:root{--bg:#fbfbfa;--panel:#fff;--border:#e5e3df;--text:#1c1b19;--muted:#6b6862;--accent:#1f6f5c;--accent-soft:#e8f2ee;--unread:#b8452f;--radius:8px;--sidebar-width:260px;--list-width:340px}@media (prefers-color-scheme:dark){:root{--bg:#17181a;--panel:#1e1f22;--border:#2e3035;--text:#ecebe8;--muted:#9a9790;--accent:#6dbfa4;--accent-soft:#23342e;--unread:#e0785f}}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);margin:0;font:15px/1.5 -apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}a{color:inherit;text-decoration:none}.shell{grid-template-columns:var(--sidebar-width) var(--list-width) 1fr;height:100dvh;display:grid}.column{border-right:1px solid var(--border);overflow-y:auto}.column:last-child{border-right:none}@media (max-width:900px){.shell{grid-template-columns:1fr}.shell[data-view=list] .column-thread,.shell[data-view=list] .column-sidebar,.shell[data-view=thread] .column-sidebar,.shell[data-view=thread] .column-list{display:none}}.brand{letter-spacing:-.01em;border-bottom:1px solid var(--border);padding:16px;font-weight:600}.brand small{color:var(--muted);font-size:12px;font-weight:400;display:block}.nav-section{text-transform:uppercase;letter-spacing:.06em;color:var(--muted);padding:12px 8px 4px 16px;font-size:11px}.nav-item{border-radius:var(--radius);justify-content:space-between;align-items:center;gap:8px;margin:1px 8px;padding:7px 16px;display:flex}.nav-item:hover{background:var(--panel)}.nav-item[aria-current=true]{background:var(--accent-soft);color:var(--accent);font-weight:600}.nav-item .address{text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.badge{text-align:center;background:var(--unread);color:#fff;border-radius:999px;min-width:20px;padding:1px 6px;font-size:11px;font-weight:600}.badge.muted{background:var(--border);color:var(--muted)}.list-header{background:var(--bg);border-bottom:1px solid var(--border);justify-content:space-between;align-items:baseline;gap:8px;padding:14px 16px;display:flex;position:sticky;top:0}.list-header h1{margin:0;font-size:15px}.filters{border-bottom:1px solid var(--border);gap:6px;padding:8px 12px;display:flex;overflow-x:auto}.filter{color:var(--muted);border:1px solid var(--border);white-space:nowrap;border-radius:999px;padding:4px 10px;font-size:12px}.filter[aria-current=true]{background:var(--accent-soft);color:var(--accent);border-color:#0000}.thread-row{border-bottom:1px solid var(--border);padding:12px 16px;display:block}.thread-row:hover{background:var(--panel)}.thread-row[aria-current=true]{background:var(--accent-soft)}.thread-row .top{justify-content:space-between;gap:8px;font-size:13px;display:flex}.thread-row .who{text-overflow:ellipsis;white-space:nowrap;font-weight:600;overflow:hidden}.thread-row.unread .who:before{content:"";background:var(--unread);vertical-align:middle;border-radius:50%;width:7px;height:7px;margin-right:6px;display:inline-block}.thread-row time{color:var(--muted);white-space:nowrap;font-size:12px}.thread-row .subject{text-overflow:ellipsis;white-space:nowrap;margin-top:2px;overflow:hidden}.thread-row .preview{color:var(--muted);text-overflow:ellipsis;white-space:nowrap;font-size:13px;overflow:hidden}.thread-header{border-bottom:1px solid var(--border);padding:16px 20px}.thread-header h2{margin:0 0 4px;font-size:18px;line-height:1.3}.thread-header .meta{color:var(--muted);font-size:13px}.message{border-bottom:1px solid var(--border);padding:16px 20px}.message.outbound{background:var(--panel)}.message .head{justify-content:space-between;gap:12px;margin-bottom:8px;font-size:13px;display:flex}.message .from{font-weight:600}.message .body{white-space:pre-wrap;word-break:break-word}.pill{border:1px solid var(--border);color:var(--muted);border-radius:999px;padding:1px 8px;font-size:11px;display:inline-block}.pill.warn{border-color:var(--unread);color:var(--unread)}.composer{gap:8px;padding:16px 20px;display:grid}textarea,input[type=text],input[type=email]{border:1px solid var(--border);border-radius:var(--radius);background:var(--panel);width:100%;color:var(--text);font:inherit;resize:vertical;padding:10px 12px}button{border-radius:var(--radius);background:var(--accent);color:#fff;font:inherit;cursor:pointer;border:1px solid #0000;padding:8px 16px;font-weight:600}button.secondary{border-color:var(--border);color:var(--text);background:0 0;font-weight:400}button:disabled{opacity:.5;cursor:default}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.empty{text-align:center;color:var(--muted);padding:48px 24px}.error{color:var(--unread);font-size:13px}.login{gap:12px;max-width:360px;margin:15vh auto;padding:24px;display:grid}