/* Toggle Minds palette: teal #0f7b6c, mint #4fd1b8. */
:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1c2430;
  --muted: #6b7686;
  --line: #e3e7ec;
  --accent: #0f7b6c;
  --accent-text: #ffffff;
  --hover: #eef3f2;
  --selected: #d5efe9;
  --danger: #c62828;
  --unread: #0b5f54;
  --mint: #4fd1b8;
  /* column colours (coloured mode) */
  --nav-bg: #0f7b6c;
  --nav-text: #e9f7f4;
  --nav-muted: #a9dcd2;
  --nav-hover: rgb(255 255 255 / .10);
  --nav-active: rgb(255 255 255 / .20);
  --list-bg: #f0f8f6;
  --list-head: #e3f3ef;
  --reader-bg: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111418;
    --panel: #1a1e24;
    --text: #e6e9ee;
    --muted: #96a0ad;
    --line: #2a3038;
    --accent: #3fbfa6;
    --accent-text: #08201c;
    --hover: #222a2f;
    --selected: #1d3d38;
    --danger: #ff6b6b;
    --unread: #7fe0cc;
    --nav-bg: #0b2f2a;
    --nav-text: #dff3ee;
    --nav-muted: #86b9ae;
    --list-bg: #141b1c;
    --list-head: #182224;
    --reader-bg: #1a1e24;
    color-scheme: dark;
  }
}
/* Plain mode: one neutral surface everywhere. */
#app.plain {
  --nav-bg: var(--bg);
  --nav-text: var(--text);
  --nav-muted: var(--muted);
  --nav-hover: var(--hover);
  --nav-active: var(--selected);
  --list-bg: var(--panel);
  --list-head: var(--panel);
  --reader-bg: var(--panel);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Ubuntu, Cantarell, "Noto Sans", sans-serif;
}
button, input, select, textarea { font: inherit; color: inherit; }
button {
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px;
  padding: 5px 10px; cursor: pointer;
}
button:hover { background: var(--hover); }
button:disabled { opacity: .5; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button.ghost { background: transparent; border-color: transparent; color: var(--accent); }
button.danger { color: var(--danger); }
button.icon { padding: 5px 9px; }
svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.9; stroke-linecap: round; stroke-linejoin: round; flex: none; }
input, select, textarea {
  background: var(--panel); border: 1px solid var(--line); border-radius: 6px; padding: 6px 8px; width: 100%;
}
input:focus, select:focus, textarea:focus, #editor:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
.muted { color: var(--muted); }
.grow { flex: 1; }
.error { color: var(--danger); min-height: 1em; margin: 4px 0; }
.note { color: var(--muted); font-size: 12.5px; margin: 0; }

/* ---------- layouts ---------- */
#app { --nav-w: 240px; --list-w: 380px; display: grid; height: 100vh; }
#app.nav-icons { --nav-w: 64px; }
/* Reading pane on the right: three columns. */
#app.pane-right { grid-template-columns: var(--nav-w) var(--list-w) 1fr; grid-template-areas: "nav list reader"; }
/* Reading pane at the bottom: the list sits above the message. */
#app.pane-bottom { grid-template-columns: var(--nav-w) 1fr; grid-template-rows: minmax(160px, 42%) 1fr; grid-template-areas: "nav list" "nav reader"; }
/* Reading pane off: two columns; an open message takes the list's place. */
#app.pane-off { grid-template-columns: var(--nav-w) 1fr; grid-template-areas: "nav main"; }
#app.pane-off #list-pane, #app.pane-off #reader { grid-area: main; }
#app.pane-off:not(.reading) #reader { display: none; }
#app.pane-off.reading #list-pane { display: none; }
#back-btn { display: none; }
#app.pane-off #back-btn { display: inline-block; }
#sidebar { grid-area: nav; }
#list-pane { grid-area: list; }
#reader { grid-area: reader; }
#app.pane-bottom #list-pane { border-right: none; border-bottom: 1px solid var(--line); }
#app.pane-bottom #messages li .top, #app.pane-off #messages li .top { max-width: 1100px; }

