*, *::before, *::after { box-sizing: border-box; }

/* ── Theme variables ──────────────────────────────────────────────────────── */
:root, html {
    /* Dark (default) */
    --c1: #e2e8f0;                       /* primary text   */
    --c2: #94a3b8;                       /* secondary text */
    --c3: #64748b;                       /* muted / labels */
    --c4: #475569;                       /* dim text       */
    --c5: #334155;                       /* very dim       */
    --bg-base:  #0f172a;                 /* page bg        */
    --bg-card:  #1e293b;                 /* card bg        */
    --bg-deep:  rgba(15,23,42,.6);       /* semi overlay   */
    --bg-semi:  rgba(15,23,42,.4);       /* lighter semi   */
    --ov-1:     rgba(15,23,42,.88);      /* map badge bg   */
    --ov-2:     rgba(15,23,42,.92);      /* info card bg   */
    --bs-1:     rgba(148,163,184,.08);   /* subtle bg      */
    --bs-2:     rgba(148,163,184,.06);   /* very subtle bg */
    --bd-1:     rgba(148,163,184,.1);    /* border         */
    --bd-2:     rgba(148,163,184,.07);   /* subtle border  */
}

html.light {
    --c1: #0f172a;
    --c2: #475569;
    --c3: #64748b;
    --c4: #94a3b8;
    --c5: #cbd5e1;
    --bg-base:  #f1f5f9;
    --bg-card:  #ffffff;
    --bg-deep:  rgba(255,255,255,.92);
    --bg-semi:  rgba(248,250,252,.88);
    --ov-1:     rgba(248,250,252,.96);
    --ov-2:     rgba(255,255,255,.97);
    --bs-1:     rgba(15,23,42,.05);
    --bs-2:     rgba(15,23,42,.04);
    --bd-1:     rgba(15,23,42,.1);
    --bd-2:     rgba(15,23,42,.06);
}

html, body {
    height: 100%;
    margin: 0;
    font-family: 'Inter', ui-sans-serif, system-ui, sans-serif;
    background-color: var(--bg-base);
    color: var(--c1);
    -webkit-font-smoothing: antialiased;
    transition: background-color .25s, color .25s;
}

.mono { font-family: 'JetBrains Mono', monospace; }

::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--bd-1); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--bd-1); opacity: .6; }

#blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: var(--bg-card);
    border-top: 1px solid rgba(239,68,68,.3);
    color: #fca5a5;
    padding: .75rem 1.5rem;
    font-size: .8rem;
    z-index: 1000;
}
#blazor-error-ui .dismiss { cursor: pointer; float: right; }

@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeSlideUp .35s ease both; }

@keyframes pulseDot {
    0%, 100% { box-shadow: 0 0 0 0 rgba(16,185,129,.5); }
    50%       { box-shadow: 0 0 0 6px rgba(16,185,129,0); }
}
.pulse-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: #10b981;
    animation: pulseDot 1.5s infinite;
    display: inline-block;
    flex-shrink: 0;
}

.badge {
    border-radius: 9999px; padding: .15rem .55rem;
    font-size: .6rem; font-weight: 800;
    letter-spacing: .05em; text-transform: uppercase; white-space: nowrap;
}
.badge-on   { background: rgba(16,185,129,.15);  color: #10b981; border: 1px solid rgba(16,185,129,.25); }
.badge-idle { background: rgba(245,158,11,.12);  color: #f59e0b; border: 1px solid rgba(245,158,11,.25); }
.badge-off  { background: rgba(239,68,68,.12);   color: #ef4444; border: 1px solid rgba(239,68,68,.25); }
.badge-ns   { background: var(--bs-1); color: var(--c4); border: 1px solid var(--bd-1); }

.card {
    background: var(--bg-card);
    border: 1px solid var(--bd-1);
    border-radius: 1.15rem;
    padding: 1.25rem 1.4rem;
    transition: background .25s, border-color .25s;
}

.fleet-table { width: 100%; border-collapse: collapse; font-size: .74rem; }
.fleet-table tbody tr:hover td { background: rgba(99,102,241,.05); }
.fleet-table thead th {
    position: sticky; top: 0; z-index: 2;
    background: var(--bg-card);
    border-bottom: 1px solid var(--bd-1);
    padding: .5rem .9rem;
    font-size: .62rem; font-weight: 800; color: var(--c3);
    letter-spacing: .08em; text-transform: uppercase; text-align: left;
    transition: background .25s;
}
.fleet-table tbody td {
    padding: .55rem .9rem;
    border-bottom: 1px solid var(--bs-2);
    transition: background .1s;
}

/* Theme-toggle button */
.theme-btn {
    background: var(--bg-card);
    border: 1px solid var(--bd-1);
    border-radius: .75rem;
    padding: .45rem .7rem;
    cursor: pointer;
    display: flex; align-items: center; gap: .35rem;
    color: var(--c3);
    font-size: .72rem; font-weight: 700;
    transition: all .2s;
}
.theme-btn:hover { border-color: var(--c3); color: var(--c1); }

.nav-tab {
    padding: .4rem .9rem; border-radius: .7rem;
    font-size: .7rem; font-weight: 800; letter-spacing: .04em; text-transform: uppercase;
    cursor: pointer; transition: all .15s; color: var(--c3);
    background: transparent; border: none;
    text-decoration: none; display: inline-flex; align-items: center; gap: .3rem;
}
.nav-tab:hover  { background: rgba(99,102,241,.1); color: #818cf8; }
.nav-tab.active { background: #6366f1; color: #fff; box-shadow: 0 4px 14px rgba(99,102,241,.3); }