:root {
    --primary-white: #F9F9F9;
    --tech-gray: #546E7A;
    --warm-orange: #FF7043;
    --iot-blue: #0288D1;
    --dark-text: #263238;
    --light-gray: #ECEFF1;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--primary-white);
    color: var(--dark-text);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Lexend', sans-serif;
    font-weight: 600;
}

.mono-data {
    font-family: 'JetBrains Mono', monospace;
}

.navbar {
    background-color: rgba(249, 249, 249, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.navbar-brand {
    font-weight: 800;
    color: var(--tech-gray) !important;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 500;
    color: var(--tech-gray) !important;
    margin: 0 10px;
    transition: color 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--warm-orange) !important;
}

.btn-primary {
    background-color: var(--iot-blue);
    border: none;
    padding: 10px 25px;
    border-radius: 8px;
}

.btn-primary:hover {
    background-color: #0277BD;
}

.btn-outline-orange {
    color: var(--warm-orange);
    border: 2px solid var(--warm-orange);
    background: transparent;
}

.btn-outline-orange:hover {
    background-color: var(--warm-orange);
    color: white;
}

.section-padding {
    padding: 80px 0;
}

.card {
    border: none;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    transition: transform 0.3s ease;
}

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

footer {
    background-color: var(--tech-gray);
    color: white;
    padding: 60px 0 30px;
}

.footer-link {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
}

.footer-link:hover {
    color: var(--warm-orange);
}

/* 3D Hero Animation Placeholder */
.hero-3d-container {
    height: 600px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.tech-label {
    position: absolute;
    background: white;
    padding: 5px 15px;
    border-radius: 20px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    font-size: 0.8rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
}

.tech-label::before {
    content: '';
    width: 8px;
    height: 8px;
    background: var(--iot-blue);
    border-radius: 50%;
}