/* ---------- sidebar ---------- */
#sidebar {
  background: var(--nav-bg); color: var(--nav-text); border-right: 1px solid var(--line);
  padding: 10px 8px; overflow-y: auto; overflow-x: hidden; display: flex; flex-direction: column; gap: 8px;
}
.side-top { display: flex; align-items: center; gap: 6px; }
.side-btn { background: transparent; border: none; color: var(--nav-text); }
.side-btn:hover { background: var(--nav-hover); }
.brand { display: flex; align-items: center; gap: 8px; font-weight: 750; letter-spacing: -0.01em; white-space: nowrap; }
.brand img { border-radius: 6px; }
#compose-btn { width: 100%; padding: 9px; display: flex; align-items: center; justify-content: center; gap: 8px; }
#app:not(.plain) #compose-btn { background: var(--mint); color: #08302a; border-color: var(--mint); font-weight: 600; }
#add-account-btn { display: flex; align-items: center; justify-content: center; gap: 6px; color: var(--nav-text); }
#add-account-btn:hover { background: var(--nav-hover); }
.acct { margin-top: 6px; }
.acct-head { display: flex; align-items: center; gap: 8px; padding: 4px 6px; font-weight: 600; font-size: 13px; }
.acct-head .aname { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1; }
.acct-head button { padding: 0 6px; border: none; background: transparent; color: var(--nav-muted); }
.acct-head button:hover { background: var(--nav-hover); color: var(--nav-text); }
.avatar {
  width: 26px; height: 26px; border-radius: 50%; display: grid; place-items: center; flex: none;
  background: var(--mint); color: #08302a; font-weight: 700; font-size: 10.5px; letter-spacing: -.02em; text-transform: uppercase;
}
/* Accounts grouped by mail service */
.service-head {
  display: flex; align-items: center; gap: 8px; margin: 12px 4px 2px; padding-top: 8px;
  border-top: 1px solid rgb(255 255 255 / .14); font-size: 11.5px; font-weight: 700;
  text-transform: uppercase; letter-spacing: .06em; color: var(--nav-muted);
}
#accounts .service-head:first-child { border-top: none; margin-top: 2px; padding-top: 0; }
#app.plain .service-head { border-top-color: var(--line); }
.service-logo { width: 20px; height: 20px; display: grid; place-items: center; flex: none;
  background: #fff; border-radius: 5px; padding: 2px; }
.service-logo img, .service-logo svg { width: 16px; height: 16px; border-radius: 3px; }
.brand-logo.mono { color: #111; }
.avatar { position: relative; }
.avatar.three { font-size: 9.5px; letter-spacing: -.04em; }
.avatar .badge {
  position: absolute; right: -4px; bottom: -4px; width: 14px; height: 14px; display: grid; place-items: center;
  background: #fff; border-radius: 4px; box-shadow: 0 0 0 1.5px var(--nav-bg);
}
.avatar .badge img, .avatar .badge svg { width: 11px; height: 11px; border-radius: 2px; }
.acct-head .aname { display: flex; flex-direction: column; line-height: 1.2; min-width: 0; }
.acct-head .aname .who { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.acct-head .aname .addr { font-size: 11px; font-weight: 400; color: var(--nav-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#app.nav-icons .service-head { justify-content: center; margin: 10px 0 2px; }
.folder { display: flex; align-items: center; gap: 10px; padding: 6px 10px; border-radius: 6px; cursor: pointer; color: var(--nav-text); }
.folder .fname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.folder:hover { background: var(--nav-hover); }
.folder.active { background: var(--nav-active); font-weight: 600; }
.folder .count { font-weight: 700; font-size: 12px; color: var(--mint); }
#app.plain .folder .count { color: var(--accent); }
.folder.sub { padding-left: 22px; }
.acct-error { color: #ffb4b4; font-size: 12px; padding: 2px 10px; }
#app.plain .acct-error { color: var(--danger); }

/* Navigation collapsed to icons. */
#app.nav-icons .side-top .brand, #app.nav-icons .txt, #app.nav-icons .fname, #app.nav-icons .aname, #app.nav-icons .acct-head button,
#app.nav-icons .acct-error { display: none; }
#app.nav-icons .side-top { flex-direction: column; }
#app.nav-icons .folder, #app.nav-icons .folder.sub { justify-content: center; padding: 8px 0; position: relative; }
#app.nav-icons .folder .count {
  position: absolute; top: 1px; right: 4px; font-size: 10px; min-width: 16px; padding: 0 4px; border-radius: 8px;
  background: var(--mint); color: #08302a; text-align: center;
}
#app.nav-icons .acct-head { justify-content: center; cursor: pointer; }
#app.nav-icons .acct { border-top: 1px solid rgb(255 255 255 / .12); padding-top: 6px; }

