:root{--paper:#f6f6f2;--card:#fff;--ink:#1a1c22;--muted:#6d7280;--line:#e3e3dc;--post-blue:#2c55c9;--post-blue-dark:#21409a;--post-red:#d8442e;--radius:12px;--mono:ui-monospace,"SF Mono",SFMono-Regular,Menlo,Consolas,monospace;--sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.5;-webkit-font-smoothing:antialiased}.airmail{height:8px;background:repeating-linear-gradient(-45deg,var(--post-red) 0 14px,#fff 14px 28px,var(--post-blue) 28px 42px,#fff 42px 56px)}.shell{max-width:640px;margin:0 auto;padding:20px 16px 64px}header.topbar{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:24px}.wordmark{font-weight:800;letter-spacing:-.03em;font-size:22px;text-decoration:none;color:var(--ink)}.wordmark span{color:var(--post-blue)}nav.mainnav{display:flex;gap:14px}nav.mainnav a,nav.mainnav button{font-family:var(--mono);font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);text-decoration:none;background:none;border:none;padding:0;cursor:pointer}nav.mainnav a.active,nav.mainnav a:hover,nav.mainnav button:hover{color:var(--ink)}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:16px}label.field-label{display:block;font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:0 0 6px}input[type=password],input[type=text],select,textarea{width:100%;font:inherit;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:8px;padding:12px;outline:none}input:focus,select:focus,textarea:focus{border-color:var(--post-blue);box-shadow:0 0 0 3px rgba(44,85,201,.15)}textarea{resize:vertical;min-height:96px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font:inherit;font-weight:600;border:none;border-radius:8px;padding:12px 18px;cursor:pointer;text-decoration:none;transition:background .15s ease;min-height:46px}.btn-primary{background:var(--post-blue);color:#fff;width:100%}.btn-primary:hover{background:var(--post-blue-dark)}.btn-primary:disabled{background:#9daed9;cursor:wait}.btn-secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}.btn-secondary:hover{border-color:var(--muted)}.btn-gmail{background:var(--post-red);color:#fff;flex:1 1}.btn-gmail:hover{background:#b93521}.actions{display:flex;gap:10px;margin-top:12px}.result-subject{font-weight:700;font-size:17px;border:none;border-bottom:1px solid var(--line);border-radius:0;padding:8px 0}.result-body{border:none;padding:8px 0 0;min-height:220px;line-height:1.55}.result-body:focus,.result-subject:focus{box-shadow:none;border-color:var(--post-blue)}.hint{font-size:13px;color:var(--muted);margin:6px 0 0}.error{background:#fdf0ee;border:1px solid #f3c4bc;color:#9c2d1b;border-radius:8px;padding:10px 12px}.error,.success{font-size:14px;margin-top:10px}.success{color:#1c7a3d}.check-row{display:flex;align-items:center;gap:8px;margin:14px 0;font-size:14px;color:var(--muted)}.check-row input{width:18px;height:18px;accent-color:var(--post-blue)}.history-item{padding:12px 0;border-top:1px solid var(--line);cursor:pointer}.history-item:first-of-type{border-top:none}.history-item .h-subject{font-weight:600;font-size:14px}.history-item .h-prompt{font-size:12.5px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.section-title{font-family:var(--mono);font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin:24px 0 8px}.login-wrap{min-height:100dvh;display:flex;flex-direction:column}.login-center{flex:1 1;display:flex;align-items:center;justify-content:center;padding:24px 16px}.login-card{width:100%;max-width:380px}.login-card h1{font-size:26px;letter-spacing:-.03em;margin:0 0 4px}.login-card p.sub{color:var(--muted);margin:0 0 20px;font-size:14px}.field{margin-bottom:14px}@media (max-width:480px){.shell{padding:16px 12px 56px}.actions{flex-direction:column}.btn-gmail{width:100%}}@media (prefers-reduced-motion:reduce){*{transition:none!important}}.selector-row{display:flex;gap:12px;align-items:flex-end}.segmented{display:inline-flex;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:#fff}.segmented button{font-family:var(--mono);font-size:12px;letter-spacing:.06em;border:none;background:transparent;color:var(--muted);padding:12px 14px;cursor:pointer;min-height:46px}.segmented button.seg-on{background:var(--post-blue);color:#fff}.lang-tag{font-size:10px;color:var(--post-blue);border:1px solid;border-radius:4px;padding:1px 4px;margin-right:4px;vertical-align:1px}.back-link,.lang-tag{font-family:var(--mono);letter-spacing:.06em}.back-link{font-size:12px;text-transform:uppercase;color:var(--muted);background:none;border:none;padding:0;margin-bottom:16px;cursor:pointer}.back-link:hover{color:var(--ink)}.btn-danger{color:var(--post-red);border-color:#f0c8c0}.btn-danger:hover{border-color:var(--post-red)}select{-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236d7280' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:34px;min-height:46px}@media (max-width:480px){.selector-row{flex-wrap:wrap}.selector-row>div:first-child{flex-basis:100%}}