.portfolio-page {
    background: #f8f9f7;
    color: var(--color-deep-black);
}

.skip-link {
    position: fixed;
    z-index: 100;
    top: 1rem;
    left: 1rem;
    padding: 0.75rem 1rem;
    background: var(--color-deep-black);
    color: #ffffff;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-decoration: none;
    text-transform: uppercase;
    transform: translateY(-200%);
}

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

.portfolio-header {
    position: sticky;
    z-index: 20;
    top: 0;
    min-height: 4.25rem;
    display: grid;
    grid-template-columns: 1fr;
    align-items: center;
    padding: 0 4vw;
    border-bottom: 1px solid rgba(26, 26, 26, 0.1);
    background: rgba(248, 249, 247, 0.92);
    backdrop-filter: blur(16px);
}

.portfolio-header a {
    color: inherit;
    text-decoration: none;
}

.portfolio-header__title {
    justify-self: start;
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 400;
    letter-spacing: -0.02em;
}

#portfolio-content {
    width: min(92vw, 90rem);
    margin: 0 auto;
}

.portfolio-hero {
    display: grid;
    gap: clamp(1.75rem, 4vw, 3.5rem);
    padding: clamp(3.5rem, 8vw, 7.5rem) 0 clamp(2.75rem, 5vw, 4.5rem);
    border-bottom: 1px solid var(--color-deep-black);
}

.portfolio-hero h1 {
    margin: 0;
    font-family: var(--font-serif);
    font-size: clamp(3rem, 7vw, 7rem);
    font-weight: 400;
    line-height: 0.9;
    letter-spacing: -0.055em;
}

.portfolio-hero__toc {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem clamp(1.25rem, 3vw, 3.25rem);
}

.portfolio-hero__toc a {
    color: rgba(26, 26, 26, 0.62);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.15em;
    text-decoration: none;
    text-transform: uppercase;
    transition: color 0.25s ease;
}

.portfolio-hero__toc a:hover,
.portfolio-hero__toc a:focus-visible {
    color: var(--color-racing-green);
}

.eyebrow,
.section-index {
    margin: 0;
    color: var(--color-racing-green);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.credential {
    display: grid;
    grid-template-columns: minmax(10rem, 0.3fr) minmax(0, 1fr);
    gap: clamp(2rem, 6vw, 7rem);
    padding: clamp(2.5rem, 5vw, 4.5rem) 0;
    border-top: 1px solid var(--color-deep-black);
    border-bottom: 1px solid rgba(26, 26, 26, 0.16);
}

.credential__body {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(15rem, 0.75fr);
    gap: clamp(2rem, 6vw, 6rem);
    align-items: end;
}

.credential h2 {
    max-width: 20ch;
    margin: 0.75rem 0 0;
    font-family: var(--font-serif);
    font-size: clamp(1.9rem, 3.5vw, 3.5rem);
    font-weight: 400;
    line-height: 1.08;
    letter-spacing: -0.03em;
}

.credential__body > p {
    margin: 0;
    color: rgba(26, 26, 26, 0.68);
    font-size: 0.9rem;
    line-height: 1.7;
}

.tile__meta {
    margin: 0;
    color: rgba(26, 26, 26, 0.5);
    font-size: 0.64rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.tile__meta span {
    margin: 0 0.35rem;
}

.portfolio-section {
    padding: clamp(6rem, 12vw, 11rem) 0 0;
    scroll-margin-top: 6rem;
}

.section-heading {
    margin-bottom: clamp(2rem, 4vw, 3.5rem);
}

.section-heading h2 {
    margin: 0;
    font-family: var(--font-serif);
    font-size: clamp(2.2rem, 4vw, 4rem);
    font-weight: 400;
    line-height: 1;
    letter-spacing: -0.035em;
}

.tile-grid {
    display: grid;
    gap: 1px;
    background: rgba(26, 26, 26, 0.14);
    border: 1px solid rgba(26, 26, 26, 0.14);
}

.tile-grid--research {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

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

.portfolio-tile {
    min-width: 0;
    display: flex;
    flex-direction: column;
    padding: clamp(1.5rem, 3vw, 2.75rem);
    background: #f8f9f7;
    transition: background 0.3s ease, transform 0.3s ease;
}

