:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --text: #1c2430;
  --muted: #6b7686;
  --border: #e3e7ec;
  --accent: #2f6fed;
  --accent-soft: #e8efff;
  --ok: #1f9d55;
  --ok-soft: #e3f6eb;
  --bad: #d64545;
  --bad-soft: #fbe9e9;
  --sidebar: #141b26;
  --sidebar-text: #c6cdd8;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  color: var(--text);
}

* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); }
a { color: var(--accent); text-decoration: none; }
h1 { font-size: 1.5rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 0 0 .5rem; }
code, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .85em; }
.muted { color: var(--muted); }
.small { font-size: .85em; }

/* Shell */
.shell { display: flex; min-height: 100vh; }
.sidebar {
  width: 220px; flex-shrink: 0; background: var(--sidebar); color: var(--sidebar-text);
  display: flex; flex-direction: column; padding: 1.25rem 0;
}
.sidebar .brand { color: #fff; font-weight: 700; font-size: 1.2rem; padding: 0 1.25rem 1.25rem; }
.sidebar nav { display: flex; flex-direction: column; flex: 1; }
.sidebar nav a { color: var(--sidebar-text); padding: .6rem 1.25rem; border-left: 3px solid transparent; }
.sidebar nav a:hover { background: rgba(255, 255, 255, .05); color: #fff; }
.sidebar nav a.active { color: #fff; border-left-color: var(--accent); background: rgba(255, 255, 255, .07); }
.sidebar-footer { padding: 1rem 1.25rem 0; border-top: 1px solid rgba(255, 255, 255, .1); display: grid; gap: .4rem; }
.sidebar-footer a, .sidebar-footer .link { color: var(--sidebar-text); }
.sidebar-footer .user { color: #fff; overflow: hidden; text-overflow: ellipsis; }
.content { flex: 1; padding: 2rem; min-width: 0; }

@media (max-width: 760px) {
  .shell { flex-direction: column; }
  .sidebar { width: auto; padding: .75rem 0; }
  .sidebar nav { flex-direction: row; flex-wrap: wrap; }
  .sidebar nav a { border-left: 0; border-bottom: 3px solid transparent; }
  .sidebar nav a.active { border-bottom-color: var(--accent); }
  .content { padding: 1rem; }
}

/* Components */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.card, .panel { background: var(--surface); border: 1px solid var(--border); border-radius: 8px; padding: 1rem 1.25rem; }
.card-label { color: var(--muted); font-size: .85rem; }
.card-value { font-size: 1.8rem; font-weight: 650; margin-top: .25rem; font-variant-numeric: tabular-nums; }

.table-wrap { overflow-x: auto; background: var(--surface); border: 1px solid var(--border); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .55rem .9rem; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { font-weight: 600; color: var(--muted); font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--bg); }

.badge { display: inline-block; padding: .1rem .5rem; border-radius: 999px; font-size: .78rem; background: var(--border); color: var(--text); }
.badge.ok { background: var(--ok-soft); color: var(--ok); }
.badge.off { background: var(--bad-soft); color: var(--bad); }

.messages { list-style: none; padding: 0; margin: 0 0 1rem; }
.messages li { padding: .6rem .9rem; border-radius: 6px; background: var(--accent-soft); margin-bottom: .5rem; }
.messages li.error { background: var(--bad-soft); color: var(--bad); }

button.link { background: none; border: 0; padding: 0; font: inherit; cursor: pointer; text-align: left; }
.btn {
  display: block; width: 100%; padding: .65rem 1rem; border-radius: 6px; border: 1px solid var(--accent);
  background: var(--accent); color: #fff; font: inherit; font-weight: 600; cursor: pointer;
}
.btn:hover { filter: brightness(1.05); }
.btn-google { background: var(--surface); color: var(--text); border-color: var(--border); }

/* Auth pages */
body.auth { display: grid; place-items: center; min-height: 100vh; padding: 1rem; }
.auth-card { width: 100%; max-width: 380px; background: var(--surface); border: 1px solid var(--border); border-radius: 10px; padding: 2rem; }
.auth-card .brand { font-weight: 700; font-size: 1.4rem; margin-bottom: 1.5rem; text-align: center; }
.form { display: grid; gap: .5rem; }
.form label { font-weight: 500; margin-top: .4rem; }
.form input[type=email], .form input[type=password], .form input[type=text] {
  padding: .55rem .7rem; border: 1px solid var(--border); border-radius: 6px; font: inherit; width: 100%;
}
.form .checkbox { font-weight: 400; display: flex; gap: .4rem; align-items: center; }
.form .btn { margin-top: .75rem; }
.error { color: var(--bad); background: var(--bad-soft); padding: .5rem .7rem; border-radius: 6px; }
.divider { display: flex; align-items: center; gap: .75rem; color: var(--muted); font-size: .85rem; margin: 1.25rem 0; }
.divider::before, .divider::after { content: ""; flex: 1; border-top: 1px solid var(--border); }

/* New devices */
.toolbar { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem; margin-bottom: 1rem; }
.input-days { width: 4.5rem; padding: .35rem .5rem; border: 1px solid var(--border); border-radius: 6px; font: inherit; }
.btn-small { display: inline-block; width: auto; padding: .35rem .7rem; font-size: .85rem; }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
td.actions { display: flex; gap: .4rem; }
.thumb { width: 120px; height: 68px; border-radius: 4px; overflow: hidden; background: var(--bg); display: grid; place-items: center; }
.thumb img { width: 120px; height: 68px; object-fit: cover; display: block; }
.thumb .thumb-empty { display: none; color: var(--muted); font-size: .75rem; }
.thumb:not(:has(img)) .thumb-empty, .thumb.missing .thumb-empty { display: block; }
.thumb.missing a { display: none; }
tr.row-done td { background: var(--ok-soft); color: var(--ok); }

/* Last seen */
.section-gap { margin-top: 2rem; }
.section-header { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: .5rem; margin-bottom: .5rem; }
.section-header h2 { margin: 0; }
tr.row-problem td { background: var(--bad-soft); }
tr.row-problem td:first-child { box-shadow: inset 3px 0 0 var(--bad); }
a.card-link { color: inherit; }
a.card-link:hover { border-color: var(--accent); }

/* VCW */
.input-date { padding: .35rem .5rem; border: 1px solid var(--border); border-radius: 6px; font: inherit; }
td.center { text-align: center; }
td.intervals div { white-space: nowrap; }
.plain-list { margin: .5rem 0 0; padding-left: 1.2rem; }