/* ---------- message list ---------- */
#list-pane { border-right: 1px solid var(--line); background: var(--list-bg); display: flex; flex-direction: column; min-width: 0; min-height: 0; }
.pane-head { display: flex; gap: 6px; padding: 10px; border-bottom: 1px solid var(--line); background: var(--list-head); }
#list-title { padding: 8px 12px 4px; font-weight: 600; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
#messages { list-style: none; margin: 0; padding: 0; overflow-y: auto; flex: 1; }
#messages li { padding: 9px 12px; border-bottom: 1px solid var(--line); cursor: pointer; border-left: 3px solid transparent; }
#messages li:hover { background: var(--hover); }
#messages li.active { background: var(--selected); border-left-color: var(--accent); }
#messages li.unread { border-left-color: var(--mint); }
#messages .top { display: flex; gap: 8px; }
#messages .who { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#messages .when { color: var(--muted); font-size: 12px; white-space: nowrap; }
#messages .subj { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--muted); }
#messages li.unread .who, #messages li.unread .subj { font-weight: 650; color: var(--unread); }
#messages .flag { color: #e0a100; }
#messages .placeholder { color: var(--muted); cursor: default; text-align: center; padding: 30px 12px; border-left: none; }
#more-btn { margin: 6px; }

/* View menu */
.view-wrap { position: relative; }
.menu {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 20; width: 220px; padding: 8px;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; box-shadow: 0 8px 28px rgb(0 0 0 / .18);
}
.menu-title { font-size: 11.5px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); margin: 8px 6px 4px; font-weight: 600; }
.menu-title:first-child { margin-top: 2px; }
.menu label { display: flex; gap: 8px; align-items: center; padding: 5px 6px; border-radius: 6px; cursor: pointer; }
.menu label:hover { background: var(--hover); }
.menu input { width: auto; margin: 0; accent-color: var(--accent); }

/* ---------- reader ---------- */
#reader { overflow: hidden; display: flex; flex-direction: column; min-width: 0; min-height: 0; background: var(--reader-bg); }
.empty { margin: auto; max-width: 420px; text-align: center; color: var(--muted); padding: 24px; }
.empty h2 { color: var(--accent); }
#reader-msg { display: flex; flex-direction: column; height: 100%; min-height: 0; }
.toolbar { display: flex; flex-wrap: wrap; gap: 6px; padding: 10px 16px; border-bottom: 1px solid var(--line); align-items: center; }
.toolbar .sep { width: 8px; }
.toolbar select { width: auto; }
#r-subject { font-size: 20px; margin: 14px 16px 6px; }
.meta { padding: 0 16px 10px; font-size: 13px; }
.banner { margin: 0 16px 8px; padding: 8px 10px; border-radius: 6px; background: var(--hover); font-size: 13px; display: flex; gap: 10px; align-items: center; }
#r-attachments { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 0 16px 8px; padding: 0; }
#r-attachments:empty { display: none; }
#r-attachments button { font-size: 12.5px; }
#r-body { flex: 1; border: none; border-top: 1px solid var(--line); width: 100%; background: #fff; }

/* ---------- dialogs ---------- */
dialog { border: 1px solid var(--line); border-radius: 10px; background: var(--panel); color: var(--text); padding: 18px 20px; width: min(560px, 92vw); }
dialog::backdrop { background: rgb(0 0 0 / .35); }
#compose-dlg { width: min(820px, 94vw); }
dialog h2 { margin: 0 0 10px; font-size: 18px; }
dialog label { display: block; margin: 8px 0; font-size: 12.5px; color: var(--muted); }
dialog label input, dialog label select, dialog label textarea { margin-top: 3px; color: var(--text); font-size: 14px; }
.row { display: flex; gap: 10px; }
.row label { flex: 1; }
.row label.port { flex: 0 0 110px; }
dialog label.check { display: flex; gap: 8px; align-items: center; }
dialog label.check input { width: auto; margin: 0; }
details summary { cursor: pointer; color: var(--accent); margin: 8px 0; }
.actions { display: flex; gap: 8px; margin-top: 12px; align-items: center; }
.editor-bar { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; margin-top: 8px; }
.editor-bar button { padding: 3px 9px; }
.editor-bar .attach { margin: 0; cursor: pointer; color: var(--accent); font-size: 14px; }
#editor { min-height: 260px; max-height: 50vh; overflow-y: auto; border: 1px solid var(--line); border-radius: 6px; padding: 10px; margin-top: 6px; background: var(--panel); }
#editor blockquote { border-left: 3px solid var(--line); margin: 0 0 0 4px; padding-left: 10px; color: var(--muted); }
#compose-files { list-style: none; padding: 0; margin: 6px 0 0; display: flex; flex-wrap: wrap; gap: 6px; }
#compose-files li { background: var(--hover); border-radius: 6px; padding: 3px 8px; font-size: 12.5px; }
#compose-files li button { border: none; background: transparent; padding: 0 0 0 6px; }

