:root {
    --bg-gradient: linear-gradient(135deg, #1a1c2c 0%, #4a192c 100%);
    --card-bg: rgba(255, 255, 255, 0.05);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --accent-temp: #ff6b6b;
    --accent-humid: #4ecdc4;
    --accent-pressure: #ffe66d;
    --glass-blur: 16px;
    --font-main: 'Inter', sans-serif;
}

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

body {
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-main);
    min-height: 100vh;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 1200px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    margin-bottom: 2rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #fff, #aaa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--card-border);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.glass-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
}

.metric-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.metric-label {
    font-size: 1.1rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.metric-value {
    font-size: 4.5rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 0.5rem;
}

.metric-unit {
    font-size: 1.5rem;
    margin-left: 0.25rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.temp-value {
    color: var(--accent-temp);
}

.humid-value {
    color: var(--accent-humid);
}

.pressure-value {
    color: var(--accent-pressure);
}

.charts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 1024px) {
    .charts-grid {
        grid-template-columns: 1fr 1fr;
    }
}

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

.chart-title {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 0.5rem;
}

/* Header Controls */
.header-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    margin-top: 1rem;
}

.last-updated {
    font-size: 0.9rem;
    color: var(--text-secondary);
    letter-spacing: 0.5px;
}

.controls-row {
    display: flex;
    gap: 0.5rem;
    align-items: center;
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.unit-btn {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    font-family: inherit;
    font-weight: 600;
    transition: all 0.2s ease;
}

.unit-btn:hover {
    background: rgba(255, 255, 255, 0.25);
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.1);
}

.unit-btn:active {
    transform: scale(0.95);
}

.date-picker {
    padding: 0.5rem 1rem;
    border-radius: 20px;
    border: none;
    background: transparent;
    color: white;
    font-family: inherit;
    font-weight: 500;
    outline: none;
    cursor: pointer;
    transition: background 0.2s;
}

.date-picker:hover {
    background: rgba(255, 255, 255, 0.1);
}

.date-picker::-webkit-calendar-picker-indicator {
    filter: invert(1);
    opacity: 0.7;
    cursor: pointer;
    transition: opacity 0.2s;
}

.date-picker::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}