/* General Reset */
body {
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
    color: #333;
    line-height: 1.6;
}

/* Navigation */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 50px;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}
.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: #0000AF; /* Updated Blue */
}
.nav-links a {
    text-decoration: none;
    color: #555;
    margin-left: 20px;
    font-weight: 600;
}
.nav-links a:hover {
    color: #0000AF; /* Updated Blue */
}
.nav-links .btn-download {
    background-color: #0000AF; /* Updated Blue */
    color: white;
    padding: 10px 20px;
    border-radius: 5px;
    transition: background-color 0.3s;
}
.nav-links .btn-download:hover {
    background-color: #000080; /* Slightly darker on hover */
    color: white;
}

/* Hero Section */
.hero {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 80px 50px;
    background-color: #f9fbfd;
}
.hero-content {
    max-width: 50%;
}
.hero h1 {
    font-size: 3.5rem;
    line-height: 1.1;
    margin-bottom: 20px;
    color: #1a1a1a;
}
.hero p {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 30px;
}
.hero-buttons {
    display: flex;
    gap: 15px;
}
.btn-primary {
    background-color: #0000AF; /* Updated Blue */
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: background-color 0.3s;
}
.btn-primary:hover {
    background-color: #000080; /* Darker blue on hover */
}
.btn-secondary {
    background-color: white;
    color: #0000AF; /* Updated Blue text */
    border: 2px solid #0000AF; /* Updated Blue border */
    padding: 13px 30px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 600;
    transition: all 0.3s;
}
.btn-secondary:hover {
    background-color: #f0f0ff;
}

/* Visual Placeholders */
.schematic-placeholder, .video-placeholder {
    background-color: #e0e0e0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #888;
    font-weight: bold;
    border: 2px dashed #ccc;
}
.schematic-placeholder {
    width: 500px;
    height: 400px;
    border-radius: 10px;
}
.video-container {
    max-width: 800px;
    margin: 0 auto;
}
.video-placeholder {
    width: 100%;
    height: 450px;
    border-radius: 10px;
}

/* Sections */
.section-demo {
    text-align: center;
    padding: 80px 20px;
    background-color: white;
}
.section-features {
    display: flex;
    justify-content: space-around;
    padding: 80px 50px;
    background-color: #f4f6f8;
}
.feature-card {
    background: white;
    padding: 30px;
    border-radius: 8px;
    width: 25%;
    box-shadow: 0 4px 10px rgba(0,0,0,0.05);
    text-align: center;
    border-top: 4px solid #0000AF; /* Updated Blue */
}

/* Footer */
footer {
    text-align: center;
    padding: 40px;
    background-color: #1a1a1a;
    color: #888;
}
.footer-links a {
    color: #ddd;
    margin: 0 10px;
    text-decoration: none;
}
.footer-links a:hover {
    color: #fff;
    text-decoration: underline;
}