:root {
    --ink: #10233a;
    --ink-soft: #4a5d73;
    --accent: #1b7a6e;
    --accent-dark: #145c53;
    --sand: #f6f1e8;
    --line: #d9e0e8;
    --sidebar: 260px;
    --danger: #b42318;
    --warn: #b54708;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: Inter, system-ui, sans-serif;
    background: #f4f7f8;
    color: var(--ink);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background:
        radial-gradient(circle at 10% 20%, #cfe8e3 0, transparent 40%),
        linear-gradient(160deg, #10233a 0%, #1b7a6e 100%);
}

.login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 16px 40px rgba(16, 35, 58, 0.25);
}

.login-card header {
    padding: 28px 28px 16px;
    background: var(--sand);
}

.login-card header p { margin: 6px 0 0; color: var(--ink-soft); }
.login-card form { padding: 24px 28px 28px; }

.app-shell { min-height: 100vh; }

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--sidebar);
    background: var(--ink);
    color: #fff;
    display: flex;
    flex-direction: column;
    padding: 20px 16px;
}

.brand { font-weight: 700; letter-spacing: 0.04em; margin-bottom: 24px; }
.brand-logo {
    display: block;
    max-height: 40px;
    max-width: 160px;
    margin-bottom: 8px;
    object-fit: contain;
}
.state-on { color: var(--accent); }
.state-off { color: var(--danger); }
.brand small { display: block; font-weight: 400; opacity: 0.7; margin-top: 4px; }

.nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #d7e3ea;
    text-decoration: none;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 4px;
}

.nav-link:hover,
.nav-link.active {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.sidebar-foot {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 0.85rem;
    color: #c5d2dc;
}

.main {
    margin-left: var(--sidebar);
    padding: 28px;
}

.page-title { margin: 0 0 8px; }
.muted { color: var(--ink-soft); }

.card-iotels {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 20px;
    margin-top: 16px;
}

.btn-accent {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.btn-accent:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: #fff;
}

.badge-role { text-transform: capitalize; }

.table td, .table th { vertical-align: middle; }

.device-list { display: flex; flex-direction: column; gap: 8px; }
.device-item {
    text-align: left;
    width: 100%;
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 10px;
    padding: 10px 12px;
}
.device-item.is-active { border-color: var(--accent); box-shadow: 0 0 0 2px rgba(27, 122, 110, 0.15); }
.status-dot { font-size: 0.75rem; text-transform: uppercase; font-weight: 700; }
.status-dot.online { color: var(--accent); }
.status-dot.offline { color: var(--danger); }
.status-dot.state-on { color: var(--accent); }
.status-dot.state-off { color: var(--danger); }
.status-dot.unknown { color: var(--ink-soft); font-size: 1.1rem; }
.stat-tile {
    background: var(--sand);
    border-radius: 10px;
    padding: 12px 14px;
}

.state-normal-choice {
    display: flex;
    flex-wrap: wrap;
    gap: 20px 32px;
    align-items: center;
    margin: 4px 0 8px;
}
.state-normal-choice .form-check {
    display: flex;
    align-items: center;
    gap: 10px;
    padding-left: 0;
    margin: 0;
    min-height: 2.25rem;
}
.state-normal-choice .form-check-input {
    float: none;
    margin: 0;
    width: 1.6rem;
    height: 1.6rem;
    flex-shrink: 0;
    appearance: none;
    -webkit-appearance: none;
    border: 3px solid #10233a;
    border-radius: 50%;
    background-color: #fff;
    background-image: none;
    box-shadow: none;
    cursor: pointer;
}
.state-normal-choice .form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(16, 35, 58, 0.2);
    border-color: #10233a;
}
.state-normal-choice .form-check-input:checked {
    background-color: #fff;
    border-width: 3px;
}
#normal_state_on {
    border-color: #1b7a6e;
}
#normal_state_on:checked {
    border-color: #1b7a6e;
    background-image: radial-gradient(circle, #1b7a6e 40%, #fff 43%);
}
#normal_state_off {
    border-color: #b42318;
}
#normal_state_off:checked {
    border-color: #b42318;
    background-image: radial-gradient(circle, #b42318 40%, #fff 43%);
}
.state-normal-choice .form-check-label {
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
}
.state-normal-on { color: var(--accent); }
.state-normal-off { color: var(--danger); }

.setting-locked .form-label,
.setting-locked .form-control:disabled {
    color: #8b95a1;
}
.setting-locked .form-control:disabled {
    background: #fff;
    border-color: var(--line);
    opacity: 1;
}

@media (max-width: 768px) {
    .sidebar { position: relative; width: 100%; }
    .main { margin-left: 0; padding: 16px; }
}