/* ==============================================================================
   Design System Dark Theme - Plataforma IoT
   Vanilla CSS Moderno com Variáveis Customizadas, Glassmorphism e Microinterações
   ============================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Paleta Base Dark */
    --bg-main: #0b0f19;
    --bg-surface: #111827;
    --bg-card: rgba(17, 24, 39, 0.75);
    --bg-input: #1e293b;
    --border-color: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.18);

    /* Cores de Ação e Status */
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.25);
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.2);
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #38bdf8;

    /* Tipografia */
    --text-main: #f3f4f6;
    --text-muted: #9ca3af;
    --text-subtle: #6b7280;

    /* Sombras e Raios */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow-card: 0 10px 25px -5px rgba(0, 0, 0, 0.5), 0 8px 10px -6px rgba(0, 0, 0, 0.4);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* Background com gradiente sutil */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 15%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
                radial-gradient(circle at 80% 85%, rgba(16, 185, 129, 0.05) 0%, transparent 45%);
    pointer-events: none;
    z-index: -1;
}

/* Navbar */
.navbar {
    background: rgba(17, 24, 39, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
    color: var(--text-main);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
}

.brand-icon {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--primary), #8b5cf6);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 15px var(--primary-glow);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.925rem;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.4rem 0.75rem;
    border-radius: var(--radius-sm);
}

.nav-link:hover, .nav-link.active {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.05);
}

.user-badge {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.875rem;
    color: var(--text-muted);
    padding: 0.35rem 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
}

/* Layout Principal */
.main-content {
    flex: 1;
    max-width: 1280px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Alertas Flash */
.flash-container {
    margin-bottom: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.alert {
    padding: 0.9rem 1.2rem;
    border-radius: var(--radius-md);
    font-size: 0.925rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid transparent;
    animation: fadeIn 0.3s ease;
}

.alert-success { background: rgba(16, 185, 129, 0.15); border-color: rgba(16, 185, 129, 0.3); color: #6ee7b7; }
.alert-warning { background: rgba(245, 158, 11, 0.15); border-color: rgba(245, 158, 11, 0.3); color: #fcd34d; }
.alert-danger  { background: rgba(239, 68, 68, 0.15); border-color: rgba(239, 68, 68, 0.3); color: #fca5a5; }
.alert-info    { background: rgba(56, 189, 248, 0.15); border-color: rgba(56, 189, 248, 0.3); color: #7dd3fc; }

/* Cards & Containers */
.card {
    background: var(--bg-card);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    padding: 1.5rem;
    transition: var(--transition);
}

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

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.card-title {
    font-size: 1.15rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

/* Grid de Dispositivos */
.devices-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.device-card {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.device-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-color);
    transition: var(--transition);
}

.device-card.online::after {
    background: var(--success);
    box-shadow: 0 0 12px var(--success);
}

.device-card.offline::after {
    background: var(--text-subtle);
}

/* Chips de Seleção Interativa de Variáveis */
.metric-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.85rem;
    font-size: 0.825rem;
    font-weight: 500;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-muted);
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.metric-chip:hover {
    border-color: var(--border-hover);
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
}

.metric-chip.active {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border-color: currentColor;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.3);
}

.metric-chip-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    transition: var(--transition);
}

.metric-chip:not(.active) .metric-chip-dot {
    opacity: 0.4;
}

.metric-chip:not(.active) {
    border-color: var(--border-color) !important;
    color: var(--text-subtle) !important;
}

/* Indicador de Status */
.status-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.25rem 0.65rem;
    border-radius: var(--radius-full);
}

.status-pill.online {
    background: var(--success-glow);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-pill.offline {
    background: rgba(107, 114, 128, 0.15);
    color: var(--text-subtle);
    border: 1px solid rgba(107, 114, 128, 0.25);
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: currentColor;
}

.status-pill.online .dot {
    animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.4); opacity: 0.6; }
}

/* Métricas do Sensor */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin: 1.25rem 0;
}

.metric-box {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 0.85rem;
    border-radius: var(--radius-md);
}

.metric-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-subtle);
    font-weight: 600;
    letter-spacing: 0.03em;
}

.metric-value {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-main);
    margin-top: 0.2rem;
    font-family: 'JetBrains Mono', monospace;
}

.metric-unit {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 400;
    margin-left: 0.2rem;
}

/* Botões */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.55rem 1.1rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    border: 1px solid transparent;
    transition: var(--transition);
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px var(--primary-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--border-color);
    color: var(--text-main);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--border-hover);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.15);
    border-color: rgba(239, 68, 68, 0.3);
    color: #fca5a5;
}

.btn-danger:hover {
    background: var(--danger);
    color: #fff;
}

.btn-sm {
    padding: 0.35rem 0.75rem;
    font-size: 0.8rem;
}

/* Formulários */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    margin-bottom: 0.4rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.65rem 0.9rem;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-size: 0.925rem;
    font-family: inherit;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

/* Caixa de Código e Token com Botão de Cópia */
.token-box {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 0.85rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: #38bdf8;
    gap: 0.75rem;
    word-break: break-all;
}

.token-box code {
    flex: 1;
}

.btn-copy {
    background: rgba(255, 255, 255, 0.08);
    border: none;
    color: var(--text-main);
    padding: 0.35rem 0.65rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.75rem;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-copy:hover {
    background: var(--primary);
}

/* Tabelas */
.table-container {
    width: 100%;
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    text-align: left;
}

.data-table th {
    background: rgba(255, 255, 255, 0.03);
    padding: 0.75rem 1rem;
    color: var(--text-muted);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.data-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-main);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: rgba(255, 255, 255, 0.02);
}

/* Box da IA (DeepSeek) */
.ai-box {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(139, 92, 246, 0.05));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    margin-top: 1.5rem;
}

.ai-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 0.75rem;
}

.ai-badge {
    background: var(--primary);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.2rem 0.5rem;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.ai-content {
    font-size: 0.9rem;
    line-height: 1.6;
    color: #e2e8f0;
    white-space: pre-wrap;
}

/* Gráfico Responsivo */
.chart-container {
    width: 100%;
    min-height: 320px;
    position: relative;
    margin: 1rem 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    justify-content: center;
}

.chart-svg {
    width: 100%;
    height: 340px;
    display: block;
    cursor: crosshair;
}

/* Tooltip Flutuante Interativo do Gráfico */
.chart-tooltip {
    position: absolute;
    background: rgba(15, 23, 42, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.7);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
    font-size: 0.8rem;
    color: var(--text-main);
    pointer-events: none;
    z-index: 100;
    transition: opacity 0.12s ease;
    opacity: 0;
    min-width: 170px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.chart-tooltip-time {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-subtle);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.35rem;
    margin-bottom: 0.45rem;
}

.chart-tooltip-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1.25rem;
    margin-bottom: 0.3rem;
}

.chart-tooltip-row:last-child {
    margin-bottom: 0;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    text-align: center;
    color: var(--text-subtle);
    font-size: 0.85rem;
    margin-top: auto;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 768px) {
    .nav-container { flex-direction: column; gap: 0.85rem; align-items: flex-start; }
    .nav-links { width: 100%; justify-content: space-between; }
    .metrics-row { grid-template-columns: 1fr; }
    .main-content { padding: 1.25rem 1rem; }
}