/* Membership upgrade dialog (.plus-upgrade, injected by plus-upgrade.js / username-notice.js) */
.plus-upgrade{box-sizing:border-box;width:min(680px,calc(100vw - 32px));max-height:90dvh;overflow:auto;scrollbar-width:none;padding:36px;border:1px solid var(--line);border-radius:var(--radius-l);background:var(--surface);color:var(--text);box-shadow:var(--shadow);font-family:var(--font-body)}
.plus-upgrade::-webkit-scrollbar{display:none}
.plus-upgrade[open]{animation:upgrade-in .3s ease-out}
.plus-upgrade::backdrop{background:rgba(13,15,20,.55);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.upgrade-close{position:absolute;right:16px;top:16px;display:grid;place-items:center;width:34px;height:34px;padding:0;border:0;border-radius:999px;background:var(--surface-2);color:var(--muted);font-size:22px;line-height:1;cursor:pointer;transition:background .15s ease,color .15s ease}
.upgrade-close:hover{background:var(--surface-3);color:var(--text)}
.upgrade-label{display:inline-block;font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--accent-text)}
.plus-upgrade h2{margin:14px 0 12px;font-size:clamp(28px,4vw,38px);line-height:1.02;letter-spacing:-.04em}
.plus-upgrade p{margin:0;color:var(--muted);font-size:14px;line-height:1.6}
.upgrade-reason{font-size:15px}
.upgrade-reason:empty{display:none}
.new-login-name{display:block;margin:16px 0;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius-s);background:var(--surface-2);font-family:var(--font-mono);font-size:16px;font-weight:700;letter-spacing:.02em;overflow-wrap:anywhere}
.upgrade-benefits{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:24px 0}
.upgrade-benefits div{display:flex;gap:9px;font-size:13px;line-height:1.5}
.upgrade-benefits span{color:var(--accent-text)}
.upgrade-plans{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:24px 0 18px}
.upgrade-plans section{padding:22px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-2)}
.upgrade-plans .upgrade-premium{border-color:var(--warn);background:var(--warn-soft)}
.upgrade-premium .upgrade-label{color:var(--warn)}
.upgrade-plans h3{margin:12px 0 18px;font-size:18px;letter-spacing:-.02em}
.upgrade-plans strong{display:block;font-family:var(--font-display);font-size:30px;font-weight:700;letter-spacing:-.04em;line-height:1}
.upgrade-plans small{display:block;margin-top:6px;color:var(--muted);font-family:var(--font-mono);font-size:11px;font-weight:600;letter-spacing:.08em;text-transform:uppercase}
.upgrade-plans ul{list-style:none;padding:0;margin:18px 0 0;display:grid;gap:10px;font-size:13px;line-height:1.5}
.upgrade-plans li:before{content:'✓';margin-right:8px;color:var(--accent-text);font-weight:700}
.upgrade-premium li:before{color:var(--warn)}
.upgrade-shared{margin:18px 0 22px;color:var(--muted);text-align:center;font-size:13px;line-height:1.6}
.upgrade-cta{display:flex;align-items:center;justify-content:center;gap:10px;width:100%;min-height:50px;padding:0 24px;border:0;border-radius:999px;background:var(--ink);color:var(--ink-text);font-size:15px;font-weight:600;text-decoration:none;cursor:pointer;transition:opacity .15s ease}
.upgrade-cta:hover{opacity:.86}
button.upgrade-cta{margin-top:20px}
.upgrade-foot{margin:14px 0 0;color:var(--faint);text-align:center;font-size:12px}
@keyframes upgrade-in{from{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){.plus-upgrade[open]{animation:none}}
@media(max-width:480px){.plus-upgrade{padding:26px 20px}.upgrade-benefits,.upgrade-plans{grid-template-columns:1fr;gap:10px}.upgrade-plans section{padding:18px}.plus-upgrade h2{font-size:28px}}