  .sync-dot.ok{background:#16a34a}
  .sync-dot.err{background:#dc2626}
  .sync-dot.syncing{background:#0aa29a;animation:pulse 1s infinite}
  @keyframes pulse{50%{opacity:.4}}
  .section-title{font-size:13px;font-weight:600;color:#0f3a36;margin:14px 0 8px;padding-top:10px;border-top:1px solid var(--line)}
  main{padding:12px;max-width:880px;margin:0 auto}
  .card{background:var(--card);border:1px solid var(--line);border-radius:14px;
    padding:12px;margin-bottom:12px;box-shadow:0 1px 2px rgba(31,61,58,.06)}
  .row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
  label{font-size:13px;color:#444}
  input[type=text],input[type=date],input[type=number],input[type=month],select{
    padding:8px 10px;border:1px solid var(--line);border-radius:8px;background:#fff;
    font-size:15px;min-width:0}
  input[type=number]{width:100px}
  button{padding:9px 12px;border:1px solid var(--line);background:#fff;border-radius:8px;
    font-size:14px;cursor:pointer}
  button.primary{background:var(--tiffany);color:#0f2e2b;border-color:var(--accent2);font-weight:600}
  button.primary:hover{background:var(--accent2);color:#fff}
  button.ghost{background:transparent}
  button.danger{color:#c0392b;border-color:#e8b6b0}
  .pill{display:inline-flex;align-items:center;gap:4px;padding:4px 8px;border:1px solid var(--line);
    border-radius:999px;font-size:12px;background:#fff;cursor:pointer;user-select:none}
  .pill.on{background:#fff3ec;border-color:var(--orange-dark);color:var(--orange-dark)}
  .pill .sym{font-weight:700}
  .grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
  .month-tabs{display:flex;gap:5px;margin-bottom:8px;flex-wrap:wrap}
  .month-tabs button{padding:6px 10px;font-size:13px;min-width:44px}
  .month-tabs button.on{background:var(--tiffany);color:#0f2e2b;border-color:var(--accent2);font-weight:600}

  /* chart */
  .chart-wrap{overflow:hidden}
  svg.chart{display:block;background:#fff;width:100%;height:auto;max-width:640px;margin:0 auto;border-radius:6px}
  svg.chart .day-hit{fill:transparent;cursor:pointer}
  svg.chart .day-hit:hover{fill:rgba(129,216,208,0.25)}
  svg.chart .day-hit:active{fill:rgba(129,216,208,0.45)}

  /* day list */
  .day{display:flex;gap:8px;align-items:center;padding:8px 6px;border-bottom:1px dashed var(--line)}
  .day:last-child{border-bottom:0}
  .day .dt{width:60px;font-variant-numeric:tabular-nums;font-size:13px;color:#333}
  .day .tmp{width:80px;font-variant-numeric:tabular-nums;font-weight:700}
  .day .tags{flex:1;display:flex;flex-wrap:wrap;gap:4px;font-size:12px;color:#666}
  .day .edit{font-size:12px;color:var(--accent2);cursor:pointer}

  /* reminder */
  .reminder{background:#fff3e6;border:1px solid #f0c89a;color:#7a4500;
    padding:10px 12px;border-radius:12px;display:flex;align-items:center;gap:10px;
    margin-bottom:12px;box-shadow:0 1px 2px rgba(31,61,58,.06)}
  .reminder strong{color:#7a4500}
  .reminder button{margin-left:auto;background:var(--orange);color:#fff;border-color:var(--orange-dark)}
  .reminder.backup{background:#fdecec;border-color:#f5b7b1}
  .reminder.backup strong{color:#922b1f}
  .reminder.backup button{background:#c0392b;border-color:#922b1f}

  /* prediction */
  .stat{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:8px}
  .stat .box{background:#eaf6f4;border:1px solid var(--line);border-radius:10px;padding:10px}
  .stat .box .lbl{font-size:11px;color:#3a5a56}
  .stat .box .val{font-size:16px;font-weight:700;color:#0f3a36;margin-top:2px;font-variant-numeric:tabular-nums}
  .stat .box.warn{background:#fef2f2;border-color:#fecaca}
  .stat .box.warn .lbl{color:#991b1b}
  .stat .box.warn .val{color:#991b1b}
  .stat .box.ovu{background:#f0fdf4;border-color:#bbf7d0}
  .stat .box.ovu .lbl{color:#166534}
  .stat .box.ovu .val{color:#166534}

  /* modal */
  .mask{position:fixed;inset:0;background:rgba(0,0,0,.4);display:none;
    align-items:flex-end;justify-content:center;z-index:50}
  .mask.show{display:flex}
  .sheet{background:#fff;width:100%;max-width:560px;border-radius:16px 16px 0 0;
    padding:16px;max-height:90vh;overflow:auto}
  .sheet h3{margin:0 0 10px}
  .actions{display:flex;gap:8px;justify-content:flex-end;margin-top:12px}
  .hint{font-size:12px;color:var(--muted)}
  details summary{cursor:pointer;font-size:13px;color:#555;padding:4px 0}
  textarea{width:100%;min-height:60px;padding:8px;border:1px solid var(--line);border-radius:8px;
    font-family:inherit;font-size:14px}
  @media (min-width:560px){
    .sheet{border-radius:16px;align-self:center;margin:auto}
    .mask{align-items:center}
  }
  /* 手機橫向：縮小標題列與分頁、依螢幕高度限制圖表大小，讓整張表一目了然 */
  @media (orientation:landscape) and (max-height:600px){
    header{padding:5px 12px}
    .cat{width:30px;height:30px}
    header h1{font-size:14px}
    main{padding:8px}
    .card{padding:8px;margin-bottom:8px}
    .month-tabs{margin-bottom:4px;gap:4px}
    .month-tabs button{padding:3px 9px;font-size:12px;min-width:36px}
    /* 圖表固定比例約 360:307（W/H≈1.173）；用可視高度反推 max-width，使圖高≈螢幕高−120px */
    svg.chart{max-width:min(640px, calc((100vh - 120px) * 1.173))}
    svg.chart{max-width:min(640px, calc((100dvh - 120px) * 1.173))}
  }