.auth-checking body{visibility:hidden}.auth-checking:before{content:'ログイン状態を確認しています…';display:block;padding:48px;color:#335469;font:16px sans-serif}header .system-brand{font-size:18px;font-weight:700;text-decoration:none;color:#183c51}header nav{display:flex;gap:20px}header #identity{margin-left:auto}header{flex-wrap:wrap;gap:18px}.login-page{min-height:100vh;display:grid;place-items:center;background:linear-gradient(135deg,#e8f3f5,#f6f8fb);padding:24px}.login-card{width:min(100%,440px);margin:0;background:#fff;border:1px solid #dbe6ec;border-radius:20px;padding:40px;box-shadow:0 18px 60px #244b6210}.login-card h1{font-size:28px;margin:14px 0}.school-brand{font-weight:700;color:#287c8b}.login-card p{line-height:1.8;color:#566d7c}.login-card label{display:grid;gap:8px;margin-top:20px}.login-card input{width:100%;padding:13px}.login-card button{width:100%;padding:14px;font-size:16px}.login-help{font-size:12px;border-top:1px solid #e0e9ef;padding-top:20px}.login-card #login-error{color:#b32838;font-size:14px}.login-card *{box-sizing:border-box}@media(max-width:600px){.login-card{padding:26px}header #identity{margin-left:0}header nav{gap:12px}}