:root {
  --bg: #f4f5f9; --surface: #ffffff; --surface-2: #eef0f6; --line: #dfe2ec;
  --fg: #1a1c22; --muted: #6b7280; --primary: #3f5ae0; --primary-fg: #fff;
  --ok: #1c8a3c; --warn: #b5820b; --danger: #c62828; --radius: 16px;
  --shadow: 0 1px 3px rgba(20,22,40,.06), 0 8px 24px rgba(20,22,40,.05);
  /* верхняя навигация (тёмная в обеих темах, как в 3x-ui) */
  --nav-bg: #1e2233; --nav-fg: #eef0f8; --nav-muted: #a6abc2;
  --nav-hover: rgba(255,255,255,.09); --nav-line: rgba(255,255,255,.08);
  --nav-line-strong: rgba(255,255,255,.22); --nav-badge: rgba(255,255,255,.16);
  --nav-active: #3f5ae0;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1116; --surface: #171a21; --surface-2: #1f232c; --line: #2b303b;
    --fg: #e7e9ee; --muted: #9aa0ac; --primary: #93a4ff; --primary-fg: #10143a;
    --ok: #5fd07a; --warn: #e6b23a; --danger: #ff6b6b;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 10px 30px rgba(0,0,0,.35);
    --nav-bg: #1b1f29;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  background: var(--bg); color: var(--fg);
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
button { font: inherit; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
.boot { display: grid; place-items: center; height: 100vh; color: var(--muted); }

/* --- layout: тёмный боковой сайдбар в духе 3x-ui --- */
:root { --sidebar-w: 226px; }
.shell { min-height: 100vh; }
.sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-w); z-index: 30;
  background: var(--nav-bg); color: var(--nav-fg);
  display: flex; flex-direction: column;
  padding: 18px 12px; border-right: 1px solid var(--nav-line);
  overflow-y: auto;
}
.sidebar .brand { padding: 4px 8px 20px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 16px; color: var(--nav-fg); flex: none; }
.brand .dot { width: 28px; height: 28px; border-radius: 8px; background: var(--primary); display: grid; place-items: center; color: var(--primary-fg); font-size: 14px; }
.nav { display: flex; flex-direction: column; gap: 2px; flex: 1; min-height: 0; }
.nav a {
  display: flex; align-items: center; gap: 8px;
  padding: 10px 12px; border-radius: 9px; white-space: nowrap;
  color: var(--nav-muted); font-weight: 500; font-size: 14px;
}
.nav a:hover { color: var(--nav-fg); background: var(--nav-hover); }
.nav a.on { color: #fff; background: var(--nav-active); }
.nav a .badge { margin-left: auto; background: var(--nav-badge); color: var(--nav-fg); border-radius: 999px; font-size: 11px; padding: 1px 7px; font-weight: 700; }
.nav a.on .badge { background: rgba(255,255,255,.25); color: #fff; }
.nav-logout {
  margin-top: 12px; text-align: left;
  border: 1px solid var(--nav-line-strong); background: transparent;
  color: var(--nav-fg); padding: 9px 14px; border-radius: 9px; font-weight: 600; font-size: 13px;
}
.nav-logout:hover { background: var(--nav-hover); border-color: var(--nav-fg); }
.topnav {
  display: none;
  position: sticky; top: 0; z-index: 30;
  align-items: center; gap: 12px;
  background: var(--nav-bg); color: var(--nav-fg);
  border-bottom: 1px solid var(--nav-line);
  padding: 0 14px; min-height: 54px;
}
.burger {
  display: grid; place-items: center;
  width: 38px; height: 38px; font-size: 16px; flex: none;
  border: 1px solid var(--nav-line-strong); border-radius: 9px;
  background: transparent; color: var(--nav-fg);
}
.main { width: 100%; max-width: 1180px; padding: 26px clamp(14px, 3vw, 28px) 64px; }
.topbar { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; flex-wrap: wrap; }
.topbar h1 { font-size: 22px; margin: 0; flex: 1; }

@media (min-width: 861px) {
  .main { margin-left: var(--sidebar-w); }
}
@media (max-width: 860px) {
  .topnav { display: flex; }
  .sidebar {
    width: 250px; transform: translateX(-100%);
    transition: transform .18s ease; box-shadow: var(--shadow);
  }
  .shell.open .sidebar { transform: translateX(0); }
  .shell.open::after {
    content: ""; position: fixed; inset: 0; z-index: 29;
    background: rgba(10,12,20,.45);
  }
  .sidebar .brand { display: none; }
  .main { padding-top: 20px; }
  .nav a { padding: 12px 10px; font-size: 15px; }
}

/* Горизонтальная лента вкладок (карточка ребёнка, админ-панель). */
.tabstrip { display: flex; gap: 6px; overflow-x: auto; margin: 0 0 18px; padding-bottom: 4px; -webkit-overflow-scrolling: touch; }
.tabstrip a { white-space: nowrap; padding: 7px 14px; border-radius: 999px; background: var(--surface); border: 1px solid var(--line); color: var(--fg); font-weight: 600; font-size: 13px; }
.tabstrip a.on { background: var(--primary); color: var(--primary-fg); border-color: transparent; }

