:root {
    color-scheme: light dark;
    --background: #f5f7fb;
    --surface: rgba(255, 255, 255, 0.82);
    --text: #172033;
    --muted: #5d687c;
    --border: rgba(23, 32, 51, 0.12);
    --accent: #087cff;
    --accent-soft: rgba(8, 124, 255, 0.11);
    --shadow: 0 22px 60px rgba(35, 52, 84, 0.12);
}

* {
    box-sizing: border-box;
}

html {
    background: var(--background);
    font-family:
        -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue",
        Arial, sans-serif;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

body {
    min-height: 100vh;
    margin: 0;
    color: var(--text);
    background:
        radial-gradient(circle at 14% 4%, rgba(8, 124, 255, 0.11), transparent 30rem),
        var(--background);
}

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

a:hover {
    text-decoration-thickness: 0.12em;
}

a:focus-visible {
    outline: 3px solid rgba(8, 124, 255, 0.35);
    outline-offset: 4px;
    border-radius: 4px;
}

.skip-link {
    position: fixed;
    top: 1rem;
    left: 1rem;
    z-index: 2;
    padding: 0.65rem 0.9rem;
    border-radius: 0.65rem;
    background: var(--text);
    color: var(--background);
    transform: translateY(-180%);
    transition: transform 140ms ease;
}

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

.page {
    width: min(100% - 2rem, 760px);
    margin: 0 auto;
    padding: clamp(2.5rem, 8vw, 6rem) 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.65rem;
    margin-bottom: 2rem;
    color: var(--text);
    font-size: 0.92rem;
    font-weight: 650;
    letter-spacing: -0.01em;
    text-decoration: none;
}

.brand-mark {
    display: block;
    width: 2rem;
    height: 2rem;
    flex: 0 0 auto;
    border-radius: 0.55rem;
    object-fit: contain;
    box-shadow: 0 8px 20px rgba(11, 31, 63, 0.28);
}

.document {
    padding: clamp(1.5rem, 5vw, 3.5rem);
    border: 1px solid var(--border);
    border-radius: 1.5rem;
    background: var(--surface);
    box-shadow: var(--shadow);
    backdrop-filter: blur(22px);
}

h1,
h2 {
    letter-spacing: -0.035em;
}

h1 {
    max-width: 14ch;
    margin: 0 0 1rem;
    font-size: clamp(2.25rem, 8vw, 4rem);
    font-weight: 720;
    line-height: 1.02;
}

h2 {
    margin: 2.25rem 0 0.65rem;
    font-size: 1.18rem;
    font-weight: 680;
    line-height: 1.25;
}

p,
ul {
    margin: 0 0 1rem;
}

ul {
    padding-left: 1.2rem;
}

li + li {
    margin-top: 0.5rem;
}

.intro {
    max-width: 58ch;
    color: var(--muted);
    font-size: 1.08rem;
}

.note {
    margin: 1.75rem 0;
    padding: 1rem 1.1rem;
    border: 1px solid rgba(8, 124, 255, 0.18);
    border-radius: 0.9rem;
    background: var(--accent-soft);
}

.meta {
    margin-top: 2.5rem;
    color: var(--muted);
    font-size: 0.9rem;
}

.page-footer {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    justify-content: space-between;
    margin-top: 1.25rem;
    padding: 0 0.4rem;
    color: var(--muted);
    font-size: 0.88rem;
}

@media (prefers-color-scheme: dark) {
    :root {
        --background: #0c1018;
        --surface: rgba(25, 31, 43, 0.8);
        --text: #f4f7ff;
        --muted: #a9b3c6;
        --border: rgba(255, 255, 255, 0.1);
        --accent: #54a8ff;
        --accent-soft: rgba(84, 168, 255, 0.12);
        --shadow: 0 24px 70px rgba(0, 0, 0, 0.34);
    }

    body {
        background:
            radial-gradient(circle at 14% 4%, rgba(33, 137, 255, 0.14), transparent 30rem),
            var(--background);
    }
}

@media (max-width: 520px) {
    .page {
        width: min(100% - 1.25rem, 760px);
        padding: 1.5rem 0;
    }

    .brand {
        margin: 0 0 1.25rem 0.35rem;
    }

    .document {
        border-radius: 1.15rem;
    }

    .page-footer {
        padding: 0 0.35rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}