:root {
    --color-primary-background: #fff;
    --color-primary-text: #000;
    --color-secondary-background: #000;
    --color-secondary-text: #fff;
    --spacing: 1.5rem;
    --border-radius: 16px;
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    font-size: 1.1rem;
    background-color: var(--color-primary-background);
    color: var(--color-primary-text);
    line-height: 1.7;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing);
}

h1 {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 2;
}

h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing);
    line-height: 1.3;
}

a {
    color: var(--color-secondary-text);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.header {
    text-align: center;
    background: var(--color-secondary-background);
    color: var(--color-secondary-text);
    padding: var(--spacing) 0;
}

.app-branding {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.app-icon {
    width: 64px;
    height: 64px;
}

.download-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing);
    margin-top: var(--spacing);
}

.download-buttons img {
    height: 50px;
}

.download-buttons a:hover img {
    filter: brightness(150%);
}

main {
    padding: var(--spacing) 0;
}

.features-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing);
    margin-bottom: var(--spacing);
}

.feature-item {
    flex: 1 1 calc(33.333% - var(--spacing));
    min-width: 280px;
    max-width: 400px;
    padding: var(--spacing);
    border-radius: var(--border-radius);
    text-align: center;
}

.screenshot-section {
    margin-bottom: var(--spacing);
}

.screenshot-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing);
}

.screenshot-image {
    flex: 1 1 calc(33.333% - var(--spacing));
    width: 300px;
    max-width: 400px;
    height: auto;
    border-radius: var(--border-radius);
}

.footer {
    text-align: center;
    background: var(--color-secondary-background);
    color: var(--color-secondary-text);
    padding: var(--spacing) 0;
}

.footer a {
    font-weight: 600;
    padding: 0 0.5rem;
}

.footer p {
    font-weight: 200;
    margin-top: var(--spacing);
}