/* About page additions. The landing-page stylesheet remains unchanged. */

.page-return {
    display: inline-flex;
    gap: 8px;
    align-items: center;
    color: var(--muted);
    font-size: 0.76rem;
    font-weight: 650;
    letter-spacing: 0.06em;
    text-decoration: none;
    text-transform: uppercase;
    transition:
        color 160ms ease,
        transform 160ms ease;
}

.page-return:hover {
    color: var(--teal-dark);
    transform: translateY(-1px);
}

.about-hero {
    max-width: 1000px;
    padding:
        clamp(92px, 13vw, 174px)
        0
        clamp(88px, 11vw, 138px);
}

.about-section {
    padding-bottom: 96px;
}

.about-section-last {
    padding-bottom: 72px;
}

.about-split {
    display: grid;
    grid-template-columns: minmax(250px, 0.72fr) minmax(0, 1.28fr);
    gap: clamp(42px, 8vw, 110px);
    padding: 58px 0 64px;
}

.about-heading-block h3,
.topic-card h3,
.profile-card h3,
.direction-card h3 {
    margin: 0;
    font-size: clamp(2rem, 4.8vw, 4.2rem);
    font-weight: 650;
    letter-spacing: -0.055em;
    line-height: 1;
}

.about-prose {
    max-width: 660px;
}

.about-prose p,
.profile-copy > p,
.direction-copy > p {
    margin: 0;
    color: var(--muted);
    font-size: clamp(1rem, 1.5vw, 1.14rem);
    line-height: 1.78;
}

.about-prose p + p,
.profile-copy > p + p {
    margin-top: 22px;
}

.principle-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.principle-card {
    min-height: 250px;
    padding: 26px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.34);
}

.principle-card > span {
    display: inline-block;
    margin-bottom: 58px;
    color: var(--teal-dark);
    font-family:
        ui-monospace,
        SFMono-Regular,
        Menlo,
        monospace;
    font-size: 0.72rem;
}

.principle-card h4 {
    margin: 0;
    font-size: 1rem;
    letter-spacing: -0.02em;
}

.principle-card p {
    margin: 12px 0 0;
    color: var(--muted);
    font-size: 0.88rem;
    line-height: 1.65;
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 34px;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
}

.topic-card {
    min-height: 320px;
    padding: clamp(28px, 4vw, 48px);
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.42);
}

.topic-card h3 {
    max-width: 470px;
    font-size: clamp(2rem, 4.2vw, 3.6rem);
}

.topic-card > p:last-child {
    max-width: 500px;
    margin: 26px 0 0;
    color: var(--muted);
    font-size: 0.96rem;
    line-height: 1.7;
}

.profile-card {
    display: grid;
    grid-template-columns: minmax(260px, 0.82fr) minmax(0, 1.18fr);
    gap: clamp(42px, 8vw, 100px);
    margin-top: 34px;
    padding: clamp(34px, 6vw, 72px);
    border: 1px solid var(--line);
    border-radius: 14px;
    background:
        radial-gradient(
            circle at 12% 18%,
            rgba(255, 255, 255, 0.84),
            transparent 35%
        ),
        var(--teal-soft);
    box-shadow: var(--shadow);
}

.profile-introduction {
    align-self: start;
}

.profile-lead {
    margin: 28px 0 0;
    color: var(--teal-dark);
    font-size: clamp(1.05rem, 1.7vw, 1.25rem);
    font-weight: 600;
    line-height: 1.6;
}

.profile-copy {
    max-width: 650px;
}

.profile-details {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    margin: 42px 0 0;
    padding-top: 24px;
    border-top: 1px solid rgba(23, 33, 31, 0.18);
}

.profile-details div {
    display: grid;
    gap: 7px;
}

.profile-details dt {
    color: var(--teal-dark);
    font-size: 0.68rem;
    font-weight: 750;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.profile-details dd {
    margin: 0;
    font-size: 0.86rem;
    font-weight: 650;
    line-height: 1.5;
}

.direction-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(280px, 0.72fr);
    gap: clamp(42px, 8vw, 100px);
    margin-top: 34px;
    padding: clamp(34px, 6vw, 72px);
    border-radius: 14px;
    color: #ffffff;
    background:
        radial-gradient(
            circle at 86% 15%,
            rgba(255, 255, 255, 0.13),
            transparent 34%
        ),
        var(--ink);
    box-shadow: var(--shadow);
}

.direction-card .project-label {
    color: rgba(255, 255, 255, 0.62);
}

.direction-card h3 {
    max-width: 620px;
}

.direction-copy {
    align-self: end;
}

.direction-copy > p {
    color: rgba(255, 255, 255, 0.68);
}

.direction-card .primary-action {
    margin-top: 30px;
    color: var(--ink);
    background: #ffffff;
}

.direction-card .primary-action:hover {
    color: #ffffff;
    background: var(--teal-dark);
}

footer a {
    text-decoration: none;
}

footer a:hover {
    color: var(--teal-dark);
}

footer a[aria-current="page"] {
    color: var(--ink);
    font-weight: 700;
}

@media (max-width: 900px) {
    .principle-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .profile-details {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 760px) {
    .page-return {
        font-size: 0.66rem;
    }

    .about-hero {
        padding: 82px 0 96px;
    }

    .about-section {
        padding-bottom: 72px;
    }

    .about-split,
    .profile-card,
    .direction-card {
        grid-template-columns: 1fr;
        gap: 34px;
    }

    .about-split {
        padding: 42px 0 48px;
    }

    .principle-grid,
    .topic-grid {
        grid-template-columns: 1fr;
    }

    .principle-card,
    .topic-card {
        min-height: auto;
    }

    .principle-card > span {
        margin-bottom: 34px;
    }

    .profile-card,
    .direction-card {
        padding: 28px;
    }
}