:root {
    --bg: #0f1419;
    --bg-2: #171d26;
    --bg-3: #1f2733;
    --border: #2a3441;
    --text: #e6edf3;
    --text-dim: #8b98a9;
    --accent: #3b82f6;
    --accent-2: #2563eb;
    --green: #22c55e;
    --amber: #f59e0b;
    --red: #ef4444;
    --purple: #a855f7;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    font-size: 14px;
}

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

h1 { font-size: 1.5rem; margin: 0 0 .25rem; }
h1:focus { outline: none; }
h2 { font-size: 1.15rem; margin: 0 0 .5rem; }
h3 { font-size: 1rem; margin: 0 0 .5rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: .04em; font-weight: 600; }

/* ---- Layout ---- */
.app {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: 230px;
    background: var(--bg-2);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 1rem .75rem;
    position: sticky;
    top: 0;
    height: 100vh;
}
.brand {
    font-weight: 700;
    font-size: 1.05rem;
    padding: .25rem .5rem 1rem;
    display: flex;
    align-items: center;
    gap: .5rem;
}
.brand .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
.nav-link {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .55rem .65rem;
    border-radius: 8px;
    color: var(--text-dim);
    font-weight: 500;
    margin-bottom: .15rem;
    cursor: pointer;
}
.nav-link:hover { background: var(--bg-3); color: var(--text); text-decoration: none; }
.nav-link.active { background: var(--accent-2); color: #fff; }
.nav-badge { margin-left: auto; background: var(--bg-3); color: var(--text); border-radius: 10px; padding: 0 .5rem; font-size: .75rem; }
.nav-link.active .nav-badge { background: rgba(255,255,255,.2); }
.user-chip { display: flex; align-items: center; justify-content: space-between; gap: .5rem; padding: .55rem .65rem; margin-top: .3rem; background: var(--bg-3); border: 1px solid var(--border); border-radius: 8px; }
.user-name { font-weight: 600; font-size: .85rem; }

/* ---- Timeline (actividad) ---- */
.timeline { border-left: 2px solid var(--border); margin: .5rem 0 0 .35rem; padding-left: .25rem; }
.tl-row { display: flex; gap: .6rem; align-items: baseline; padding: .2rem .4rem; border-radius: 6px; font-size: .85rem; }
.tl-row:hover { background: var(--bg-3); }
.tl-time { color: var(--text-dim); font-family: Consolas, monospace; font-size: .75rem; min-width: 62px; }
.tl-ico { min-width: 18px; text-align: center; }
.tl-detail { word-break: break-all; }

.content { flex: 1; padding: 1.5rem 2rem; max-width: 1500px; }
.topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.25rem; }
.muted { color: var(--text-dim); }

/* ---- Cards ---- */
.grid { display: grid; gap: 1rem; }
.grid.cards { grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); }
.card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1rem 1.1rem;
}
.card.clickable { cursor: pointer; transition: border-color .15s, transform .1s; }
.card.clickable:hover { border-color: var(--accent); transform: translateY(-2px); }
.card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: .75rem; }
.card-title { font-weight: 600; font-size: 1.05rem; display: flex; align-items: center; gap: .5rem; }

/* ---- Status pills & badges ---- */
.pill { display: inline-flex; align-items: center; gap: .35rem; padding: .15rem .55rem; border-radius: 999px; font-size: .75rem; font-weight: 600; }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; }
.pill.online { background: rgba(34,197,94,.15); color: var(--green); }
.pill.online .dot { background: var(--green); }
.pill.offline { background: rgba(139,152,169,.15); color: var(--text-dim); }
.pill.offline .dot { background: var(--text-dim); }
.badge { display: inline-block; padding: .1rem .45rem; border-radius: 6px; font-size: .72rem; font-weight: 600; background: var(--bg-3); color: var(--text-dim); }
.badge.green { background: rgba(34,197,94,.15); color: var(--green); }
.badge.amber { background: rgba(245,158,11,.15); color: var(--amber); }
.badge.red { background: rgba(239,68,68,.15); color: var(--red); }
.badge.blue { background: rgba(59,130,246,.15); color: var(--accent); }
.badge.purple { background: rgba(168,85,247,.15); color: var(--purple); }

/* ---- Metric bars ---- */
.metric { margin-bottom: .6rem; }
.metric-label { display: flex; justify-content: space-between; font-size: .8rem; margin-bottom: .2rem; }
.bar { height: 7px; background: var(--bg-3); border-radius: 4px; overflow: hidden; }
.bar > span { display: block; height: 100%; border-radius: 4px; background: var(--accent); transition: width .4s; }
.bar > span.warn { background: var(--amber); }
.bar > span.crit { background: var(--red); }

