:root{color-scheme:light;--ink:#17172b;--muted:#6d6b80;--violet:#7357ff;--pink:#ff4f9a;--cyan:#23b8ff;--line:#e9e5f5;--soft:#f4f0ff;font-family:Inter,"Noto Sans JP","Hiragino Kaku Gothic ProN",system-ui,sans-serif}*{box-sizing:border-box}body{min-height:100vh;margin:0;color:var(--ink);background:radial-gradient(circle at 70% 0,#eee8ff 0,transparent 36%),#f8f7fc}.auth-top{padding:18px max(20px,env(safe-area-inset-left));display:flex;justify-content:space-between;align-items:center;gap:16px}.auth-brand{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-weight:950;letter-spacing:.08em}.auth-brand img{border-radius:12px}.auth-actions{display:flex;align-items:center;justify-content:flex-end;gap:12px}.auth-language{min-height:42px;padding:8px 10px;border:1px solid var(--line);border-radius:12px;background:#fff;color:var(--ink);font:inherit;font-weight:750}.back-link{color:#5140ba;text-decoration:none;font-weight:800}.auth-main{width:min(100% - 32px,520px);margin:46px auto 90px}.auth-card{padding:clamp(24px,7vw,44px);border:1px solid var(--line);border-radius:28px;background:#fff;box-shadow:0 24px 70px #30236616}.eyebrow{margin:0 0 10px;color:var(--violet);font-size:11px;font-weight:900;letter-spacing:.16em}h1{margin:0;font-size:clamp(32px,8vw,52px);letter-spacing:-.05em}p{color:var(--muted);line-height:1.8}.auth-form{display:grid;gap:14px;margin-top:26px}.auth-form label{display:grid;gap:7px;font-size:12px;font-weight:800}.auth-form input{width:100%;padding:14px 15px;border:1px solid var(--line);border-radius:13px;font:inherit;outline:none}.auth-form input:focus{border-color:var(--violet);box-shadow:0 0 0 4px var(--soft)}.auth-button,.ghost-button{min-height:52px;padding:13px 18px;border:0;border-radius:13px;font:inherit;font-weight:900;cursor:pointer}.auth-button{color:#fff;background:linear-gradient(105deg,var(--pink),var(--violet),var(--cyan))}.ghost-button{color:#5140ba;background:var(--soft)}.member-login-link.disabled{pointer-events:none;opacity:.55}.member-login-link{display:flex;align-items:center;justify-content:center;margin-top:13px;text-align:center;text-decoration:none}.auth-button:disabled{cursor:wait;opacity:.55}.auth-status{min-height:24px;margin:4px 0 0;color:#b42318;font-size:12px}.member-grid{display:grid;gap:12px;margin-top:26px}.member-option{padding:18px;border:1px solid var(--line);border-radius:17px}.member-option strong,.member-option span{display:block}.member-option span{margin-top:6px;color:var(--muted);font-size:12px;line-height:1.6}.member-option a{display:inline-block;margin-top:13px;color:#5140ba;font-weight:850;text-decoration:none}.notice{margin-top:18px;padding:14px;border-radius:14px;background:var(--soft);font-size:12px}.seller-shell{width:min(100% - 32px,1080px);margin:20px auto 80px}.seller-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.seller-panel{padding:24px;border:1px solid var(--line);border-radius:22px;background:#fff}.seller-panel strong{display:block;font-size:30px}.seller-panel span{color:var(--muted);font-size:12px}@media(max-width:700px){.auth-top{align-items:flex-start}.auth-actions{align-items:flex-end;flex-direction:column}.auth-main{margin-top:20px}.seller-grid{grid-template-columns:1fr}}