:root {
    --background-color: #121212; /* Almost black */
    --surface-color: #1E1E1E;    /* Dark grey for cards */
    --primary-color: #007AFF;    /* Vibrant blue for accents */
    --on-background-color: #E0E0E0; /* Light grey for text */
    --on-surface-color: #FFFFFF;  /* White for headings */

    --font-family-headings: 'Poppins', sans-serif;
    --font-family-body: 'Roboto', sans-serif;

    --shadow-color: rgba(0, 122, 255, 0.2);
}

body {
    font-family: var(--font-family-body);
    line-height: 1.8;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    /* Subtle noise texture */
    background-image: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSIxMDAiIGhlaWdodD0iMTAwIj48ZmlsdGVyIGlkPSJub2lzZSI+PGZlVHVyYnVsZW5jZSB0eXBlPSJmcmFjdGFsTm9pc2UiIGJhc2VGcmVxdWVuY3k9IjAuOCIgbnVtT2N0YXZlcz0iMyIgc3RpdGNoVGlsZXM9InN0aXRjaCIvPjwvZmlsdGVyPjxyZWN0IHdpZHRoPSIxMDAlIiBoZWlnaHQ9IjEwMCUiIGZpbHRlcj0idXJsKCNub2lzZSkiIG9wYWNpdHk9IjAuMDIiLz48L3N2Zz4=');
    color: var(--on-background-color);
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 1rem;
}

header {
    padding: 2rem 0;
    text-align: center;
    border-bottom: 1px solid var(--surface-color);
}

header h1 {
    font-family: var(--font-family-headings);
    font-size: 2.5rem;
    color: var(--on-surface-color);
    margin: 0;
}

header p {
    font-size: 1.1rem;
    margin: 0.25rem 0 0;
}

main {
    padding: 2rem 1rem;
}

section {
    background: var(--surface-color);
    margin-bottom: 2rem;
    padding: 2.5rem;
    border-radius: 16px;
    /* Soft, deep shadow to look 'lifted' */
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2), 0 0 0 1px rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

section h2 {
    font-family: var(--font-family-headings);
    font-size: 2rem;
    color: var(--on-surface-color);
    margin-top: 0;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
    display: inline-block;
}

/* Hero Section */
#hero {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.hero-content {
    flex: 1;
}

.hero-content h2 {
    font-size: 2.8rem;
    line-height: 1.2;
    border-bottom: none;
}

.hero-image {
    flex-basis: 300px;
}

.app-icon-shadow {
    border-radius: 25%; /* Match app icon shape */
    box-shadow: 0 20px 40px var(--shadow-color);
}

/* Buttons */
.cta-buttons {
    margin-top: 2rem;
}

.button {
    display: inline-block;
    font-family: var(--font-family-headings);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.8rem 2rem;
    text-decoration: none;
    border-radius: 8px;
    margin-right: 1rem;
    transition: all 0.3s ease;
}

.button-primary {
    background-color: var(--primary-color);
    color: var(--on-surface-color);
    box-shadow: 0 5px 15px var(--shadow-color);
}

.button-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--shadow-color);
}

.button-secondary {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.button-secondary:hover {
    background-color: var(--primary-color);
    color: var(--on-surface-color);
}

/* Features Section */
.feature-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-item h3 {
    font-family: var(--font-family-headings);
    font-size: 1.4rem;
    color: var(--on-surface-color);
}

/* FAQ Section */
#faq dl {
    margin-top: 2rem;
}

#faq dt {
    font-family: var(--font-family-headings);
    color: var(--primary-color);
    font-size: 1.1rem;
    margin-top: 1.5rem;
}

#faq dd {
    margin-left: 0;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--surface-color);
}

footer {
    text-align: center;
    padding: 2rem 0;
    margin-top: 2rem;
    border-top: 1px solid var(--surface-color);
}

/* Responsive */
@media (max-width: 768px) {
    #hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-image {
        margin-top: 2rem;
    }
}