/* blueprint for the individual pages; target res is 1920x1080 */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400&family=Geist:wght@300;400;500;600&family=JetBrains+Mono:wght@300;400;500&display=swap');


/* -----TOKENS----- */

:root {
    --bp-bg: #0d2645;
    --bp-bg-deep: #081a30;
    --bp-line: rgba(180, 215, 255, 0.08);
    --bp-line-strong: rgba(180, 215, 255, 0.18);
    --bp-grid-line: rgba(180, 215, 255, 0.08);
    --bp-grid-line-strong: rgba(180, 215, 255, 0.18);
    --bp-ink: #e8f1ff;
    --bp-ink-dim: rgba(232, 241, 255, 0.55);
    --bp-ink-faint: rgba(232, 241, 255, 0.35);
    --bp-accent: #6db4ff;

    --img-filter: none;
    --bp-divider-width: 1px;
    --bp-grid-fine: 20px;
    --bp-grid-heavy: 100px;

    --side-padding: 280px;

    --font-display: 'Cormorant Garamond', Georgia, serif;
    --font-body: 'Geist', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

:root[data-theme="light"] {
    --bp-bg: #f4ede0;
    --bp-bg-deep: #ebe2d0;
    --bp-line: rgba(42, 77, 122, 0.14);
    --bp-line-strong: rgba(42, 77, 122, 0.35);
    --bp-grid-line: rgba(42, 77, 122, 0.06);
    --bp-grid-line-strong: rgba(42, 77, 122, 0.08);
    --bp-ink: #1a1f2e;
    --bp-ink-dim: rgba(26, 31, 46, 0.62);
    --bp-ink-faint: rgba(26, 31, 46, 0.4);
    --bp-accent: #1a1f2e;


    --img-filter: saturate(0.85) brightness(0.97);
    --bp-divider-width: 2px;

    --bp-grid-fine: 32px;
    --bp-grid-heavy: 32px;
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --bp-bg: #f4ede0;
        --bp-bg-deep: #ebe2d0;
        --bp-line: rgba(42, 77, 122, 0.14);
        --bp-line-strong: rgba(42, 77, 122, 0.35);

        --bp-grid-line: rgba(42, 77, 122, 0.06);
        --bp-grid-line-strong: rgba(42, 77, 122, 0.10);

        --bp-ink: #1a1f2e;
        --bp-ink-dim: rgba(26, 31, 46, 0.62);
        --bp-ink-faint: rgba(26, 31, 46, 0.4);
        --bp-accent: #1a1f2e;
        --img-filter: saturate(0.85) brightness(0.97);
        --bp-divider-width: 2px;
        --bp-grid-fine: 32px;
        --bp-grid-heavy: 32px;
    }
}

:root,
body,
.navbar,
.main-header,
.projects-button,
.work-button,
.about-button {
    transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
}

body {
    color: var(--bp-ink);
    background-color: var(--bp-bg);
    font-family: var(--font-body);
    font-weight: 300;
    overflow-x: hidden;
    min-height: 100vh;

    background-image:
        linear-gradient(var(--bp-grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--bp-grid-line) 1px, transparent 1px),
        linear-gradient(var(--bp-grid-line-strong) 1px, transparent 1px),
        linear-gradient(90deg, var(--bp-grid-line-strong) 1px, transparent 1px);
    background-size:
        var(--bp-grid-fine) var(--bp-grid-fine),
        var(--bp-grid-fine) var(--bp-grid-fine),
        var(--bp-grid-heavy) var(--bp-grid-heavy),
        var(--bp-grid-heavy) var(--bp-grid-heavy);
    background-position: -1px -1px, -1px -1px, -1px -1px, -1px -1px;
    background-attachment: fixed;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 32px var(--side-padding);
    border-bottom: var(--bp-divider-width) solid var(--bp-line-strong);
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    position: relative;
    z-index: 10;
}

.navbar-left a {
    color: var(--bp-ink);
    font-weight: 500;
    letter-spacing: 0.18em;
    text-decoration: none;
    transition: color 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 18px;
}

.navbar-left a::after {
    content: 'REV. 03';
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.2em;
    color: var(--bp-accent);
    border: 1px solid var(--bp-accent);
    padding: 5px 12px;
    line-height: 1;
}

.navbar-left a:hover {
    color: var(--bp-accent);
}

.navbar-right {
    display: flex;
    gap: 40px;
}

.navbar-right a {
    color: var(--bp-ink);
    text-decoration: none;
    font-weight: 500;
    letter-spacing: 0.18em;
    transition: color 0.2s;
}

