html {
    font-size: 14px;
    position: relative;
    min-height: 100%;
}

@media (min-width: 768px) {
    html {
        font-size: 16px;
    }
}

html[data-bs-theme="dark"] {
    --app-bg: #080e1a;
    --app-surface: rgba(255, 255, 255, 0.04);
    --app-border: rgba(255, 255, 255, 0.09);
    --app-border-2: rgba(255, 255, 255, 0.16);
    --app-text: rgba(255, 255, 255, 0.92);
    --app-muted: rgba(255, 255, 255, 0.55);

    /* Energy accent palette */
    --accent-green: #00e676;
    --accent-yellow: #ffb300;
    --accent-blue: #00b0ff;
    --accent-red: #ff1744;
    --accent-purple: #aa00ff;

    --bs-body-bg: var(--app-bg);
    --bs-body-color: var(--app-text);
    --bs-secondary-color: var(--app-muted);
    --bs-border-color: var(--app-border);
    --bs-link-color: var(--accent-blue);
    --bs-link-hover-color: #64d8ff;

    color-scheme: dark;
}

body {
    margin-bottom: 60px;
    background: none;
}

/* ── Animated dark-green energy background ─────────────────────── */
body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    background:
        radial-gradient(1100px 650px at 10% 8%, rgba(0, 230, 118, 0.12), transparent 55%),
        radial-gradient(900px 550px at 85% 12%, rgba(0, 176, 255, 0.12), transparent 55%),
        radial-gradient(700px 500px at 60% 88%, rgba(255, 179, 0, 0.08), transparent 60%),
        linear-gradient(180deg, #080e1a 0%, #04080f 100%);
    background-size: 140% 140%, 160% 160%, 150% 150%, 100% 100%;
    background-position: 10% 8%, 80% 12%, 60% 88%, 0 0;
    animation: bg-drift 22s ease-in-out infinite alternate;
}

@keyframes bg-drift {
    0% {
        background-position: 10% 8%, 80% 12%, 60% 88%, 0 0;
        filter: saturate(1.05);
    }

    100% {
        background-position: 16% 14%, 74% 20%, 66% 80%, 0 0;
        filter: saturate(1.18);
    }
}

@media (prefers-reduced-motion: reduce) {
    body::before {
        animation: none;
    }
}

/* ── Navbar ─────────────────────────────────────────────────────── */
.app-navbar {
    background:
        linear-gradient(135deg, rgba(0, 230, 118, 0.14), rgba(0, 176, 255, 0.08)),
        rgba(4, 8, 15, 0.72);
    border-bottom: 1px solid rgba(0, 230, 118, 0.15);
    backdrop-filter: blur(12px);
}

.app-navbar .navbar-brand {
    letter-spacing: 0.2px;
    font-weight: 600;
    color: var(--app-text) !important;
}

.app-navbar .nav-link {
    color: rgba(255, 255, 255, 0.75) !important;
    transition: color 150ms ease;
}

.app-navbar .nav-link:hover,
.app-navbar .nav-link:focus,
.app-navbar .nav-link.active {
    color: var(--accent-yellow) !important;
}

/* ── Cards ──────────────────────────────────────────────────────── */
.card {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.30);
    border-radius: 16px;
}

/* ── Device cards ───────────────────────────────────────────────── */
.device-card {
    transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.device-card:hover {
    transform: translateY(-3px);
}

/* Power-level border/glow */
.device-card.power-offline {
    border-color: rgba(255, 255, 255, 0.07);
}

.device-card.power-low {
    border-color: rgba(0, 230, 118, 0.30);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28), 0 0 20px rgba(0, 230, 118, 0.08);
}

.device-card.power-med {
    border-color: rgba(255, 179, 0, 0.45);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28), 0 0 24px rgba(255, 179, 0, 0.15);
}

.device-card.power-high {
    border-color: rgba(255, 23, 68, 0.50);
    box-shadow: 0 8px 28px rgba(0, 0, 0, 0.28), 0 0 28px rgba(255, 23, 68, 0.18);
}

.device-card .card-footer {
    background: rgba(255, 255, 255, 0.03);
    border-top: 1px solid var(--app-border);
    border-radius: 0 0 16px 16px;
}

