:root{
    --bg:#f5f4f0;
    --card:#ffffff;
    --ink:#23262b;
    --sub:#6b7280;
    --line:#e7e5df;
    --field:#fbfaf7;
    --accent:#f0efe9;
    --brand:#0f766e;
    --brand-dark:#0b5a54;
    --normal:#2f9e6f;
    --mild:#dd8f22;
    --high:#d8523f;
    --shadow:0 1px 2px rgba(20,22,26,.04),0 8px 24px rgba(20,22,26,.06);
    --r:14px;
  }
  [data-theme="dark"]{
    --bg:#1e1e1e;
    --card:#2d2d2d;
    --ink:#e0e0e0;
    --sub:#aaaaaa;
    --line:#444444;
    --field:#262626;
    --accent:#3a3a3a;
    --brand:#0f766e;
    --brand-dark:#0b5a54;
    --normal:#43c78d;
    --mild:#e8a83f;
    --high:#ef6d5a;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.35);
  }
  *{box-sizing:border-box}
  html,body{margin:0}
  body{
    background:var(--bg);
    color:var(--ink);
    font-family:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Segoe UI",sans-serif;
    line-height:1.6;
    -webkit-font-smoothing:antialiased;
    padding:calc(20px + env(safe-area-inset-top)) 16px calc(24px + env(safe-area-inset-bottom));
    transition:background .2s,color .2s;
  }
  .wrap{max-width:460px;margin:0 auto}

  header{display:flex;align-items:flex-start;justify-content:space-between;gap:12px;margin:4px 2px 18px}
  .head-left{min-width:0}
  h1{font-size:1.3rem;font-weight:700;margin:0;letter-spacing:.02em;display:flex;align-items:center;gap:8px}
  h1 .ico{width:1.35em;height:1.35em;object-fit:contain;flex:none}
  header p{margin:4px 0 0;color:var(--sub);font-size:.82rem}

  /* テーマ切替（AIテキスト・割り勘と同仕様） */
  .btn-theme{display:flex;align-items:center;gap:6px;flex:none;
    background:var(--accent);border:1px solid var(--line);color:var(--sub);
    padding:5px 10px;border-radius:6px;cursor:pointer;font-family:inherit;font-size:12px;font-weight:700;
    transition:all .15s;-webkit-tap-highlight-color:transparent}
  .btn-theme:hover{border-color:#888;color:var(--ink)}
  .theme-icon{width:16px;height:16px;filter:invert(1)}
  [data-theme="light"] .theme-icon{filter:invert(0)}

  .card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:18px 16px;margin-bottom:16px}
  .label{font-size:.78rem;font-weight:700;color:var(--sub);letter-spacing:.04em;margin:0 0 8px}

  /* 日時 */
  .dt{display:flex;gap:8px;flex-wrap:wrap}
  .dt input[type=date]{flex:1.3;min-width:150px}
  .dt input[type=time]{flex:1;min-width:110px}
  select,input[type=text],input[type=date],input[type=time]{
    font-family:inherit;font-size:1rem;color:var(--ink);
    background:var(--field);border:1px solid var(--line);border-radius:10px;
    padding:11px 10px;appearance:none;-webkit-appearance:none;
  }
  select{padding-right:26px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='7' viewBox='0 0 10 7'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%236b7280' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 9px center}
  input[type=date]::-webkit-calendar-picker-indicator,
  input[type=time]::-webkit-calendar-picker-indicator{opacity:.6;cursor:pointer}
  [data-theme="dark"] input[type=date]::-webkit-calendar-picker-indicator,
  [data-theme="dark"] input[type=time]::-webkit-calendar-picker-indicator{filter:invert(1)}

  /* 体温 */
  .temp-row{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:2px}
  .stepper{width:48px;height:48px;border-radius:50%;border:1px solid var(--line);background:var(--field);
    font-size:1.5rem;color:var(--brand);cursor:pointer;display:flex;align-items:center;justify-content:center;
    line-height:1;transition:background .15s,transform .05s;flex:none;-webkit-tap-highlight-color:transparent}
  .stepper:hover{background:var(--accent)}
  .stepper:active{transform:scale(.94)}
  .temp-display{display:flex;align-items:baseline;gap:4px;min-width:150px;justify-content:center}
  .temp-display input{
    width:112px;border:none;background:transparent;text-align:right;
    font-family:"Roboto Mono",ui-monospace,monospace;font-weight:700;font-size:3rem;
    color:var(--temp-c,var(--ink));padding:0;letter-spacing:-.02em;transition:color .2s;
  }
  .temp-display input:focus{outline:none}
  .temp-display .deg{font-family:"Roboto Mono",monospace;font-size:1.4rem;font-weight:500;color:var(--temp-c,var(--sub))}
  .temp-tag{text-align:center;margin-top:6px;font-size:.78rem;font-weight:700;color:var(--temp-c,var(--sub));letter-spacing:.05em}

  input[type=text].note{width:100%}

  .add{width:100%;margin-top:16px;padding:14px;border:none;border-radius:12px;
    background:var(--brand);color:#fff;font-family:inherit;font-size:1rem;font-weight:700;
    cursor:pointer;transition:background .15s,transform .05s;-webkit-tap-highlight-color:transparent}
  .add:hover{background:var(--brand-dark)}
  .add:active{transform:scale(.99)}