.navbar-right a:hover {
    color: var(--bp-accent);
}

.navbar-right a.active,
.navbar-left a.active {
    color: var(--bp-ink-dim);
    pointer-events: none;
}

.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    margin-left: 0;
    padding: 0;
    border: 1px solid transparent;
    background: transparent;
    cursor: pointer;
    color: var(--bp-ink);
    transition: border-color 0.25s, background-color 0.25s;
    /* vertical-align: middle; */
        margin-top: -6px;
}

.theme-toggle:hover {
    border-color: var(--bp-accent);
    background-color: rgba(109, 180, 255, 0.06);
}

.theme-toggle img {
    width: 16px;
    height: 16px;
    object-fit: contain;
    filter: invert(1) brightness(1);
    opacity: 0.9;
    transition: opacity 0.2s, filter 0.2s;
}

:root[data-theme="light"] .theme-toggle img {
    filter: none;
    opacity: 0.85;
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) .theme-toggle img {
        filter: none;
        opacity: 0.85;
    }
}

.theme-toggle .icon-light { display: none; }
.theme-toggle .icon-dark { display: block; }

:root[data-theme="light"] .theme-toggle .icon-light { display: block; }
:root[data-theme="light"] .theme-toggle .icon-dark { display: none; }

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) .theme-toggle .icon-light { display: block; }
    :root:not([data-theme]) .theme-toggle .icon-dark { display: none; }
}


.project-page-container {
    display: grid;
    grid-template-columns: 1fr 280px;
    column-gap: 100px;
    max-width: 1800px;
    margin: 0 auto;              
    padding: 100px var(--side-padding) 140px;
    align-items: start;
}


#content {
    flex: none;
    max-width: 820px;
    margin: 0;
    min-width: 0;  /* prevents grid blowout */
    counter-reset: section-counter;
}

#content section {
    margin: 0 0 96px 0;
    padding: 0;
    counter-increment: section-counter;
    position: relative;
    scroll-margin-top: 100px;
}

#content section:last-child {
    margin-bottom: 0;
}

#content section#intro h1 {
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(48px, 5vw, 72px);
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--bp-ink);
    margin: 40px 0 32px 0;
    padding-top: 28px;
    position: relative;
}

#content section#intro h1::before {
    content: 'CASE STUDY · PROJECT BRIEF';
    position: absolute;
    top: 0;
    left: 0;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.22em;
    color: var(--bp-accent);
    text-transform: uppercase;
    font-weight: 500;
}


#content section h2 {
    font-family: var(--font-display);
    font-weight: 400;
    font-size: 44px;
    line-height: 1.1;
    letter-spacing: -0.01em;
    color: var(--bp-ink);
    margin: 0 0 32px 0;
    padding-top: 32px;
    border-top: var(--bp-divider-width) solid var(--bp-line-strong);
    position: relative;
}

#content section h2::before {
    content: '§ ' counter(section-counter, decimal-leading-zero);
    position: absolute;
    top: 32px;
    left: -88px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.22em;
    color: var(--bp-accent);
    text-transform: uppercase;
    font-weight: 500;
    line-height: 1.4;
}

/* Don't show the rule for the intro section's h1 — it's the page opening */
#content section#intro h2,
#content section#intro {
    /* placeholder so the intro stays clean */
}


#content p {
    font-size: 17px;
    line-height: 1.8;
    font-weight: 300;
    color: var(--bp-ink-read);
    margin: 0 0 24px 0;
}

#content section#intro p:first-of-type {
    font-size: 20px;
    line-height: 1.7;
    color: var(--bp-ink);
    font-weight: 300;
    margin-bottom: 32px;
}


#content ul {
    margin: 0 0 24px 0;
    padding: 0;
    list-style: none;
}

#content ul li {
    position: relative;
    padding-left: 28px;
    font-size: 17px;
    line-height: 1.8;
    font-weight: 300;
    color: var(--bp-ink-read);
    margin-bottom: 14px;
}

#content ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 16px;
    height: 1px;
    background-color: var(--bp-accent);
}

#content p > ul {
    display: block;
    padding-left: 28px;
    margin: 0 0 14px 0;
    font-size: 17px;
    line-height: 1.8;
    font-weight: 300;
    color: var(--bp-ink-read);
    position: relative;
}

#content p > ul::before {
    content: '';
    position: absolute;
    left: 0;
    top: 14px;
    width: 16px;
    height: 1px;
    background-color: var(--bp-accent);
}


.project-image-block {
    width: 100%;
    max-width: 100%;
    height: auto;
    display: block;
    margin: 40px 0 48px 0;
    padding: 10px;
    background-color: var(--bp-bg-deep);
    border: 1px solid var(--bp-line-strong);
    border-radius: 0;
    box-shadow: none;
    cursor: pointer;
    transition: border-color 0.3s, transform 0.3s;
    position: relative;
}

