:root{--bg:#f6f4ef;--surface:#fff;--ink:#171717;--muted:#666;--line:#e7e2d8;--accent:#171717;--card-radius:22px;--btn-radius:14px}*{box-sizing:border-box}body{margin:0;font-family:Inter,Arial,sans-serif;background:var(--bg);color:var(--ink)}a{color:inherit;text-decoration:none}.landing{min-height:100vh}.login-link{position:fixed;top:22px;right:26px;border:1px solid var(--ink);border-radius:999px;padding:10px 18px;background:#fff}.center-brand{min-height:100vh;display:grid;place-items:center;font-size:clamp(54px,10vw,150px);font-weight:900;letter-spacing:-.08em}.auth{min-height:100vh;display:grid;place-items:center;padding:24px}.shell{display:grid;grid-template-columns:260px 1fr;min-height:100vh}aside{background:#111;color:white;padding:24px;position:sticky;top:0;height:100vh;display:flex;flex-direction:column;gap:8px}aside .brand{font-weight:900;font-size:22px;margin-bottom:22px;letter-spacing:-.04em}aside a{padding:11px 12px;border-radius:12px;color:#f1f1f1}aside a.active,aside a:hover{background:#2a2a2a}main{padding:28px;max-width:1380px;width:100%}h1{font-size:34px;letter-spacing:-.04em;margin:0 0 22px}h2{margin-top:0}.grid.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.two{display:grid;grid-template-columns:minmax(320px,520px) 1fr;gap:18px;align-items:start}.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--card-radius);padding:20px;margin-bottom:18px;box-shadow:0 8px 30px rgba(0,0,0,.04)}.narrow{max-width:420px;width:100%}label{display:block;font-weight:700;margin:12px 0 8px}input,select,textarea{width:100%;padding:12px 13px;border:1px solid var(--line);border-radius:12px;background:#fff;font:inherit;margin-top:6px}button{height:42px;border:0;border-radius:var(--btn-radius);background:var(--accent);color:#fff;padding:0 18px;font-weight:800;cursor:pointer;margin-top:12px}.alert{background:#ffe8e5;border:1px solid #ffb4aa;padding:12px;border-radius:12px}.notice{background:#eaf8ed;border:1px solid #bfe8c7;padding:12px 14px;border-radius:14px;margin-top:0}.check{display:flex;gap:10px;align-items:center;font-weight:500}.check input{width:auto;margin:0}fieldset{border:1px solid var(--line);border-radius:16px;padding:12px;margin:14px 0}details{border-top:1px solid var(--line);padding:12px 0}summary{cursor:pointer;font-weight:800}small{color:var(--muted);font-weight:500}code,pre{background:#f4f1eb;border-radius:10px;padding:2px 6px}pre{padding:14px;overflow:auto;white-space:pre-wrap}ul{margin-top:8px}@media(max-width:900px){.shell{grid-template-columns:1fr}aside{height:auto;position:relative}.grid.cards,.two{grid-template-columns:1fr}main{padding:18px}}