/* ============================================
   Klimastation Dashboard - Apple Weather Style
   ============================================ */

   :root {
    /* Colors */
    --bg-primary: #000000;
    --bg-secondary: #1c1c1e;
    --bg-tertiary: #2c2c2e;
    --surface: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.75);
    --text-tertiary: rgba(255, 255, 255, 0.5);
    --border: rgba(255, 255, 255, 0.15);
    
    /* Vibrant Accent Colors */
    --accent-blue: #00a8ff;
    --accent-teal: #5ac8fa;
    --accent-green: #30d158;
    --accent-yellow: #ffd60a;
    --accent-orange: #ff9f0a;
    --accent-red: #ff453a;
    --accent-purple: #bf5af2;
    
    /* Weather Gradients */
    --gradient-blue: linear-gradient(135deg, #0a84ff 0%, #5ac8fa 100%);
    --gradient-green: linear-gradient(135deg, #32d74b 0%, #30d158 100%);
    --gradient-orange: linear-gradient(135deg, #ff9f0a 0%, #ff453a 100%);
    --gradient-purple: linear-gradient(135deg, #bf5af2 0%, #ff375f 100%);
    --gradient-teal: linear-gradient(135deg, #5ac8fa 0%, #32d74b 100%);
    
    /* Background Gradient */
    --gradient-bg: radial-gradient(ellipse at top, #1a2a3a 0%, #000000 50%);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Radius */
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    
    /* Shadows */
    --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 40px rgba(90, 200, 250, 0.2);
}

/* ============================================
   Reset & Base Styles
   ============================================ */

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
    background: var(--gradient-bg);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(10, 132, 255, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(191, 90, 242, 0.08) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(90, 200, 250, 0.06) 0%, transparent 50%);
    pointer-events: none;
}

/* ============================================
   Typography
   ============================================ */

h1, h2, h3 {
    font-weight: 600;
    letter-spacing: -0.03em;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
}

h2 {
    font-size: 1.5rem;
}

.mono {
    font-family: 'SF Mono', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
}

/* ============================================
   Header
   ============================================ */

.header {
    padding: var(--spacing-xl) var(--spacing-lg);
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(40px) saturate(180%);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.header-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-title h1 {
    font-size: 2rem;
    margin-bottom: 0.25rem;
    background: linear-gradient(135deg, #ffffff 0%, #5ac8fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.refresh-timer {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.875rem;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.refresh-timer svg {
    opacity: 0.9;
    transition: transform 0.3s ease;
}

.refresh-timer.refreshing {
    background: linear-gradient(135deg, rgba(255, 159, 10, 0.2), rgba(255, 69, 58, 0.2));
    border-color: rgba(255, 159, 10, 0.5);
    box-shadow: 0 4px 20px rgba(255, 159, 10, 0.3);
}

.refresh-timer.refreshing svg {
    animation: spin 1s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.connection-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.connection-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-green);
    box-shadow: 0 0 12px var(--accent-green);
}

.connection-badge.warning .connection-dot {
    background: var(--accent-orange);
    box-shadow: 0 0 12px var(--accent-orange);
}

.connection-badge.offline .connection-dot {
    background: var(--accent-red);
    box-shadow: 0 0 12px var(--accent-red);
}

/* ============================================
   Dashboard Layout
   ============================================ */

.dashboard {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-xl) var(--spacing-lg);
    display: grid;
    gap: var(--spacing-xl);
}

/* ============================================
   Metrics Grid
   ============================================ */

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.metric-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.metric-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    opacity: 1;
}

.metric-card:nth-child(1)::before {
    background: var(--gradient-blue);
}

.metric-card:nth-child(2)::before {
    background: var(--gradient-green);
}

.metric-card:nth-child(3)::before {
    background: var(--gradient-orange);
}

.metric-card:nth-child(4)::before {
    background: var(--gradient-purple);
}

.metric-card:nth-child(5)::before {
    background: var(--gradient-teal);
}

.metric-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.metric-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.3));
}

.metric-label {
    font-size: 1.05rem;
    color: var(--text-secondary);
    font-weight: 600;
    letter-spacing: 0.02em;
}

.metric-value-container {
    display: flex;
    align-items: baseline;
    gap: 0.375rem;
    margin-bottom: var(--spacing-md);
}

.metric-value {
    font-size: 4.5rem;
    font-weight: 200;
    letter-spacing: -0.04em;
    line-height: 1;
    background: linear-gradient(135deg, #ffffff 0%, rgba(255, 255, 255, 0.7) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 20px rgba(255, 255, 255, 0.1);
}

.metric-unit {
    font-size: 1.75rem;
    color: var(--text-tertiary);
    font-weight: 300;
}

.metric-trend {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.875rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.metric-trend.up {
    background: linear-gradient(135deg, rgba(48, 209, 88, 0.15), rgba(50, 215, 75, 0.1));
    border-color: rgba(48, 209, 88, 0.3);
    color: var(--accent-green);
}

