:root {
    --bg-color: #050505;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #ffffff;
    --text-muted: #888888;
    --accent-good: #00ff9d;
    --accent-moderate: #ffcc00;
    --accent-sensitive: #ff9900;
    /* Orange */
    --accent-unhealthy: #ff4d4d;
    --accent-temp: #ff6b6b;
    --accent-humi: #4d94ff;
    --glass-blur: 20px;
    --font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow-x: hidden;
    /* Background gradients */
    background-image:
        radial-gradient(circle at 10% 20%, rgba(60, 20, 160, 0.4) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(20, 180, 160, 0.2) 0%, transparent 40%);
}

.dashboard-container {
    width: 100%;
    max-width: 1000px;
    padding: 2rem;
    box-sizing: border-box;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 2rem;
}

.title-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 56px;
    width: auto;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.title-text {
    display: flex;
    flex-direction: column;
}

.title-group h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
}

.title-group p {
    margin: 0.2rem 0 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.header-stats {
    display: flex;
    gap: 1rem;
    margin-right: auto;
    margin-left: 2rem;
}

.user-stat {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 0.5rem 1.2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 80px;
    backdrop-filter: blur(5px);
}

.user-stat span:first-child {
    font-size: 0.65rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.2rem;
}

.user-stat span:last-child {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--accent-humi);
    /* Use accent color for visibility */
    line-height: 1.2;
}

.status-pill {
    background: rgba(0, 255, 157, 0.1);
    color: var(--accent-good);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    border: 1px solid rgba(0, 255, 157, 0.2);
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: currentColor;
    border-radius: 50%;
    box-shadow: 0 0 10px currentColor;
}

/* Main Grid */
.grid-container {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Cards */
.card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

/* PM2.5 Main Card */
.pm25-card {
    grid-column: 1 / -1;
    /* Span full width */
    display: flex;
    flex-direction: row;
    align-items: center;
    min-height: 200px;
    position: relative;
    overflow: hidden;
}

.pm25-content {
    flex: 1;
    z-index: 1;
}

.card-label {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    display: block;
}

.pm25-value-group {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
}

.pm25-value {
    font-size: 6rem;
    font-weight: 700;
    line-height: 1;
}

.pm25-unit {
    font-size: 1.5rem;
    color: var(--text-muted);
    font-weight: 400;
}

.pm25-standard {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Status Ring */
.status-ring-container {
    width: 150px;
    height: 150px;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.ring-circle {
    transform: rotate(-90deg);
    transform-origin: 50% 50%;
    transition: stroke-dashoffset 0.5s ease-in-out, stroke 0.5s;
}

.status-text-center {
    position: absolute;
    text-align: center;
}

.status-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    display: block;
}

.status-value {
    font-size: 1.2rem;
    font-weight: 700;
}

/* Sub Cards */
.sub-card {
    grid-column: span 1;
    min-height: 140px;
}

.icon {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    display: inline-block;
    padding: 0.5rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.05);
}

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

.humi-icon {
    color: var(--accent-humi);
}

.pm10-icon {
    color: #fff;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 600;
}

.metric-unit {
    font-size: 1.5rem;
    color: var(--text-muted);
}

/* System Stats Footer */
.stats-footer {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.5rem;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 1.5rem;
    margin-top: 1rem;
}

.stat-item {
    text-align: center;
    border-right: 1px solid var(--card-border);
}

.stat-item:last-child {
    border-right: none;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.3rem;
    display: block;
}

.stat-value {
    font-size: 1.1rem;
    font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }

    .pm25-card {
        flex-direction: column;
        text-align: center;
        padding-bottom: 2rem;
    }

    .pm25-value-group {
        justify-content: center;
    }

    .status-ring-container {
        margin-top: 1.5rem;
    }

    .stats-footer {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--card-border);
        padding-bottom: 1rem;
    }

    .stat-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
}