/* ===================================================================
   «Почта и связь» — стиль страницы регистрации
   Чистый минимализм. CSS-переменные для тёмной/светлой темы.
   =================================================================== */

:root {
  /* Светлая тема (по умолчанию) */
  --bg: #ffffff;
  --bg-soft: #f7f8fa;
  --bg-card: #ffffff;
  --text: #1a1d23;
  --text-soft: #5b616e;
  --text-muted: #8a909c;
  --border: #e4e7ec;
  --primary: #3b5bdb;
  --primary-hover: #2f49b0;
  --primary-soft: #edf0ff;
  --success: #2f9e44;
  --success-soft: #e7f5ec;
  --warning: #e8590c;
  --warning-soft: #fdf3ea;
  --danger: #e03131;
  --danger-soft: #fdeded;
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 12px rgba(0,0,0,0.04);
  --radius: 10px;
  --radius-sm: 6px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --bg-soft: #181b22;
    --bg-card: #1a1d24;
    --text: #e8eaed;
    --text-soft: #b4bac4;
    --text-muted: #7a818f;
    --border: #2a2e38;
    --primary: #5b73e8;
    --primary-hover: #7588ed;
    --primary-soft: #1f2335;
    --success: #4cb866;
    --success-soft: #1a2e22;
    --warning: #ff8c3a;
    --warning-soft: #2f2418;
    --danger: #f15555;
    --danger-soft: #2e1c1c;
    --shadow: 0 1px 3px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.2);
  }
}

/* Принудительная тема через data-theme (для переключателя) */
[data-theme="light"] { --bg:#ffffff; --bg-soft:#f7f8fa; --bg-card:#ffffff; --text:#1a1d23; --text-soft:#5b616e; --text-muted:#8a909c; --border:#e4e7ec; --primary:#3b5bdb; --primary-hover:#2f49b0; --primary-soft:#edf0ff; --success:#2f9e44; --success-soft:#e7f5ec; --warning:#e8590c; --warning-soft:#fdf3ea; --danger:#e03131; --danger-soft:#fdeded; --shadow:0 1px 3px rgba(0,0,0,0.04),0 4px 12px rgba(0,0,0,0.04); }
[data-theme="dark"]  { --bg:#0f1115; --bg-soft:#181b22; --bg-card:#1a1d24; --text:#e8eaed; --text-soft:#b4bac4; --text-muted:#7a818f; --border:#2a2e38; --primary:#5b73e8; --primary-hover:#7588ed; --primary-soft:#1f2335; --success:#4cb866; --success-soft:#1a2e22; --warning:#ff8c3a; --warning-soft:#2f2418; --danger:#f15555; --danger-soft:#2e1c1c; --shadow:0 1px 3px rgba(0,0,0,0.3),0 4px 12px rgba(0,0,0,0.2); }

* { box-sizing: border-box; margin: 0; padding: 0; }

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-hover); text-decoration: underline; }

/* ---------- Layout ---------- */
.container {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}
.container-wide {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* ---------- Header ---------- */
.topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 12px 20px;
  position: sticky; top: 0; z-index: 10;
}
.topbar-inner {
  max-width: 1100px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
}
.brand { font-weight: 600; font-size: 16px; color: var(--text); }
.brand a { color: inherit; text-decoration: none; }
.brand a:hover { text-decoration: none; color: var(--primary); }
.topbar nav { display: flex; gap: 16px; align-items: center; }
.topbar nav a { color: var(--text-soft); font-size: 14px; text-decoration: none; }
.topbar nav a:hover, .topbar nav a.active { color: var(--primary); }
.topbar .user-badge {
  background: var(--primary-soft); color: var(--primary);
  padding: 4px 10px; border-radius: 20px; font-size: 13px;
}

/* ---------- Hero / landing ---------- */
.hero { text-align: center; padding: 60px 20px 40px; }
.hero h1 { font-size: 32px; font-weight: 700; margin-bottom: 12px; letter-spacing: -0.5px; }
.hero p { color: var(--text-soft); font-size: 17px; max-width: 480px; margin: 0 auto 32px; }

/* ---------- Card ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
}
.card + .card { margin-top: 16px; }
.card h2 { font-size: 20px; font-weight: 600; margin-bottom: 8px; }
.card-sub { color: var(--text-soft); font-size: 14px; margin-bottom: 20px; }

/* ---------- Forms ---------- */
label { display: block; font-size: 14px; font-weight: 500; color: var(--text-soft); margin-bottom: 6px; }
input[type="text"], input[type="password"], input[type="email"], select, textarea {
  width: 100%; padding: 12px 14px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text); font-size: 15px;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
.field { margin-bottom: 18px; }
.field-hint { font-size: 12px; color: var(--text-muted); margin-top: 4px; }
.field-error { font-size: 13px; color: var(--danger); margin-top: 4px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; padding: 11px 20px;
  border: 1px solid transparent; border-radius: var(--radius-sm);
  background: var(--primary); color: #fff;
  font-size: 15px; font-weight: 500; font-family: inherit;
  cursor: pointer; text-decoration: none;
  transition: background 0.15s;
}
.btn:hover { background: var(--primary-hover); color: #fff; text-decoration: none; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-secondary { background: var(--bg-soft); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { background: var(--border); color: var(--text); }
.btn-danger { background: var(--danger); }
.btn-danger:hover { background: #c02525; }
.btn-success { background: var(--success); }
.btn-success:hover { background: #257a35; }
.btn-block { display: block; width: 100%; text-align: center; }
.btn-sm { padding: 6px 12px; font-size: 13px; }

