:root {
    --guide-background: #ffffff;
    --guide-text: #111111;
    --guide-subtext: #666666;
    --guide-line: #e8e8e8;
    --guide-soft: #f7f7f7;
    --guide-accent: #666666;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--guide-background);
    color: var(--guide-text);
    font-family: sans-serif;
    line-height: 1.8;
}

a {
    color: inherit;
}

a:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--guide-accent);
    outline-offset: 4px;
}

.skip-link {
    position: absolute;
    top: 12px;
    left: 12px;
    z-index: 2;
    padding: 8px 12px;
    background: var(--guide-text);
    color: #ffffff;
    transform: translateY(-160%);
}

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

.guide-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    width: min(100% - 48px, 920px);
    margin: 0 auto;
    padding: 28px 0;
    border-bottom: 1px solid var(--guide-line);
}

.guide-brand {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-decoration: none;
}

.guide-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 16px;
    font-size: 14px;
}

.guide-nav a {
    color: var(--guide-subtext);
    text-underline-offset: 4px;
}

.guide-nav a[aria-current="page"] {
    color: var(--guide-text);
    font-weight: 700;
}

.guide-main {
    width: min(100% - 48px, 760px);
    margin: 0 auto;
    padding: 28px 0 96px;
}

.breadcrumb {
    color: var(--guide-subtext);
    font-size: 13px;
}

.breadcrumb a {
    text-underline-offset: 4px;
}

.guide-hero {
    padding: 72px 0 80px;
}

.eyebrow,
.section-number {
    margin: 0;
    color: var(--guide-accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.guide-hero h1 {
    max-width: 680px;
    margin: 16px 0 24px;
    font-size: clamp(32px, 7vw, 54px);
    line-height: 1.35;
    letter-spacing: -0.04em;
}

.guide-lead {
    max-width: 640px;
    margin: 0;
    color: var(--guide-subtext);
    font-size: 17px;
    line-height: 2;
}

.guide-cta {
    display: inline-block;
    margin-top: 32px;
    padding: 13px 24px;
    border-radius: 12px;
    background: var(--guide-text);
    color: #ffffff;
    font-size: 15px;
    font-weight: 700;
    text-decoration: none;
}

.guide-cta:hover,
.guide-cta:focus-visible {
    background: #333333;
}

.guide-section {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 24px;
    padding: 48px 0;
    border-top: 1px solid var(--guide-line);
}

.guide-section h2 {
    margin: 0 0 20px;
    font-size: 28px;
    line-height: 1.45;
}

.guide-section h3 {
    margin: 0;
    font-size: 17px;
    line-height: 1.5;
}

.guide-section p {
    margin: 0;
    color: var(--guide-subtext);
    font-size: 15px;
}

.guide-section p + p {
    margin-top: 18px;
}

.level-cards,
.step-list {
    margin: 28px 0 0;
    padding: 0;
    list-style: none;
}

.level-cards {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
}

.level-cards li {
    padding: 20px;
    border: 1px solid var(--guide-line);
    border-radius: 12px;
    background: var(--guide-soft);
}

.level-cards p {
    margin-top: 8px;
    font-size: 14px;
}

.level-name {
    display: block;
    margin-bottom: 8px;
    color: var(--guide-accent);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.step-list {
    counter-reset: steps;
}

.step-list li {
    position: relative;
    padding: 0 0 24px 40px;
    border-left: 1px solid var(--guide-line);
    counter-increment: steps;
}

.step-list li::before {
    content: counter(steps);
    position: absolute;
    top: 0;
    left: -14px;
    display: grid;
    width: 28px;
    height: 28px;
    place-items: center;
    border: 1px solid var(--guide-line);
    border-radius: 50%;
    background: #ffffff;
    color: var(--guide-accent);
    font-size: 12px;
    font-weight: 700;
}

.step-list li:last-child {
    padding-bottom: 0;
    border-left-color: transparent;
}

.step-list p {
    margin-top: 6px;
}

.text-link,
.resource-links a {
    display: inline-block;
    margin-top: 24px;
    color: var(--guide-text);
    font-size: 14px;
    font-weight: 700;
    text-underline-offset: 4px;
}

.resource-links {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
}

.resource-links a {
    margin-top: 24px;
}

.faq-section details {
    border-top: 1px solid var(--guide-line);
}

.faq-section details:last-child {
    border-bottom: 1px solid var(--guide-line);
}

.faq-section summary {
    cursor: pointer;
    padding: 18px 32px 18px 0;
    font-size: 16px;
    font-weight: 700;
    list-style: none;
}

.faq-section summary::-webkit-details-marker {
    display: none;
}

.faq-section summary::after {
    content: "+";
    float: right;
    color: var(--guide-accent);
    font-size: 20px;
    font-weight: 400;
}

.faq-section details[open] summary::after {
    content: "−";
}

.faq-section details p {
    padding: 0 32px 20px 0;
}

.guide-final-cta {
    margin-top: 48px;
    padding: 40px;
    border-radius: 16px;
    background: var(--guide-soft);
    text-align: center;
}

.guide-final-cta h2 {
    margin: 0;
    font-size: 25px;
}

.guide-final-cta p {
    margin: 12px 0 0;
    color: var(--guide-subtext);
    font-size: 15px;
}

.guide-final-cta .guide-cta {
    margin-top: 24px;
}

.guide-footer {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px;
    padding: 28px 24px;
    border-top: 1px solid var(--guide-line);
    color: var(--guide-subtext);
    font-size: 13px;
}

.guide-footer a {
    text-underline-offset: 4px;
}

@media (max-width: 620px) {
    .guide-header {
        align-items: flex-start;
        flex-direction: column;
    }

    .guide-nav {
        justify-content: flex-start;
    }

    .guide-hero {
        padding: 56px 0 64px;
    }

    .guide-section {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .level-cards {
        grid-template-columns: 1fr;
    }

    .guide-final-cta {
        padding: 32px 24px;
    }
}