:root {
    --blue: #3c6f92;
    --blue-dark: #2c566f;
    --sand: #f7f3ef;
    --brown: #5c3b1f;
    --text: #1f2a32;
    --white: #ffffff;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family:
        "Nunito",
        system-ui,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;
    color: var(--text);
    background: var(--sand);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
    border-radius: 12px;
}

a {
    color: inherit;
}

.hero {
    background: linear-gradient(135deg, var(--blue), var(--blue-dark));
    color: var(--white);
    padding: 2rem clamp(1rem, 4vw, 4rem) 4rem;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
}

.logo img {
    width: 48px;
    height: 48px;
    border-radius: 12px;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-weight: 600;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.85);
}

.nav-links a:hover {
    color: var(--white);
}

.hero-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 3rem;
    margin-top: 3rem;
    align-items: center;
}

.hero-text h1 {
    font-size: clamp(2rem, 4vw, 3.25rem);
    margin-bottom: 1rem;
}

.hero-text p {
    max-width: 520px;
}

.hero-image {
    text-align: center;
}

.hero-image img {
    width: clamp(240px, 55vw, 900px);
    margin: 0 auto;
}

.eyebrow {
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.7);
}

.cta-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 1.5rem 0;
}

.cta {
    padding: 0.85rem 1.75rem;
    border-radius: 999px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    background: var(--white);
    color: var(--blue-dark);
    transition: transform 0.2s ease;
}

.cta:hover {
    transform: translateY(-2px);
}

.cta.ghost {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.6);
    color: var(--white);
}

.version {
    font-size: 0.95rem;
    opacity: 0.8;
}

main {
    padding: 0 clamp(1rem, 4vw, 4rem) 4rem;
}

.section {
    background: var(--white);
    margin-top: 3rem;
    padding: clamp(1.5rem, 3vw, 3rem);
    border-radius: 24px;
    box-shadow: 0 25px 60px rgba(34, 42, 53, 0.08);
}

.section-heading span {
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--blue-dark);
    font-weight: 700;
}

.section-heading h2 {
    margin-top: 0.3rem;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
}

.feature-list {
    list-style: none;
    padding: 0;
    margin-top: 1.5rem;
    display: grid;
    gap: 0.75rem;
}

.feature-list li {
    padding-left: 1.5rem;
    position: relative;
}

.feature-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--blue-dark);
    font-weight: 700;
}

.split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    align-items: center;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.download-grid ol {
    padding-left: 1.25rem;
}

.usage-steps {
    display: flex;
    gap: 1.5rem;
    margin-top: 2rem;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    padding-bottom: 1rem;
}

.usage-steps article {
    background: var(--sand);
    border-radius: 18px;
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
    flex: 0 0 520px;
    min-height: 360px;
    scroll-snap-align: start;
}

footer {
    text-align: center;
    padding: 2rem 1rem 3rem;
    color: rgba(31, 42, 50, 0.8);
    font-size: 0.95rem;
}

footer a {
    color: var(--blue-dark);
    text-decoration: none;
    font-weight: 600;
}

@media (max-width: 640px) {
    .nav-links {
        flex-direction: column;
        align-items: flex-start;
    }
    .hero {
        padding-bottom: 3rem;
    }
}