:root{
  color-scheme:light;
  --bg:#eef3f3;
  --surface:#ffffff;
  --surface-soft:#e4eeee;
  --ink:#10252b;
  --muted:#4c656d;
  --faint:#748b92;
  --line:#cad9dc;
  --accent:#057787;
  --accent-dark:#045b68;
  --accent-soft:#d8eef0;
  --warm:#c65a45;
  --focus:#db9d22;
  font-family:"Noto Sans JP",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
@media(prefers-color-scheme:dark){
  :root{color-scheme:dark;--bg:#08171d;--surface:#10242b;--surface-soft:#0d2027;--ink:#e8f2f3;--muted:#a4bbc0;--faint:#759199;--line:#214149;--accent:#5bd2df;--accent-dark:#a9edf1;--accent-soft:#12383e;--warm:#ff957c;--focus:#ffd16e;}
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:radial-gradient(ellipse 60vw 50vh at 92% -10%,color-mix(in srgb,var(--accent) 18%,transparent),transparent 70%),var(--bg);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid var(--focus);outline-offset:3px}
button,input,textarea{font:inherit}
button{cursor:pointer}
[hidden]{display:none!important}
.language-switch{position:fixed;right:14px;top:14px;z-index:10;display:flex;gap:1px;font:600 11px/1 "JetBrains Mono",ui-monospace,monospace}
.language-switch a{display:inline-flex;align-items:center;min-height:40px;padding:0 12px;background:color-mix(in srgb,var(--surface) 92%,transparent);border:1px solid var(--line);text-decoration:none;color:var(--muted);backdrop-filter:blur(8px)}
.language-switch a:first-child{border-radius:7px 0 0 7px}.language-switch a:last-child{border-radius:0 7px 7px 0}.language-switch a[aria-current]{background:var(--accent);border-color:var(--accent);color:#fff}
.communication-shell{width:min(1120px,100%);margin:0 auto;padding:0 28px 64px}
.topline{display:flex;align-items:center;gap:20px;min-height:80px;padding:18px 0;border-bottom:1px solid var(--line);font-size:13px}
.topline a{text-decoration:none}.topline-title{margin:auto;color:var(--faint);font:600 10px/1.4 "JetBrains Mono",ui-monospace,monospace;letter-spacing:.16em}
.intro{padding:76px 0 44px;max-width:750px}.eyebrow,.panel-label{margin:0;color:var(--accent);font:600 11px/1.4 "JetBrains Mono",ui-monospace,monospace;letter-spacing:.17em;text-transform:uppercase}
h1,h2{font-family:"M PLUS 2","Noto Sans JP",system-ui,sans-serif;line-height:1.25;letter-spacing:.01em}h1{font-size:clamp(34px,5vw,58px);margin:16px 0 18px;max-width:12ch}h2{font-size:clamp(21px,3vw,28px);margin:6px 0 9px}.lead{font-size:17px;line-height:1.9;color:var(--muted);max-width:55ch;margin:0 0 24px}
.privacy-note{display:flex;gap:12px;align-items:flex-start;padding:16px 18px;border:1px solid color-mix(in srgb,var(--accent) 42%,var(--line));border-radius:12px;background:var(--accent-soft);color:var(--muted);font-size:13px;line-height:1.75}.privacy-note>span:first-child{color:var(--accent);font-size:22px;line-height:1}.privacy-note strong{color:var(--ink)}
.workspace-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:18px;align-items:start}.panel{border:1px solid var(--line);border-radius:18px;background:var(--surface);padding:28px;box-shadow:0 18px 50px -42px rgba(5,62,72,.55)}.panel-heading{margin-bottom:22px}.panel-heading>p:last-child{color:var(--muted);font-size:13px;margin:0}.output-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:14px}
label{display:grid;gap:7px;color:var(--muted);font-size:13px;margin:0 0 16px}label input,label textarea{width:100%;border:1px solid var(--line);border-radius:9px;background:var(--bg);color:var(--ink);padding:12px 13px;font-size:15px;line-height:1.6}label textarea{resize:vertical;min-height:92px}label input::placeholder,label textarea::placeholder{color:var(--faint);opacity:.85}.required{display:inline-block;width:max-content;padding:2px 7px;border-radius:99px;background:var(--accent-soft);color:var(--accent);font:600 10px/1.3 "JetBrains Mono",ui-monospace,monospace;letter-spacing:.04em}
