:root {
  --mail-bg: var(--sv-color-canvas);
  --mail-panel: var(--sv-color-surface);
  --mail-panel-soft: var(--sv-color-surface-strong);
  --mail-line: var(--sv-color-border);
  --mail-line-strong: var(--sv-color-border-strong);
  --mail-text: var(--sv-color-text);
  --mail-muted: var(--sv-color-text-muted);
  --mail-accent: var(--sv-color-brand);
  --mail-cyan: var(--sv-color-info);
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 980px; background: var(--mail-bg); color: var(--mail-text); }
button, input { font: inherit; }
.skip-link { position: fixed; left: 76px; top: -50px; z-index: 30; padding: 10px 14px; border-radius: 10px; background: var(--mail-accent); color: var(--sv-color-on-brand); }
.skip-link:focus { top: 12px; }

.mail-shell { min-height: 100vh; padding: 34px 38px 42px 98px; background: var(--mail-bg); }
.mail-hero { max-width: 1540px; margin: 0 auto 26px; display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; }
.eyebrow { margin: 0 0 8px; color: var(--mail-accent); font: 700 10px/1.2 var(--sv-font-mono); letter-spacing: .13em; text-transform: uppercase; }
.mail-hero h1 { margin: 0; font-size: var(--sv-font-size-title); font-weight: 600; line-height: 1.28; letter-spacing: -0.01em; }
.mail-hero p:last-child { margin: 9px 0 0; color: var(--mail-muted); font-size: 13px; }
.mail-actions { display: flex; gap: 10px; }
.mail-button { min-height: 40px; padding: 0 17px; display: inline-flex; align-items: center; justify-content: center; border: 1px solid var(--mail-line-strong); border-radius: 12px; background: var(--sv-color-surface-strong); color: var(--mail-text); text-decoration: none; cursor: pointer; transition: border-color .18s, transform .18s, background .18s; }
.mail-button:hover { border-color: rgba(200,255,24,.55); transform: translateY(-1px); }
.mail-button.primary { border-color: var(--mail-accent); background: var(--mail-accent); color: var(--sv-color-on-brand); font-weight: 750; }
.mail-button:disabled { opacity: .55; cursor: wait; transform: none; }

.mail-workspace { max-width: 1540px; min-height: calc(100vh - 146px); margin: 0 auto; display: grid; grid-template-columns: 238px minmax(0, 1fr); overflow: hidden; border: 1px solid var(--mail-line); border-radius: 18px; background: var(--mail-panel); box-shadow: 0 24px 70px rgba(0,0,0,.28); }
.mail-folders { padding: 18px 12px; border-right: 1px solid var(--mail-line); background: rgba(255,255,255,.012); }
.folder-head { height: 34px; padding: 0 10px; display: flex; align-items: center; justify-content: space-between; color: var(--mail-muted); font-size: 11px; }
.folder-head b { color: var(--mail-text); }
.folder-row { width: 100%; min-height: 46px; margin: 3px 0; padding: 0 11px; display: flex; align-items: center; justify-content: space-between; border: 0; border-radius: 11px; background: transparent; color: var(--sv-color-text-muted); text-align: left; cursor: pointer; }
.folder-row:hover { background: rgba(255,255,255,.04); color: var(--mail-text); }
.folder-row.active { background: var(--sv-color-selection-bg); color: var(--mail-text); box-shadow: inset 3px 0 0 var(--mail-accent); }
.folder-row span { min-width: 0; display: flex; align-items: center; gap: 9px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder-row i { width: 7px; height: 7px; flex: 0 0 auto; border-radius: 50%; background: #69706b; box-shadow: 0 0 0 4px rgba(255,255,255,.025); }
.folder-row.ready i { background: var(--mail-accent); }
.folder-row.error i { background: #ff655f; }
.folder-row b { min-width: 24px; color: inherit; font: 700 11px/1 var(--sv-font-mono); text-align: right; }
.add-account { margin: 16px 10px 0; padding-top: 16px; display: block; border-top: 1px solid var(--mail-line); color: var(--mail-muted); font-size: 12px; text-decoration: none; }
.add-account:hover { color: var(--mail-accent); }

