:root {
    --bg-primary: #0a0f1a;
    --bg-secondary: #121826;
    --card-bg: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.08);
    --text-main: #ffffff;
    --text-dim: #94a3b8;
    --accent: #00d2ff;
    --glass-blur: 20px;
    
    --color-temp: #ff3e3e;
    --color-hum: #00d2ff;
    --color-co2: #32d74b;
    --color-lux: #ffd60a;
    --color-press: #94a3b8;
}

body { 
    font-family: 'Plus Jakarta Sans', sans-serif; 
    background-color: var(--bg-primary);
    background-image: 
        radial-gradient(at 0% 0%, rgba(0, 210, 255, 0.07) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(147, 51, 234, 0.07) 0px, transparent 50%);
    background-attachment: fixed;
    color: var(--text-main);
    margin: 0;
    padding: 40px 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container { 
    max-width: 1400px; 
    margin: 0 auto; 
    flex: 1;
    width: 100%;
}

/**
 * Layout & Typography
 */

header { 
    text-align: center; 
    margin-bottom: 60px; 
    animation: fadeInDown 0.8s ease-out forwards;
}

.branding {
    display: inline-flex; 
    align-items: center; 
    gap: 12px;
    background: rgba(255, 255, 255, 0.04); 
    padding: 8px 24px;
    border-radius: 100px; 
    border: 1px solid var(--border); 
    margin-bottom: 20px;
    box-shadow: 0 4px 20px rgba(0, 255, 136, 0.05);
    transition: all 0.3s ease;
}

.branding:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 255, 136, 0.3);
}

.pulse {
    width: 10px; height: 10px; 
    background: #00ff88;
    border-radius: 50%; 
    box-shadow: 0 0 15px #00ff88;
    animation: pulse-ring 2s infinite;
}

.branding-text {
    font-size: 0.75rem; 
    letter-spacing: 3px; 
    font-weight: 700; 
    color: #00ff88;
}

h1 { 
    font-size: 3rem; 
    font-weight: 700; 
    margin: 0; 
    letter-spacing: -1px;
    background: linear-gradient(135deg, #ffffff 30%, #64748b 100%);
    -webkit-background-clip: text; 
    -webkit-text-fill-color: transparent;
}

h1 span {
    font-weight: 200;
}

.chart-grid { 
    display: flex; 
    flex-wrap: wrap; 
    justify-content: center; 
    gap: 25px;
}

/**
 * Component: Sensor Card
 */

.sensor-card { 
    flex: 1 1 400px; 
    max-width: 450px;
    background: var(--card-bg); 
    backdrop-filter: blur(var(--glass-blur)); 
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--border); 
    border-radius: 24px; 
    padding: 30px;
    transition: all 0.4s cubic-bezier(0.23, 1, 0.32, 1); 
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0;
    transform: translateY(20px);
}

.sensor-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.sensor-card:hover {
    transform: translateY(-6px); 
    border-color: rgba(255, 255, 255, 0.15); 
    background: rgba(255, 255, 255, 0.05);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.sensor-card:hover::before {
    opacity: 1;
}

.card-header {
    display: flex; 
    justify-content: space-between; 
    align-items: flex-start;
}

.label-group h3 {
    margin: 0; 
    font-size: 0.85rem; 
    text-transform: uppercase; 
    letter-spacing: 2px; 
    color: var(--text-dim);
    font-weight: 600;
}

.time-select {
    background: rgba(0, 0, 0, 0.4); 
    color: var(--text-dim);
    border: 1px solid var(--border); 
    border-radius: 8px;
    padding: 6px 10px; 
    font-size: 0.75rem; 
    font-weight: 500;
    font-family: 'Plus Jakarta Sans', sans-serif;
    cursor: pointer; 
    outline: none; 
    transition: all 0.2s ease;
}

.time-select:hover, .time-select:focus { 
    border-color: var(--accent); 
    color: #fff; 
}
.time-select option { 
    background: var(--bg-secondary); 
    color: #fff; 
}

.value-container {
    margin-top: 10px;
    display: flex;
    align-items: baseline;
    height: 50px;
}

.sensor-value { 
    font-family: 'JetBrains Mono', monospace; 
    font-size: 3rem; 
    font-weight: 500; 
    color: #fff; 
    display: inline-block; 
    letter-spacing: -1px;
}

.sensor-value.loading {
    animation: shimmer 1.5s infinite linear;
    background: linear-gradient(90deg, #334155 25%, #475569 50%, #334155 75%);
    background-size: 200% 100%;
    color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
}

.sensor-unit { 
    font-size: 1.1rem; 
    font-weight: 600;
    color: var(--accent); 
    margin-left: 8px; 
    opacity: 0.9;
}

#unit-temp { color: var(--color-temp); }
#unit-hum { color: var(--color-hum); }
#unit-co2 { color: var(--color-co2); }
#unit-lux { color: var(--color-lux); }
#unit-press { color: var(--color-press); }

.chart-container {
    position: relative;
    height: 180px;
    width: 100%;
    margin-top: 25px;
}

canvas { 
    width: 100% !important; 
    height: 100% !important; 
}

footer {
    text-align: center;
    margin-top: 60px;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.85rem;
}

/**
 * Animations
 */

@keyframes pulse-ring { 
    0% { transform: scale(0.8); opacity: 0.5; } 
    50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 20px #00ff88; } 
    100% { transform: scale(0.8); opacity: 0.5; } 
}

@keyframes shimmer {
    to { background-position: -200% 0; }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.sensor-card:nth-child(1) { animation-delay: 0.1s; }
.sensor-card:nth-child(2) { animation-delay: 0.2s; }
.sensor-card:nth-child(3) { animation-delay: 0.3s; }
.sensor-card:nth-child(4) { animation-delay: 0.4s; }
.sensor-card:nth-child(5) { animation-delay: 0.5s; }

@media (max-width: 768px) {
    h1 { font-size: 2.2rem; }
    .sensor-card { padding: 20px; border-radius: 20px; }
    .sensor-value { font-size: 2.2rem; }
}