/* Inbox Queue: light & dark themes, 3-pane desktop, single-pane phone */
:root {
  --bg: #F3F4F6; --panel: #FFFFFF; --panel2: #FAFAFB; --line: #E3E5EA; --line2: #D5D8DF;
  --text: #15171C; --sub: #555C69; --faint: #6A717D;
  --sel: #EAF0FF; --hover: #F4F6FA; --chip: #EEF0F3;
  --accent: #2F5BEA; --accent-ink: #FFFFFF; --accent-soft: #E3EAFF;
  --danger: #B42318; --ok: #15803D; --warn-bg: #FFF4E5; --warn-ink: #8A4B00;
  --shadow: 0 1px 2px rgba(16,24,40,.06), 0 8px 24px rgba(16,24,40,.08);
  --radius: 10px;
  --font: 'Geist', ui-sans-serif, system-ui, -apple-system, 'Segoe UI', sans-serif;
  --mono: 'Geist Mono', ui-monospace, 'SF Mono', Menlo, monospace;
  color-scheme: light;
}
:root[data-theme="dark"] {
  --bg: #0E1014; --panel: #15181E; --panel2: #1A1E26; --line: #272C36; --line2: #343A46;
  --text: #E9EBEF; --sub: #A3AAB6; --faint: #8A919D;
  --sel: #1E2A42; --hover: #1C2029; --chip: #222731;
  --accent: #7EA6FF; --accent-ink: #0E1014; --accent-soft: #1E2A42;
  --danger: #F97066; --ok: #4ADE80; --warn-bg: #3A2A12; --warn-ink: #FFD08A;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 32px rgba(0,0,0,.45);
  color-scheme: dark;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0E1014; --panel: #15181E; --panel2: #1A1E26; --line: #272C36; --line2: #343A46;
    --text: #E9EBEF; --sub: #A3AAB6; --faint: #8A919D;
    --sel: #1E2A42; --hover: #1C2029; --chip: #222731;
    --accent: #7EA6FF; --accent-ink: #0E1014; --accent-soft: #1E2A42;
    --danger: #F97066; --ok: #4ADE80; --warn-bg: #3A2A12; --warn-ink: #FFD08A;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 12px 32px rgba(0,0,0,.45);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.45 var(--font); -webkit-font-smoothing: antialiased; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }
svg { flex: none; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

/* ---------- buttons ---------- */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 40px; padding: 0 14px; border-radius: 9px;
  border: 1px solid var(--line); background: var(--panel); color: var(--text); font-size: 13.5px; font-weight: 500; cursor: pointer; text-decoration: none; white-space: nowrap; }
.btn:hover { background: var(--hover); }
.btn:disabled { opacity: .55; cursor: default; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 600; }
.btn-primary:hover { background: var(--accent); filter: brightness(1.06); }
.btn-ghost { border-color: transparent; background: transparent; }
.btn-danger { color: var(--danger); }
.btn-lg { height: 48px; padding: 0 22px; font-size: 15px; }
.btn-sm { height: 32px; padding: 0 10px; font-size: 12.5px; }
.icon-btn { width: 40px; padding: 0; }
.icon-btn.btn-sm { width: 32px; }
.kbd { font-family: var(--mono); font-size: 11px; opacity: .7; }

/* ---------- login ---------- */
.login { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-card { background: var(--panel); border: 1px solid var(--line); border-radius: 16px; padding: 40px 32px; max-width: 400px; width: 100%; text-align: center; box-shadow: var(--shadow); }
.login-card h1 { margin: 16px 0 6px; font-size: 24px; letter-spacing: -.02em; }
.login-card p { margin: 0 0 24px; color: var(--sub); }
.login-card .fine { margin: 18px 0 0; font-size: 12.5px; color: var(--faint); }
.brand-mark { width: 40px; height: 40px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); display: inline-flex; align-items: center; justify-content: center; }