.message-pane { min-width: 0; }
.message-toolbar { min-height: 68px; padding: 13px 20px; display: grid; grid-template-columns: minmax(240px, 480px) auto 1fr; align-items: center; gap: 18px; border-bottom: 1px solid var(--mail-line); }
.mail-search { height: 40px; padding: 0 13px; display: flex; align-items: center; gap: 10px; border: 1px solid var(--mail-line); border-radius: 12px; background: var(--sv-color-surface-subtle); }
.mail-search:focus-within { border-color: rgba(200,255,24,.55); box-shadow: 0 0 0 3px rgba(200,255,24,.05); }
.mail-search svg { width: 17px; fill: none; stroke: #7e857f; stroke-width: 1.6; }
.mail-search input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--mail-text); font-size: 12px; }
.unread-filter { display: flex; align-items: center; gap: 8px; color: var(--mail-muted); font-size: 11px; cursor: pointer; }
.unread-filter input { position: absolute; opacity: 0; }
.unread-filter span { width: 30px; height: 17px; position: relative; border: 1px solid var(--mail-line-strong); border-radius: 99px; background: var(--sv-color-surface-subtle); }
.unread-filter span::after { content: ""; position: absolute; left: 3px; top: 3px; width: 9px; height: 9px; border-radius: 50%; background: #656b66; transition: .18s; }
.unread-filter input:checked + span { border-color: var(--mail-accent); background: rgba(200,255,24,.13); }
.unread-filter input:checked + span::after { left: 16px; background: var(--mail-accent); }
.last-sync { justify-self: end; color: var(--sv-color-text-faint); font: 10px/1.3 var(--sv-font-mono); }
.message-header, .message-row { display: grid; grid-template-columns: minmax(360px, 1fr) 190px 110px; gap: 20px; align-items: center; }
.message-header { min-height: 38px; padding: 0 24px; border-bottom: 1px solid var(--mail-line); color: var(--sv-color-text-faint); font-size: 10px; letter-spacing: .06em; }
.message-list { min-height: 420px; }
.message-row { width: 100%; min-height: 70px; padding: 11px 24px; border: 0; border-bottom: 1px solid var(--sv-color-border-soft); background: transparent; color: inherit; text-align: left; cursor: pointer; transition: background .16s; }
.message-row:hover { background: rgba(255,255,255,.025); }
.message-row:focus-visible { outline: 1px solid rgba(200,255,24,.5); outline-offset: -2px; }
.message-main { min-width: 0; display: grid; grid-template-columns: 9px minmax(118px, .32fr) minmax(180px, 1fr); gap: 14px; align-items: center; }
.unread-dot { width: 6px; height: 6px; border-radius: 50%; background: transparent; }
.message-row.unread .unread-dot { background: var(--mail-cyan); box-shadow: 0 0 10px rgba(66,217,255,.5); }
.message-main strong, .message-main span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.message-main strong { color: var(--sv-color-text); font-size: 12px; font-weight: 600; }
.message-main span { color: var(--sv-color-text-muted); font-size: 12px; }
.message-row.unread .message-main strong, .message-row.unread .message-main span { color: var(--mail-text); }
.message-account { overflow: hidden; color: var(--sv-color-text-muted); font-size: 11px; text-overflow: ellipsis; white-space: nowrap; }
.message-time { color: var(--sv-color-text-faint); font: 10px/1.2 var(--sv-font-mono); text-align: right; }
.mail-loading, .mail-empty { min-height: 420px; padding: 40px; display: grid; place-items: center; align-content: center; gap: 15px; color: var(--mail-muted); text-align: center; }
.mail-loading i { width: 24px; height: 24px; border: 2px solid rgba(200,255,24,.14); border-top-color: var(--mail-accent); border-radius: 50%; animation: mail-spin .75s linear infinite; }
.mail-empty strong { color: var(--mail-text); font-size: 16px; }
.mail-empty span { max-width: 420px; font-size: 12px; line-height: 1.7; }
.mail-empty a { color: var(--mail-accent); text-decoration: none; }
.mail-toast { position: fixed; right: 24px; bottom: 24px; z-index: 50; max-width: 440px; padding: 12px 16px; border: 1px solid var(--mail-line-strong); border-radius: 12px; background: var(--sv-color-surface-elevated); color: var(--mail-text); box-shadow: 0 18px 48px rgba(0,0,0,.4); opacity: 0; transform: translateY(12px); pointer-events: none; transition: .2s; }
.mail-toast.show { opacity: 1; transform: translateY(0); }

