/* ==========================================================================
   CASE STUDY PAGE STYLES — Cathy Dolle ARD Inspired
   ========================================================================== */

/* --- CSS Variables --- */
:root {
    --cs-col-width: 7.73vw;
    --cs-gutter: 0.56vw;
    --cs-font: 'Inter', sans-serif;
    --cs-text-size: 11px;
    --cs-text-color: #000;
    --cs-bg: #fff;
    --cs-transition: cubic-bezier(0.165, 0.84, 0.44, 1);
}

/* --- Base Reset for Case Study Pages --- */
body.casestudy-page {
    font-family: var(--cs-font);
    background-color: var(--cs-bg);
    color: var(--cs-text-color);
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1.4;
}

body.casestudy-page * {
    box-sizing: border-box;
}

body.casestudy-page a {
    text-decoration: none;
    color: inherit;
}

/* --- Fixed Header --- */
.cs-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    z-index: 100;
    padding: 1.5rem;
    pointer-events: none;
}

.cs-header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    pointer-events: auto;
}

.cs-header-logo {
    text-decoration: none;
    color: var(--cs-text-color);
}

.cs-header-logo h1 {
    font-family: var(--cs-font);
    font-size: var(--cs-text-size);
    font-weight: 500;
    margin: 0;
    letter-spacing: 0;
}

.cs-header-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.cs-header-nav a {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    transition: opacity 0.3s ease;
}

.cs-header-nav a:hover {
    opacity: 0.5;
}

/* --- Main Content Wrapper --- */
.cs-main {
    width: 100%;
    background-color: var(--cs-bg);
}

/* --- Project Info Section --- */
.cs-project-info {
    padding: 12vh 1.5rem 6vh;
    max-width: 100%;
}

.cs-project-info-inner {
    display: flex;
    gap: var(--cs-gutter);
    font-size: var(--cs-text-size);
    line-height: 1.4;
    color: var(--cs-text-color);
    flex-wrap: wrap;
    max-width: calc(var(--cs-col-width) * 7 + var(--cs-gutter) * 6);
    margin-left: calc(var(--cs-col-width) * 2 + var(--cs-gutter) * 2);
}

.cs-info-left {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: calc(var(--cs-col-width) * 4 + var(--cs-gutter) * 3);
    flex-shrink: 0;
}

.cs-project-title {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    margin: 0;
    letter-spacing: 0;
}

.cs-project-desc {
    opacity: 0.6;
    font-weight: 400;
    font-size: var(--cs-text-size);
    line-height: 1.5;
    max-width: calc(var(--cs-col-width) * 2 + var(--cs-gutter));
    margin: 0;
}

.cs-info-center {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: calc(var(--cs-col-width) * 2 + var(--cs-gutter));
    flex-shrink: 0;
}

.cs-roles-title {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    margin: 0;
}

.cs-roles-list {
    list-style: none;
    padding: 0;
    margin: 0;
    opacity: 0.6;
    font-weight: 400;
    text-transform: uppercase;
    font-size: var(--cs-text-size);
}

.cs-roles-list li {
    line-height: 1.6;
}

.cs-info-right {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    flex-shrink: 0;
}

.cs-project-link {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    text-decoration: underline;
    text-underline-offset: 2px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: opacity 0.3s ease;
}

.cs-project-link:hover {
    opacity: 0.5;
}

.cs-project-link svg {
    width: 15px;
    height: 15px;
}

/* --- Media Gallery --- */
.cs-gallery {
    display: flex;
    flex-direction: column;
    gap: var(--cs-gutter);
    padding: 0 1.5rem;
    max-width: calc(var(--cs-col-width) * 7 + var(--cs-gutter) * 6);
    margin-left: calc(var(--cs-col-width) * 2 + var(--cs-gutter) * 2);
    padding-bottom: 15vh;
}

/* Gallery Row — the container for each media row */
.cs-gallery-row {
    width: 100%;
    overflow: hidden;
    position: relative;
}

/* Full-width image */
.cs-gallery-row.full-width {
    width: 100%;
}

.cs-gallery-row.full-width img {
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
}

/* Panoramic image — wider aspect ratio */
.cs-gallery-row.panoramic img {
    width: 100%;
    height: auto;
    aspect-ratio: 2 / 1;
    object-fit: cover;
    display: block;
}

/* Side-by-side pair */
.cs-gallery-row.pair {
    display: flex;
    gap: var(--cs-gutter);
    overflow: visible;
}

.cs-gallery-row.pair img {
    width: calc(50% - var(--cs-gutter) / 2);
    aspect-ratio: 11 / 16;
    object-fit: cover;
    display: block;
    flex-shrink: 0;
}