/* ---------- app frame ---------- */
.app { height: 100vh; height: 100dvh; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; gap: 12px; padding: 10px 16px; background: var(--panel); border-bottom: 1px solid var(--line); min-height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; letter-spacing: -.01em; min-width: 196px; }
.brand .brand-mark { width: 30px; height: 30px; border-radius: 8px; }
.search { flex: 1 1 auto; max-width: 680px; display: flex; align-items: center; gap: 8px; height: 40px; padding: 0 12px; border-radius: 10px; background: var(--chip); border: 1px solid transparent; }
.search:focus-within { border-color: var(--accent); background: var(--panel); }
.search input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; font-size: 14px; }
.search .kbd { border: 1px solid var(--line2); border-radius: 5px; padding: 1px 6px; }
.top-actions { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.menu-btn { display: none; }

.main { flex: 1; min-height: 0; display: flex; }
.sidebar { width: 248px; flex: none; overflow-y: auto; padding: 14px 10px 24px; background: var(--panel2); border-right: 1px solid var(--line); }
.listpane { width: 470px; flex: none; min-width: 0; display: flex; flex-direction: column; background: var(--panel); border-right: 1px solid var(--line); }
.reader { flex: 1; min-width: 0; display: flex; flex-direction: column; background: var(--panel); overflow: hidden; }

/* ---------- sidebar ---------- */
.nav-item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 8px 12px; border-radius: 9px; border: 0; background: transparent; color: var(--sub); text-align: left; cursor: pointer; text-decoration: none; min-height: 38px; }
.nav-item:hover { background: var(--hover); color: var(--text); }
.nav-item.active { background: var(--sel); color: var(--text); font-weight: 600; }
.nav-item .grow { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.nav-item .count { font-family: var(--mono); font-size: 12px; color: var(--sub); }
.nav-item.primary .count { background: var(--accent); color: var(--accent-ink); padding: 1px 8px; border-radius: 99px; }
.nav-section { margin: 18px 12px 6px; font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--faint); display: flex; align-items: center; }
.acct { display: flex; align-items: center; gap: 10px; }
.acct-dot { width: 10px; height: 10px; border-radius: 3px; flex: none; }
.acct-lines { flex: 1; min-width: 0; }
.acct-lines .name { display: block; color: var(--text); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.acct-lines .mail { display: block; font-size: 12px; color: var(--faint); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 400; }
.sub-nav { margin: 2px 0 6px 22px; border-left: 1px solid var(--line); padding-left: 6px; }
.sub-nav .nav-item { min-height: 32px; padding: 6px 10px; font-size: 13px; }
.label-dot { width: 8px; height: 8px; border-radius: 99px; flex: none; background: var(--faint); }
.warn-dot { width: 8px; height: 8px; border-radius: 99px; background: var(--danger); }

