/* =========================================
   recycle.studio — Swiss Typographic Style
   Layered-depth, high-contrast, 12-column grid
   ========================================= */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --black: #000000;
    --white: #FFFFFF;
    --signal-red: #E63946;
    --grid-gray: #E0E0E0;
    --mid-gray: #808080;
    --off-white: #F5F5F5;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: clamp(15px, 1.4vw, 17px);
    line-height: 1.7;
    color: var(--black);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* --- Typography --- */
/* Helvetica serves as system fallback, honoring the Swiss International Typographic Style heritage */
h1, h2, h3, .section-title, .card-title, .chapter-title {
    font-family: 'Barlow Condensed', Helvetica, sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    line-height: 1.1;
}

.card-label, .section-number, .colophon-label, .chapter-number, .sub-number, .section-count {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.card-ref, .bib-num, .colophon-mono, .bib-entry, .card-status, .index-refs {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 12px;
}

/* --- Reveal animation base --- */
.reveal-section {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal-section.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   SECTION 1: Grid Manifesto Hero
   ========================================= */
#grid-manifesto {
    position: relative;
    width: 100%;
    height: 100vh;
    min-height: 600px;
    background-color: var(--white);
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Visible grid lines background */
.grid-lines {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 1200px;
    max-width: calc(100% - 48px);
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.grid-lines::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(
            to right,
            var(--grid-gray) 0,
            var(--grid-gray) 1px,
            transparent 1px,
            transparent calc((100% - 176px) / 12 + 16px)
        );
    opacity: 0.4;
}

.grid-lines::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        repeating-linear-gradient(
            to bottom,
            transparent 0,
            transparent calc(100% - 1px),
            var(--grid-gray) calc(100% - 1px),
            var(--grid-gray) 100%
        );
    background-size: 100% 120px;
    opacity: 0.2;
}

/* Floating 3D Icons */
.floating-icons {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
}

.icon-3d {
    position: absolute;
    transform-style: preserve-3d;
    perspective: 400px;
}

/* --- Cube icon --- */
.icon-cube {
    width: 80px;
    height: 80px;
    animation: floatCube 15s ease-in-out infinite;
}

.cube-face {
    position: absolute;
    border: 2px solid var(--black);
}

.cube-face--front {
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

.cube-face--back {
    width: 100%;
    height: 100%;
    top: -14px;
    left: 14px;
    opacity: 0.25;
}

.cube-face--top {
    width: 100%;
    height: 14px;
    top: -14px;
    left: 0;
    transform: skewX(-45deg);
    transform-origin: bottom left;
    border-bottom: none;
    opacity: 0.4;
}

.cube-face--right {
    width: 14px;
    height: 100%;
    top: -14px;
    right: -14px;
    transform: skewY(-45deg);
    transform-origin: bottom left;
    border-left: none;
    opacity: 0.4;
}

/* --- Arrows (recycle symbol) icon --- */
.icon-arrows {
    width: 80px;
    height: 80px;
    animation: spinArrows 15s linear infinite;
}

.arrow-segment {
    position: absolute;
    width: 2px;
    height: 35px;
    background: var(--black);
    top: 50%;
    left: 50%;
    transform-origin: center top;
}

.arrow-segment::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 8px solid var(--black);
}

.arrow-segment--1 {
    transform: translate(-50%, -50%) rotate(0deg) translateY(-5px);
}

.arrow-segment--2 {
    transform: translate(-50%, -50%) rotate(120deg) translateY(-5px);
}

.arrow-segment--3 {
    transform: translate(-50%, -50%) rotate(240deg) translateY(-5px);
}

/* --- Intersecting planes icon --- */
.icon-plane {
    width: 90px;
    height: 90px;
    animation: rotatePlane 15s linear infinite;
}

.plane-layer {
    position: absolute;
    border: 2px solid var(--black);
}

.plane-layer--1 {
    width: 70%;
    height: 70%;
    top: 5%;
    left: 5%;
}

.plane-layer--2 {
    width: 70%;
    height: 70%;
    bottom: 5%;
    right: 5%;
    border-color: var(--signal-red);
    opacity: 0.5;
}

/* Position each floating icon */
#icon-cube-1 {
    top: 12%;
    left: 8%;
    opacity: 0.12;
}

#icon-arrows-1 {
    top: 20%;
    right: 12%;
    opacity: 0.1;
    width: 64px;
    height: 64px;
}

#icon-plane-1 {
    bottom: 22%;
    left: 18%;
    opacity: 0.08;
    width: 100px;
    height: 100px;
}

#icon-cube-2 {
    bottom: 28%;
    right: 8%;
    opacity: 0.09;
    width: 55px;
    height: 55px;
}

#icon-arrows-2 {
    top: 55%;
    left: 50%;
    opacity: 0.06;
    width: 72px;
    height: 72px;
}

