:root {
    --primary-green: #2ecc71;
    --dark-green: #27ae60;
    --bg-dark: #1a1a2e;
    --text-light: #f5f6fa;
}

body, html {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
    height: 100vh;
}

.hero {
    display: flex;
    flex-direction: column;
    height: 100%;
    padding: 2rem 5%;
    box-sizing: border-box;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-green);
}

.nav-link {
    color: var(--text-light);
    text-decoration: none;
    border: 1px solid var(--primary-green);
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background-color: var(--primary-green);
    color: var(--bg-dark);
}

.content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

h1 {
    font-size: 4rem;
    margin-bottom: 1rem;
}

p {
    font-size: 1.2rem;
    color: #a4b0be;
    line-height: 1.6;
    margin-bottom: 3rem;
}

.demo-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 2rem;
    max-width: 400px;
    margin: 0 auto;
}

.sensor-data {
    display: flex;
    justify-content: space-around;
    margin-top: 1.5rem;
}

.data-point {
    display: flex;
    flex-direction: column;
}

.label {
    font-size: 0.9rem;
    color: #a4b0be;
    margin-bottom: 0.5rem;
}

.value {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-green);
}

.pulse {
    animation: pulse-animation 2s infinite;
}

@keyframes pulse-animation {
    0% { opacity: 1; }
    50% { opacity: 0.5; color: #f1c40f; }
    100% { opacity: 1; }
}