/* ---------- list pane ---------- */
.list-head { padding: 16px 16px 10px; border-bottom: 1px solid var(--line); display: flex; flex-direction: column; gap: 10px; }
.list-title { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; }
.list-title h1 { margin: 0; font-size: 21px; font-weight: 700; letter-spacing: -.02em; }
.list-title .meta { color: var(--sub); font-size: 13px; }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip { height: 30px; padding: 0 11px; border-radius: 99px; border: 1px solid var(--line); background: var(--panel); color: var(--text); font-size: 12.5px; font-weight: 500; display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.chip.on { background: var(--text); color: var(--panel); border-color: var(--text); }
.chip .acct-dot { width: 8px; height: 8px; }
.chip .n { font-family: var(--mono); font-size: 11px; opacity: .7; }
.banner { margin: 10px 16px 0; padding: 10px 12px; border-radius: 9px; background: var(--warn-bg); color: var(--warn-ink); font-size: 13px; display: flex; align-items: center; gap: 10px; }
.banner .btn { margin-left: auto; height: 30px; }
.list { flex: 1; overflow-y: auto; overscroll-behavior: contain; position: relative; }
.row { display: flex; align-items: stretch; gap: 10px; padding: 11px 14px 11px 6px; border-bottom: 1px solid var(--line); background: var(--panel); cursor: pointer; position: relative; user-select: none; -webkit-user-select: none; }
.row:hover { background: var(--hover); }
.row.selected { background: var(--sel); }
.row.read .from, .row.read .subject { font-weight: 500; }
.grip { width: 24px; display: flex; flex-direction: column; align-items: center; gap: 5px; padding-top: 2px; color: var(--faint); cursor: grab; touch-action: none; }
.grip .rank { font-family: var(--mono); font-size: 11px; }
.stripe { width: 4px; border-radius: 4px; flex: none; }
.row-body { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.line1 { display: flex; align-items: baseline; gap: 8px; }
.from { font-weight: 700; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.from .n { font-weight: 400; color: var(--faint); font-size: 12px; }
.acct-tag { font-size: 12px; color: var(--faint); white-space: nowrap; }
.date { margin-left: auto; font-family: var(--mono); font-size: 12px; color: var(--sub); white-space: nowrap; padding-left: 6px; }
.subject { font-weight: 600; font-size: 13.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.snippet { font-size: 13px; color: var(--sub); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 4px; align-items: center; }
.tag { font-size: 11.5px; font-weight: 600; padding: 1px 8px; border-radius: 6px; background: var(--chip); color: var(--sub); white-space: nowrap; }
.new-dot { width: 8px; height: 8px; border-radius: 99px; background: var(--accent); display: inline-block; margin-right: 2px; flex: none; align-self: center; }
.row-icons { display: inline-flex; gap: 4px; color: var(--faint); align-items: center; }
.star-on { color: #E8A100; }
.row.drag-source { opacity: .35; }
.drag-ghost { position: fixed; z-index: 1000; pointer-events: none; box-shadow: var(--shadow); border-radius: 10px; border: 1px solid var(--line2); opacity: .97; transform-origin: 30px 20px; }
body.dragging, body.dragging * { cursor: grabbing !important; }
.list-foot { padding: 16px; display: flex; justify-content: center; }
.empty { padding: 56px 24px; text-align: center; color: var(--sub); }
.empty h2 { color: var(--text); font-size: 18px; margin: 0 0 6px; }
.skeleton .bar { height: 10px; border-radius: 6px; background: var(--chip); margin: 6px 0; }

/* ---------- reader ---------- */
.reader-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; padding: 10px 20px; border-bottom: 1px solid var(--line); min-height: 61px; }
.reader-bar .spacer { flex: 1; }
.reader-bar .pos { font-size: 12.5px; color: var(--faint); white-space: nowrap; }
.back-btn { display: none; }
.reader-scroll { flex: 1; overflow-y: auto; overscroll-behavior: contain; }
.thread { padding: 24px 28px 48px; max-width: 920px; }
.thread-subject { margin: 0 0 10px; font-size: 22px; font-weight: 700; letter-spacing: -.015em; line-height: 1.3; overflow-wrap: anywhere; }
.thread-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 18px; }
.acct-pill { display: inline-flex; align-items: center; gap: 6px; font-size: 12.5px; font-weight: 600; padding: 3px 10px; border-radius: 7px; background: var(--chip); }
.msg { border: 1px solid var(--line); border-radius: 12px; margin-bottom: 12px; background: var(--panel); overflow: hidden; }
.msg-head { display: flex; align-items: flex-start; gap: 12px; padding: 14px 16px; cursor: pointer; }
.avatar { width: 38px; height: 38px; border-radius: 99px; background: var(--chip); color: var(--sub); display: flex; align-items: center; justify-content: center; font-weight: 700; flex: none; }
.msg-who { flex: 1; min-width: 0; }
.msg-who .n { font-weight: 600; }
.msg-who .e { color: var(--faint); font-size: 12.5px; margin-left: 4px; }
.msg-who .to { color: var(--faint); font-size: 12.5px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.msg-who .snip { color: var(--sub); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.msg-date { font-family: var(--mono); font-size: 12px; color: var(--sub); white-space: nowrap; }
.msg-actions { display: flex; gap: 2px; }
.msg-body { padding: 0 16px 16px; }
.mail-frame { width: 100%; border: 0; display: block; background: #fff; border-radius: 8px; min-height: 40px; }
.quote-toggle { margin-top: 8px; }
.files { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }
.file { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 9px; text-decoration: none; color: var(--text); font-size: 13px; max-width: 280px; }
.file:hover { background: var(--hover); }
.file .fn { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file .fs { color: var(--faint); font-size: 12px; }
.msg.unread-msg { border-color: var(--accent); }
.reader-empty { flex: 1; display: flex; align-items: center; justify-content: center; color: var(--sub); padding: 48px; text-align: center; }

