:root{
  --bg:#0e1117;
  --panel:#151a23;
  --panel2:#1d2430;
  --text:#e9eef7;
  --muted:#aeb7c7;
  --line:#2d3545;
  --accent:#6ee7b7;
  --accent2:#60a5fa;
  --warn:#fbbf24;
  --danger:#f87171;
  --ok:#34d399;
  --code:#090b10;
}
*{box-sizing:border-box}
body{margin:0;background:linear-gradient(180deg,#0b0f16,#111827 260px,#0e1117);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",Meiryo,sans-serif;line-height:1.65}
a{color:var(--accent2);text-decoration:none}a:hover{text-decoration:underline}
header{border-bottom:1px solid var(--line);background:rgba(14,17,23,.92);position:sticky;top:0;z-index:5;backdrop-filter:blur(12px)}
.header-inner{max-width:1180px;margin:0 auto;padding:14px 20px;display:flex;gap:18px;align-items:center;justify-content:space-between}
.brand{font-weight:800;color:var(--text);letter-spacing:.02em}.brand span{color:var(--accent)}
nav{display:flex;gap:8px;flex-wrap:wrap}nav a{font-size:13px;color:var(--muted);padding:6px 9px;border:1px solid transparent;border-radius:999px}nav a:hover,nav a.active{border-color:var(--line);background:var(--panel2);color:var(--text);text-decoration:none}
main{max-width:1180px;margin:0 auto;padding:28px 20px 60px}.hero{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;align-items:stretch;margin-bottom:20px}.card{background:rgba(21,26,35,.9);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 10px 28px rgba(0,0,0,.22)}
h1{font-size:clamp(28px,4vw,44px);line-height:1.2;margin:0 0 12px}h2{font-size:24px;margin:32px 0 14px}h3{font-size:18px;margin:22px 0 10px}.lead{font-size:17px;color:var(--muted);margin:0}.muted{color:var(--muted);font-size:14px}.pill{display:inline-flex;align-items:center;gap:6px;background:#10221c;color:#b7f7dc;border:1px solid #1e4c3c;border-radius:999px;padding:4px 10px;font-size:12px;font-weight:700}
.tool-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.tool-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:18px;display:flex;flex-direction:column;gap:8px;min-height:160px}.tool-card:hover{border-color:#3c7f6a;text-decoration:none}.tool-card b{color:var(--text);font-size:18px}.tool-card p{color:var(--muted);margin:0}.tool-card span{margin-top:auto;color:var(--accent);font-weight:700;font-size:13px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:20px}.sidebar{position:sticky;top:84px;align-self:start}.toc{display:grid;gap:8px}.toc a{padding:8px 10px;background:var(--panel2);border:1px solid var(--line);border-radius:10px;color:var(--text);font-size:14px}.toc a:hover{text-decoration:none;border-color:#456}
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.full{grid-column:1/-1}label{display:block;color:var(--muted);font-size:13px;margin-bottom:5px}input,select,textarea{width:100%;background:#0b0f16;color:var(--text);border:1px solid var(--line);border-radius:10px;padding:10px 11px;font:inherit}textarea{min-height:90px;resize:vertical}input[type="checkbox"]{width:auto;margin-right:8px}.check{display:flex;align-items:center;padding:8px 0;color:var(--text)}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.btn{appearance:none;border:1px solid #347a62;background:#123c31;color:#dfffee;border-radius:11px;padding:10px 14px;font-weight:800;cursor:pointer}.btn:hover{background:#164a3c}.btn.secondary{border-color:var(--line);background:var(--panel2);color:var(--text)}.btn.warn{border-color:#715b1d;background:#392d10;color:#ffeab1}.small{font-size:12px;padding:6px 10px}
.output{background:var(--code);border:1px solid var(--line);border-radius:14px;padding:14px;white-space:pre-wrap;word-break:break-all;min-height:110px;font-family:"Consolas","Menlo",monospace;color:#e7f7ff}.note{border-left:4px solid var(--warn);background:#251e0e;padding:12px 14px;border-radius:10px;color:#ffeec2}.ok-note{border-left:4px solid var(--ok);background:#0d241d;padding:12px 14px;border-radius:10px;color:#c9ffeb}.danger-note{border-left:4px solid var(--danger);background:#2a1111;padding:12px 14px;border-radius:10px;color:#ffd1d1}.ad-slot{border:1px dashed #586174;background:rgba(255,255,255,.03);border-radius:14px;min-height:86px;display:flex;align-items:center;justify-content:center;color:#8e98aa;font-size:13px;text-align:center;margin:20px 0}.examples{display:grid;gap:10px}.example{background:var(--panel2);border:1px solid var(--line);border-radius:12px;padding:12px}.example code{color:#dfffee}
footer{border-top:1px solid var(--line);color:var(--muted);padding:28px 20px;text-align:center}.badge-list{display:flex;gap:8px;flex-wrap:wrap}.badge{border:1px solid var(--line);background:var(--panel2);border-radius:999px;padding:4px 9px;font-size:12px;color:var(--muted)}
@media (max-width:900px){.hero,.layout{grid-template-columns:1fr}.sidebar{position:static}.tool-grid{grid-template-columns:1fr 1fr}.header-inner{align-items:flex-start;flex-direction:column}.form-grid{grid-template-columns:1fr}}
@media (max-width:600px){.tool-grid{grid-template-columns:1fr}main{padding:20px 14px}.card{padding:17px}nav{max-height:120px;overflow:auto}}


