/* =====================================================================
   Dark-Themed IoT Dashboard Stylesheet
   File: assets/css/style.css
   ===================================================================== */

:root {
    --bg-base: #0a0d14;
    --bg-surface: #111622;
    --bg-surface-elevated: #161c2d;
    --bg-card: rgba(18, 24, 38, 0.85);
    
    --border-subtle: #1e2638;
    --border-focus: #3b82f6;

    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    --accent-primary: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.25);

    --status-online: #10b981;
    --status-online-glow: rgba(16, 185, 129, 0.35);
    --status-offline: #f43f5e;
    --status-offline-glow: rgba(244, 63, 94, 0.35);

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', Consolas, Monaco, monospace;
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

.dashboard-wrapper {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px 20px 40px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* =====================================================================
   Header Section
   ===================================================================== */
.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-subtle);
    margin-bottom: 28px;
    flex-wrap: wrap;
    gap: 16px;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-badge {
    width: 46px;
    height: 46px;
    background: linear-gradient(135deg, #0284c7, #2563eb);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    box-shadow: 0 4px 14px var(--accent-glow);
}

.dashboard-header h1 {
    font-size: 1.35rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

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

/* Status Badges */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

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

.status-online {
    background: rgba(16, 185, 129, 0.12);
    color: var(--status-online);
    border-color: rgba(16, 185, 129, 0.3);
    box-shadow: 0 0 15px var(--status-online-glow);
}

.status-online .status-dot {
    background-color: var(--status-online);
    box-shadow: 0 0 8px var(--status-online);
    animation: pulseDot 2s infinite ease-in-out;
}

.status-offline {
    background: rgba(244, 63, 94, 0.12);
    color: var(--status-offline);
    border-color: rgba(244, 63, 94, 0.3);
    box-shadow: 0 0 15px var(--status-offline-glow);
}

.status-offline .status-dot {
    background-color: var(--status-offline);
    box-shadow: 0 0 8px var(--status-offline);
}

@keyframes pulseDot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

/* =====================================================================
   Metrics Grid
   ===================================================================== */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
    margin-bottom: 28px;
}

.metric-card {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 22px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

.metric-card:hover {
    border-color: #2a354c;
    transform: translateY(-2px);
}

.hero-metric {
    background: linear-gradient(145deg, rgba(17, 24, 39, 0.95), rgba(15, 23, 42, 0.8));
    border: 1px solid rgba(56, 189, 248, 0.25);
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.card-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-tag {
    font-size: 0.72rem;
    padding: 4px 8px;
    background: var(--bg-surface-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-family: var(--font-mono);
}

/* Big Digital Readout */
.readout-container {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin: 12px 0 18px;
}

.digital-value {
    font-family: var(--font-mono);
    font-size: 4rem;
    font-weight: 700;
    line-height: 1;
    color: #ffffff;
    letter-spacing: -0.04em;
    text-shadow: 0 0 20px rgba(56, 189, 248, 0.4);
    transition: color 0.3s ease;
}

.unit {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--accent-primary);
}

.sub-metrics {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin: 8px 0 16px;
}

.sub-metric-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    padding-bottom: 6px;
}

.sub-label {
    color: var(--text-secondary);
}

.sub-val {
    font-weight: 600;
    color: var(--text-primary);
}

.highlight {
    color: var(--accent-primary);
}

.mono-value {
    font-family: var(--font-mono);
}

.card-footer {
    border-top: 1px solid var(--border-subtle);
    padding-top: 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.status-indicator-note {
    font-size: 0.78rem;
    color: var(--text-muted);
}

/* =====================================================================
   Chart Section
   ===================================================================== */
.chart-section {
    margin-bottom: 28px;
}

.chart-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.chart-header h2 {
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
}

.chart-subtitle {
    font-size: 0.82rem;
    color: var(--text-muted);
}

.live-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-primary);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.pulse-ring {
    width: 8px;
    height: 8px;
    background-color: var(--accent-primary);
    border-radius: 50%;
    animation: pulseRing 1.5s infinite ease-out;
}

@keyframes pulseRing {
    0% { transform: scale(0.9); opacity: 1; }
    50% { transform: scale(1.4); opacity: 0.4; }
    100% { transform: scale(0.9); opacity: 1; }
}

.chart-canvas-wrapper {
    position: relative;
    height: 360px;
    width: 100%;
}

/* =====================================================================
   Footer
   ===================================================================== */
.dashboard-footer {
    margin-top: auto;
    padding-top: 24px;
    border-top: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 12px;
}

.api-status {
    font-family: var(--font-mono);
    color: var(--text-secondary);
}

/* =====================================================================
   Responsive Breakpoints
   ===================================================================== */
@media (max-width: 768px) {
    .dashboard-wrapper {
        padding: 16px 14px 24px;
    }

    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .digital-value {
        font-size: 3.2rem;
    }

    .chart-canvas-wrapper {
        height: 260px;
    }

    .dashboard-footer {
        flex-direction: column;
        align-items: flex-start;
    }
}