.stat-row { display: flex; gap: 1.5rem; flex-wrap: wrap; }
.stat { text-align: center; }
.stat .n { font-size: 1.6rem; font-weight: 700; }
.stat .l { font-size: .75rem; color: var(--text-dim); text-transform: uppercase; }

/* ---- Tables ---- */
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-dim); padding: .5rem .6rem; border-bottom: 1px solid var(--border); }
td { padding: .5rem .6rem; border-bottom: 1px solid var(--border); }
tr:hover td { background: var(--bg-3); }

/* ---- Buttons ---- */
.btn { display: inline-flex; align-items: center; gap: .35rem; border: 1px solid var(--border); background: var(--bg-3); color: var(--text); padding: .35rem .7rem; border-radius: 7px; font-size: .82rem; font-weight: 500; cursor: pointer; }
.btn:hover { border-color: var(--accent); }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn.primary { background: var(--accent-2); border-color: var(--accent-2); color: #fff; }
.btn.danger { background: rgba(239,68,68,.12); border-color: rgba(239,68,68,.4); color: #ff9b9b; }
.btn.danger:hover { background: var(--red); color: #fff; }
.btn.sm { padding: .2rem .5rem; font-size: .75rem; }
.btn-row { display: flex; gap: .4rem; flex-wrap: wrap; }

.tabs { display: flex; gap: .25rem; border-bottom: 1px solid var(--border); margin-bottom: 1rem; }
.tab { padding: .55rem .9rem; cursor: pointer; color: var(--text-dim); border-bottom: 2px solid transparent; font-weight: 500; }
.tab:hover { color: var(--text); }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

.toolbar { display: flex; gap: .6rem; align-items: center; margin-bottom: 1rem; flex-wrap: wrap; }
input[type=text], input[type=number], select, textarea {
    background: var(--bg-3); border: 1px solid var(--border); color: var(--text);
    padding: .4rem .6rem; border-radius: 7px; font-size: .85rem; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }

.toast-host { position: fixed; bottom: 1.25rem; right: 1.25rem; display: flex; flex-direction: column; gap: .5rem; z-index: 1000; }
.toast { background: var(--bg-3); border: 1px solid var(--border); border-left: 4px solid var(--accent); padding: .7rem 1rem; border-radius: 8px; min-width: 260px; box-shadow: 0 8px 24px rgba(0,0,0,.4); }
.toast.ok { border-left-color: var(--green); }
.toast.err { border-left-color: var(--red); }

.empty { text-align: center; padding: 3rem; color: var(--text-dim); }

.dialog-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: flex; align-items: center; justify-content: center; z-index: 1500; }
.dialog { background: var(--bg-2); border: 1px solid var(--border); border-radius: 12px; padding: 1.5rem; width: 420px; max-width: 90vw; }

/* ---- Login ---- */
.login-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 1rem; }
.login-card { background: var(--bg-2); border: 1px solid var(--border); border-radius: 14px; padding: 2rem; width: 360px; max-width: 92vw; box-shadow: 0 12px 40px rgba(0,0,0,.45); }
.login-brand { font-weight: 700; font-size: 1.3rem; display: flex; align-items: center; gap: .5rem; }
.login-brand .dot { width: 11px; height: 11px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px var(--green); }
.login-label { display: block; font-size: .78rem; color: var(--text-dim); margin: .9rem 0 .25rem; text-transform: uppercase; letter-spacing: .03em; }
.login-input { width: 100%; background: var(--bg-3); border: 1px solid var(--border); color: var(--text); padding: .55rem .7rem; border-radius: 8px; font-size: .95rem; }
.login-input:focus { outline: none; border-color: var(--accent); }
.login-error { background: rgba(239,68,68,.12); border: 1px solid rgba(239,68,68,.4); color: #ff9b9b; padding: .55rem .75rem; border-radius: 8px; margin: 1rem 0 .25rem; font-size: .85rem; }

#blazor-error-ui { position: fixed; bottom: 0; left: 0; right: 0; background: var(--red); color: #fff; padding: .6rem 1rem; display: none; z-index: 2000; }
#blazor-error-ui .reload, #blazor-error-ui .dismiss { color: #fff; cursor: pointer; margin-left: 1rem; }
.blazor-error-boundary { background: var(--red); padding: 1rem; color: #fff; border-radius: 8px; }