:root{color-scheme:dark;--bg:#101419;--panel:#1b232d;--line:#34414e;--text:#eef4f7;--muted:#b2c1cf;--accent:#a9edb1;--warn:#ffe1a3}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,sans-serif;line-height:1.55}main{max-width:740px;margin:auto;padding:28px 22px 38px}header{display:flex;justify-content:space-between;gap:12px;align-items:center}.brand{font-size:15px;letter-spacing:.12em;font-weight:800}.tag{font-size:12px;background:var(--panel);color:var(--muted);padding:6px 12px;border-radius:20px}h1{font-size:clamp(28px,5.2vw,42px);line-height:1.15;letter-spacing:-.025em;margin:30px 0 16px}h2{font-size:23px;margin:0 0 14px}h3{font-size:18px}p{margin:10px 0}.intro p,footer,.muted{color:var(--muted)}.order,#content{background:var(--panel);padding:22px;border:1px solid var(--line);border-radius:18px;margin:22px 0}.order{border-left:4px solid var(--accent)}.order p{font-size:14px}button,.button{display:block;width:100%;text-align:center;padding:14px 18px;margin:10px 0;border:0;border-radius:11px;font-size:16px;font-weight:650;line-height:1.35;cursor:pointer;background:var(--accent);color:#101a12;text-decoration:none}button:disabled{opacity:.55;cursor:wait}.secondary{background:#26313e;color:var(--text);border:1px solid var(--line)}nav{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}nav button{font-size:14px;padding:12px 6px}label{display:block;margin:16px 0 8px}input[type=checkbox]{width:20px;height:20px;vertical-align:middle;margin-right:8px}input[type=file],textarea,select{width:100%;background:#111922;border:1px solid var(--line);border-radius:9px;padding:12px;color:var(--text);font:inherit}textarea{min-height:140px;resize:vertical}.notice,#alert{padding:16px;background:#332b20;border:1px solid #6e5837;color:var(--warn);border-radius:11px;margin:16px 0}.code{font-size:29px;letter-spacing:.1em;font-family:ui-monospace,monospace;background:#111922;padding:14px;text-align:center;border-radius:9px}ol,ul{padding-left:22px}li{margin:8px 0}.result{font-weight:700;font-size:19px}.small{font-size:13px}.danger{background:#553131;color:#ffdad6}footer{font-size:12px;text-align:center;margin-top:24px}@media(max-width:420px){main{padding:18px 14px}header{align-items:flex-start}.tag{font-size:10px}.order,#content{padding:18px}nav{grid-template-columns:repeat(2,1fr)}}