:root {
    --u: 8px;
    --gutter: calc(var(--u) * 3); /* 24px */
    --cols: 12;
    
    --ink: #111111;
    --paper: #f4f2ee; /* warm off-white, never pure */
    --signal-red: #e4231f;

    background-color: var(--paper);
    color: var(--ink);
    font-family: 'Inter', sans-serif;
    font-size: 1.125rem; /* 18px base */
    line-height: calc(var(--u) * 4); /* 32px baseline */
}

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

body {
    position: relative;
    overflow-x: hidden;
    transition: background-color 0.4s ease, color 0.4s ease;
}

p {
    margin-bottom: calc(var(--u) * 2);
}

/* Background flood state on body when project hovered */
body.flood {
    background-color: var(--flood-color);
}

::selection {
    background-color: var(--signal-red);
    color: var(--paper);
}

a {
    color: inherit;
    text-decoration: none;
    outline: none;
}

a:focus-visible {
    outline: calc(var(--u) * 0.25) solid var(--signal-red);
    outline-offset: calc(var(--u) * 0.5);
}

/* Typography Constraints */
h1, h2, h3, h4, .display, .logo-massive, .say-hello {
    letter-spacing: -0.045em;
    font-weight: 500;
}

.caption, .meta-col, .f-col, .p-num, .p-desc, .p-year, .section-number, .intro-meta, .gread {
    font-size: 1.125rem;
    letter-spacing: 0.02em; /* loose for caption */
}

.p-num, .p-year, .section-number {
    font-variant-numeric: tabular-nums;
}

/* Invert colors on flood */
body.flood .section-title, body.flood .contact-divider {
    border-color: var(--paper);
    background-color: transparent;
}
body.flood h2 { border-color: var(--paper); }
body.flood { color: var(--paper); }

/* Layout Utilities - Grid System */
.container {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 calc(var(--u) * 6); /* 48px padding at edges */
    
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    gap: var(--gutter);
}

.container > * {
    grid-column: 1 / -1; /* default full span */
}

@media (max-width: 768px) {
    .container {
        padding: 0 calc(var(--u) * 3);
    }
}

.section-spacing {
    margin-bottom: calc(var(--u) * 8);
}

/* Top Bar */
.top-bar {
    margin-top: calc(var(--u) * 4);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}
.nav-links a {
    margin-left: calc(var(--u) * 4);
}
.nav-links a:hover {
    color: var(--signal-red);
}

/* Meta Block */
.meta-block {
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    gap: var(--gutter);
    border-bottom: 1px solid var(--ink);
    padding-bottom: calc(var(--u) * 6);
    align-items: start;
}
body.flood .meta-block {
    border-color: var(--paper);
}
.meta-col:nth-child(1) { grid-column: 1 / 4; }
.meta-col:nth-child(2) { grid-column: 4 / 7; }
.meta-col:nth-child(3) { grid-column: 7 / 10; }
.meta-col:nth-child(4) { grid-column: 10 / 13; text-align: right; }

/* Hero Block */
.hero-block {
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    gap: var(--gutter);
}
.logo-massive {
    grid-column: 1 / -1;
    font-size: clamp(4rem, 13.5vw, 13rem);
    line-height: 1;
    margin-bottom: calc(var(--u) * 4);
    position: relative;
    letter-spacing: -0.05em;
}
.logo-o-wrapper {
    position: relative;
    color: transparent;
}
.logo-o {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0.6em;
    height: 0.6em;
    background-color: var(--signal-red);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}
.intro-grid {
    grid-column: 4 / -1; /* starts on 4th col */
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: var(--gutter);
}
.intro-text {
    grid-column: 1 / 7;
    font-size: 2.25rem;
    line-height: calc(var(--u) * 5);
    letter-spacing: -0.045em;
    font-weight: 400;
    margin-bottom: calc(var(--u) * 2);
}
.section-intro {
    font-size: 1.125rem;
    line-height: calc(var(--u) * 5);
    font-weight: 400;
    letter-spacing: -0.02em;
    margin-bottom: calc(var(--u) * 3);
}
.section-subintro {
    font-size: 1.125rem;
    line-height: calc(var(--u) * 4);
    font-weight: 400;
    opacity: 0.9;
    margin-bottom: calc(var(--u) * 3);
}
.body-large {
    font-size: 1.125rem;
    line-height: calc(var(--u) * 4);
}
.intro-meta {
    grid-column: 7 / 10; /* span 3 cols */
    text-align: right;
}

/* Sections Structure */
.project-index, .the-studio, .capabilities, .footer {
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    gap: var(--gutter);
}

.section-number {
    grid-column: 1 / 3;
    font-size: 2.25rem;
    font-weight: 500;
    letter-spacing: -0.045em;
    padding-top: calc(var(--u) * 3);
}
.section-content {
    grid-column: 3 / -1;
    border-top: 1px solid var(--ink);
    padding-top: calc(var(--u) * 3);
}
body.flood .section-content {
    border-color: var(--paper);
}
.section-title {
    font-size: 2.25rem;
    font-weight: 500;
    margin-bottom: calc(var(--u) * 8);
}

/* Projects / Index Flood */
.project-list {
    display: flex;
    flex-direction: column;
}

.project-row {
    display: grid;
    grid-template-columns: 1fr 4fr 3fr 2fr;
    gap: var(--gutter);
    padding: calc(var(--u) * 2) 0;
    border-bottom: 1px solid var(--ink);
    transition: color 0.4s ease, border-color 0.4s ease;
    align-items: baseline;
}
body.flood .project-row {
    border-color: var(--paper);
}