/* ---------- composer ---------- */
.composer { border: 1px solid var(--line2); border-radius: 12px; background: var(--panel2); margin-top: 8px; display: flex; flex-direction: column; }
.composer.floating { position: fixed; right: 24px; bottom: 24px; width: min(640px, calc(100vw - 32px)); max-height: calc(100vh - 48px); z-index: 50; box-shadow: var(--shadow); background: var(--panel); }
.composer .c-head { display: flex; align-items: center; gap: 8px; padding: 10px 14px; border-bottom: 1px solid var(--line); font-weight: 600; }
.composer .c-head .spacer { flex: 1; }
.c-field { display: flex; align-items: center; gap: 8px; padding: 6px 14px; border-bottom: 1px solid var(--line); min-height: 42px; }
.c-field label { width: 52px; color: var(--sub); font-size: 13px; flex: none; }
.c-field input, .c-field select { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; font-size: 14px; padding: 6px 0; }
.c-field select { cursor: pointer; }
.c-field .toggles { display: flex; gap: 4px; }
.c-body { min-height: 140px; max-height: 50vh; overflow-y: auto; padding: 14px; outline: 0; font-size: 14.5px; line-height: 1.55; overflow-wrap: anywhere; }
.composer.floating .c-body { min-height: 220px; }
.c-body:empty::before { content: attr(data-placeholder); color: var(--faint); }
.c-sig { padding: 0 14px 10px; font-size: 13px; color: var(--faint); white-space: pre-line; }
.c-opts { display: flex; flex-wrap: wrap; gap: 14px; padding: 0 14px 10px; font-size: 13px; color: var(--sub); }
.c-opts label { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; }
.c-files { display: flex; flex-wrap: wrap; gap: 6px; padding: 0 14px 10px; }
.c-file { display: inline-flex; align-items: center; gap: 6px; padding: 4px 6px 4px 10px; border-radius: 7px; background: var(--chip); font-size: 12.5px; }
.c-foot { display: flex; align-items: center; gap: 6px; padding: 10px 14px; border-top: 1px solid var(--line); flex-wrap: wrap; }
.c-foot .spacer { flex: 1; }
.fmt-btn { width: 32px; height: 32px; border-radius: 7px; border: 0; background: transparent; color: var(--sub); cursor: pointer; display: inline-flex; align-items: center; justify-content: center; }
.fmt-btn:hover { background: var(--hover); color: var(--text); }

/* ---------- menus, modals, toasts ---------- */
.popover { position: fixed; z-index: 200; min-width: 220px; max-width: 320px; max-height: 70vh; overflow-y: auto; background: var(--panel); border: 1px solid var(--line2); border-radius: 12px; box-shadow: var(--shadow); padding: 6px; }
.popover .item { display: flex; align-items: center; gap: 10px; width: 100%; padding: 9px 10px; border: 0; background: transparent; border-radius: 8px; text-align: left; cursor: pointer; font-size: 13.5px; min-height: 40px; }
.popover .item:hover, .popover .item:focus-visible { background: var(--hover); }
.popover .item .hint { margin-left: auto; color: var(--faint); font-size: 12px; font-family: var(--mono); }
.popover .sep { height: 1px; background: var(--line); margin: 6px 4px; }
.popover .ph { padding: 8px 10px 4px; font-size: 11px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--faint); }
.popover input[type=datetime-local] { width: 100%; padding: 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel2); margin: 4px 0; }
.check { width: 16px; height: 16px; border-radius: 4px; border: 1.5px solid var(--line2); display: inline-flex; align-items: center; justify-content: center; flex: none; }
.check.on { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.scrim { position: fixed; inset: 0; background: rgba(10,12,16,.45); z-index: 150; display: flex; align-items: center; justify-content: center; padding: 16px; }
.modal { background: var(--panel); border: 1px solid var(--line); border-radius: 14px; box-shadow: var(--shadow); width: min(560px, 100%); max-height: calc(100vh - 32px); overflow-y: auto; padding: 24px; }
.modal h2 { margin: 0 0 6px; font-size: 19px; }
.modal p { color: var(--sub); margin: 0 0 16px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 20px; }
.toasts { position: fixed; left: 50%; bottom: 24px; transform: translateX(-50%); z-index: 300; display: flex; flex-direction: column; gap: 8px; align-items: center; pointer-events: none; }
.toast { pointer-events: auto; background: var(--text); color: var(--panel); padding: 10px 12px 10px 16px; border-radius: 10px; box-shadow: var(--shadow); display: flex; align-items: center; gap: 12px; font-size: 13.5px; max-width: calc(100vw - 32px); }
.toast button { background: transparent; border: 0; color: var(--accent); font-weight: 700; cursor: pointer; padding: 6px 8px; border-radius: 6px; }
:root:not([data-theme="dark"]) .toast button { color: #9DB8FF; }
.toast.err { background: var(--danger); color: #fff; }