/* Pair aligned to end (right-aligned pair) */
.cs-gallery-row.pair.align-end {
    justify-content: flex-end;
}

/* Pair aligned to start (left-aligned pair) */
.cs-gallery-row.pair.align-start {
    justify-content: flex-start;
}

/* Single portrait — centered */
.cs-gallery-row.portrait-single {
    display: flex;
    justify-content: center;
}

.cs-gallery-row.portrait-single img {
    width: 50%;
    aspect-ratio: 11 / 16;
    object-fit: cover;
    display: block;
}

/* Vertical spacing between gallery groups */
.cs-gallery-spacer {
    height: 8vh;
}

/* Image reveal animation */
.cs-gallery-row img,
.cs-gallery-row.pair img {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s var(--cs-transition), transform 0.8s var(--cs-transition);
}

.cs-gallery-row img.revealed,
.cs-gallery-row.pair img.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Image hover effect */
.cs-gallery-row img {
    cursor: default;
    transition: opacity 0.8s var(--cs-transition), transform 0.8s var(--cs-transition);
}

/* --- Fixed Sidebar Thumbnail Nav (Scroll-Spy) --- */
.cs-sidebar {
    position: fixed;
    right: 1.5rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 90;
    display: flex;
    flex-direction: column;
    gap: var(--cs-gutter);
    align-items: center;
    width: calc(var(--cs-col-width) * 1);
}

.cs-sidebar-inner {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: var(--cs-gutter);
    position: relative;
    transform: scale(0.6);
    transform-origin: center;
}

/* Active indicator border */
.cs-sidebar-active-border {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    border: 1px solid var(--cs-text-color);
    pointer-events: none;
    z-index: 50;
    transition: top 0.4s var(--cs-transition), height 0.4s var(--cs-transition);
    transform: scale(1.1);
}

/* Thumbnail items */
.cs-thumb {
    width: 100%;
    overflow: hidden;
    cursor: pointer;
    transition: opacity 0.3s ease;
    opacity: 0.4;
}

.cs-thumb.active {
    opacity: 1;
}

.cs-thumb:hover {
    opacity: 0.8;
}

.cs-thumb img {
    width: 100%;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    display: block;
}

/* Thumb pair (side-by-side thumbnail) */
.cs-thumb.thumb-pair {
    display: flex;
    gap: 2px;
    aspect-ratio: 16 / 9;
}

.cs-thumb.thumb-pair img {
    width: calc(50% - 1px);
    height: 100%;
    aspect-ratio: auto;
    object-fit: cover;
}

/* --- Fixed Footer --- */
.cs-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100vw;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    z-index: 100;
    font-size: var(--cs-text-size);
    font-weight: 500;
    pointer-events: none;
}

.cs-footer > * {
    pointer-events: auto;
}

.cs-scroll-percent {
    font-size: var(--cs-text-size);
    font-weight: 500;
    line-height: 1;
}

.cs-footer-contact {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    text-decoration: none;
    color: var(--cs-text-color);
    transition: opacity 0.3s ease;
}

.cs-footer-contact:hover {
    text-decoration: underline;
    opacity: 0.6;
}

/* --- Lightbox Overlay --- */
.cs-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.92);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.4s ease;
    cursor: pointer;
}

.cs-lightbox.open {
    opacity: 1;
    pointer-events: auto;
}

.cs-lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
}

/* --- Scroll Up Indicator (Top) --- */
.cs-scroll-up-indicator {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    height: 12vh;
    pointer-events: none;
}

.cs-scroll-up-label {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--cs-text-color);
    margin-left: calc(var(--cs-col-width) * 2 + var(--cs-gutter) * 2);
}

/* --- Scroll Down Indicator (Bottom Progress Bar) --- */
.cs-scroll-indicator {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 95;
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    height: 15vh;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.cs-scroll-indicator.visible {
    opacity: 1;
}

.cs-scroll-indicator-inner {
    display: flex;
    align-items: center;
    gap: 1rem;
    max-width: calc(var(--cs-col-width) * 7 + var(--cs-gutter) * 6);
    margin-left: calc(var(--cs-col-width) * 2 + var(--cs-gutter) * 2);
    width: 100%;
}

.cs-scroll-label {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    white-space: nowrap;
    color: var(--cs-text-color);
    min-width: calc(var(--cs-col-width) * 1.5);
    padding-right: 1rem;
}

.cs-scroll-bar {
    flex: 1;
    height: 2px;
    background: rgba(0, 0, 0, 0.15);
    position: relative;
    overflow: hidden;
}

