/* mail.0n1x.ru — single-file CSS, no CDN */
:root {
  color-scheme: light dark;
  --bg: #f6f7fb;
  --bg-elev: #ffffff;
  --bg-dim: #eef0f6;
  --fg: #1a1f2c;
  --fg-dim: #6b7280;
  --primary: #4f46e5;
  --primary-fg: #ffffff;
  --primary-dim: #e0e7ff;
  --danger: #dc2626;
  --border: #e3e6ee;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(20, 24, 40, .04), 0 1px 3px rgba(20, 24, 40, .06);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1015;
    --bg-elev: #161922;
    --bg-dim: #1d2230;
    --fg: #ecf0fa;
    --fg-dim: #9aa3b8;
    --primary: #818cf8;
    --primary-fg: #0e1015;
    --primary-dim: #1f2438;
    --border: #232938;
    --shadow: 0 1px 2px rgba(0, 0, 0, .35), 0 1px 3px rgba(0, 0, 0, .25);
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  font-size: 15px;
  line-height: 1.5;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
small, .small { font-size: 12px; }
.muted { color: var(--fg-dim); }

/* topbar */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px; background: var(--bg-elev); border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar .brand { display: flex; align-items: center; gap: 8px; color: var(--fg); }
.topbar .dot { width: 12px; height: 12px; border-radius: 50%; background: var(--primary); display: inline-block; }
.topbar-nav { display: flex; gap: 18px; }
.topbar-nav a { color: var(--fg-dim); }
.topbar-nav a:hover { color: var(--fg); text-decoration: none; }
.user-label { color: var(--fg-dim); font-size: 14px; }

/* layout */
.container { max-width: 1100px; margin: 0 auto; padding: 32px 24px; }
.container.narrow { max-width: 540px; }
.page-head h1 { margin: 0 0 8px; font-size: 28px; }
.page-head p { margin: 0; }

.app-shell {
  display: grid;
  grid-template-columns: 260px 1fr;
  min-height: calc(100vh - 56px);
}
.sidebar {
  background: var(--bg-elev);
  border-right: 1px solid var(--border);
  padding: 20px 16px;
  display: flex; flex-direction: column; gap: 16px;
}
.mailbox-pill {
  background: var(--bg-dim); padding: 12px; border-radius: var(--radius-sm);
}
.mailbox-pill-label { color: var(--fg-dim); font-size: 12px; text-transform: uppercase; letter-spacing: .05em; }
.mailbox-pill strong { display: block; word-break: break-all; margin-top: 4px; }

.folders { display: flex; flex-direction: column; gap: 4px; margin-top: 8px; }
.folder {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 12px; border-radius: var(--radius-sm); color: var(--fg);
}
.folder small { color: var(--fg-dim); }
.folder:hover { background: var(--bg-dim); text-decoration: none; }
.folder.active { background: var(--primary-dim); color: var(--primary); }
.folder.active small { color: var(--primary); }
.back-link { color: var(--fg-dim); margin-top: auto; }

.main-pane { padding: 24px 28px; }
.pane-head {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-bottom: 16px; border-bottom: 1px solid var(--border); margin-bottom: 16px;
}
.pane-head h1 { margin: 0; font-size: 22px; }

/* cards */
.card {
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow);
}
.card + .card { margin-top: 24px; }
.card-title { margin: 0 0 16px; font-size: 18px; }
.grid.two-col { display: grid; grid-template-columns: 1.6fr 1fr; gap: 24px; }
@media (max-width: 880px) { .grid.two-col { grid-template-columns: 1fr; } .app-shell { grid-template-columns: 1fr; } .sidebar { border-right: none; border-bottom: 1px solid var(--border); } }

/* forms */
.form { display: flex; flex-direction: column; gap: 14px; }
.form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--fg-dim); }
.form input, .form textarea, .form select {
  font: inherit; padding: 10px 12px; border: 1px solid var(--border);
  border-radius: var(--radius-sm); background: var(--bg); color: var(--fg);
}
.form input:focus, .form textarea:focus, .form select:focus {
  outline: 2px solid var(--primary); outline-offset: 1px; border-color: transparent;
}
.input-group { display: flex; align-items: stretch; gap: 6px; }
.input-group .at { display: flex; align-items: center; padding: 0 4px; color: var(--fg-dim); }
.input-group input, .input-group select { flex: 1; }
.inline-form { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 16px; }
.inline { display: inline; }
.compose-form textarea { font-family: ui-monospace, SFMono-Regular, Consolas, monospace; }

/* buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 9px 14px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--bg-elev); color: var(--fg); cursor: pointer; font: inherit;
  text-decoration: none; transition: background .15s, transform .05s;
}
.btn:hover { background: var(--bg-dim); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: var(--primary-fg); border-color: transparent; }
.btn-primary:hover { background: var(--primary); filter: brightness(1.1); }
.btn-block { display: flex; width: 100%; }
.btn-sm { padding: 5px 10px; font-size: 13px; }
.btn.danger, .btn-icon.danger { color: var(--danger); border-color: rgba(220,38,38,.4); }
.btn-icon { background: transparent; border: 1px solid transparent; padding: 6px 10px; cursor: pointer; font-size: 18px; color: var(--fg-dim); }
.form-actions { display: flex; gap: 8px; }

/* mailbox list */
.mailbox-list { list-style: none; margin: 0; padding: 0; }
.mailbox-item { display: flex; align-items: center; padding: 8px 6px; border-bottom: 1px solid var(--border); }
.mailbox-item:last-child { border-bottom: none; }
.mailbox-link { display: flex; align-items: center; gap: 12px; flex: 1; color: var(--fg); }
.mailbox-link:hover { text-decoration: none; }
.mailbox-avatar {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--primary-dim); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-weight: 600;
}
.mailbox-meta { display: flex; flex-direction: column; }
.mailbox-meta strong { font-size: 14px; }
.mailbox-email { color: var(--fg-dim); font-size: 13px; }

.badge {
  background: var(--primary); color: var(--primary-fg);
  border-radius: 999px; padding: 2px 8px; font-size: 11px; font-weight: 600;
}

/* message list */
.msg-list { list-style: none; margin: 0; padding: 0; }
.msg-row { border-bottom: 1px solid var(--border); transition: background .12s; }
.msg-row:hover { background: var(--bg-dim); }
.msg-row.unread { background: var(--primary-dim); }
.msg-row.unread:hover { background: var(--primary-dim); filter: brightness(.97); }
.msg-link {
  display: grid; grid-template-columns: 220px 1fr 130px; gap: 16px;
  align-items: center; padding: 10px 14px; color: var(--fg);
}
.msg-link:hover { text-decoration: none; }
.msg-from strong { display: block; font-size: 14px; }
.msg-subject { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.msg-meta { text-align: right; }
.star { color: #f59e0b; margin-right: 4px; }

/* message view */
.msg-actions { display: flex; gap: 8px; }
.message-view { background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); }
.message-subject { margin: 0 0 16px; font-size: 22px; }
.message-headers { display: flex; flex-direction: column; gap: 4px; padding-bottom: 16px; border-bottom: 1px solid var(--border); margin-bottom: 16px; color: var(--fg-dim); font-size: 13px; }
.hdr-label { color: var(--fg-dim); display: inline-block; min-width: 50px; }
.message-body { font-size: 15px; }
.text-body { white-space: pre-wrap; word-wrap: break-word; font: 14px ui-monospace, SFMono-Regular, Consolas, monospace; }
.html-body { line-height: 1.6; }
.html-body img { max-width: 100%; height: auto; }
.attachments { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border); }
.attachments ul { list-style: none; padding: 0; margin: 0; }
.attachments li { padding: 6px 0; }

/* tables */
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; font-size: 14px; }
.table th { color: var(--fg-dim); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
.pill { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.pill.ok { background: rgba(16,185,129,.15); color: rgb(16,185,129); }
.pill.off { background: rgba(220,38,38,.15); color: rgb(220,38,38); }

/* empty / error */
.empty-state { text-align: center; padding: 60px 20px; color: var(--fg-dim); }
.error-card {
  background: var(--bg-elev); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px; text-align: center; box-shadow: var(--shadow);
}
.error-code { font-size: 56px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; }
.alert.error { background: rgba(220,38,38,.12); color: var(--danger); border: 1px solid rgba(220,38,38,.3); }

/* login page */
.login-page {
  min-height: 100vh;
  display: flex; align-items: center; justify-content: center;
  padding: 24px;
}
.login-card {
  width: 100%; max-width: 380px;
  background: var(--bg-elev); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; box-shadow: var(--shadow);
}
.login-title {
  display: flex; align-items: center; gap: 10px;
  margin: 0 0 8px; font-size: 22px;
}
.login-title .dot { width: 14px; height: 14px; border-radius: 50%; background: var(--primary); display: inline-block; }
.login-foot { margin-top: 16px; text-align: center; }

/* topbar logout button */
.topbar-user form { margin: 0; }
.topbar-user .btn-link {
  background: transparent; border: none; color: var(--fg-dim);
  cursor: pointer; font: inherit; padding: 0 0 0 12px;
}
.topbar-user .btn-link:hover { color: var(--fg); text-decoration: underline; }
.topbar-user { display: flex; align-items: center; gap: 6px; }

/* admin pill (admin flag column) */
.pill.admin { background: rgba(99,102,241,.15); color: rgb(99,102,241); }