body { background: #e0dfda; }

.header.solid { background: #e0dfda; }

/* =========================================================
   GRID PAGE
   ========================================================= */

.category-page {
    padding: 18vh 8vw 12vh;
}

.category-head {
    max-width: 700px;
    margin-bottom: 5rem;
}

.category-head h1 {
    font-family: 'Cinzel', serif;
    font-size: clamp(2rem, 4vw, 3rem);
    letter-spacing: 0.3rem;
}

.category-head p {
    margin-top: 0.8rem;
    font-size: 0.95rem;
    opacity: 0.7;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 4rem 3rem;
}

.project-card {
    color: #111;
    cursor: pointer;
    outline: none;
}

.card-frame {
    position: relative;
    overflow: hidden;
}

/* grey fallback shows until the image is added */
.card-image {
    aspect-ratio: 4 / 3;
    background-color: #c9c8c2;
    background-size: cover;
    background-position: center;
    filter: grayscale(10%);
    transition: transform 0.8s ease, filter 0.8s ease;
}

.project-card:hover .card-image,
.project-card:focus-visible .card-image {
    transform: scale(1.04);
    filter: grayscale(0%);
}

.card-tag {
    position: absolute;
    top: 1rem;
    left: 1rem;
    padding: 0.35rem 0.8rem;
    background: rgba(17, 17, 17, 0.75);
    color: #e0dfda;
    font-size: 0.65rem;
    letter-spacing: 0.15rem;
    text-transform: uppercase;
}

.card-open {
    position: absolute;
    right: 1rem;
    bottom: 1rem;
    color: #fff;
    font-size: 0.75rem;
    letter-spacing: 0.15rem;
    text-transform: uppercase;
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.project-card:hover .card-open {
    opacity: 1;
    transform: translateY(0);
}

.card-num {
    position: absolute;
    right: 1.2rem;
    top: 0.8rem;
    font-family: 'Cinzel', serif;
    font-size: 2.4rem;
    color: rgba(17, 17, 17, 0.18);
}

.card-info { margin-top: 1.2rem; }

.card-info h2 {
    font-family: 'Cinzel', serif;
    font-size: 1.25rem;
    letter-spacing: 0.15rem;
}

.card-meta {
    margin-top: 0.3rem;
    font-size: 0.8rem;
    letter-spacing: 0.05rem;
    opacity: 0.6;
}

.card-line {
    margin-top: 0.8rem;
    font-size: 0.9rem;
    line-height: 1.6;
}

/* cards that are not ready yet */
.project-card.soon { cursor: default; }
.project-card.soon .card-image { filter: grayscale(100%); opacity: 0.55; }
.project-card.soon:hover .card-image { transform: none; }
.project-card.soon .card-info { opacity: 0.5; }


/* =========================================================
   RESEARCH OVERLAY  (cs = case study, same system as compcon)
   ========================================================= */

body.cs-open { overflow: hidden; }

.cs {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: #e0dfda;
    overflow-y: auto;
    overscroll-behavior: contain;
    transform: translateY(100%);
    transition: transform 0.7s cubic-bezier(0.77, 0, 0.18, 1);
    visibility: hidden;
}

.cs.open {
    transform: translateY(0);
    visibility: visible;
}

.cs-close {
    position: fixed;
    top: 1.6rem;
    right: 2rem;
    z-index: 10;
    width: 3rem;
    height: 3rem;
    border-radius: 50%;
    background: rgba(17, 17, 17, 0.55);
    backdrop-filter: blur(6px);
    border: none;
    padding: 0;
    cursor: pointer;
    transition: background 0.3s ease, transform 0.3s ease;
}

.cs-close:hover {
    background: #111;
    transform: rotate(90deg);
}

.cs-close span {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1.1rem;
    height: 1px;
    background: #fff;
}

.cs-close span:first-child { transform: translate(-50%, -50%) rotate(45deg); }
.cs-close span:last-child  { transform: translate(-50%, -50%) rotate(-45deg); }

.cs-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 2px;
    width: 0;
    background: #111;
    z-index: 11;
}

.cs-section { padding: 9vh 8vw; }

.cs-eyebrow {
    display: block;
    margin-bottom: 1rem;
    font-size: 0.7rem;
    letter-spacing: 0.25rem;
    text-transform: uppercase;
    opacity: 0.55;
}

.cs-section h3 {
    font-family: 'Cinzel', serif;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    letter-spacing: 0.15rem;
    line-height: 1.25;
    margin-bottom: 1.8rem;
}