/* Advertising and retro visitor counter */
.footer-inner{max-width:1180px;margin:0 auto;display:grid;gap:12px;place-items:center}
.footer-links{margin:0;color:var(--muted);font-size:13px}
.retro-counter{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:center;border:1px solid #3a4253;background:#101722;border-radius:12px;padding:10px 12px;box-shadow:inset 0 0 0 1px rgba(255,255,255,.03)}
.retro-counter .counter-title{font-weight:800;color:var(--accent);letter-spacing:.04em}
.retro-counter span{font-size:13px;color:var(--muted)}
.retro-counter b{display:inline-block;min-width:48px;text-align:right;font-family:"Consolas","Menlo",monospace;color:#f7fbff;background:#05070b;border:1px solid #2f3748;border-radius:6px;padding:2px 6px;margin-left:2px}
.retro-counter small{color:#7f8a9f;font-size:11px}
.ad-slot{position:relative}
.ad-slot::before{content:"PR";position:absolute;top:8px;left:10px;font-size:10px;color:#778195;border:1px solid #465064;border-radius:999px;padding:1px 6px;letter-spacing:.04em}
.ad-note{font-size:13px;color:var(--muted);border-left:3px solid var(--accent2);padding:8px 10px;background:rgba(96,165,250,.08);border-radius:8px}
.kv{display:grid;grid-template-columns:180px minmax(0,1fr);gap:8px;border-top:1px solid var(--line);padding-top:12px;margin-top:12px}.kv dt{color:var(--muted)}.kv dd{margin:0}
@media (max-width:600px){.kv{grid-template-columns:1fr}.retro-counter{align-items:stretch}.retro-counter span{width:100%;display:flex;justify-content:space-between}}

.notice{border:1px solid rgba(120,120,120,.35);border-radius:12px;padding:12px 14px;margin:14px 0;background:rgba(255,255,255,.06)}
.notice.warn{border-color:rgba(255,180,80,.7);background:rgba(255,180,80,.10)}
.check-list li{margin:.55em 0}
.launch-status{border-color:rgba(100,180,255,.35)}
table{width:100%;border-collapse:collapse;margin:16px 0}td,th{border:1px solid rgba(160,160,160,.25);padding:9px 10px;text-align:left}th{background:rgba(255,255,255,.06)}
pre{white-space:pre-wrap;overflow:auto;background:rgba(0,0,0,.25);padding:14px;border-radius:12px}
.import-card{border-color:#264154;background:linear-gradient(180deg,#101825,#0f1623)}
.import-text{min-height:76px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:13px}
.btn.ghost{border-color:var(--line);background:transparent;color:var(--muted)}
.btn.ghost:hover{background:#121a27;color:var(--text)}

/* UX upgrades: organized command forms, saved commands, settings */
.field{min-width:0}.field-section{border:1px solid var(--line);border-radius:16px;padding:16px;margin:14px 0;background:rgba(255,255,255,.025)}
.field-section legend{padding:0 8px;color:var(--accent);font-weight:800;font-size:14px;letter-spacing:.03em}.output-card,.saved-card{margin-top:18px}.output-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;flex-wrap:wrap}.output-head h2{margin:0 0 12px}.output-actions input{background:#0b0f16}.saved-card summary{cursor:pointer;color:var(--accent);font-weight:700}.import-card,.output-card,.saved-card{scroll-margin-top:90px}.output:focus{outline:2px solid rgba(71,216,164,.55);outline-offset:3px}.utility-link{border-color:#3c4b65!important;background:#101826!important}.settings-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}@media(max-width:700px){.settings-grid{grid-template-columns:1fr}.output-actions input{max-width:none!important;width:100%}}

.language-switch{display:flex;gap:8px;align-items:center;justify-content:flex-end;margin:10px 0 0}
.lang-pill{display:inline-block;padding:7px 10px;border-radius:999px;border:1px solid #d4d4d8;background:#fff;color:#334155;font-size:13px;text-decoration:none}
.lang-pill.active{background:#0f172a;color:#fff;border-color:#0f172a}
@media(max-width:760px){.language-switch{justify-content:flex-start;flex-wrap:wrap}.lang-pill{font-size:12px}}