:root{--ink: #1f2933;--muted: #6b7785;--line: #e3e7ec;--soft: #f4f6f8;--accent: #243b53;--accent-soft: #e8eef5;--danger: #b42318;--ok: #1d7a46;font:14px/1.45 -apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:#fff}*{box-sizing:border-box}body{margin:0}button{font:inherit;cursor:pointer;border:0;border-radius:8px;padding:8px 14px;background:var(--accent);color:#fff}button:disabled{opacity:.5;cursor:default}button.ghost{background:transparent;color:var(--accent);border:1px solid var(--line)}button.ghost:hover{background:var(--soft)}button.danger{color:var(--danger)}button.link{background:none;color:var(--accent);padding:0 4px;text-decoration:underline}input,textarea{font:inherit;color:inherit;border:1px solid var(--line);border-radius:8px;padding:8px 10px;width:100%;background:#fff}input:focus,textarea:focus{outline:2px solid var(--accent-soft);border-color:var(--accent)}.field{display:grid;grid-template-columns:64px 1fr;align-items:center;gap:8px;margin-bottom:8px}.field span{color:var(--muted)}.error{color:var(--danger);margin:8px 0}.notice{background:#fff8e6;border:1px solid #f3dfa6;border-radius:8px;padding:8px 12px;margin:8px 0}.empty{color:var(--muted);text-align:center;padding:40px 16px}.logo{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--accent);color:#fff;font-size:18px}.logo.big{width:52px;height:52px;font-size:26px}.login{min-height:100vh;display:grid;place-items:center;background:var(--soft);padding:16px}.login-card{width:min(380px,100%);background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px;display:grid;gap:4px}.login-card h1{margin:10px 0 14px;font-size:22px}.login-card .field{grid-template-columns:1fr;gap:4px}.login-card button{margin-top:8px;padding:11px}.mail{height:100vh;display:grid;grid-template:"top top top" auto "folders list reader" 1fr / 200px minmax(280px,380px) 1fr}.topbar{grid-area:top;display:flex;justify-content:space-between;align-items:center;padding:10px 16px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font-weight:600}.brand small{display:block;font-weight:400;color:var(--muted)}.folders{grid-area:folders;padding:12px;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:4px}.compose-button{margin-bottom:10px;padding:10px}.folder{background:none;color:var(--ink);text-align:left;display:flex;justify-content:space-between}.folder:hover{background:var(--soft)}.folder.active{background:var(--accent-soft);color:var(--accent);font-weight:600}.count{background:var(--accent);color:#fff;border-radius:10px;padding:0 7px;font-size:12px;line-height:20px}.list{grid-area:list;border-right:1px solid var(--line);overflow:auto;display:flex;flex-direction:column}.search{margin:12px;width:auto}.list ul{list-style:none;margin:0;padding:0}.row{width:100%;background:none;color:var(--ink);border-radius:0;border-bottom:1px solid var(--line);padding:10px 14px;display:grid;grid-template-columns:1fr auto;gap:2px 8px;text-align:left}.row:hover{background:var(--soft)}.row.selected{background:var(--accent-soft)}.row .who,.row .subject,.row .snippet{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.row .when{color:var(--muted);font-size:12px}.row .subject{grid-column:1 / 3}.row .snippet{grid-column:1 / 3;color:var(--muted);font-size:13px}.row.unread .who,.row.unread .subject{font-weight:700}.row.unread{box-shadow:inset 3px 0 0 var(--accent)}.more{margin:12px}.reader{grid-area:reader;overflow:auto}.letter{padding:16px 24px 40px;max-width:980px}.letter-actions{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px}.letter-actions .back{display:none}.letter-subject{font-size:20px;margin:0 0 10px;overflow-wrap:anywhere}.letter-head{display:grid;grid-template-columns:64px 1fr;gap:2px 10px;margin:0 0 12px}.letter-head dt{color:var(--muted)}.letter-head dd{margin:0;overflow-wrap:anywhere}.delivery{color:var(--ok);margin:0 0 10px}.delivery.bad{color:var(--danger)}.letter-frame{width:100%;border:0;display:block}.letter-text{white-space:pre-wrap;overflow-wrap:anywhere;font:inherit;margin:0}.files{list-style:none;padding:12px 0 0;margin:16px 0 0;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:8px}.files li{background:var(--soft);border-radius:8px;padding:6px 10px}.files a{color:var(--accent)}.files span{color:var(--muted);font-size:12px}.compose-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;background:#0f172059;display:grid;place-items:center;padding:16px;z-index:10}.compose{width:min(760px,100%);max-height:100%;overflow:auto;background:#fff;border-radius:14px;padding:16px 18px;display:flex;flex-direction:column}.compose-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.add-cc{align-self:flex-start;margin:-2px 0 8px 72px}.compose-text{min-height:260px;resize:vertical}.compose-files{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:10px 0}.chip{background:var(--soft);border-radius:8px;padding:4px 8px;font-size:13px}.attach{color:var(--accent);cursor:pointer;text-decoration:underline}.attach input{display:none}.total{color:var(--muted);font-size:12px}.total.bad{color:var(--danger)}.compose-actions{display:flex;align-items:center;gap:12px}.hint{color:var(--muted);font-size:12px}.toast{position:fixed;bottom:20px;left:50%;transform:translate(-50%);background:var(--ink);color:#fff;padding:10px 16px;border-radius:10px;z-index:20}@media (max-width: 860px){.mail{grid-template:"top" auto "folders" auto "list" 1fr / 1fr}.folders{flex-direction:row;overflow-x:auto;border-right:0;border-bottom:1px solid var(--line);padding:8px 12px}.compose-button{margin:0}.folder{white-space:nowrap;gap:6px}.list{border-right:0}.reader{display:none}.mail.reading{grid-template:"top" auto "reader" 1fr / 1fr}.mail.reading .folders,.mail.reading .list{display:none}.mail.reading .reader{display:block}.letter{padding:12px 16px 32px}.letter-actions .back{display:inline-block}.field{grid-template-columns:1fr;gap:2px}.add-cc{margin-left:0}.compose-backdrop{padding:0}.compose{border-radius:0;height:100%}}