/* Settings */
#settings-dlg { width: min(760px, 94vw); padding: 0; overflow: hidden; }
.settings { display: grid; grid-template-columns: 170px 1fr; min-height: 460px; }
.tabs { background: var(--nav-bg); color: var(--nav-text); padding: 16px 10px; display: flex; flex-direction: column; gap: 4px; }
.tabs h2 { font-size: 16px; margin: 0 6px 10px; }
.tabs button { background: transparent; border: none; color: var(--nav-text); text-align: left; padding: 7px 10px; }
.tabs button:hover { background: var(--nav-hover); }
.tabs button.active { background: var(--nav-active); font-weight: 600; }
.tab-body { padding: 16px 20px; display: flex; flex-direction: column; max-height: 80vh; overflow-y: auto; }
.tab-body h3 { font-size: 13px; text-transform: uppercase; letter-spacing: .05em; color: var(--accent); margin: 14px 0 2px; }
.tab-body h3:first-child { margin-top: 0; }
.tab-body section { flex: 1; }
.rows { list-style: none; margin: 0 0 12px; padding: 0; }
.rows li { display: flex; align-items: center; gap: 8px; padding: 8px 4px; border-bottom: 1px solid var(--line); }
.rows li .grow { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rows li button { padding: 3px 9px; font-size: 13px; }
.rows .tag { font-size: 11px; color: var(--muted); border: 1px solid var(--line); border-radius: 10px; padding: 1px 7px; }
.new-folder input { flex: 1; }
.new-folder button { flex: none; }
.about { display: flex; gap: 16px; align-items: flex-start; }
.about img { border-radius: 14px; }
.about h3 { text-transform: none; letter-spacing: 0; font-size: 18px; color: var(--text); }
#password-dlg { width: min(460px, 92vw); }
.side-link { display: flex; align-items: center; justify-content: center; gap: 6px; color: var(--nav-text) !important; }
.side-link:hover { background: var(--nav-hover); }
#sidebar .grow { min-height: 8px; }

/* Right-click menu and drag-and-drop */
.menu.ctx { position: fixed; width: 190px; }
.menu.ctx button { display: block; width: 100%; text-align: left; border: none; background: transparent; padding: 6px 8px; }
.menu.ctx button:hover { background: var(--hover); }
.menu.ctx button.danger { color: var(--danger); }
.menu.time { width: 250px; z-index: 40; }
.menu.time input { margin: 4px 0 8px; }
.menu.time #time-set { width: 100%; }
#messages .when.sched { color: var(--accent); font-weight: 600; }
.folder .ftools { display: none; gap: 2px; }
.folder:hover .ftools { display: flex; }
.folder .ftools button { border: none; background: transparent; color: var(--nav-text); padding: 0 4px; font-size: 13px; line-height: 1.4; }
.folder .ftools button:hover { background: var(--nav-hover); }
#app.nav-icons .folder .ftools { display: none; }
.new-folder-row { color: var(--nav-muted); font-size: 13px; }
.new-folder-row:hover { color: var(--nav-text); }
.folder.drop { outline: 2px dashed var(--mint); outline-offset: -2px; }
#messages li.dragging { opacity: .5; }

#toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--panel); padding: 8px 14px; border-radius: 8px; font-size: 13px; z-index: 30; max-width: 80vw; }

@media (max-width: 1100px) { #app { --nav-w: 200px; --list-w: 320px; } #app.nav-icons { --nav-w: 64px; } }