:root{--bg:#f5f6f8;--card:#fff;--ink:#1e1f22;--muted:#74777d;--line:#e6e8eb;--accent:#15171a;--ok:#16794a;--warn:#a56600;--danger:#b42318}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;background:var(--bg);color:var(--ink)}
.wrap{max-width:560px;margin:0 auto;padding:18px 16px 90px}
.wrap.wide{max-width:1100px}
h1,h2,h3{line-height:1.25} h1{font-size:26px} h2{font-size:22px}
.card{background:var(--card);border-radius:18px;padding:18px;margin:14px 0;border:1px solid #eef0f2;box-shadow:0 6px 24px rgba(0,0,0,.035)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;width:100%;border:0;border-radius:14px;padding:15px 17px;background:var(--accent);color:#fff;text-decoration:none;font-weight:700;font-size:16px;cursor:pointer}
.btn.secondary{background:#eceef1;color:#222}.btn.danger{background:var(--danger)}.btn.small{width:auto;padding:9px 12px;font-size:14px}
.muted{color:var(--muted)}.big{font-size:38px;font-weight:800}.pill{display:inline-block;border-radius:999px;background:#eef0f2;padding:5px 10px;font-size:13px}
.ok{color:var(--ok)}.warn{color:var(--warn)}.danger{color:var(--danger)}
.grid{display:grid;gap:12px}.grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
label{display:block;font-weight:700;margin:15px 0 7px}
input,select,textarea{width:100%;padding:13px;border:1px solid #d9dde2;border-radius:12px;background:#fff;font:inherit}
table{width:100%;border-collapse:collapse;background:#fff}th,td{padding:10px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
.nav{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0}.nav a{text-decoration:none;color:#222;background:#fff;border:1px solid var(--line);padding:9px 12px;border-radius:10px}
.timer{font-size:46px;font-weight:800;letter-spacing:1px}
.notice{padding:12px 14px;border-radius:12px;background:#fff5d9}
@media(max-width:640px){.grid.two{grid-template-columns:1fr}.wide table{font-size:12px;display:block;overflow:auto}}