.cs-section p {
    max-width: 640px;
    margin-bottom: 1.2rem;
    line-height: 1.75;
}

figure img {
    width: 100%;
    cursor: zoom-in;
}

figcaption {
    margin-top: 0.8rem;
    font-size: 0.75rem;
    letter-spacing: 0.05rem;
    opacity: 0.6;
}

.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.9s ease, transform 0.9s ease;
}

.reveal.in {
    opacity: 1;
    transform: none;
}


/* ---------- HERO ---------- */

.cs-hero {
    position: relative;
    height: 100vh;
    overflow: hidden;
    background: #1d2a30;   /* deep sea colour until the hero image is added */
}

.cs-hero-img {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    transform: scale(1.08);
    transition: transform 2.2s ease;
}

.cs.open .cs-hero-img { transform: scale(1); }

.cs-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.1) 45%, rgba(0,0,0,0) 70%);
}

.cs-hero-text {
    position: absolute;
    left: 8vw;
    right: 8vw;
    bottom: 10vh;
    z-index: 1;
    color: #fff;
}

.cs-hero-text .cs-eyebrow { opacity: 0.85; }

.cs-hero-text h2 {
    font-family: 'Cinzel', serif;
    font-size: clamp(3rem, 9vw, 8rem);
    letter-spacing: 0.5rem;
    line-height: 1;
}

.cs-hero-text p {
    margin-top: 1.2rem;
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-size: clamp(1rem, 1.6vw, 1.3rem);
    opacity: 0.9;
}

.cs-scroll {
    position: absolute;
    right: 8vw;
    bottom: 10vh;
    z-index: 1;
    color: #fff;
    font-size: 0.65rem;
    letter-spacing: 0.25rem;
    text-transform: uppercase;
    opacity: 0.8;
    writing-mode: vertical-rl;
}


/* ---------- FACTS ---------- */

.cs-facts {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0 3rem;
    padding: 8vh 8vw 0;
}

.cs-fact {
    border-top: 1px solid rgba(17,17,17,0.2);
    padding: 1.2rem 0 2rem;
}

.cs-fact span {
    display: block;
    font-size: 0.65rem;
    letter-spacing: 0.2rem;
    text-transform: uppercase;
    opacity: 0.55;
    margin-bottom: 0.4rem;
}

.cs-fact strong {
    font-weight: 400;
    font-size: 0.95rem;
}


/* ---------- LEAD ---------- */

.cs-lead p {
    max-width: 980px;
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-size: clamp(1.6rem, 3.2vw, 2.8rem);
    line-height: 1.35;
}


/* ---------- INTRO (heading left, text right) ---------- */

.cs-intro {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 6vw;
    align-items: start;
}

.cs-intro p { max-width: 860px; font-size: 1.05rem; }


/* ---------- DIAGRAM (inline svg) ---------- */

.cs-diagram svg {
    display: block;
    width: 100%;
    max-width: 1100px;
    height: auto;
    margin-top: 1rem;
}

.cs-diagram .note {
    margin-top: 1.4rem;
    font-size: 0.8rem;
    opacity: 0.6;
}


/* ---------- STEPS ---------- */

.cs-steps { list-style: none; max-width: 900px; }

.cs-steps li {
    display: grid;
    grid-template-columns: 4.5rem 1fr;
    gap: 1rem;
    padding: 1.6rem 0;
    border-top: 1px solid rgba(17,17,17,0.15);
}

.cs-steps li:last-child { border-bottom: 1px solid rgba(17,17,17,0.15); }

.cs-steps .num {
    font-family: 'Cinzel', serif;
    font-size: 1.6rem;
    opacity: 0.35;
    line-height: 1.2;
}

.cs-steps h4 {
    font-size: 1rem;
    font-weight: 500;
    letter-spacing: 0.05rem;
    margin-bottom: 0.4rem;
}

.cs-steps h4 small {
    margin-left: 0.6rem;
    font-size: 0.7rem;
    font-weight: 400;
    letter-spacing: 0.15rem;
    text-transform: uppercase;
    opacity: 0.5;
}

.cs-steps li p {
    margin: 0;
    font-size: 0.92rem;
    line-height: 1.65;
    opacity: 0.85;
}


/* ---------- CLOSING ---------- */

.cs-closing {
    padding: 16vh 8vw;
    text-align: center;
}

.cs-closing p {
    max-width: 900px;
    margin: 0 auto;
    font-family: 'Fraunces', serif;
    font-style: italic;
    font-size: clamp(1.6rem, 3.4vw, 3rem);
    line-height: 1.3;
}