.metric-trend.down {
    background: linear-gradient(135deg, rgba(255, 69, 58, 0.15), rgba(255, 69, 58, 0.1));
    border-color: rgba(255, 69, 58, 0.3);
    color: var(--accent-red);
}

.metric-trend .trend-icon {
    filter: drop-shadow(0 2px 4px currentColor);
}

.metric-footer {
    color: var(--text-tertiary);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ============================================
   Chart Card
   ============================================ */

.chart-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    position: relative;
    overflow: hidden;
}

.chart-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xl);
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.chart-title {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #5ac8fa 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.chart-subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.timeframe-selector {
    display: flex;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.08);
    padding: 0.5rem;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(20px);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.2);
}

.timeframe-btn {
    padding: 0.625rem 1.25rem;
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
    position: relative;
    min-width: 56px;
}

.timeframe-btn:hover {
    color: rgba(255, 255, 255, 0.85);
}

.timeframe-btn.active {
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.3) 0%, rgba(90, 200, 250, 0.3) 100%);
    color: #ffffff;
    box-shadow: 
        0 4px 16px rgba(10, 132, 255, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.timeframe-btn.active::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 10px;
    padding: 1.5px;
    background: linear-gradient(135deg, rgba(10, 132, 255, 0.6), rgba(90, 200, 250, 0.6));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.chart-container {
    width: 100%;
    height: 400px;
}

#chart {
    width: 100%;
    height: 100%;
}

/* ============================================
   Device Card
   ============================================ */

.device-card {
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
}

.device-header {
    margin-bottom: var(--spacing-xl);
}

.device-title {
    font-size: 1.75rem;
    font-weight: 700;
    background: linear-gradient(135deg, #ffffff 0%, #bf5af2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.device-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.device-icon {
    width: 100px;
    height: 100px;
    color: var(--accent-blue);
    opacity: 0.8;
    filter: drop-shadow(0 4px 16px rgba(10, 132, 255, 0.3));
}

.device-icon svg {
    width: 100%;
    height: 100%;
}

.device-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.375rem;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.info-item dt {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.info-item dd {
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 600;
}

.signal-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.signal-bars {
    display: flex;
    align-items: flex-end;
    gap: 3px;
    height: 20px;
}

.signal-bar {
    width: 5px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 3px;
}

.signal-bar:nth-child(1) { height: 25%; }
.signal-bar:nth-child(2) { height: 50%; }
.signal-bar:nth-child(3) { height: 75%; }
.signal-bar:nth-child(4) { height: 100%; }

.signal-bars.excellent .signal-bar {
    background: var(--accent-green);
    box-shadow: 0 0 8px var(--accent-green);
}

.signal-bars.good .signal-bar:nth-child(-n+3) {
    background: var(--accent-teal);
    box-shadow: 0 0 6px var(--accent-teal);
}

.signal-bars.fair .signal-bar:nth-child(-n+2) {
    background: var(--accent-orange);
    box-shadow: 0 0 6px var(--accent-orange);
}

.signal-bars.poor .signal-bar:nth-child(1) {
    background: var(--accent-red);
    box-shadow: 0 0 6px var(--accent-red);
}

/* ============================================
   Footer
   ============================================ */

.footer {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    color: var(--text-tertiary);
    font-size: 0.875rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: var(--spacing-2xl);
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(20px);
}

/* ============================================
   Loading Overlay
   ============================================ */

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(40px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    z-index: 1000;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-blue);
    border-right-color: var(--accent-teal);
    border-radius: 50%;
    animation: spin 1s cubic-bezier(0.4, 0, 0.2, 1) infinite;
    box-shadow: 0 0 30px rgba(10, 132, 255, 0.3);
}

/* ============================================
   Responsive Design
   ============================================ */

@media (max-width: 768px) {
    .header {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .header-title h1 {
        font-size: 1.75rem;
    }
    
    .dashboard {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .metrics-grid {
        grid-template-columns: 1fr;
    }
    
    .metric-value {
        font-size: 3.5rem;
    }
    
    .chart-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .timeframe-selector {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }
    
    .chart-container {
        height: 350px;
    }
    
    .device-content {
        grid-template-columns: 1fr;
    }
    
    .device-icon {
        width: 80px;
        height: 80px;
        margin: 0 auto;
    }
    
    .device-info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .header-title h1 {
        font-size: 1.5rem;
    }
    
    .metric-card {
        padding: var(--spacing-lg);
    }
    
    .metric-value {
        font-size: 3rem;
    }
    
    .chart-card {
        padding: var(--spacing-lg);
    }
    
    .timeframe-btn {
        padding: 0.5rem 0.875rem;
        font-size: 0.8125rem;
    }
}

/* ============================================
   Smooth Transitions
   ============================================ */

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}