/* settings */
.settings { padding: 24px 28px 48px; max-width: 760px; }
.settings h1 { font-size: 22px; margin: 0 0 4px; }
.settings h2 { font-size: 15px; margin: 28px 0 10px; }
.settings .muted { color: var(--sub); margin: 0 0 12px; }
.acct-card { display: flex; align-items: center; gap: 12px; padding: 12px; border: 1px solid var(--line); border-radius: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.acct-card input[type=color] { width: 36px; height: 36px; border: 1px solid var(--line); border-radius: 8px; padding: 2px; background: var(--panel); cursor: pointer; }
.acct-card input[type=text] { flex: 1 1 160px; min-width: 0; height: 36px; padding: 0 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel2); }
.acct-card .mail { color: var(--faint); font-size: 12.5px; flex: 1 1 100%; order: 3; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 9px; overflow: hidden; }
.seg button { border: 0; background: var(--panel); padding: 8px 14px; cursor: pointer; }
.seg button.on { background: var(--sel); font-weight: 600; }
.shortcuts { display: grid; grid-template-columns: auto 1fr; gap: 6px 16px; font-size: 13.5px; }
.shortcuts kbd { font-family: var(--mono); font-size: 12px; background: var(--chip); border: 1px solid var(--line); border-radius: 5px; padding: 1px 6px; justify-self: start; }

/* ---------- responsive ---------- */
@media (max-width: 1280px) {
  .listpane { width: 400px; }
  .brand { min-width: 0; }
}
@media (max-width: 1080px) {
  .sidebar { position: fixed; top: 0; bottom: 0; left: 0; z-index: 120; width: 280px; transform: translateX(-105%); transition: transform .2s ease; }
  .app.nav-open .sidebar { transform: none; box-shadow: var(--shadow); }
  .app.nav-open::after { content: ''; position: fixed; inset: 0; background: rgba(10,12,16,.4); z-index: 110; }
  .menu-btn { display: inline-flex; }
  .brand .label { display: none; }
}
@media (max-width: 820px) {
  .topbar { padding: 8px 10px; gap: 8px; }
  .search .kbd, .compose-label, .hide-sm, .brand, .reader-bar .pos, .reader-bar [data-act="reply"], .msg-who .e { display: none; }
  .reader-bar { gap: 5px; }
  .listpane { width: 100%; border-right: 0; }
  .reader { display: none; }
  .app[data-pane="reader"] .listpane { display: none; }
  .app[data-pane="reader"] .reader { display: flex; }
  .back-btn { display: inline-flex; }
  .reader-bar { padding: 8px 10px; }
  .thread, .settings { padding: 16px 14px 40px; }
  .msg-head { padding: 12px; }
  .msg-body { padding: 0 10px 12px; }
  .composer.floating { inset: 0; width: 100%; max-height: none; border-radius: 0; right: 0; bottom: 0; }
  .composer.floating .c-body { flex: 1; max-height: none; }
  .row { padding-right: 12px; }
  .toasts { bottom: max(16px, env(safe-area-inset-bottom)); }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }