:root{--brand-orange:#e0823c;--brand-blue:#6fa8c7;--brand-ink:#1f2937;--brand-muted:#6b7280;--brand-border:#e5e7eb;--brand-bg-soft:#f7f8fa;--brand-primary:#ea580c;--brand-primary-hover:#c2410c}*,:before,:after{box-sizing:border-box}html,body{margin:0;padding:0}body{color:var(--brand-ink);-webkit-text-size-adjust:100%;background:#fff;font-family:system-ui,-apple-system,Segoe UI,Roboto,Hiragino Kaku Gothic ProN,Noto Sans JP,Meiryo,sans-serif;line-height:1.6}.brand-btn{color:#fff;background:var(--brand-primary);cursor:pointer;border:none;border-radius:.6rem;justify-content:center;align-items:center;gap:.4rem;padding:.7rem 1.2rem;font-size:1rem;font-weight:600;transition:background .15s,opacity .15s;display:inline-flex}.brand-btn:hover:not(:disabled){background:var(--brand-primary-hover)}.brand-btn:disabled{opacity:.55;cursor:default}.login-screen{background:var(--brand-bg-soft);justify-content:center;align-items:center;min-height:100vh;padding:1.5rem;display:flex}.login-card{border:1px solid var(--brand-border);background:#fff;border-radius:1rem;width:100%;max-width:380px;padding:2rem 1.75rem;box-shadow:0 10px 30px #1f293714}.login-logo{width:132px;height:auto;margin:0 auto 1.25rem;display:block}.login-title{text-align:center;color:var(--brand-ink);margin:0 0 1.5rem;font-size:1.15rem}.login-field{color:var(--brand-muted);margin-bottom:1rem;font-size:.9rem;display:block}.login-input{width:100%;color:var(--brand-ink);border:1px solid var(--brand-border);background:#fff;border-radius:.5rem;margin-top:.35rem;padding:.6rem .7rem;font-size:1rem;display:block}.login-input:focus{outline:2px solid var(--brand-blue);outline-offset:1px;border-color:var(--brand-blue)}.login-error{color:#b91c1c;margin:.75rem 0 0;font-size:.85rem}.admin-sidebar-wrap{border-right:1px solid var(--brand-border);background:var(--brand-bg-soft);flex-shrink:0;width:220px}.admin-nav{padding:.75rem .5rem}.admin-nav ul{flex-direction:column;gap:.25rem;margin:0;padding:0;list-style:none;display:flex}.admin-nav a{color:#374151;border-radius:.5rem;padding:.55rem .75rem;font-size:.95rem;text-decoration:none;display:block}.admin-nav a:hover{background:#1f29370d}.admin-nav a[aria-current=page]{background:var(--brand-primary);color:#fff;font-weight:600}.admin-hamburger{border:1px solid var(--brand-border);color:var(--brand-ink);cursor:pointer;background:#fff;border-radius:.5rem;margin:.6rem .75rem;padding:.5rem .9rem;font-size:.95rem;display:none}.admin-main{padding:1.5rem}@media (max-width:768px){.admin-body{flex-direction:column}.admin-sidebar-wrap{border-right:none;border-bottom:1px solid var(--brand-border);z-index:50;width:100%;position:relative}.admin-hamburger{align-items:center;gap:.4rem;display:inline-flex}.admin-nav{border-bottom:1px solid var(--brand-border);background:#fff;max-height:70vh;position:absolute;top:100%;left:0;right:0;overflow-y:auto;box-shadow:0 10px 24px #1f293729}.admin-nav[data-open=false]{display:none}.admin-main{padding:1rem}}