:root {
    --bg: #f4f6f9;
    --surface: #ffffff;
    --text: #1b2330;
    --muted: #5d6878;
    --border: #dfe4ea;
    --primary: #1f6feb;
    --primary-text: #ffffff;
    --ok: #1a7f37;
    --ok-bg: #dcf5e3;
    --warn: #9a6700;
    --warn-bg: #fff4d6;
    --danger: #c62828;
    --danger-bg: #fde7e7;
    --info-bg: #e3eefe;
    --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
    --radius: 12px;
    color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0f141b;
        --surface: #171e27;
        --text: #e6ebf1;
        --muted: #9aa6b4;
        --border: #2a3441;
        --primary: #4c8dff;
        --ok: #4ac26b;
        --ok-bg: #12301c;
        --warn: #e3b341;
        --warn-bg: #352a0b;
        --danger: #ff6b6b;
        --danger-bg: #3a1515;
        --info-bg: #142640;
        --shadow: none;
    }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
    margin: 0;
    font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
}
a { color: var(--primary); }
h1 { font-size: 1.6rem; margin: 0 0 .25rem; }
h2 { font-size: 1.1rem; margin: 0 0 .75rem; }
code { font-family: ui-monospace, Consolas, monospace; font-size: .92em; }
.muted { color: var(--muted); }
.small { font-size: .85rem; }
.right { text-align: right; }
.center { text-align: center; }
.nowrap { white-space: nowrap; }

/* Top bar */
.topbar {
    display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap;
    padding: .75rem 1.25rem; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: .5rem; font-weight: 600; color: var(--text); text-decoration: none; }
.brand svg { color: var(--primary); }
.nav { display: flex; gap: .25rem; flex-wrap: wrap; }
.nav a { padding: .4rem .75rem; border-radius: 8px; color: var(--muted); text-decoration: none; }
.nav a:hover { background: var(--bg); color: var(--text); }
.nav a.active { background: var(--info-bg); color: var(--primary); font-weight: 600; }
.logout { margin-left: auto; display: flex; align-items: center; gap: .75rem; }
.who { color: var(--muted); font-size: .9rem; }

.container { max-width: 1100px; margin: 0 auto; padding: 1.5rem 16px 3rem; }
.page-head { margin-bottom: 1.25rem; }
.page-head p { margin: .25rem 0 0; }

/* Cards */
.card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    box-shadow: var(--shadow); padding: 1.25rem; margin-bottom: 1.25rem;
}
.card.narrow { max-width: 620px; }
.card.highlight { border-color: var(--primary); }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 1rem; margin-bottom: .75rem; }
.card-head h2 { margin: 0; }
.grid-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 1.25rem; margin-bottom: 1.25rem; }
.grid-2 .card { margin-bottom: 0; }
.home-head { display: flex; justify-content: space-between; align-items: center; gap: .75rem; }
.home-head h2 { margin: 0; }

/* Forms */
.form { display: grid; gap: .9rem; }
.form label { display: grid; gap: .3rem; font-weight: 500; font-size: .92rem; }
.form-row { grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); align-items: end; }
.inline-form { display: flex; gap: .5rem; flex-wrap: wrap; }
.hint { font-weight: 400; color: var(--muted); font-size: .82rem; }
input, select {
    font: inherit; color: var(--text); background: var(--surface);
    border: 1px solid var(--border); border-radius: 8px; padding: .55rem .7rem; width: 100%; min-width: 0;
}
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: 1px; border-color: transparent; }
input[readonly] { background: var(--bg); color: var(--muted); }
.code-input { font-family: ui-monospace, Consolas, monospace; font-size: 1.3rem; letter-spacing: .25em; text-align: center; max-width: 220px; }
.inline-form .code-input { width: auto; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
    font: inherit; font-weight: 500; padding: .5rem .95rem; border-radius: 8px; cursor: pointer;
    border: 1px solid var(--border); background: var(--surface); color: var(--text); text-decoration: none;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: .6; cursor: wait; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-primary:hover { filter: brightness(1.08); border-color: var(--primary); }
.btn-ghost { background: transparent; }
.btn-danger-ghost { background: transparent; color: var(--danger); border-color: var(--danger); }
.btn-link { background: none; border: none; color: var(--muted); text-decoration: underline; }
.btn-small { padding: .25rem .6rem; font-size: .85rem; }
.btn-block { width: 100%; }

/* Alerts and badges */
.alert { padding: .7rem .9rem; border-radius: 8px; margin-bottom: 1rem; background: var(--info-bg); }
.alert ul { margin: 0; padding-left: 1.1rem; }
.alert-success { background: var(--ok-bg); color: var(--ok); }
.alert-error { background: var(--danger-bg); color: var(--danger); }
.alert-warning { background: var(--warn-bg); color: var(--warn); }
.badge { display: inline-block; padding: .1rem .55rem; border-radius: 999px; font-size: .78rem; font-weight: 600; white-space: nowrap; }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-muted { background: var(--bg); color: var(--muted); border: 1px solid var(--border); }

/* Tables */
.table-wrap { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; }
.table th, .table td { padding: .6rem .5rem; border-bottom: 1px solid var(--border); text-align: left; vertical-align: top; }
.table th { font-size: .8rem; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); font-weight: 600; }
.table tr:last-child td { border-bottom: none; }
.row-warn td { background: var(--warn-bg); }
.actions { display: flex; gap: .4rem; }
.actions select { width: auto; padding: .25rem .4rem; font-size: .85rem; }
.kv { display: inline-block; margin-right: .6rem; color: var(--muted); }

