*{box-sizing:border-box}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;margin:0;background:#f7f7fb;color:#222}
.container{max-width:960px;margin:0 auto;padding:16px}
.site-header,.site-footer{background:#fff;border-bottom:1px solid #eee}
.site-footer{border-top:1px solid #eee;border-bottom:none;margin-top:40px}
.brand{font-weight:700}
nav a{margin-right:12px;text-decoration:none;color:#2563eb}
nav .logout{color:#b91c1c}
.card{background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:16px;margin:16px 0;box-shadow:0 1px 2px rgba(0,0,0,.04)}
input[type=text],input[type=email],input[type=password]{width:100%;padding:10px;border:1px solid #d1d5db;border-radius:8px}
button, .btn{display:inline-block;background:#2563eb;color:#fff;border:none;border-radius:8px;padding:10px 16px;cursor:pointer}
.btn-secondary{background:#6b7280}
.table{width:100%;border-collapse:collapse}
.table th,.table td{border-bottom:1px solid #eee;padding:10px;text-align:left}
.notice{padding:10px;border-radius:8px;background:#ecfeff;border:1px solid #a5f3fc;margin:10px 0}
.error{padding:10px;border-radius:8px;background:#fee2e2;border:1px solid #fecaca;margin:10px 0}
small.mono{font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;color:#555}