:root{--bg: #f5f4f0;--card: #ffffff;--ink: #23201b;--muted: #6b655c;--accent: #4a5d4e;--accent-ink: #ffffff;--error: #a8342b;--line: #e4e0d8}*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--ink)}.topbar{display:flex;align-items:center;justify-content:space-between;padding:1rem 1.25rem;border-bottom:1px solid var(--line);background:var(--card)}.brand{font-weight:600;letter-spacing:.02em}.content{max-width:28rem;margin:2.5rem auto;padding:0 1rem}.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:1.75rem;display:flex;flex-direction:column;gap:1rem}h1{font-size:1.35rem;margin:0}label{display:flex;flex-direction:column;gap:.35rem;font-size:.9rem;color:var(--muted)}input{padding:.6rem .7rem;border:1px solid var(--line);border-radius:8px;font-size:1rem;color:var(--ink)}button{padding:.65rem 1rem;border:none;border-radius:8px;background:var(--accent);color:var(--accent-ink);font-size:1rem;cursor:pointer}button:disabled{opacity:.6;cursor:default}.linkbtn{background:none;color:var(--accent);padding:0;font-size:.9rem}.muted{color:var(--muted);font-size:.9rem;margin:0}.error{color:var(--error);font-size:.9rem;margin:0}.notice{background:#fbf6e9;border:1px solid #ecdcae;border-radius:8px;padding:.75rem;font-size:.9rem;margin:0}.profile{display:grid;grid-template-columns:8rem 1fr;row-gap:.5rem;margin:0}.profile dt{color:var(--muted);font-size:.9rem}.profile dd{margin:0}