/* ---------- Alerts ---------- */
.alert { padding: 12px 16px; border-radius: var(--radius-sm); margin-bottom: 16px; font-size: 14px; }
.alert-error { background: var(--danger-soft); color: var(--danger); border: 1px solid var(--danger); }
.alert-success { background: var(--success-soft); color: var(--success); border: 1px solid var(--success); }
.alert-warning { background: var(--warning-soft); color: var(--warning); border: 1px solid var(--warning); }
.alert-info { background: var(--primary-soft); color: var(--primary); border: 1px solid var(--primary); }

/* ---------- Badge ---------- */
.badge { display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 12px; font-weight: 500; }
.badge-admin { background: var(--primary-soft); color: var(--primary); }
.badge-mod { background: var(--warning-soft); color: var(--warning); }
.badge-active { background: var(--success-soft); color: var(--success); }
.badge-blocked { background: var(--danger-soft); color: var(--danger); }
.badge-root { background: #ffeaa7; color: #6c5ce7; }

/* ---------- List ---------- */
.list { list-style: none; }
.list-item {
  display: flex; justify-content: space-between; align-items: center;
  padding: 14px 0; border-bottom: 1px solid var(--border);
}
.list-item:last-child { border-bottom: none; }
.list-item .meta { color: var(--text-muted); font-size: 13px; }

/* ---------- Invite link box ---------- */
.invite-link-box {
  display: flex; gap: 8px; align-items: center;
  padding: 12px; background: var(--bg-soft); border-radius: var(--radius-sm);
  border: 1px dashed var(--border);
  margin-bottom: 12px;
}
.invite-link-box code {
  flex: 1; font-family: "SF Mono", Monaco, Consolas, monospace;
  font-size: 13px; color: var(--text); word-break: break-all;
}

/* ---------- QR ---------- */
#qrcode { margin: 16px auto; display: block; background: #fff; padding: 12px; border-radius: 8px; }

/* ---------- Password strength ---------- */
.strength { height: 4px; border-radius: 2px; background: var(--border); margin-top: 6px; overflow: hidden; }
.strength-bar { height: 100%; width: 0; transition: width 0.3s, background 0.3s; }

/* ---------- Client cards (onboarding) ---------- */
.client-grid { display: grid; gap: 16px; }
.client-card {
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 20px; background: var(--bg-card);
}
.client-card.recommended { border-color: var(--primary); border-width: 2px; }
.client-head { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 12px; }
.client-title { font-size: 17px; font-weight: 600; }
.client-platform { color: var(--text-muted); font-size: 13px; }
.client-features { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 14px; }
.client-features .tag {
  background: var(--bg-soft); padding: 3px 8px; border-radius: 4px; font-size: 12px;
}
.client-actions { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
.client-steps { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.client-steps summary {
  cursor: pointer; font-weight: 500; font-size: 14px; color: var(--primary);
  padding: 4px 0;
}
.client-steps[open] summary { margin-bottom: 12px; }
.client-steps ol { padding-left: 20px; color: var(--text-soft); font-size: 14px; line-height: 1.7; }
.client-steps li { margin-bottom: 4px; }

/* ---------- Tree (admin) ---------- */
.tree-node {
  padding: 8px 0 8px 24px;
  border-left: 2px solid var(--border);
  margin-left: 8px;
}
.tree-node.root { border-left: none; margin-left: 0; padding-left: 0; }
.tree-node.blocked { opacity: 0.55; }
.tree-node-head {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
}
.tree-node-name { font-weight: 500; }
.tree-node-meta { color: var(--text-muted); font-size: 12px; }

/* ---------- Table ---------- */
.table { width: 100%; border-collapse: collapse; font-size: 14px; }
.table th, .table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.table th { color: var(--text-muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: 0.4px; }
.table tr:hover { background: var(--bg-soft); }

/* ---------- Misc ---------- */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-small { font-size: 13px; }
.mt-8 { margin-top: 8px; } .mt-16 { margin-top: 16px; } .mt-24 { margin-top: 24px; }
.mb-8 { margin-bottom: 8px; } .mb-16 { margin-bottom: 16px; } .mb-24 { margin-bottom: 24px; }
.flex { display: flex; gap: 8px; align-items: center; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
.flex-wrap { flex-wrap: wrap; }
.gap-4 { gap: 4px; } .gap-8 { gap: 8px; } .gap-16 { gap: 16px; }

.theme-toggle {
  background: var(--bg-soft); border: 1px solid var(--border);
  width: 32px; height: 32px; border-radius: 50%; cursor: pointer;
  font-size: 16px; display: flex; align-items: center; justify-content: center;
  color: var(--text-soft);
}
.theme-toggle:hover { background: var(--border); }

/* ---------- Mobile ---------- */
@media (max-width: 640px) {
  .hero h1 { font-size: 26px; }
  .card { padding: 20px; }
  .topbar nav a { font-size: 13px; }
  .table { font-size: 13px; }
  .table th, .table td { padding: 8px 6px; }
}