/* ── Metric grid inside device card ─────────────────────────────── */
.metric-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(72px, 1fr));
    gap: 8px;
    margin-top: 8px;
}

.metric {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--app-border);
    border-radius: 10px;
    padding: 8px 6px;
    text-align: center;
}

.metric-value {
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.1;
    color: var(--accent-yellow);
    font-variant-numeric: tabular-nums;
}

.metric-value.power-value {
    color: var(--accent-yellow);
}

.metric-label {
    font-size: 0.68rem;
    color: var(--app-muted);
    margin-top: 2px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

/* ── Stat cards (device detail page) ────────────────────────────── */
.stat-card {
    border-radius: 14px;
}

.stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--app-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-top: 2px;
}

/* ── Status indicators ──────────────────────────────────────────── */
.badge-online {
    background: rgba(0, 230, 118, 0.18);
    color: var(--accent-green);
    border: 1px solid rgba(0, 230, 118, 0.30);
    border-radius: 20px;
    padding: 3px 10px;
    font-size: 0.72rem;
    font-weight: 600;
}

.badge-offline {
    background: rgba(255, 255, 255, 0.05);
    color: var(--app-muted);
    border: 1px solid var(--app-border);
    border-radius: 20px;
    padding: 3px 10px;
    font-size: 0.72rem;
    font-weight: 600;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
}

.status-online {
    background: var(--accent-green);
    box-shadow: 0 0 6px rgba(0, 230, 118, 0.6);
}

.status-disabled {
    background: rgba(255, 255, 255, 0.18);
}

/* ── Offline state inside card ──────────────────────────────────── */
.offline-state i {
    color: var(--app-muted);
}

/* ── Forms ──────────────────────────────────────────────────────── */
html[data-bs-theme="dark"] .form-control,
html[data-bs-theme="dark"] .form-select,
html[data-bs-theme="dark"] textarea.form-control,
html[data-bs-theme="dark"] input.form-control,
html[data-bs-theme="dark"] select.form-select {
    background-color: rgba(255, 255, 255, 0.04) !important;
    border-color: var(--app-border) !important;
    color: var(--app-text) !important;
}

html[data-bs-theme="dark"] input[type="number"],
html[data-bs-theme="dark"] input[type="text"],
html[data-bs-theme="dark"] input[type="password"],
html[data-bs-theme="dark"] select {
    color-scheme: dark;
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.35);
}

.form-control:focus,
.form-select:focus {
    box-shadow: 0 0 0 0.15rem rgba(4, 8, 15, 0.9), 0 0 0 0.35rem rgba(0, 230, 118, 0.28) !important;
    border-color: rgba(0, 230, 118, 0.40) !important;
}

/* ── Buttons ────────────────────────────────────────────────────── */
.btn-primary {
    border: 0;
    background-image: linear-gradient(135deg, #00c853 0%, #00b0ff 100%);
    box-shadow: 0 8px 22px rgba(0, 200, 83, 0.22);
}

.btn-primary:hover {
    background-image: linear-gradient(135deg, #00e676 0%, #40c4ff 100%);
    box-shadow: 0 10px 28px rgba(0, 230, 118, 0.28);
}

.btn-outline-secondary {
    border-color: var(--app-border-2);
    color: var(--app-muted);
}

.btn-outline-secondary:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--app-text);
    border-color: var(--app-border-2);
}

/* ── Dropdown (admin menu) ──────────────────────────────────────── */
.dropdown-menu-dark {
    background: rgba(8, 14, 26, 0.96) !important;
    border: 1px solid var(--app-border-2) !important;
    backdrop-filter: blur(10px);
}

.dropdown-menu-dark .dropdown-item:hover {
    background: rgba(0, 230, 118, 0.10) !important;
}

/* ── Text helpers ───────────────────────────────────────────────── */
.text-muted {
    color: var(--app-muted) !important;
}

/* ── List group ─────────────────────────────────────────────────── */
.list-group {
    --bs-list-group-bg: var(--app-surface);
    --bs-list-group-color: var(--app-text);
    --bs-list-group-border-color: var(--app-border);
    --bs-list-group-action-hover-bg: rgba(255, 255, 255, 0.05);
    border-radius: 14px;
    overflow: hidden;
}

.list-group-item {
    border-color: var(--app-border);
    background-color: var(--app-surface);
    color: var(--app-text);
}