* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #ffffff;
    --surface: transparent;
    --border: rgba(0, 0, 0, 0.12);
    --text: #0a0a0a;
    --muted: rgba(0, 0, 0, 0.72);
    --muted-2: rgba(0, 0, 0, 0.52);
    --link: #2563eb;
    --link-hover: #1d4ed8;
    --focus: rgba(0, 0, 0, 0.25);
    --radius: 12px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #09090b;
        --surface: rgba(255, 255, 255, 0.04);
        --border: rgba(255, 255, 255, 0.12);
        --text: #fafafa;
        --muted: rgba(255, 255, 255, 0.72);
        --muted-2: rgba(255, 255, 255, 0.52);
        --link: #60a5fa;
        --link-hover: #93c5fd;
        --focus: rgba(255, 255, 255, 0.25);
    }
}

body {
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.55;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
    padding: 56px 24px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
}

header h1 {
    font-size: clamp(2.4rem, 4.5vw, 3.6rem);
    color: var(--text);
    margin-bottom: 28px;
    font-weight: 600;
    letter-spacing: -0.03em;
    text-align: left;
    line-height: 1.05;
}

.description {
    margin-bottom: 44px;
}

.description p {
    font-size: 1.05rem;
    color: var(--muted);
    margin-bottom: 18px;
    line-height: 1.75;
    text-align: left;
    max-width: 70ch;
}

.cta {
    margin: 34px 0 38px;
    text-align: left;
}

.cta-button {
    display: inline;
    padding: 0;
    background: none;
    border: 0;
    border-radius: 0;
    color: var(--link);
    text-decoration: underline;
    text-decoration-thickness: 1px;
    text-underline-offset: 0.2em;
    font-size: 1.05rem;
    font-weight: 600;
    transition: color 0.15s ease;
}

.cta-button:hover {
    color: var(--link-hover);
}

.cta-button:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 3px;
}

footer {
    margin-top: 52px;
    padding-top: 22px;
    border-top: 1px solid var(--border);
    text-align: left;
}

footer p {
    color: var(--muted-2);
    font-size: 0.95rem;
}

@media (max-width: 768px) {
    header h1 {
        margin-bottom: 22px;
    }

    .description p {
        font-size: 1rem;
    }

    .cta-button {
        padding: 12px 16px;
    }
}

@media (min-width: 820px) {
    body {
        padding: 72px 32px;
    }
}