:root{--ink:#1d2925;--muted:#68746f;--line:#d9dfdc;--paper:#f5f7f5;--green:#236346;--green-dark:#174832;--danger:#a33b35;font-family:"Yu Gothic UI","Hiragino Sans","Noto Sans JP",Meiryo,sans-serif;color:var(--ink);background:var(--paper);font-size:16px;line-height:1.7}
*{box-sizing:border-box}
body{margin:0;background:var(--paper)}
header{display:flex;align-items:center;gap:20px;padding:16px max(16px,5vw);background:#fff;border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;text-decoration:none;color:var(--green)}
.mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:8px;background:var(--green);color:#fff;font-size:18px}
.tagline{font-size:13px;color:var(--muted)}
.logout{margin-left:auto}
main{max-width:860px;margin:32px auto;padding:0 16px}
h1{font-size:26px;margin:0 0 12px}
h2{font-size:18px;margin:0 0 8px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:24px;margin:0 0 18px}
.card.narrow{max-width:460px;margin:24px auto}
.eyebrow{margin:0 0 4px;color:var(--green);font-size:12px;font-weight:700;letter-spacing:.08em}
label{display:block;margin:0 0 14px;font-weight:600;font-size:14px}
input{display:block;width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font:inherit;font-weight:400}
input:focus{outline:2px solid var(--green);outline-offset:1px}
button{padding:10px 20px;border:0;border-radius:8px;background:var(--green);color:#fff;font:inherit;font-weight:700;cursor:pointer}
button:hover{background:var(--green-dark)}
button.quiet{background:#e9ece8;color:var(--ink)}
button.quiet:hover{background:#dde2dc}
.message{padding:12px 16px;border-radius:8px}
.message.error{background:#fdecea;color:var(--danger)}
.message.notice{background:#e9f3ec;color:var(--green-dark)}
.muted{color:var(--muted);font-size:14px}
.links{padding-left:20px}
.links li{margin:6px 0}
.links a{color:var(--green);font-weight:600}
form.inline{display:flex;gap:8px;align-items:center;margin:10px 0 0;flex-wrap:wrap}
form.inline input{width:auto;flex:1;min-width:200px;margin:0}
footer{text-align:center;color:var(--muted);font-size:12px;padding:24px 16px}
@media (max-width:600px){.tagline{display:none}.card{padding:18px}}