  .hint{color:var(--high);font-size:.78rem;margin:8px 2px 0;display:none}
  .hint.show{display:block}

  /* records */
  .rec-head{display:flex;align-items:center;justify-content:space-between;margin:2px 2px 10px}
  .rec-head-right{display:flex;align-items:center;gap:12px}
  .rec-head .cnt{color:var(--sub);font-size:.78rem;font-weight:500}
  .clear-btn{border:1px solid var(--line);background:transparent;color:var(--sub);
    font-family:inherit;font-size:.74rem;font-weight:700;padding:4px 10px;border-radius:999px;cursor:pointer;
    transition:all .15s;-webkit-tap-highlight-color:transparent}
  .clear-btn:hover{color:var(--high);border-color:var(--high)}
  .clear-btn[hidden]{display:none}
  ul.recs{list-style:none;margin:0;padding:0}
  ul.recs li{display:flex;align-items:center;gap:12px;padding:12px 6px;border-bottom:1px solid var(--line)}
  ul.recs li:last-child{border-bottom:none}
  .sev{width:4px;align-self:stretch;border-radius:3px;flex:none;background:var(--s,var(--line))}
  .rec-body{flex:1;min-width:0}
  .rec-top{display:flex;align-items:baseline;gap:10px}
  .rec-dt{font-size:.9rem;color:var(--sub);font-variant-numeric:tabular-nums}
  .rec-temp{font-family:"Roboto Mono",monospace;font-weight:700;font-size:1.15rem;color:var(--s,var(--ink))}
  .rec-note{font-size:.82rem;color:var(--sub);margin-top:1px;word-break:break-word}
  .del{border:none;background:transparent;color:#b7b3ab;font-size:1.2rem;cursor:pointer;padding:6px;line-height:1;flex:none;border-radius:8px;-webkit-tap-highlight-color:transparent}
  .del:hover{color:var(--high);background:rgba(216,82,63,.12)}
  .empty{color:var(--sub);font-size:.86rem;text-align:center;padding:14px 0}

  /* share */
  .share-title{display:flex;align-items:center;gap:7px;font-weight:700;font-size:.95rem;margin:0 0 10px}
  pre.preview{background:var(--field);border:1px solid var(--line);border-radius:10px;padding:12px;
    font-family:inherit;font-size:.86rem;color:var(--ink);white-space:pre-wrap;word-break:break-word;margin:0 0 10px;line-height:1.7}
  .btn-row{display:flex;gap:10px}
  .cbtn{flex:1;padding:12px;border-radius:10px;border:1px solid var(--brand);background:var(--card);color:var(--brand);
    font-family:inherit;font-weight:700;font-size:.9rem;cursor:pointer;transition:background .15s;-webkit-tap-highlight-color:transparent}
  .cbtn:hover{background:var(--accent)}
  .cbtn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}
  .cbtn.primary:hover{background:var(--brand-dark)}
  [data-theme="dark"] .cbtn:not(.primary){color:#4bd0c4;border-color:#2f8f86}
  .share-note{color:var(--sub);font-size:.74rem;margin:10px 2px 0;line-height:1.6}

  /* about + footer */
  details.about{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);margin-bottom:16px;overflow:hidden}
  details.about>summary{list-style:none;cursor:pointer;padding:15px 16px;font-weight:700;font-size:.9rem;color:var(--ink);display:flex;align-items:center;justify-content:space-between;-webkit-tap-highlight-color:transparent}
  details.about>summary::-webkit-details-marker{display:none}
  details.about>summary::after{content:"＋";color:var(--sub);font-weight:400;font-size:1.1rem;transition:transform .2s}
  details.about[open]>summary::after{content:"−"}
  details.about .doc{padding:0 16px 16px}
  details.about .doc ul{margin:0;padding-left:1.1em}
  details.about .doc li{font-size:.83rem;color:var(--sub);line-height:1.7;margin-bottom:8px}
  details.about .doc li:last-child{margin-bottom:0}
  details.about .doc strong{color:var(--ink)}
  .footer-copyright{margin-top:4px;padding:14px 4px 0;border-top:1px solid var(--line);
    display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px}
  .footer-copy-text{margin:0;font-size:.76rem;color:var(--sub)}
  .footer-link{color:var(--sub);text-decoration:none;border-bottom:1px solid var(--line)}
  .footer-link:hover{color:var(--brand);border-color:var(--brand)}
  .footer-tools-link{font-size:.76rem;white-space:nowrap}

  /* toast */
  .toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(20px);
    background:var(--ink);color:var(--bg);padding:10px 18px;border-radius:999px;font-size:.85rem;font-weight:500;
    opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:20}
  .toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

  @media (prefers-reduced-motion:reduce){*{transition:none!important}}