#icon-plane-2 {
    top: 8%;
    left: 45%;
    opacity: 0.05;
    width: 60px;
    height: 60px;
}

#icon-cube-3 {
    bottom: 10%;
    left: 42%;
    opacity: 0.07;
    width: 45px;
    height: 45px;
}

/* Keyframes for 3D icon rotations */
@keyframes floatCube {
    0%, 100% { transform: rotate(0deg) translate(0, 0); }
    25% { transform: rotate(3deg) translate(4px, -6px); }
    50% { transform: rotate(0deg) translate(0, -2px); }
    75% { transform: rotate(-3deg) translate(-4px, -6px); }
}

@keyframes spinArrows {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes rotatePlane {
    0% { transform: perspective(300px) rotateY(0deg) rotateX(5deg); }
    50% { transform: perspective(300px) rotateY(180deg) rotateX(-5deg); }
    100% { transform: perspective(300px) rotateY(360deg) rotateX(5deg); }
}

/* Manifesto content */
.manifesto-content {
    position: relative;
    z-index: 3;
    text-align: center;
    padding: 0 24px;
}

.wordmark {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: clamp(52px, 12vw, 180px);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--black);
    cursor: default;
    transition: transform 0.2s ease;
    will-change: transform;
    position: relative;
}

.wordmark::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 3px;
    background-color: var(--signal-red);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.wordmark:hover {
    transform: scale(1.02);
}

.wordmark:hover::after {
    transform: scaleX(1);
}

.manifesto-tagline {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: clamp(12px, 1.5vw, 18px);
    color: var(--mid-gray);
    margin-top: 16px;
}

.manifesto-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
    margin-top: 32px;
}

.meta-item {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 11px;
    color: var(--mid-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.meta-divider {
    width: 24px;
    height: 1px;
    background-color: var(--grid-gray);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 1;
    transition: opacity 0.4s ease;
}

.scroll-indicator.is-hidden {
    opacity: 0;
}

.scroll-label {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 400;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--mid-gray);
}

.scroll-line {
    width: 1px;
    height: 32px;
    background-color: var(--mid-gray);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.5); opacity: 0.4; }
}

/* =========================================
   SECTION 2: Project Showcase
   ========================================= */
#project-showcase {
    background-color: var(--black);
    color: var(--white);
    padding: 120px 0;
}

.section-header {
    max-width: 1200px;
    margin: 0 auto 64px;
    padding: 0 24px;
    display: flex;
    align-items: baseline;
    gap: 24px;
    border-bottom: 1px solid var(--mid-gray);
    padding-bottom: 24px;
}

.section-number {
    font-size: clamp(14px, 1.2vw, 16px);
    color: var(--signal-red);
}

.section-title {
    font-size: clamp(32px, 5vw, 80px);
}

.section-count {
    font-size: 12px;
    color: var(--mid-gray);
    margin-left: auto;
}

/* 12-column project grid */
.project-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.project-card {
    padding: 40px 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: transform 0.2s ease;
    cursor: default;
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    transform: scale(1.02);
}

.project-card[data-span="6"] {
    grid-column: span 6;
}

.project-card[data-span="4"] {
    grid-column: span 4;
}

/* Card number watermark */
.card-number {
    position: absolute;
    top: -10px;
    right: 16px;
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: 120px;
    line-height: 1;
    opacity: 0.04;
    pointer-events: none;
    text-transform: uppercase;
}

/* Light card (white on black section) */
.project-card--light {
    background-color: var(--white);
    color: var(--black);
}

.project-card--light .card-label {
    color: var(--mid-gray);
}

.project-card--light .card-ref {
    color: var(--mid-gray);
}

.project-card--light .card-number {
    color: var(--black);
}

/* Dark card (off-white on black section) */
.project-card--dark {
    background-color: var(--off-white);
    color: var(--black);
}

.project-card--dark .card-label {
    color: var(--mid-gray);
}

.project-card--dark .card-ref {
    color: var(--mid-gray);
}

.project-card--dark .card-number {
    color: var(--black);
}

/* Card icon — SVG */
.card-icon {
    width: 40px;
    height: 40px;
    margin-bottom: 4px;
}

.card-svg {
    width: 40px;
    height: 40px;
    color: var(--black);
}

.card-label {
    font-size: 12px;
    color: var(--mid-gray);
}

.card-title {
    font-size: clamp(20px, 2.5vw, 32px);
    color: inherit;
}

.card-desc {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    color: var(--mid-gray);
    font-size: clamp(13px, 1.2vw, 15px);
    line-height: 1.7;
}

.card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid var(--grid-gray);
}

.card-ref {
    font-size: 11px;
    color: var(--mid-gray);
}

.card-status {
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--signal-red);
}

/* =========================================
   SECTION: Process Methodology Strip
   ========================================= */
#process-strip {
    background-color: var(--white);
    border-top: 1px solid var(--grid-gray);
    border-bottom: 1px solid var(--grid-gray);
    padding: 48px 0;
}