/* --- primitives --- */
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: var(--shadow); }
.grid { display: grid; gap: 14px; }
.grid.cards { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spread { display: flex; align-items: center; gap: 12px; }
.spread > :first-child { flex: 1; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
h2.sec { font-size: 15px; letter-spacing: .01em; margin: 28px 0 12px; color: var(--primary); }
.btn { border: 1px solid var(--line); background: var(--surface); color: var(--fg); padding: 9px 14px; border-radius: 10px; font-weight: 600; }
.btn:hover { background: var(--surface-2); }
.btn.primary { background: var(--primary); color: var(--primary-fg); border-color: transparent; }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); }
.btn.sm { padding: 6px 10px; font-size: 13px; border-radius: 8px; }
.field { display: block; margin-bottom: 12px; }
.field > span { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.field input, .field select, .field textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line);
  border-radius: 10px; background: var(--bg);
}
.chip { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 999px; font-size: 12px; font-weight: 600; border: 1px solid var(--line); }
.chip.ok { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 40%, var(--line)); }
.chip.off { color: var(--muted); }
.chip.warn { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 40%, var(--line)); }
.chip.danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 40%, var(--line)); }
.avatar { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; color: #fff; font-weight: 700; flex: none; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.tablewrap { overflow-x: auto; }

/* --- auth --- */
.auth { min-height: 100vh; display: grid; place-items: center; padding: 24px; position: relative; }
.admin-corner {
  position: absolute; top: 16px; right: 20px;
  font-size: 13px; font-weight: 600; color: var(--muted);
  border: 1px solid var(--line); border-radius: 999px; padding: 6px 14px;
  background: var(--surface);
}
.admin-corner:hover { color: var(--fg); background: var(--surface-2); }
.auth .card { width: 100%; max-width: 420px; }
.auth .tabs { display: flex; gap: 4px; background: var(--surface-2); border-radius: 12px; padding: 4px; margin-bottom: 18px; }
.auth .tabs button { flex: 1; border: 0; background: transparent; padding: 9px; border-radius: 9px; font-weight: 600; color: var(--muted); }
.auth .tabs button.on { background: var(--surface); color: var(--fg); box-shadow: var(--shadow); }
.auth .tabs.seg { margin-top: -8px; margin-bottom: 14px; padding: 3px; }
.auth .tabs.seg button { padding: 7px; font-size: 13px; font-weight: 600; }
.auth .tabs.seg button.on { color: var(--primary); }
.auth .logo { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.auth .logo .dot { width: 44px; height: 44px; border-radius: 12px; background: var(--primary); color: var(--primary-fg); display: grid; place-items: center; font-size: 22px; }

/* --- reports chart --- */
.bars { display: grid; gap: 8px; }
.bar-row { display: grid; grid-template-columns: 96px 1fr 64px; align-items: center; gap: 10px; font-size: 13px; }
.bar-track { height: 12px; background: var(--surface-2); border-radius: 6px; overflow: hidden; }
.bar-fill { height: 100%; background: var(--primary); border-radius: 6px; }
.stat { text-align: left; }
.stat .n { font-size: 26px; font-weight: 700; }
.stat .l { color: var(--muted); font-size: 13px; }
.stat .d { color: var(--muted); font-size: 12px; margin-top: 2px; }

/* --- meter (проценты нагрузки) --- */
.meter { margin: 10px 0; }
.meter .top { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 5px; }
.meter .track { height: 10px; background: var(--surface-2); border-radius: 5px; overflow: hidden; }
.meter .fill { height: 100%; background: var(--primary); border-radius: 5px; }
.meter .fill.warn { background: var(--warn); }
.meter .fill.danger { background: var(--danger); }
.mini { display: grid; grid-template-columns: 130px 1fr 44px; gap: 8px; align-items: center; font-size: 13px; margin: 5px 0; }
.mini .track { height: 8px; background: var(--surface-2); border-radius: 4px; overflow: hidden; }
.mini .fill { height: 100%; background: var(--primary); }

/* --- toast / modal --- */
#toasts { position: fixed; bottom: 16px; left: 50%; transform: translateX(-50%); display: grid; gap: 8px; z-index: 60; }
.toast { background: var(--fg); color: var(--bg); padding: 10px 16px; border-radius: 10px; font-size: 14px; box-shadow: var(--shadow); }
.toast.err { background: var(--danger); color: #fff; }
.modal-bg { position: fixed; inset: 0; background: rgba(10,12,20,.5); display: grid; place-items: center; padding: 20px; z-index: 50; }
.modal { background: var(--surface); border-radius: var(--radius); padding: 22px; width: 100%; max-width: 460px; box-shadow: var(--shadow); }
.modal h3 { margin: 0 0 14px; }
.modal .actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; }
.loading { color: var(--muted); padding: 30px; text-align: center; }
.pill-days { display: flex; gap: 4px; flex-wrap: wrap; }
.pill-days label { border: 1px solid var(--line); border-radius: 999px; padding: 4px 10px; font-size: 12px; cursor: pointer; }
.pill-days input { display: none; }
.pill-days input:checked + span { }
.pill-days label:has(input:checked) { background: var(--primary); color: var(--primary-fg); border-color: transparent; }