/* ---------- FULL PAPER BUTTON ---------- */

.cs-paper {
    background: #111;
    color: #e0dfda;
    padding: 14vh 8vw;
}

.cs-paper .cs-eyebrow { opacity: 0.6; }

.cs-paper p {
    max-width: 640px;
    line-height: 1.75;
    opacity: 0.8;
}

.paper-btn {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    margin-top: 2.4rem;
    padding: 1.1rem 2rem;
    border: 1px solid rgba(224,223,218,0.5);
    color: #e0dfda;
    text-decoration: none;
    font-size: 0.8rem;
    letter-spacing: 0.2rem;
    text-transform: uppercase;
    transition: background 0.3s ease, color 0.3s ease;
}

.paper-btn:hover {
    background: #e0dfda;
    color: #111;
}

.paper-btn .arrow { transition: transform 0.3s ease; }
.paper-btn:hover .arrow { transform: translateX(4px); }


/* ---------- ROLE ---------- */

.cs-role {
    display: grid;
    grid-template-columns: 1fr 1.6fr;
    gap: 6vw;
    border-top: 1px solid rgba(17,17,17,0.2);
    margin: 0 8vw;
    padding: 10vh 0;
}

.cs-role h3 {
    font-family: 'Cinzel', serif;
    font-size: clamp(1.6rem, 3vw, 2.4rem);
    letter-spacing: 0.15rem;
}

.cs-role p {
    max-width: 640px;
    line-height: 1.75;
    margin-bottom: 2rem;
}

.cs-role ul { list-style: none; }

.cs-role li {
    padding: 0.9rem 0;
    border-bottom: 1px solid rgba(17,17,17,0.12);
    font-size: 0.95rem;
}

.cs-role li:first-child { padding-top: 0; }


/* ---------- LINKS ---------- */

.cs-links ul { list-style: none; max-width: 900px; }

.cs-links a {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 2rem;
    padding: 1.6rem 0;
    border-top: 1px solid rgba(17,17,17,0.2);
    color: #111;
    text-decoration: none;
    transition: padding 0.4s ease;
}

.cs-links li:last-child a { border-bottom: 1px solid rgba(17,17,17,0.2); }

.cs-links a:hover { padding-left: 1rem; }

.cs-links strong {
    font-weight: 400;
    font-size: 1.1rem;
}

.cs-links small {
    display: block;
    margin-top: 0.3rem;
    font-size: 0.8rem;
    opacity: 0.55;
}

.cs-links .arrow {
    font-size: 1.2rem;
    transition: transform 0.4s ease;
}

.cs-links a:hover .arrow { transform: translate(4px, -4px); }


/* ---------- NEXT ---------- */

.cs-next {
    display: block;
    width: 100%;
    background: #111;
    color: #e0dfda;
    border: none;
    border-top: 1px solid rgba(224,223,218,0.15);
    padding: 14vh 8vw;
    text-align: left;
    cursor: pointer;
    font-family: inherit;
}

.cs-next .cs-eyebrow { opacity: 0.6; }

.cs-next strong {
    display: block;
    font-family: 'Cinzel', serif;
    font-weight: 600;
    font-size: clamp(2rem, 6vw, 5rem);
    letter-spacing: 0.3rem;
    transition: letter-spacing 0.5s ease;
}

.cs-next:hover strong { letter-spacing: 0.45rem; }


/* =========================================================
   LIGHTBOX
   ========================================================= */

.lightbox {
    position: fixed;
    inset: 0;
    z-index: 3000;
    background: rgba(10, 10, 10, 0.94);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4vh 4vw;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
    cursor: zoom-out;
}

.lightbox.open {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 100%;
    max-height: 86vh;
    object-fit: contain;
}

.lightbox p {
    margin-top: 1rem;
    color: #e0dfda;
    font-size: 0.8rem;
    opacity: 0.7;
}


/* =========================================================
   RESPONSIVE
   ========================================================= */

@media (max-width: 900px) {

    .cs-facts { grid-template-columns: 1fr 1fr; }

    .cs-intro,
    .cs-role { grid-template-columns: 1fr; }

    .cs-scroll { display: none; }
}

@media (max-width: 600px) {

    .project-grid { grid-template-columns: 1fr; gap: 3rem; }

    .cs-facts { grid-template-columns: 1fr; }

    .cs-close { top: 1rem; right: 1rem; }

    .cs-hero-text h2 { letter-spacing: 0.25rem; }
}