:root{--brand-primary: #1f6feb;--brand-accent: #0a3d8f;--brand-font: "Segoe UI", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;--bg: #f5f6f8;--surface: #ffffff;--border: #e2e5ea;--text: #1a1d23;--muted: #6b7280}html[data-mode=dark]{--bg: #0d1117;--surface: #161b22;--border: #2a2f37;--text: #e6edf3;--muted: #9098a3}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}body{font-family:var(--brand-font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}button{font-family:inherit;cursor:pointer}.btn-primary{background:var(--brand-primary);color:#fff;border:none;padding:9px 16px;border-radius:8px;font-weight:600}.btn-primary:disabled{opacity:.6;cursor:default}.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border);padding:8px 14px;border-radius:8px}.error-banner{background:#fdecec;color:#b42318;border:1px solid #f5c2c0;padding:8px 12px;border-radius:8px;font-size:14px}.login-screen{height:100%;display:grid;place-items:center;padding:20px}.login-card{width:100%;max-width:380px;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:28px;display:flex;flex-direction:column;gap:14px;box-shadow:0 10px 30px #0000000f}.login-title{margin:0;color:var(--brand-primary)}.login-sub{margin:0 0 6px;color:var(--muted)}.field{display:flex;flex-direction:column;gap:6px;font-size:14px}.field>span{color:var(--muted)}.field input,.field select,.field textarea{padding:10px 12px;border:1px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text);font-size:14px}.field textarea{resize:vertical}.workspace{height:100%;display:flex;flex-direction:column}.topbar{display:flex;align-items:center;justify-content:space-between;padding:10px 16px;background:var(--surface);border-bottom:1px solid var(--border)}.brand{display:flex;align-items:center;gap:10px}.brand-logo{height:28px;width:auto}.brand-name{font-weight:700;font-size:18px;color:var(--brand-accent)}.topbar-actions{display:flex;align-items:center;gap:12px}.user-email{color:var(--muted);font-size:14px}.layout{flex:1;display:grid;grid-template-columns:240px 360px 1fr;min-height:0}.sidebar,.list-pane{border-right:1px solid var(--border);overflow-y:auto;background:var(--surface)}.detail-pane{overflow-y:auto;background:var(--bg)}.mailbox-list{display:flex;flex-direction:column;padding:8px;gap:4px}.mailbox-item{text-align:left;background:transparent;border:none;border-radius:8px;padding:10px 12px;display:flex;flex-direction:column;gap:2px;color:var(--text)}.mailbox-item:hover{background:var(--bg)}.mailbox-item.is-active{background:color-mix(in srgb,var(--brand-primary) 14%,transparent)}.mailbox-name{font-weight:600;font-size:14px}.mailbox-addr{font-size:12px;color:var(--muted)}.sidebar-empty,.list-state,.detail-empty{padding:24px;color:var(--muted)}.list-state.error,.detail-empty.error{color:#b42318}.email-list{list-style:none;margin:0;padding:0}.email-row{display:flex;gap:8px;padding:12px 14px;border-bottom:1px solid var(--border);cursor:pointer}.email-row:hover{background:var(--bg)}.email-row.is-active{background:color-mix(in srgb,var(--brand-primary) 10%,transparent)}.email-row.is-unread .email-subject,.email-row.is-unread .email-from{font-weight:700}.star{background:none;border:none;color:var(--border);font-size:18px;line-height:1;padding:0}.star.on{color:#f5b50a}.email-row-main{flex:1;min-width:0}.email-row-top{display:flex;justify-content:space-between;gap:8px}.email-from{font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.email-date{font-size:12px;color:var(--muted);flex-shrink:0}.email-subject{font-size:14px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.email-detail{padding:20px 24px;max-width:860px}.detail-head{display:flex;align-items:center;justify-content:space-between;gap:12px}.detail-subject{margin:0;font-size:20px}.detail-meta{margin:12px 0;padding:12px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);font-size:14px;color:var(--muted);display:grid;gap:4px}.detail-meta strong{color:var(--text)}.attachments{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}.attachment-chip{border:1px solid var(--border);background:var(--surface);border-radius:999px;padding:6px 12px;font-size:13px;color:var(--text)}.att-size{color:var(--muted)}.detail-body{margin-top:16px}.email-text{white-space:pre-wrap;word-break:break-word;font-family:inherit;font-size:14px;line-height:1.5;margin:0}.email-html{width:100%;min-height:420px;border:1px solid var(--border);border-radius:8px;background:#fff}.modal-overlay{position:fixed;top:0;right:0;bottom:0;left:0;background:#0006;display:grid;place-items:center;padding:16px;z-index:10}.compose{width:100%;max-width:600px;background:var(--surface);border-radius:14px;padding:20px;display:flex;flex-direction:column;gap:12px;max-height:90vh;overflow-y:auto}.compose-head{display:flex;align-items:center;justify-content:space-between}.compose-head h3{margin:0}.compose-actions{display:flex;justify-content:flex-end;gap:10px}@media(max-width:880px){.layout{grid-template-columns:1fr;grid-template-rows:auto auto 1fr}.sidebar{border-right:none;border-bottom:1px solid var(--border)}.mailbox-list{flex-direction:row;overflow-x:auto}.mailbox-item{min-width:160px}.list-pane{border-right:none;border-bottom:1px solid var(--border);max-height:38vh}.user-email{display:none}}