.class-hero {
    max-width: 960px;
}

.class-intro {
    display: grid;
    grid-template-columns: minmax(260px, 1fr) minmax(320px, 1.2fr) minmax(160px, 0.5fr);
    align-items: center;
    gap: 24px;
    padding: 24px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: var(--surface);
    box-shadow: var(--shadow);
}

.intro-label {
    display: block;
    margin-bottom: 5px;
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.class-intro h2 {
    margin: 0;
    font-size: 1rem;
}

.class-intro > code {
    overflow-x: auto;
    padding: 12px 14px;
    white-space: nowrap;
}

.class-intro > p {
    padding: 12px;
    border-radius: 10px;
    background: #f0fdf4;
}

.class-index {
    position: sticky;
    z-index: 20;
    top: 88px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 26px 0 56px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 15px;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(14px);
    box-shadow: 0 8px 24px rgba(37, 99, 235, 0.07);
}

.class-index a {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 13px;
    border-radius: 9px;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
    text-decoration: none;
}

.class-index a:hover {
    color: var(--accent-dark);
    background: var(--accent-soft);
}

.utility-section {
    scroll-margin-top: 164px;
    margin-bottom: 64px;
}

.section-heading {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.section-icon {
    display: grid;
    flex: none;
    place-items: center;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    color: var(--accent);
    background: var(--accent-soft);
    font-size: 1.2rem;
}

.section-heading h2 {
    margin: 0;
    font-size: 1.2rem;
}

.section-heading p {
    margin: 4px 0 0;
    color: var(--muted);
    font-size: 0.85rem;
}

.utility-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 14px;
}

.utility-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    min-height: 300px;
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 17px;
    background: var(--surface);
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.utility-card:hover {
    transform: translateY(-3px);
    border-color: #b9cdf7;
    box-shadow: var(--shadow);
}

.utility-demo {
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 112px;
    padding: 18px;
    border-bottom: 1px solid var(--line);
    background: #fbfdff;
    font-size: 1rem;
}

.utility-content {
    padding: 17px 18px 10px;
}

.utility-content code {
    display: inline-block;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.utility-content h3 {
    margin: 13px 0 4px;
    font-size: 0.94rem;
}

.utility-content p {
    margin: 0;
    color: var(--muted);
    font-size: 0.8rem;
}

.copy-class {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    gap: 7px;
    margin: auto 18px 17px;
    padding: 8px 11px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--muted);
    background: var(--surface);
    font-size: 0.76rem;
    font-weight: 700;
    cursor: pointer;
}

.copy-class:hover {
    border-color: #b9cdf7;
    color: var(--accent-dark);
    background: var(--accent-soft);
}

.demo-line,
.demo-height {
    width: 100%;
    padding: 12px;
    border: 1px dashed #bfd0ed;
    border-radius: 8px;
}

.demo-box {
    display: grid;
    place-items: center;
    min-width: 38px;
    height: 38px;
    padding: 0 10px;
    border-radius: 8px;
    color: var(--accent-dark);
    background: var(--accent-soft);
}

.demo-box.tall {
    height: 62px;
}

.demo-wrap {
    max-width: 170px;
}

.demo-height-box {
    height: 76px;
    padding: 7px;
    border: 1px dashed #bfd0ed;
    border-radius: 9px;
}

.demo-circle {
    display: grid;
    place-items: center;
    width: 58px;
    height: 58px;
    font-style: normal;
    font-weight: 700;
}

.demo-col {
    display: grid;
    place-items: center;
    min-height: 42px;
    border-radius: 7px;
    color: var(--accent-dark);
    background: var(--accent-soft);
    font-style: normal;
}

.demo-overflow {
    width: 150px;
    padding: 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    white-space: nowrap;
}

@media (max-width: 960px) {
    .class-intro {
        grid-template-columns: 1fr 1fr;
    }

    .class-intro > p {
        grid-column: 1 / -1;
    }

    .utility-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .class-intro {
        grid-template-columns: 1fr;
        gap: 16px;
        padding: 17px;
    }

    .class-intro > p {
        grid-column: auto;
    }

    .class-index {
        top: 82px;
        margin-bottom: 42px;
    }

    .class-index a {
        flex: 1 1 calc(33.333% - 8px);
        justify-content: center;
        padding: 8px;
    }

    .utility-grid {
        grid-template-columns: 1fr;
    }

    .utility-card {
        min-height: 280px;
    }
}