.portfolio-tile:hover {
    z-index: 1;
    background: #ffffff;
    box-shadow: 0 1.25rem 3rem rgba(22, 45, 32, 0.08);
    transform: translateY(-0.25rem);
}

.portfolio-tile--link {
    color: inherit;
    text-decoration: none;
}

.research-tile {
    cursor: pointer;
}

.research-tile:focus-visible {
    position: relative;
    z-index: 2;
    outline: 2px solid var(--color-racing-green);
    outline-offset: -2px;
}

.research-tile__visual {
    width: 100%;
    aspect-ratio: 16 / 9;
    margin: 0 0 1.35rem;
    display: grid;
    align-items: center;
    justify-items: center;
}

.research-tile__visual img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center center;
}

.research-tile__visual--ecoli {
    position: relative;
}

.research-tile__visual--ecoli point-cloud-figure {
    position: absolute;
    inset: 0;
    min-height: 0;
    pointer-events: none;
}

.portfolio-tile.research-tile h3 {
    margin-top: 0.15rem;
}

.research-tile__prompt {
    display: inline-flex;
    align-items: center;
    margin: 1.25rem 0 0;
    color: var(--color-racing-green);
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.research-tile__prompt svg {
    width: 0.9em;
    height: 0.9em;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 1.5;
    transition: transform 0.25s ease;
}

.research-tile:hover .research-tile__prompt svg {
    transform: translateX(0.18rem);
}

.tile__topline {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
    color: var(--color-racing-green);
    font-size: 0.58rem;
    font-weight: 500;
    letter-spacing: 0.13em;
    line-height: 1.5;
    text-transform: uppercase;
}

.tile__topline span:last-child {
    flex: none;
    color: rgba(26, 26, 26, 0.42);
}

.portfolio-tile h3 {
    margin: clamp(2rem, 4vw, 3.5rem) 0 0;
    font-family: var(--font-serif);
    font-size: clamp(1.5rem, 2.4vw, 2.25rem);
    font-weight: 400;
    line-height: 1.12;
    letter-spacing: -0.025em;
}

.tile__role,
.tile__venue {
    margin: 0.85rem 0 0;
    color: var(--color-racing-green);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    line-height: 1.5;
    text-transform: uppercase;
}

.tile__summary {
    margin: 1.25rem 0 0;
    color: rgba(26, 26, 26, 0.68);
    font-size: 0.86rem;
    line-height: 1.7;
}

.portfolio-tile ul {
    margin: 2rem 0 0;
    padding: 0;
    list-style: none;
}

.portfolio-tile li {
    position: relative;
    padding: 0.85rem 0 0.85rem 1rem;
    border-top: 1px solid rgba(26, 26, 26, 0.1);
    color: rgba(26, 26, 26, 0.67);
    font-size: 0.76rem;
    line-height: 1.65;
}

.portfolio-tile li::before {
    content: "";
    position: absolute;
    top: 1.25rem;
    left: 0;
    width: 0.25rem;
    height: 0.25rem;
    background: var(--color-racing-green);
    border-radius: 50%;
}

.tile__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: auto;
    padding-top: 2rem;
}

.tile__tags span {
    padding: 0.45rem 0.6rem;
    border: 1px solid rgba(0, 66, 37, 0.22);
    color: var(--color-racing-green);
    font-size: 0.55rem;
    font-weight: 500;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.portfolio-tile--feature {
    min-height: 42rem;
}

.portfolio-tile--compact {
    min-height: 23rem;
}

.portfolio-tile--compact h3 {
    margin-top: 3.5rem;
    font-size: clamp(1.35rem, 2.1vw, 2rem);
}

.portfolio-tile--compact > p:not(.tile__venue) {
    margin: 1.5rem 0 0;
    color: rgba(26, 26, 26, 0.62);
    font-size: 0.76rem;
    line-height: 1.7;
}

.portfolio-tile--compact .tile__venue {
    margin-top: auto;
    padding-top: 2rem;
}