.p-name {
    display: flex;
    justify-content: space-between;
    transition: transform 0.3s ease;
    font-weight: 500;
    font-size: 1.125rem;
}
.p-year {
    text-align: right;
}

.project-arrow {
    opacity: 0;
    color: var(--signal-red);
    transform: translateX(calc(var(--u) * -2));
    transition: opacity 0.3s ease, transform 0.3s ease;
}

body.flood .project-row:hover .p-name {
    transform: translateX(calc(var(--u) * 2));
}
body.flood .project-row:hover .project-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* Method / Studio Layout */
.method-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--gutter);
    margin-top: calc(var(--u) * 8);
}
.method-title {
    font-size: 1.125rem;
    text-transform: uppercase;
    font-weight: 500;
    margin-bottom: calc(var(--u) * 2);
}

/* Capabilities Layout */
.cap-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gutter);
}
.cap-title {
    font-size: 1.125rem;
    font-weight: 500;
    margin-bottom: calc(var(--u) * 2);
    border-bottom: 1px solid var(--ink);
    padding-bottom: calc(var(--u) * 1);
}
body.flood .cap-title {
    border-color: var(--paper);
}
.capabilities-list {
    list-style-type: none;
    padding-left: 0;
}
.capabilities-list li {
    margin-bottom: calc(var(--u) * 1);
}

/* Footer / Contact */
.say-hello {
    font-size: 8vw;
    line-height: 1;
    margin-bottom: calc(var(--u) * 8); 
}

.contact-stack {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
    margin-bottom: calc(var(--u) * 12);
}

.contact-block {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    padding: calc(var(--u) * 2) 0;
}

.contact-block span {
    font-size: 1.125rem;
    margin-bottom: calc(var(--u) * 1);
}

.huge-contact {
    font-size: 2.25rem;
    letter-spacing: -0.045em;
    font-weight: 500;
    display: inline-block;
    padding: calc(var(--u) * 1);
    margin: calc(var(--u) * -1); /* neutralize padding for visual alignment */
}

.contact-divider {
    width: 100%;
    height: 1px;
    background-color: var(--ink);
    margin: calc(var(--u) * 2) 0;
    opacity: 0.3;
    transition: background-color 0.4s ease;
}
body.flood .contact-divider {
    background-color: var(--paper);
}

/* Contact Buttons */
.contact-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--gutter);
    width: 100%;
    max-width: 600px;
    align-items: flex-end;
    margin-bottom: calc(var(--u) * 4);
}

.btn-contact {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    border: 1px solid var(--ink);
    padding: calc(var(--u) * 2) calc(var(--u) * 3);
    width: 100%;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

.btn-contact:hover {
    background-color: var(--ink);
    color: var(--paper);
}

.btn-label {
    font-size: 1.125rem;
    text-transform: uppercase;
    opacity: 0.7;
    margin-bottom: calc(var(--u) * 0.5);
}

.btn-value {
    font-size: 1.125rem;
    font-weight: 500;
    letter-spacing: -0.02em;
}

body.flood .btn-contact {
    color: var(--paper);
    border-color: var(--paper);
}

body.flood .btn-contact:hover {
    background-color: var(--paper);
    color: var(--flood-color);
}

.footer-meta {
    display: grid;
    grid-template-columns: repeat(10, 1fr); /* inside the 10 col section content */
    gap: var(--gutter);
    border-top: 1px solid var(--ink);
    padding-top: calc(var(--u) * 2);
}
body.flood .footer-meta { border-color: var(--paper); }
.f-col:nth-child(1) { grid-column: 1 / 5; }
.f-col:nth-child(2) { grid-column: 5 / 8; display: flex; gap: calc(var(--u) * 3); }
.f-col:nth-child(3) { grid-column: 8 / 11; text-align: right; }

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

/* The Grid Overlay Styles */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 1440px;
    height: 100vh;
    padding: 0 calc(var(--u) * 6);
    pointer-events: none;
    z-index: 9999;
    
    display: grid;
    grid-template-columns: repeat(var(--cols), 1fr);
    gap: var(--gutter);
    opacity: 0;
    transition: opacity 0.2s ease;
}

@media (max-width: 768px) {
    .grid-overlay {
        padding: 0 calc(var(--u) * 3);
    }
}

.grid-overlay.on {
    opacity: 1;
}

.baseline-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    pointer-events: none;
    z-index: 9998;
    background: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent calc(var(--u) - 1px),
        rgba(0,0,0,0.05) var(--u)
    );
    opacity: 0;
    transition: opacity 0.2s ease;
}

.baseline-overlay.on {
    opacity: 1;
}

.grid-readout {
    position: fixed;
    bottom: calc(var(--u) * 3);
    right: calc(var(--u) * 3);
    background: var(--signal-red);
    color: var(--paper);
    padding: calc(var(--u) * 1) calc(var(--u) * 2);
    font-size: 1.125rem;
    font-variant-numeric: tabular-nums;
    z-index: 10000;
    opacity: 0;
    transform: translateY(calc(var(--u) * 2));
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.grid-readout.on {
    opacity: 1;
    transform: translateY(0);
}

.pulse {
    animation: pulse 0.3s ease;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

/* Mobile Adjustments for complex grids */
@media (max-width: 1024px) {
    .intro-grid, .project-row, .method-grid, .cap-grid, .footer-meta {
        grid-template-columns: 1fr;
    }
    .intro-text, .intro-meta {
        grid-column: 1 / -1;
        text-align: left;
    }
    .p-year, .meta-col, .f-col {
        text-align: left !important;
    }
    .section-number {
        grid-column: 1 / -1;
    }
    .section-content {
        grid-column: 1 / -1;
    }
    .logo-massive {
        font-size: 15vw;
    }
}