.strip-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
}

.strip-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    min-width: 80px;
}

.strip-number {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 11px;
    color: var(--signal-red);
}

.strip-label {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: clamp(14px, 1.6vw, 20px);
    text-transform: uppercase;
    letter-spacing: 0.02em;
    color: var(--black);
}

.strip-arrow {
    width: 24px;
    height: 12px;
    color: var(--mid-gray);
    flex-shrink: 0;
}

.strip-arrow svg {
    width: 100%;
    height: 100%;
}

/* =========================================
   SECTION 3: Reference / Scholarly Section
   ========================================= */
#reference-section {
    background-color: var(--white);
    color: var(--black);
    padding: 120px 0;
}

#reference-section .section-header {
    border-bottom-color: var(--grid-gray);
}

#reference-section .section-number {
    color: var(--signal-red);
}

.reference-grid {
    display: grid;
    grid-template-columns: 7fr 3fr;
    gap: 64px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.reference-content {
    display: flex;
    flex-direction: column;
    gap: 64px;
}

.reference-chapter {
    border-left: 3px solid var(--black);
    padding-left: 32px;
}

.chapter-number {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 14px;
    color: var(--signal-red);
    margin-bottom: 8px;
}

.chapter-title {
    font-size: clamp(24px, 3vw, 40px);
    margin-bottom: 24px;
}

.chapter-body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: clamp(15px, 1.4vw, 17px);
    line-height: 1.7;
    color: var(--black);
    margin-bottom: 16px;
}

.sub-section {
    margin-top: 32px;
    padding-left: 24px;
    border-left: 1px solid var(--grid-gray);
    transition: border-left-color 0.2s ease;
}

.sub-section:hover {
    border-left-color: var(--signal-red);
}

.sub-number {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 12px;
    color: var(--mid-gray);
    margin-bottom: 4px;
    display: block;
}

.sub-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    font-size: clamp(16px, 2vw, 22px);
    margin-bottom: 16px;
}

/* Sidebar */
.reference-sidebar {
    display: flex;
    flex-direction: column;
    gap: 48px;
}

/* Bibliography */
.reference-bibliography {
    padding-top: 8px;
    border-top: 1px solid var(--grid-gray);
}

.bib-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.02em;
    font-size: 16px;
    margin-bottom: 24px;
    color: var(--black);
}

.bib-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.bib-entry {
    font-size: 13px;
    line-height: 1.6;
    color: var(--mid-gray);
    transition: color 0.2s ease;
}

.bib-entry:hover {
    color: var(--black);
}

.bib-num {
    color: var(--signal-red);
    margin-right: 8px;
}

/* Cross-Reference Index */
.reference-index {
    padding-top: 8px;
    border-top: 1px solid var(--grid-gray);
}

.index-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.index-entry {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
    padding-bottom: 10px;
    border-bottom: 1px dotted var(--grid-gray);
}

.index-term {
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 13px;
    color: var(--black);
}

.index-refs {
    font-size: 11px;
    color: var(--mid-gray);
    white-space: nowrap;
}

/* =========================================
   SECTION 4: Colophon Footer
   ========================================= */
#colophon {
    background-color: var(--black);
    color: var(--white);
    padding: 80px 0 48px;
}

.colophon-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.colophon-block {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.colophon-label {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 11px;
    color: var(--mid-gray);
}

.colophon-text {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: 14px;
    color: var(--white);
}

.colophon-divider {
    grid-column: 1 / -1;
    height: 1px;
    background-color: var(--mid-gray);
    margin: 24px 0;
    opacity: 0.3;
}

.colophon-bottom {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.colophon-mono {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--mid-gray);
}

.colophon-mono--right {
    text-align: right;
}

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 1024px) {
    .project-card[data-span="6"] {
        grid-column: span 6;
    }

    .project-card[data-span="4"] {
        grid-column: span 6;
    }
}

@media (max-width: 768px) {
    .project-card[data-span="6"],
    .project-card[data-span="4"] {
        grid-column: span 12;
    }

    .reference-grid {
        grid-template-columns: 1fr;
    }

    .colophon-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .strip-inner {
        flex-wrap: wrap;
        gap: 16px;
    }

    .strip-arrow {
        display: none;
    }

    .strip-step {
        min-width: 60px;
    }

    .manifesto-meta {
        flex-wrap: wrap;
    }

    .colophon-bottom {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}

@media (max-width: 600px) {
    .project-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .project-card[data-span="6"],
    .project-card[data-span="4"] {
        grid-column: span 1;
    }

    .colophon-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        gap: 8px;
    }

    .section-count {
        margin-left: 0;
    }

    #project-showcase {
        padding: 80px 0;
    }

    #reference-section {
        padding: 80px 0;
    }

    .card-number {
        font-size: 80px;
    }
}