/* ---------- Global Reset & Body ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #eef2ff 0%, #e2e8f0 100%);
    color: #333;
}

/* ---------- Header & Navbar ---------- */
.header-wrapper {
    background-color: #fff;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
    position: sticky;
    top: 0;
    z-index: 10;
    margin-bottom: 40px; /* spacing below header */
}
.nav-container {
    max-width: 1200px;
    height: 70px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.logo {
    font-size: 1.6rem;
    font-weight: bold;
    color: #333; /* Changed from blue to blackish-gray */
}
nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}
nav li a {
    text-decoration: none;
    color: #4b5563;
    font-weight: 500;
    transition: color 0.3s;
}
nav li a:hover {
    color: #1f2937;
}

/* ---------- Hero Section ---------- */
.hero {
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.05);
    text-align: center;
    max-width: 1200px;
    margin: 0 auto 60px; /* some bottom spacing so it doesn't squish features */
    padding: 60px 0;     /* vertical padding */
}
.hero-inner {
    max-width: 800px; /* narrower content inside hero */
    margin: 0 auto;
    padding: 0 20px;
}
.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #111827;
}
.hero p {
    font-size: 1.15rem;
    line-height: 1.6;
    color: #4b5563;
    margin-bottom: 30px;
}

.action-buttons {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
}
.action-buttons a.download-link {
    display: inline-flex;
    align-items: center;
    padding: 15px 30px;
    font-weight: 600;
    text-decoration: none;
    color: #fff;
    background-color: #333; /* Changed from blue to blackish-gray */
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(51, 51, 51, 0.3); /* Adjusted shadow color */
    transition: transform 0.3s, background-color 0.3s;
}
.action-buttons a.download-link:hover {
    transform: translateY(-5px);
    background-color: #1f1f1f; /* Changed from blue to darker blackish-gray */
}
.logo-icon {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    vertical-align: middle;
}

/* ---------- Features Section ---------- */
.features {
    margin-bottom: 60px; /* spacing under features */
}
.features-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    padding: 0 20px;
}
.feature-card {
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
    padding: 30px;
    text-align: center;
    transition: transform 0.3s;
}
.feature-card:hover {
    transform: translateY(-5px);
}
.feature-title {
    font-size: 1.2rem;
    margin-bottom: 10px;
    font-weight: 600;
    color: #333; /* Changed from blue to blackish-gray */
}
.feature-desc {
    font-size: 0.95rem;
    color: #4b5563;
    line-height: 1.5;
}

/* ---------- API Section ---------- */
.api-section-cta {
    margin: 0 auto 60px;
    text-align: center;
}
.api-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}
.api-section-cta h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #111827;
}
.api-section-cta a {
    color: #333; /* Changed from blue to blackish-gray */
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
}
.api-section-cta a:hover {
    text-decoration: underline;
}

/* ---------- Footer ---------- */
footer {
    text-align: center;
    color: #6b7280;
    padding: 20px 0;
}
.footer-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}
.footer-container p {
    font-size: 0.9rem;
}
.footer-container a {
    color: #333; /* Changed from blue to blackish-gray */
    text-decoration: none;
}
.footer-container a:hover {
    text-decoration: underline;
}

/* ---------- Responsive for <= 768px ---------- */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.2rem;
    }
    .hero p {
        font-size: 1rem;
    }
    .action-buttons a.download-link {
        margin-bottom: 10px;
    }
    .features-container {
        grid-template-columns: 1fr; /* single column on mobile */
    }
    .hero {
        margin: 20px auto; /* reduce top/bottom margin on mobile */
        padding: 40px 0; 
    }
}

/* Example highlight styling */
.highlight-os {
    outline: 3px solid #FFD700; 
    transition: outline 0.3s;
}