/* 2FA */
.steps { padding-left: 1.2rem; display: grid; gap: .8rem; }
.qr { margin: .75rem 0; padding: 12px; background: #fff; display: inline-block; border-radius: 8px; }
.qr img, .qr canvas { display: block; }
.secret { font-size: 1.05rem; letter-spacing: .08em; }
.codes { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .4rem; list-style: none; padding: 0; }
.codes li { background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: .4rem; text-align: center; }
.copy-row { display: flex; gap: .5rem; }

/* Auth pages */
.auth-wrap { min-height: 100vh; display: grid; place-items: center; padding: 1.5rem 16px; }
.auth-card {
    width: 100%; max-width: 400px; background: var(--surface); border: 1px solid var(--border);
    border-radius: 16px; box-shadow: var(--shadow); padding: 2rem 1.75rem;
}
.auth-card h1 { font-size: 1.35rem; margin-bottom: 1rem; }
.auth-logo { display: flex; flex-direction: column; align-items: center; gap: .4rem; color: var(--primary); margin-bottom: 1.5rem; }
.auth-logo div { color: var(--muted); font-size: .9rem; font-weight: 600; }
.auth-card details { margin-top: 1rem; }
.auth-card summary { cursor: pointer; color: var(--muted); }

@media (max-width: 640px) {
    .topbar { gap: .75rem; }
    .logout { margin-left: 0; width: 100%; justify-content: space-between; }
    .copy-row { flex-direction: column; }
}

/* ---- Phase 2: homes, status, charts ---- */
:root {
    --series-1: #2a78d6;
    --chart-grid: #e6e9ee;
    --status-good: #0ca30c;
    --status-warning: #fab219;
    --status-critical: #d03b3b;
}
@media (prefers-color-scheme: dark) {
    :root { --series-1: #3987e5; --chart-grid: #2a3441; }
}
h3.sub { font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--muted); margin: 1.1rem 0 .4rem; }
.home-card h2 a { color: var(--text); text-decoration: none; }
.home-card h2 a:hover { text-decoration: underline; }
.home-meta { margin: .35rem 0 .9rem; display: flex; flex-wrap: wrap; gap: .35rem; align-items: center; }

.status { display: inline-flex; align-items: center; gap: .35rem; padding: .25rem .7rem; border-radius: 999px; font-weight: 700; font-size: .85rem; border: 1px solid var(--border); white-space: nowrap; }
.status-armed { color: var(--ok); background: var(--ok-bg); border-color: transparent; }
.status-home { color: var(--primary); background: var(--info-bg); border-color: transparent; }
.status-off { color: var(--muted); background: var(--bg); }
.status-alarm { color: #fff; background: var(--status-critical); border-color: transparent; }
.status-unknown { color: var(--muted); }

.conn { display: inline-flex; align-items: center; gap: .35rem; }
.conn .dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; }
.conn-on .dot { background: var(--status-good); }
.conn-off { color: var(--danger); }
.conn-off .dot { background: var(--status-critical); }
.conn-none { color: var(--muted); }

.note { padding: .45rem .7rem; border-radius: 8px; margin-bottom: .4rem; font-size: .88rem; background: var(--bg); }
.note-warning { background: var(--warn-bg); color: var(--warn); }
.note-critical { background: var(--danger-bg); color: var(--danger); }

.kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: .5rem; margin: .5rem 0 .75rem; }
.kpi { background: var(--bg); border-radius: 10px; padding: .6rem .5rem; text-align: center; }
.kpi-value { font-size: 1.5rem; font-weight: 700; line-height: 1.1; font-variant-numeric: tabular-nums; }
.kpi-label { font-size: .75rem; color: var(--muted); }
.kpi-alert { background: var(--danger-bg); }
.kpi-alert .kpi-value { color: var(--danger); }
@media (max-width: 420px) { .kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

.chart { margin: .75rem 0 0; }
.chart-title { font-size: .85rem; color: var(--muted); margin-bottom: .25rem; }
.chart-svg { width: 100%; height: auto; display: block; overflow: visible; }
.chart-mark { fill: var(--series-1); }
.chart-hit { fill: transparent; }
.chart-bar:hover .chart-hit { fill: var(--chart-grid); }
.chart-grid { stroke: var(--chart-grid); stroke-width: 1; stroke-dasharray: 3 3; }
.chart-baseline { stroke: var(--border); stroke-width: 1; }
.chart-axis-label { fill: var(--muted); font-size: 11px; }
.chart-table summary { cursor: pointer; color: var(--muted); margin-top: .25rem; }

.events { list-style: none; padding: 0; margin: 0; }
.ev { display: flex; gap: .75rem; padding: .3rem 0; border-bottom: 1px solid var(--border); font-size: .9rem; }
.ev:last-child { border-bottom: none; }
.ev-time { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.ev-alarm .ev-text { color: var(--danger); font-weight: 600; }
.row-alarm td { background: var(--danger-bg); }
.row-muted td { opacity: .55; }
.badge-danger { background: var(--danger-bg); color: var(--danger); }

.filters { display: flex; flex-wrap: wrap; gap: .75rem; align-items: end; margin-bottom: 1rem; }
.filters label { display: grid; gap: .25rem; font-size: .85rem; font-weight: 500; }
.filters select { width: auto; }
.admin-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 1rem; }
.admin-actions .inline-form input { width: auto; }
.danger-zone { margin-top: 1rem; }
.danger-zone summary { cursor: pointer; color: var(--danger); }
.danger-zone form { margin-top: .5rem; }
pre.config { background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: .75rem; overflow-x: auto; font-size: .85rem; }