:root {
    --navy: #071b34;
    --navy-deep: #04101f;
    --navy-panel: #0b294c;
    --sky: #35a7ff;
    --violet: #8f62ff;
    --gold: #ffd95e;
    --paper: #fff8e8;
    --muted: #c9dbef;
    --line: rgba(255, 255, 255, 0.16);
    color-scheme: dark;
}

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

html {
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--paper);
    background: linear-gradient(145deg, var(--navy) 0%, var(--navy-deep) 72%);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 1rem;
    line-height: 1.65;
}

a {
    color: var(--sky);
    text-underline-offset: 0.2em;
}

a:hover {
    color: var(--gold);
}

:focus-visible {
    outline: 0.2rem solid var(--gold);
    outline-offset: 0.2rem;
}

.container {
    width: calc(100% - 2rem);
    max-width: 72rem;
    margin-inline: auto;
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.7rem 1rem;
    color: var(--navy-deep);
    background: var(--gold);
    font-weight: 800;
    transform: translateY(-200%);
}

.skip-link:focus {
    transform: translateY(0);
}

.site-header {
    border-bottom: 1px solid var(--line);
    background: rgba(4, 16, 31, 0.94);
}

.header-inner,
.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
}

.header-inner {
    min-height: 4.5rem;
}

.site-brand {
    color: var(--paper);
    font-size: 1.2rem;
    font-weight: 900;
    text-decoration: none;
}

.site-nav ul,
.site-footer ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem 1.25rem;
    margin: 0;
    padding: 0;
    list-style: none;
}

.site-nav a,
.site-footer a {
    color: var(--muted);
    font-weight: 700;
    text-decoration: none;
}

.site-nav a:hover,
.site-footer a:hover {
    color: var(--gold);
}

.nav-toggle {
    display: none;
    min-height: 2.75rem;
    padding: 0.45rem 0.85rem;
    border: 1px solid var(--line);
    border-radius: 0.45rem;
    color: var(--paper);
    background: var(--navy-panel);
    font: inherit;
    font-weight: 800;
}

.site-main {
    min-height: 60vh;
    padding-block: clamp(2.5rem, 7vw, 5rem);
}

.article {
    width: calc(100% - 2rem);
    max-width: 65ch;
    margin-inline: auto;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
    gap: 1.25rem;
}

.card {
    padding: 1.4rem;
    border: 1px solid var(--line);
    border-radius: 0.75rem;
    background: linear-gradient(150deg, rgba(53, 167, 255, 0.11), rgba(143, 98, 255, 0.08)), var(--navy-panel);
}

.site-footer {
    padding-block: 2rem;
    border-top: 1px solid var(--line);
    color: var(--muted);
    background: var(--navy-deep);
}

.site-footer p {
    margin: 0;
}

.ad-slot {
    min-height: 6rem;
    margin-block: 2rem;
    border: 1px solid var(--line);
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 56rem) {
    .header-inner,
    .footer-inner {
        align-items: stretch;
        flex-direction: column;
    }

    .header-inner {
        position: relative;
        padding-block: 1rem;
    }

    .nav-toggle {
        position: absolute;
        top: 0.8rem;
        right: 0;
        display: block;
    }

    .site-nav ul,
    .site-footer ul,
    .card-grid {
        grid-template-columns: 1fr;
    }

    .site-nav ul {
        display: grid;
        padding-top: 0.75rem;
    }

    .site-header[data-open="false"] .site-nav {
        display: none;
    }

    .site-header[data-open="true"] .site-nav {
        display: block;
    }

    .footer-inner {
        gap: 1rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }
}