.project-image-block:hover {
    border-color: var(--bp-accent);
    filter: none;
    transform: none;
}

#content section#intro .project-image-block {
    margin-top: 0;
}


/* toc */

#toc {
    flex: none;
    width: auto;
    position: sticky;
    top: 120px;
    align-self: start;
    font-size: 14px;
    border: 1px solid var(--bp-line-strong);
    padding: 24px;
    counter-reset: toc-counter;
}

#toc h4 {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: 0.22em;
    color: var(--bp-accent);
    text-transform: uppercase;
    margin: 0 0 4px 0;
    padding: 0 0 14px 0;
    border-bottom: var(--bp-divider-width) solid var(--bp-line-strong);
}


#toc h4::after {
    content: 'Sheet index';
    display: block;
    font-size: 9px;
    letter-spacing: 0.2em;
    color: var(--bp-ink-faint);
    margin-top: 6px;
    text-transform: uppercase;
}

#toc ul {
    list-style: none;
    padding: 0;
    margin: 16px 0 0 0;
}

#toc li {
    counter-increment: toc-counter;
    margin-bottom: 2px;
}

#toc a {
    text-decoration: none;
    color: var(--bp-ink-dim);
    padding: 10px 12px 10px 44px;
    display: block;
    position: relative;
    border-radius: 0;
    font-family: var(--font-body);
    font-size: 13px;
    font-weight: 400;
    line-height: 1.4;
    transition: color 0.25s, background-color 0.25s;
}

#toc a::before {
    content: counter(toc-counter, decimal-leading-zero);
    position: absolute;
    left: 12px;
    top: 10px;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.15em;
    color: var(--bp-ink-faint);
    line-height: 1.7;
    transition: color 0.25s;
}

#toc a:hover {
    color: var(--bp-ink);
    background-color: rgba(109, 180, 255, 0.05);
}

#toc a:hover::before {
    color: var(--bp-accent);
}

#toc a.active {
    color: var(--bp-bg);
    background-color: var(--bp-accent);
}

#toc a.active::before {
    color: var(--bp-bg);
}


.image-lightbox-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(8, 26, 48, 0.92);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 40px;
}

.image-lightbox-overlay.active {
    visibility: visible;
    opacity: 1;
    cursor: pointer;
}

.image-lightbox-overlay img {
    max-width: 90%;
    max-height: 90%;
    border-radius: 0;
    border: 1px solid var(--bp-line-strong);
    padding: 12px;
    background-color: var(--bp-bg-deep);
    box-shadow: 0 0 40px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s;
}

@media (max-width: 1400px) {
    :root { --side-padding: 120px; }
    .project-page-container {
        grid-template-columns: 1fr 260px;
        column-gap: 64px;
    }
    #content section h2::before {
        left: -64px;
    }
}

@media (max-width: 1100px) {
    :root { --side-padding: 48px; }
    .project-page-container {
        grid-template-columns: 1fr;
    }
    #toc {
        position: static;
        order: -1;
        margin-bottom: 48px;
    }
    #content section h2::before {
        position: static;
        display: block;
        margin-bottom: 8px;
    }
}

.companion-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    margin: 40px 0 48px 0;
    padding: 20px 24px;
    border: 1px solid var(--bp-line-strong);
    text-decoration: none;
    position: relative;
    transition: border-color 0.3s, background-color 0.3s;
}

.companion-link::before {
    content: 'X-REF';
    position: absolute;
    top: -8px;
    left: 16px;
    background: var(--bp-bg);
    padding: 0 8px;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.22em;
    color: var(--bp-accent);
}

.companion-text {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.companion-tag {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--bp-accent);
}

.companion-title {
    font-family: var(--font-body);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.4;
    color: var(--bp-ink);
}

.companion-arrow {
    font-family: var(--font-body);
    font-size: 20px;
    color: var(--bp-accent);
    flex: 0 0 auto;
    transition: transform 0.25s;
}

.companion-link:hover {
    border-color: var(--bp-accent);
    background-color: rgba(109, 180, 255, 0.04);
}

.companion-link:hover .companion-arrow {
    transform: translateX(4px);
}

.project-video-block {
    width: 100%;
    margin: 40px 0 48px 0;
    padding: 10px;
    background-color: var(--bp-bg-deep);
    border: 1px solid var(--bp-line-strong);
    position: relative;
    aspect-ratio: 16 / 9;
}

.project-video-block iframe {
    width: 100%;
    height: 100%;
    display: block;
    border: 0;
}