:root {
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-card: #1a2235;
    --bg-card-hover: #1f2a40;
    --bg-input: #0f1629;
    --border: #2a3550;
    --border-focus: #3b82f6;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.15);
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
    --transition: 0.2s ease;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* ═══════════════ Screens ═══════════════ */
.screen { display: none; }
.screen.active { display: block; }

/* ═══════════════ Login ═══════════════ */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(ellipse at top, #111d3a 0%, var(--bg-primary) 70%);
    padding: 2rem;
}

.login-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow), 0 0 80px rgba(59, 130, 246, 0.05);
}

.login-logo {
    text-align: center;
    margin-bottom: 2rem;
}

.logo-icon {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
    filter: drop-shadow(0 0 12px rgba(59, 130, 246, 0.4));
}

.login-logo h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 4px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-top: 0.25rem;
}

/* ═══════════════ Forms ═══════════════ */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.375rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="datetime-local"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

input:focus, textarea:focus, select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

textarea { resize: vertical; }

/* ═══════════════ Buttons ═══════════════ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #6366f1);
    color: white;
    box-shadow: 0 2px 12px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-secondary);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    background: var(--accent-glow);
}

.btn-google {
    background: var(--bg-input);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.btn-google:hover {
    border-color: var(--text-secondary);
    background: var(--bg-card-hover);
}

.btn-full { width: 100%; }
.btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; }

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* ═══════════════ Divider ═══════════════ */
.divider {
    display: flex;
    align-items: center;
    margin: 1.25rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
}

.divider::before, .divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
}

.divider span { padding: 0 1rem; }

/* ═══════════════ Navigation ═══════════════ */
.topnav {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-logo { font-size: 1.25rem; }

.nav-title {
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 2px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.nav-user {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.role-badge {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.2rem 0.6rem;
    border-radius: 20px;
    background: var(--accent-glow);
    color: var(--accent);
    border: 1px solid rgba(59, 130, 246, 0.2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ═══════════════ Main ═══════════════ */
.main-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* ═══════════════ Cards ═══════════════ */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: border-color var(--transition);
}

.card:hover { border-color: rgba(59, 130, 246, 0.2); }

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
}

.card-header h2 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ═══════════════ Device Status ═══════════════ */
.device-grid {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.status-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-dot.online {
    background: var(--success);
    box-shadow: 0 0 12px rgba(16, 185, 129, 0.5);
    animation: pulse-green 2s infinite;
}

.status-dot.offline {
    background: var(--danger);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.3);
}

@keyframes pulse-green {
    0%, 100% { box-shadow: 0 0 8px rgba(16, 185, 129, 0.4); }
    50% { box-shadow: 0 0 20px rgba(16, 185, 129, 0.6); }
}

.device-name {
    display: block;
    font-weight: 600;
    font-size: 0.95rem;
}

.status-text {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.device-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 0.75rem;
}

.meta-item {
    background: var(--bg-input);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    border: 1px solid transparent;
    transition: border-color var(--transition);
}

.meta-item:hover { border-color: var(--border); }

.meta-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.25rem;
}

.meta-value {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* ═══════════════ Commands / Shadow ═══════════════ */
.command-controls, .shadow-controls, .report-controls {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.report-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: 0.75rem;
    align-items: end;
}

@media (max-width: 640px) {
    .report-row {
        grid-template-columns: 1fr;
    }
}

.code-block {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.8rem;
    color: var(--text-secondary);
    overflow-x: auto;
    max-height: 240px;
    white-space: pre-wrap;
    word-break: break-all;
}

/* ═══════════════ Table ═══════════════ */
.table-wrapper { overflow-x: auto; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

th {
    text-align: left;
    padding: 0.6rem 0.75rem;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}

td {
    padding: 0.6rem 0.75rem;
    border-bottom: 1px solid rgba(42, 53, 80, 0.5);
    color: var(--text-secondary);
    max-width: 400px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

tr:hover td { color: var(--text-primary); }

.empty-state {
    text-align: center;
    color: var(--text-muted);
    padding: 2rem !important;
}

/* ═══════════════ Messages ═══════════════ */
.error-msg {
    color: var(--danger);
    font-size: 0.85rem;
    margin-top: 0.75rem;
    text-align: center;
}

.result-msg {
    font-size: 0.85rem;
    margin-top: 0.5rem;
    min-height: 1.2em;
}

.result-msg.success { color: var(--success); }
.result-msg.error { color: var(--danger); }

.select-sm {
    padding: 0.35rem 0.6rem;
    font-size: 0.8rem;
    width: auto;
}

/* ═══════════════ Responsive ═══════════════ */
@media (max-width: 640px) {
    .topnav {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    .nav-user { display: none; }
    .main-content { padding: 1rem; }
    .card { padding: 1rem; }
    .device-meta { grid-template-columns: 1fr 1fr; }
}

/* ═══════════════ Login Contact ═══════════════ */
.login-contact {
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 1.25rem;
}

.login-contact a {
    color: var(--accent);
    text-decoration: none;
}

.login-contact a:hover {
    text-decoration: underline;
}

/* ═══════════════ Admin Panel ═══════════════ */
.admin-add-user {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    margin-bottom: 1.25rem;
}

.admin-add-user h3 {
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-secondary);
}

.admin-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr auto;
    gap: 0.75rem;
    align-items: end;
}

@media (max-width: 640px) {
    .admin-form-row {
        grid-template-columns: 1fr;
    }
}

/* Badges */
.badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.badge-google {
    background: rgba(66, 133, 244, 0.15);
    color: #4285f4;
    border: 1px solid rgba(66, 133, 244, 0.2);
}

.badge-cognito {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.role-badge-sm {
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.15rem 0.5rem;
    border-radius: 20px;
    background: var(--accent-glow);
    color: var(--accent);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

/* Status indicators */
.status-active {
    color: var(--success);
    font-weight: 500;
    font-size: 0.8rem;
}

.status-disabled {
    color: var(--danger);
    font-weight: 500;
    font-size: 0.8rem;
}

/* Action buttons */
.action-cell {
    display: flex;
    gap: 0.25rem;
    white-space: nowrap;
}

.btn-xs {
    padding: 0.2rem 0.5rem;
    font-size: 0.75rem;
}

.btn-danger {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: var(--danger);
}

/* ═══════════════ Modal ═══════════════ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    width: 100%;
    max-width: 700px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 600;
}