:root {
    color-scheme: dark;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    background: var(--kyvanon-color-graphite);
}

body {
    margin: 0;
    min-width: 320px;
    background: var(--kyvanon-color-graphite);
    color: var(--kyvanon-color-cloud-white);
    font-family: var(--kyvanon-font-body);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

main {
    display: grid;
    min-height: 100svh;
    place-items: center;
    padding: var(--kyvanon-space-8) var(--kyvanon-space-3);
}

.hero {
    display: flex;
    width: min(100%, 760px);
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.brand-mark {
    display: block;
    width: min(100%, 341px);
    height: auto;
    margin-bottom: var(--kyvanon-space-4);
}

.copy {
    display: flex;
    flex-direction: column;
    align-items: center;
}

h1,
p {
    margin: 0;
}

.slogan {
    font-family: var(--kyvanon-font-display);
    font-size: 36px;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.18;
    text-wrap: balance;
}

.description {
    max-width: 42ch;
    margin-top: var(--kyvanon-space-3);
    color: var(--kyvanon-color-steel);
    font-size: 18px;
    line-height: 1.6;
    text-wrap: pretty;
}

.open-source {
    margin-top: var(--kyvanon-space-3);
    color: var(--kyvanon-color-cloud-white);
    font-size: 16px;
    line-height: 1.6;
}

.primary-action {
    display: inline-flex;
    min-height: 48px;
    align-items: center;
    justify-content: center;
    gap: var(--kyvanon-space-1);
    margin-top: var(--kyvanon-space-4);
    padding: 12px var(--kyvanon-space-3);
    border: 1px solid transparent;
    border-radius: 12px;
    background: var(--kyvanon-color-signal-blue);
    color: var(--kyvanon-color-graphite);
    font-size: 16px;
    font-weight: 600;
    line-height: 1.5;
    text-decoration: none;
    transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.primary-action:hover {
    border-color: var(--kyvanon-color-signal-blue);
    background: transparent;
    color: var(--kyvanon-color-cloud-white);
}

.primary-action:active {
    border-color: var(--kyvanon-color-accessible-blue);
    background: var(--kyvanon-color-accessible-blue);
    color: var(--kyvanon-color-white);
}

.primary-action:focus-visible {
    outline: 3px solid var(--kyvanon-color-kinetic-mint);
    outline-offset: 4px;
}

@media (max-width: 480px) {
    main {
        padding-block: var(--kyvanon-space-6);
    }

    .brand-mark {
        width: 280px;
        margin-bottom: var(--kyvanon-space-3);
    }

    .slogan {
        font-size: 26px;
        letter-spacing: -0.01em;
        line-height: 1.25;
    }

    .description {
        font-size: 16px;
    }

    .primary-action {
        width: 100%;
        max-width: 280px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .primary-action {
        transition: none;
    }
}