.cs-scroll-bar-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0%;
    background: var(--cs-text-color);
    transition: width 0.15s linear;
}

/* --- Contact Page Specifics --- */
.cs-contact-wrap {
    padding: 15vh 1.5rem 10vh;
    max-width: 100%;
}

.cs-contact-inner {
    display: flex;
    gap: calc(var(--cs-gutter) * 4);
    max-width: calc(var(--cs-col-width) * 7 + var(--cs-gutter) * 6);
    margin-left: calc(var(--cs-col-width) * 2 + var(--cs-gutter) * 2);
}

.cs-contact-info {
    width: calc(var(--cs-col-width) * 3 + var(--cs-gutter) * 2);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.cs-contact-title {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    margin: 0;
    letter-spacing: 0;
}

.cs-contact-desc {
    opacity: 0.6;
    font-weight: 400;
    font-size: var(--cs-text-size);
    line-height: 1.6;
    margin: 0;
    max-width: 90%;
}

.cs-contact-details {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1rem;
}

.cs-detail-block {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.cs-detail-label {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    opacity: 0.4;
}

.cs-detail-link,
.cs-detail-text {
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    text-decoration: none;
    line-height: 1.5;
    transition: opacity 0.3s ease;
}

.cs-detail-link:hover {
    opacity: 0.5;
}

.cs-contact-form-col {
    flex-grow: 1;
}

.cs-minimal-form {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.cs-form-row {
    display: flex;
    gap: calc(var(--cs-gutter) * 2);
}

.cs-form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    position: relative;
}

.cs-form-group.half {
    width: calc(50% - var(--cs-gutter));
}

.cs-minimal-form label {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.5;
    pointer-events: none;
}

.cs-minimal-form input,
.cs-minimal-form select,
.cs-minimal-form textarea {
    background: transparent;
    border: none;
    border-bottom: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: 0;
    padding: 0.5rem 0;
    font-family: var(--cs-font);
    font-size: 13px;
    color: var(--cs-text-color);
    outline: none;
    transition: border-color 0.3s ease;
    resize: none;
}

.cs-minimal-form input:focus,
.cs-minimal-form select:focus,
.cs-minimal-form textarea:focus {
    border-bottom-color: rgba(0, 0, 0, 1);
}

.cs-minimal-form select {
    appearance: none;
    cursor: pointer;
    background-image: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="10" height="10" viewBox="0 0 24 24" fill="none" stroke="black" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><polyline points="6 9 12 15 18 9"></polyline></svg>');
    background-repeat: no-repeat;
    background-position: right center;
}

.cs-submit-btn {
    align-self: flex-start;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--cs-text-color);
    padding: 0.2rem 0;
    font-family: var(--cs-font);
    font-size: var(--cs-text-size);
    font-weight: 500;
    text-transform: uppercase;
    cursor: pointer;
    color: var(--cs-text-color);
    margin-top: 1rem;
    transition: opacity 0.3s ease;
}

.cs-submit-btn:hover {
    opacity: 0.5;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .cs-sidebar {
        display: none;
    }

    .cs-project-info-inner {
        margin-left: 0;
        max-width: 100%;
    }

    .cs-gallery {
        margin-left: 0;
        max-width: 100%;
    }

    .cs-scroll-indicator-inner {
        margin-left: 0;
    }

    .cs-contact-inner {
        margin-left: 0;
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    .cs-project-info {
        padding: 12vh 1.5rem 4vh;
    }

    .cs-project-info-inner {
        flex-direction: column;
        gap: 2.5rem;
    }

    .cs-info-left {
        width: 100%;
    }

    .cs-project-desc {
        max-width: 80%;
    }

    .cs-info-center {
        width: 100%;
    }

    .cs-info-right {
        width: 100%;
    }

    .cs-gallery {
        padding: 0 1.5rem;
        padding-bottom: 10vh;
    }

    .cs-gallery-row.pair {
        flex-direction: column;
    }

    .cs-gallery-row.pair img {
        width: 100%;
    }

    .cs-gallery-row.portrait-single img {
        width: 100%;
    }

    .cs-header {
        padding: 1rem;
    }

    .cs-footer {
        padding: 1rem;
    }

    .cs-header-nav {
        gap: 1rem;
    }

    .cs-contact-inner {
        flex-direction: column;
        gap: 4rem;
    }

    .cs-contact-info {
        width: 100%;
    }

    .cs-form-row {
        flex-direction: column;
        gap: 2.5rem;
    }

    .cs-form-group.half {
        width: 100%;
    }
}