:root{--bg:#f5f7fa;--card:#fff;--text:#1c2330;--muted:#5b6677;--border:#e2e8f0;--primary:#2f7d4f;--x:#000;--fb:#1877f2;--google:#4285f4;--apple:#000;--warn-bg:#fff7ed;--warn-border:#fdba74;--error:#c0392b;--success:#2f7d4f}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font-family:system-ui,-apple-system,Hiragino Sans,Noto Sans JP,sans-serif;line-height:1.6}.header{background:var(--card);border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:12px 20px;display:flex}.brand{color:var(--primary);font-size:18px;font-weight:700}.lang-switch{gap:4px;display:flex}.lang{border:1px solid var(--border);background:var(--card);color:var(--muted);cursor:pointer;border-radius:6px;padding:4px 10px;font-size:13px}.lang--active{background:var(--primary);color:#fff;border-color:var(--primary)}.container{max-width:560px;margin:0 auto;padding:24px 16px 64px}.card{background:var(--card);border:1px solid var(--border);border-radius:12px;margin-bottom:16px;padding:20px 22px}.card--warning{background:var(--warn-bg);border-color:var(--warn-border)}.title{margin:0 0 12px;font-size:20px}.subtitle{margin:18px 0 10px;font-size:16px}.subtitle--sm{font-size:14px}.body{color:var(--text);margin:0 0 8px}.note{color:var(--muted);margin:0 0 12px;font-size:14px}.actions{flex-direction:column;gap:10px;display:flex}.actions--end{align-items:flex-end;margin-top:8px}.btn{appearance:none;color:#fff;cursor:pointer;border:none;border-radius:8px;padding:11px 16px;font-size:15px;font-weight:600;transition:opacity .15s}.btn:hover{opacity:.9}.btn--x{background:var(--x)}.btn--fb{background:var(--fb)}.btn--google{background:var(--google)}.btn--apple{background:var(--apple)}.btn--email{background:var(--primary)}.btn--ghost{color:var(--muted);border:1px solid var(--border);background:0 0}.link-row{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;gap:12px;padding:10px 0;display:flex}.link-row:last-of-type{border-bottom:none}.link-row__name{margin-right:auto;font-weight:600}.badge{color:var(--success);font-size:14px;font-weight:600}.email-block{flex-direction:column;gap:8px;padding-top:12px;display:flex}.input{border:1px solid var(--border);border-radius:8px;width:100%;padding:10px 12px;font-size:15px}.info-line{border-bottom:1px dashed var(--border);gap:10px;padding:6px 0;display:flex}.info-line:last-child{border-bottom:none}.info-line__label{color:var(--muted);flex:0 0 130px;font-size:14px}.info-line__value{word-break:break-all;font-size:14px}.message{font-size:14px}.message:empty{display:none}.message--error,.message--success,.profile__error{border:1px solid #0000;border-radius:8px;padding:12px 14px}.message--error,.message--success{margin-bottom:16px}.message--error,.profile__error{color:var(--error);border-color:var(--error);background:#fdecea}.message--success{color:var(--success);border-color:var(--success);background:#eaf5ee}.auth-loading{z-index:1000;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);background:#f5f7fad9;flex-direction:column;justify-content:center;align-items:center;gap:14px;display:flex;position:fixed;inset:0}.spinner{border:4px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:38px;height:38px;animation:.8s linear infinite spin}.auth-loading__text{color:var(--muted);margin:0;font-size:14px}@keyframes spin{to{transform:rotate(360deg)}}@media (prefers-reduced-motion:reduce){.spinner{animation-duration:2.4s}}@keyframes skeleton-pulse{0%,to{opacity:1}50%{opacity:.45}}.skeleton{background:var(--border);animation:1.2s ease-in-out infinite skeleton-pulse;color:#0000!important}.profile__avatar-slot.skeleton{border-radius:50%}.profile__avatar-slot.skeleton>*{visibility:hidden}.profile__name.skeleton{border-radius:6px;min-width:140px;min-height:1.2em}@media (prefers-reduced-motion:reduce){.skeleton{animation:none}}.profile{align-items:center;gap:14px;margin-bottom:8px;display:flex}.profile__avatar-slot{flex:none;width:56px;height:56px}.avatar{object-fit:cover;background:var(--border);border-radius:50%;flex:none;width:56px;height:56px}.avatar--placeholder{color:var(--muted);justify-content:center;align-items:center;font-size:22px;font-weight:700;display:flex}.profile__name{font-size:18px;font-weight:700}.profile__error{margin-top:12px;font-size:13px}.profile__introduction{margin-top:12px}.profile__introduction-body{white-space:pre-wrap;overflow-wrap:anywhere;margin:2px 0 0;font-size:13px}.uid-note{color:var(--muted);opacity:.6;word-break:break-all;margin-top:14px;font-size:11px}.provider-row{border-bottom:1px solid var(--border);padding:10px 0}.provider-row:last-child{border-bottom:none}.provider-row .link-row{border-bottom:none;padding:0}.provider-email,.provider-username{color:var(--muted);overflow-wrap:anywhere;margin-top:4px;font-size:12px}.btn--unlink{color:var(--error);border-color:var(--error);padding:6px 12px;font-size:13px}.card--guidance{border-color:var(--primary);background:#f0f7f2}