.mail-reader { width: min(760px, calc(100vw - 48px)); height: calc(100vh - 40px); max-height: none; margin: 20px 20px 20px auto; padding: 0; overflow: hidden; border: 1px solid var(--mail-line-strong); border-radius: 18px; background: var(--sv-color-surface); color: var(--mail-text); box-shadow: -24px 0 80px rgba(0,0,0,.52); }
.mail-reader[open] { animation: reader-in .24s cubic-bezier(.16,1,.3,1); }
.mail-reader::backdrop { background: rgba(0,0,0,.58); backdrop-filter: blur(4px); }
.mail-reader > section { height: 100%; display: flex; flex-direction: column; }
.reader-toolbar { min-height: 64px; padding: 0 18px; display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; border-bottom: 1px solid var(--mail-line); }
.reader-action, .reader-close { border: 1px solid var(--mail-line-strong); border-radius: 10px; background: var(--sv-color-surface-elevated); color: var(--mail-text); cursor: pointer; }
.reader-action { min-height: 36px; padding: 0 13px; font-size: 11px; }
.reader-action:hover, .reader-close:hover { border-color: rgba(200,255,24,.5); }
.reader-action:disabled { opacity: .45; cursor: wait; }
.reader-close { width: 36px; height: 36px; font-size: 20px; }
.reader-content { flex: 1; overflow-y: auto; padding: 34px clamp(26px, 5vw, 58px) 60px; }
.reader-account { margin: 0 0 15px; color: var(--mail-accent); font: 700 10px/1.2 var(--sv-font-mono); letter-spacing: .1em; text-transform: uppercase; }
.reader-content h2 { margin: 0; color: var(--mail-text); font-size: clamp(23px, 2.2vw, 34px); line-height: 1.28; letter-spacing: -.035em; }
.reader-meta { margin: 26px 0 0; display: grid; gap: 9px; }
.reader-meta div { display: grid; grid-template-columns: 58px minmax(0, 1fr); gap: 13px; font-size: 11px; line-height: 1.55; }
.reader-meta dt { color: var(--sv-color-text-faint); }
.reader-meta dd { margin: 0; overflow-wrap: anywhere; color: var(--sv-color-text-muted); }
.reader-divider { height: 1px; margin: 28px 0; background: var(--mail-line); }
.reader-body { margin: 0; border: 0; background: transparent; color: var(--sv-color-text); font: 13px/1.85 var(--sv-font-sans, sans-serif); white-space: pre-wrap; overflow-wrap: anywhere; }
.reader-body.loading { color: var(--mail-muted); }
@keyframes reader-in { from { opacity: 0; transform: translateX(34px); } to { opacity: 1; transform: translateX(0); } }
@keyframes mail-spin { to { transform: rotate(360deg); } }

@media (max-width: 1180px) {
  .mail-shell { padding-right: 22px; }
  .mail-workspace { grid-template-columns: 200px minmax(0, 1fr); }
  .message-header, .message-row { grid-template-columns: minmax(330px, 1fr) 130px 90px; }
}
.inbox-source-tabs { display:flex; gap:8px; margin:0 0 16px; }
.inbox-source-tabs button { border:0; border-radius:999px; padding:9px 14px; color:var(--sv-text-muted); background:rgba(255,255,255,.06); cursor:pointer; }
.inbox-source-tabs button.active { color: var(--sv-color-on-brand); background:var(--sv-color-brand); font-weight:800; }
.inbox-source-tabs b { margin-left:5px; }
.knowledge-inbox { border:1px solid var(--sv-color-border-soft); border-radius:22px; padding:22px; background:rgba(15,15,15,.82); }
.knowledge-inbox > header { display:flex; align-items:center; justify-content:space-between; margin-bottom:16px; }
.knowledge-inbox h2 { margin:2px 0 0; }
.knowledge-inbox-list { display:grid; gap:10px; }
.knowledge-batch-add { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:10px; margin-bottom:14px; }
.knowledge-batch-add textarea { min-height:66px; resize:vertical; border:1px solid var(--sv-color-border); border-radius:12px; padding:11px 13px; background:var(--sv-color-surface-subtle); color:var(--sv-text); }
.knowledge-inbox-row { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:16px; padding:16px; border-radius:16px; background:rgba(255,255,255,.045); }
.knowledge-inbox-row h3 { margin:0 0 6px; font-size:15px; }
.knowledge-inbox-row p { margin:0; color:var(--sv-text-muted); font-size:13px; line-height:1.55; }
.knowledge-inbox-row a { color:var(--sv-color-brand); font-size:12px; }
.knowledge-inbox-actions { display:flex; align-items:center; gap:8px; }
.knowledge-merge-select { max-width:190px; height:34px; border:1px solid var(--sv-color-border); border-radius:9px; color:var(--sv-text); background:var(--sv-color-surface-strong); }