.portfolio-section--awards {
    padding-bottom: clamp(3.5rem, 6vw, 5.5rem);
}

.credential--final {
    margin-bottom: clamp(5rem, 9vw, 8rem);
}

.research-modal {
    width: min(42rem, calc(100vw - 2.5rem));
    max-height: min(44rem, calc(100svh - 2.5rem));
    padding: clamp(2rem, 5vw, 4rem);
    overflow: auto;
    border: 1px solid rgba(26, 26, 26, 0.18);
    background: #f8f9f7;
    color: var(--color-deep-black);
    box-shadow: 0 1.5rem 5rem rgba(22, 45, 32, 0.18);
}

.research-modal::backdrop {
    background: rgba(15, 24, 19, 0.5);
    backdrop-filter: blur(3px);
}

.research-modal form {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.research-modal__close {
    width: 2.2rem;
    height: 2.2rem;
    border: 1px solid rgba(26, 26, 26, 0.18);
    border-radius: 50%;
    background: transparent;
    color: var(--color-deep-black);
    cursor: pointer;
    font-size: 1.35rem;
    line-height: 1;
}

.research-modal h2 {
    max-width: 18ch;
    margin: 1.5rem 0 0;
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3.3rem);
    font-weight: 400;
    line-height: 1.02;
    letter-spacing: -0.035em;
}

.research-modal__details {
    display: grid;
    gap: 1.1rem;
    margin: 2.25rem 0 0;
    padding: 0;
    list-style: none;
}

.research-modal__details li {
    position: relative;
    padding-left: 1.1rem;
    color: rgba(26, 26, 26, 0.72);
    font-size: 0.9rem;
    line-height: 1.65;
}

.research-modal__details li::before {
    content: "";
    position: absolute;
    top: 0.62rem;
    left: 0;
    width: 0.3rem;
    height: 0.3rem;
    border-radius: 50%;
    background: var(--color-racing-green);
}

.award-list {
    border-top: 1px solid var(--color-deep-black);
}

.award-list article {
    display: grid;
    grid-template-columns: minmax(7rem, 0.2fr) minmax(0, 0.8fr) minmax(16rem, 0.55fr);
    align-items: baseline;
    gap: clamp(1.5rem, 5vw, 6rem);
    padding: 2rem 0;
    border-bottom: 1px solid rgba(26, 26, 26, 0.16);
}

.award-list span {
    color: var(--color-racing-green);
    font-size: 0.62rem;
    font-weight: 500;
    letter-spacing: 0.13em;
    text-transform: uppercase;
}

.award-list h3 {
    margin: 0;
    font-family: var(--font-serif);
    font-size: clamp(1.3rem, 2.2vw, 2rem);
    font-weight: 400;
}

.award-list p {
    margin: 0;
    color: rgba(26, 26, 26, 0.58);
    font-size: 0.76rem;
    line-height: 1.65;
}

@media (max-width: 980px) {
    .credential {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .tile-grid--research {
        grid-template-columns: 1fr;
    }

    .portfolio-tile {
        min-height: 0;
    }
}

@media (min-width: 981px) {
    .research-tile__visual {
        height: clamp(10.75rem, 17vw, 15.7rem);
        aspect-ratio: auto;
    }

    .research-tile .tile__topline {
        min-height: 2.6rem;
    }
}

@media (max-width: 680px) {
    .portfolio-header {
        min-height: 3.85rem;
        padding: 0 1.25rem;
    }

    .portfolio-header__title {
        font-size: 1.05rem;
    }

    .portfolio-hero {
        padding-top: 3.25rem;
    }

    .portfolio-hero__toc {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem 1.25rem;
    }

    #portfolio-content {
        width: calc(100% - 2.5rem);
    }

    .credential__body,
    .tile-grid--projects,
    .tile-grid--output {
        grid-template-columns: 1fr;
    }

    .portfolio-section {
        padding-top: 6rem;
    }

    .portfolio-tile {
        padding: 1.5rem;
    }

    .research-modal {
        width: min(100% - 1.5rem, 42rem);
        max-height: calc(100svh - 1.5rem);
        padding: 2.25rem 1.5rem 1.75rem;
    }

    .portfolio-tile h3,
    .portfolio-tile--compact h3 {
        margin-top: 2.5rem;
    }

    .award-list article {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

}

@media (prefers-reduced-motion: reduce) {
    .portfolio-tile {
        transition: none;
    }
}