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

:root {
    --primary-color: #2563eb;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #334155;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding: 30px;
    background: var(--card-bg);
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 20px;
}

.connection-status {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 25px;
    font-size: 0.9rem;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--danger-color);
    animation: pulse 2s infinite;
}

.connection-status.connected .status-dot {
    background: var(--success-color);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

main {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

/* Tab Navigation */
.tab-navigation {
    display: flex;
    gap: 10px;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

.tab-button {
    flex: 1;
    padding: 15px 30px;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-button:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.tab-button.active {
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    border-color: #3b82f6;
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* Tab Content */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

section {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

h2 {
    font-size: 1.8rem;
    margin-bottom: 25px;
    color: var(--text-primary);
}

/* Sensor Grid */
.sensor-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.sensor-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.sensor-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(37, 99, 235, 0.2);
}

.sensor-icon {
    font-size: 3rem;
}

.sensor-info {
    flex: 1;
}

.sensor-info h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.sensor-value {
    font-size: 2.5rem;
    font-weight: bold;
    color: var(--primary-color);
    line-height: 1;
}

.sensor-unit {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-top: 5px;
}

.sensor-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* LED Control Grid */
.led-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.led-control {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    transition: transform 0.3s ease;
}

 .red {
        background: rgba(235, 22, 22, 0.4);

}



 .blue {
        background: rgba(36, 22, 235, 0.4);

}
.yellow {
        background: rgba(233, 250, 3, 0.918);

}

.green {
        background: rgba(47, 248, 29, 0.4);

}
.led-control:hover {
    transform: translateY(-5px);
}

.led-control h3 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.led-status {
    font-size: 1.1rem;
    font-weight: bold;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger-color);
}

.led-status.on {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success-color);
}

.btn {
    width: 100%;
    padding: 12px;
    margin: 5px 0;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-on {
    background: var(--success-color);
    color: white;
}

.btn-on:hover {
    background: #059669;
    transform: scale(1.05);
}

.btn-off {
    background: var(--danger-color);
    color: white;
}

.btn-off:hover {
    background: #dc2626;
    transform: scale(1.05);
}

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

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pin-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 10px;
}

/* Button Status Cards */
.button-card {
    border: 2px solid var(--border-color);
}

.button-status {
    font-size: 1rem;
    font-weight: bold;
    padding: 10px 15px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.05);
    margin: 10px 0;
    transition: all 0.3s ease;
}

.button-status.pressed {
    background: var(--warning-color);
    color: var(--bg-color);
    animation: buttonPress 0.3s ease;
}

@keyframes buttonPress {
    0% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
    }
}

/* Footer */
footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    .tab-navigation {
        flex-direction: column;
    }

    .tab-button {
        padding: 12px 20px;
        font-size: 1rem;
    }

    .sensor-grid,
    .led-grid {
        grid-template-columns: 1fr;
    }

    .sensor-card {
        flex-direction: column;
        text-align: center;
    }
}