.form-actions,.output-actions,.draft-actions{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-top:22px}.primary,.secondary{min-height:44px;border-radius:9px;padding:10px 17px;border:1px solid var(--line);font-size:14px;font-weight:700}.primary{background:var(--accent);border-color:var(--accent);color:#fff}.primary:hover{background:var(--accent-dark);border-color:var(--accent-dark)}.secondary{background:var(--surface);color:var(--muted)}.secondary:hover{border-color:var(--accent);color:var(--accent)}button:disabled{cursor:not-allowed;opacity:.48}
.mode-tabs{display:flex;gap:5px;padding:4px;border:1px solid var(--line);border-radius:10px;background:var(--bg);flex:none}.mode-tab{min-height:36px;padding:7px 11px;border:0;border-radius:7px;background:transparent;color:var(--muted);font-size:12px}.mode-tab.active{background:var(--surface);box-shadow:0 2px 8px rgba(5,62,72,.12);color:var(--accent);font-weight:700}.output-hint{min-height:28px;color:var(--faint);font-size:13px;margin:0 0 10px}.output-text{width:100%;min-height:345px;resize:vertical;padding:16px;border:1px solid var(--line);border-radius:11px;background:var(--bg);color:var(--ink);font-size:14px;line-height:1.85}.output-text:focus{border-color:var(--accent)}#copy-status{color:var(--accent);font-size:13px}
.quality{margin-top:26px;padding-top:20px;border-top:1px solid var(--line)}.quality-title{margin:0 0 9px;font-size:12px;font-weight:700;color:var(--ink)}.quality ul{list-style:none;margin:0;padding:0;display:grid;gap:7px}.quality li{position:relative;padding-left:24px;color:var(--faint);font-size:12.5px}.quality li::before{content:"○";position:absolute;left:0;color:var(--faint);font-size:16px;line-height:1.4}.quality li.ok{color:var(--muted)}.quality li.ok::before{content:"✓";color:var(--accent);font-weight:700}
.draft-actions{justify-content:space-between}.draft-actions a{font-size:13px}.saved-section{margin-top:62px;padding-top:28px;border-top:1px solid var(--line)}.section-heading{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}.section-heading h2{margin-right:auto}.section-heading>span{color:var(--faint);font:600 11px/1 "JetBrains Mono",ui-monospace,monospace}.section-note{color:var(--muted);font-size:13px;margin:0 0 18px}.draft-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px;list-style:none;padding:0;margin:0}.draft-card{display:grid;gap:10px;padding:17px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.draft-card-title{margin:0;font-size:15px;font-weight:700;overflow-wrap:anywhere}.draft-card-meta{margin:0;color:var(--faint);font-size:12px}.draft-card-actions{display:flex;gap:8px}.draft-card-actions button{min-height:38px;padding:7px 11px;border:1px solid var(--line);border-radius:7px;background:transparent;color:var(--muted);font-size:12px}.draft-card-actions button:first-child{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 42%,var(--line))}.draft-card-actions button:hover{border-color:var(--accent);color:var(--accent)}footer{margin-top:70px;padding-top:22px;border-top:1px solid var(--line);color:var(--faint);font-size:12px}footer a{text-decoration:none}
@media(max-width:800px){.communication-shell{padding-inline:18px}.intro{padding-top:62px}.workspace-grid{grid-template-columns:1fr}.output-panel{order:2}.saved-section{margin-top:46px}}
@media(max-width:520px){.language-switch{right:9px;top:9px}.language-switch a{min-height:38px;padding-inline:10px}.topline{padding-top:62px;min-height:0;gap:12px}.topline-title{font-size:9px}.intro{padding:50px 0 30px}h1{font-size:36px}.lead{font-size:15px}.panel{padding:20px;border-radius:14px}.output-heading{display:block}.mode-tabs{margin-top:16px;width:max-content}.output-text{min-height:300px}.draft-actions{align-items:flex-start;flex-direction:column}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
@media print{.language-switch,.form-actions,.output-actions,.draft-actions,.mode-tabs{display:none}.communication-shell{max-width:none}.workspace-grid{display:block}.panel{box-shadow:none;margin-bottom:20px}}