:root{color-scheme:light;--ink:#14243b;--muted:#536277;--blue:#245cdd;--paper:#f5f7fb;--line:#dce3ed;--danger:#b42318;--white:#fff}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI","Microsoft YaHei",sans-serif}main{max-width:880px;margin:0 auto;padding:0 32px}button,input{font:inherit}button{min-height:46px;padding:10px 18px;border:1px solid transparent;border-radius:8px;font-weight:600;cursor:pointer;transition:background .15s}button:disabled{opacity:.65;cursor:wait}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid var(--blue);outline-offset:4px}button.primary{background:var(--blue);color:var(--white)}button.primary:hover{background:#194abe}.secondary{background:var(--white);border-color:var(--line)}.secondary:hover,.quiet:hover{background:#e9eef8}.quiet{background:transparent;color:var(--muted);border-color:var(--line)}[hidden]{display:none!important}.masthead{height:96px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:12px}.wordmark{display:flex;align-items:center;gap:10px;color:var(--ink);text-decoration:none;font-size:17px;font-weight:700}.mark{background:var(--ink);color:var(--white);height:32px;width:32px;display:grid;place-items:center;border-radius:7px}.private-label{font-size:13px;color:var(--muted)}.login-panel{max-width:440px;margin:72px auto 80px}.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--blue);font-weight:700;margin:0 0 16px}h1{font-size:40px;line-height:1.3;letter-spacing:-.025em;margin:0 0 22px}p{margin:0}.intro{color:var(--muted);margin-bottom:32px}label{display:block;font-weight:600;margin-bottom:8px}input{width:100%;background:var(--white);border:1px solid #a9b8cd;border-radius:8px;min-height:50px;padding:10px 14px}.error{color:var(--danger);font-size:14px;min-height:26px;margin:7px 0 13px}.login-panel button{width:100%;display:flex;justify-content:space-between}.footnote{font-size:13px;color:var(--muted);margin-top:24px}footer{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding:24px 0 32px}.inbox-heading{display:flex;align-items:center;justify-content:space-between;gap:20px;margin:48px 0 28px}.inbox-heading h1{font-size:32px;margin:0}.inbox-heading .eyebrow{margin-bottom:8px}.toolbar{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 20px;background:var(--white);border:1px solid var(--line);border-radius:10px}#refresh-status{font-size:14px;font-weight:600}.muted{color:var(--muted);font-size:12px;margin-top:3px}.retention-note{font-size:12px;color:var(--muted);margin:16px 0 24px}.message{border:1px solid var(--line);border-radius:12px;background:var(--white);padding:24px;margin-bottom:16px;overflow-wrap:anywhere}.message-head{display:flex;justify-content:space-between;gap:16px;font-size:14px}.sender{font-weight:700}.time{font-size:12px;color:var(--muted);text-align:right}.codes{display:flex;flex-wrap:wrap;gap:12px;margin:20px 0}.code-group{display:flex;align-items:center;gap:16px;padding:10px 14px;background:#f0f4ff;border-radius:8px;border:1px solid #d7e3ff}.code{font:600 26px/1.4 ui-monospace,Consolas,monospace;letter-spacing:.08em;user-select:all}.copy{color:var(--blue);background:var(--white);border:1px solid #c6d5f2;padding:7px 12px;font-size:13px}.body{white-space:pre-wrap;color:#344358;font-size:14px;line-height:1.8;margin-top:12px}.remaining{font-size:12px;color:var(--muted);border-top:1px solid var(--line);padding-top:14px;margin-top:20px}.empty{text-align:center;padding:44px 16px 64px}.empty-mark{color:#9aabc0;font-size:38px}h2{font-size:18px;font-weight:600;margin:12px 0}.empty p{font-size:14px;color:var(--muted)}.copy-status{font-size:14px;color:var(--blue);min-height:30px;margin:16px 0}#inbox-view{min-height:480px}
@media(max-width:600px){main{padding:0 20px}.masthead{height:76px}.login-panel{margin:48px auto 60px}h1{font-size:34px}.inbox-heading{margin:32px 0 24px}.inbox-heading h1{font-size:28px}.toolbar{padding:16px;gap:8px}.toolbar button{padding:8px 12px;font-size:14px}.message{padding:18px}.message-head{gap:10px}.time{max-width:150px}.code-group{gap:12px}.code{font-size:24px}.private-label{font-size:12px}.retention-note{line-height:1.8}}
@media(prefers-reduced-motion:reduce){button{transition:none}}