/* ============================================
   aei.st — Styles
   Temporal Bipolarity: 1960s Japanese Minimalism + 2089 Algorithmic Grids
   ============================================ */

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

:root {
    /* Palette */
    --sunbleached-linen: #F2ECE0;
    --foxed-cream: #E8DFD0;
    --darkroom-black: #1C1915;
    --warm-graphite: #3D382F;
    --daguerreotype-amber: #B8935A;
    --cyanotype-blue: #4A6E82;
    --tarnished-brass: #8A7D65;
    --darkroom-umber: #2A2520;

    /* Typography */
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Cormorant Garamond', serif;
    --font-mono: 'IBM Plex Mono', monospace;
    --font-kanji: 'Noto Serif JP', serif;

    /* Grid */
    --grid-columns: 16;
    --grid-gutter: 1.5vw;

    /* Animation */
    --ease-soft: cubic-bezier(0.16, 1, 0.3, 1);

    /* Drift (updated by JS) */
    --drift-x: 0;
    --drift-y: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--sunbleached-linen);
    color: var(--warm-graphite);
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    line-height: 1.75;
    overflow-x: hidden;
}

/* --- Noise Overlay --- */
.noise-svg {
    position: absolute;
    width: 0;
    height: 0;
}

.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.025;
    filter: url(#noiseFilter);
    background: transparent;
}

/* --- Registration Marks (Fixed Corners) --- */
.registration-mark {
    position: fixed;
    font-family: var(--font-mono);
    font-size: 8px;
    color: var(--tarnished-brass);
    opacity: 0.2;
    pointer-events: none;
    z-index: 9998;
    line-height: 1;
}

.registration-mark--tl {
    top: 12px;
    left: 12px;
}

.registration-mark--tr {
    top: 12px;
    right: 12px;
}

.registration-mark--bl {
    bottom: 12px;
    left: 12px;
}

.registration-mark--br {
    bottom: 12px;
    right: 12px;
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    display: grid;
    place-items: center;
}

.hero__bg {
    position: absolute;
    top: -30px;
    left: -30px;
    right: -30px;
    bottom: -30px;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(184, 147, 90, 0.08) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 60%, rgba(74, 110, 130, 0.04) 0%, transparent 50%),
        linear-gradient(135deg, var(--foxed-cream) 0%, var(--sunbleached-linen) 50%, var(--foxed-cream) 100%);
    filter: sepia(0.45) contrast(1.05) brightness(0.92) saturate(0.55);
    opacity: 0.12;
    transform: translate(calc(var(--drift-x) * 1px), calc(var(--drift-y) * 1px));
    z-index: 0;
}

.hero__grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    grid-template-rows: repeat(3, auto);
    gap: var(--grid-gutter);
    width: 90%;
    max-width: 1400px;
}

.hero__letter {
    font-family: var(--font-display);
    font-weight: 700;
    color: var(--darkroom-black);
    letter-spacing: -0.06em;
    line-height: 0.9;
    display: block;
    opacity: 0;
    will-change: transform, opacity;
}

.hero__letter--a {
    grid-column: 2 / 5;
    grid-row: 1;
    font-size: clamp(6rem, 14vw, 12rem);
    transform: translateX(-20px);
}

.hero__letter--ei {
    grid-column: 5 / 9;
    grid-row: 2;
    font-size: clamp(4rem, 10vw, 9rem);
    transform: translateX(-20px);
}

.hero__letter--st {
    grid-column: 8 / 12;
    grid-row: 3;
    font-size: clamp(3rem, 8vw, 7rem);
    transform: translateX(-20px);
}

/* Hero entrance animation states */
.hero__letter.visible {
    opacity: 1;
    transform: translateX(0);
    transition: opacity 800ms var(--ease-soft), transform 800ms var(--ease-soft);
}

/* ============================================
   INTERSTITIAL VOIDS
   ============================================ */
.void {
    width: 100%;
    height: 50vh;
    display: grid;
    place-items: center;
    position: relative;
}

.void__rule {
    border: none;
    height: 1px;
    background-color: var(--tarnished-brass);
    opacity: 0.2;
    width: 120px;
}

.watermark {
    font-family: var(--font-kanji);
    font-weight: 200;
    font-size: clamp(6vw, 8vw, 10vw);
    color: var(--tarnished-brass);
    opacity: 0.06;
    user-select: none;
    pointer-events: none;
    line-height: 1;
}

/* ============================================
   CONTENT BLOCKS
   ============================================ */
.content-block {
    position: relative;
    width: 100%;
    padding: 4rem 0;
    display: grid;
    grid-template-columns: repeat(16, 1fr);
    gap: var(--grid-gutter);
}

/* Overlap rhythm: odd blocks overlap upward */
.content-block:nth-child(odd) {
    --overlap: -3rem;
    margin-top: var(--overlap);
}

.content-block:nth-child(even) {
    --overlap: 0rem;
    margin-top: var(--overlap);
}

/* Wide-left: columns 2-10 */
.block--left .content-block__inner {
    grid-column: 2 / 10;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: var(--grid-gutter);
    align-items: start;
}

.block--left .content-block__text {
    grid-column: 1 / 6;
}

.block--left .content-block__image {
    grid-column: 5 / 9;
    margin-top: -3rem;
    position: relative;
}

/* Wide-right: columns 7-15 */
.block--right .content-block__inner {
    grid-column: 7 / 15;
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: var(--grid-gutter);
    align-items: start;
}

.block--right .content-block__text {
    grid-column: 2 / 7;
}

/* Dark (inverted) sections */
.block--dark {
    background-color: var(--darkroom-umber);
    padding: 6rem 0;
}

.block--dark .content-block__inner {
    position: relative;
}

/* Section headings */
.section-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 4rem);
    letter-spacing: -0.06em;
    color: var(--darkroom-black);
    line-height: 1;
    margin-bottom: 1.5rem;
}

.section-heading--light {
    color: var(--sunbleached-linen);
}

/* Body text */
.body-text {
    font-family: var(--font-body);
    font-weight: 400;
    font-size: clamp(1rem, 1.8vw, 1.25rem);
    line-height: 1.75;
    color: var(--warm-graphite);
    max-width: 38ch;
    margin-bottom: 1.25rem;
}

.body-text--light {
    color: var(--foxed-cream);
}

/* Meta labels */
.meta-label {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    color: var(--tarnished-brass);
    opacity: 0.7;
    display: block;
    margin-bottom: 0.75rem;
    text-transform: lowercase;
}

.meta-label--light {
    color: var(--daguerreotype-amber);
    opacity: 0.6;
}

/* Links */
a {
    color: var(--daguerreotype-amber);
    text-decoration: none;
    transition: color 300ms ease;
}

a:hover {
    color: var(--cyanotype-blue);
}

/* ============================================
   DECORATIVE ELEMENTS
   ============================================ */

/* Film Sprocket Holes */
.film-sprockets {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    justify-content: center;
    align-items: center;
}

.film-sprockets--right {
    right: -24px;
}

.film-sprockets--left {
    left: -24px;
}

.film-sprockets::before,
.film-sprockets::after {
    content: '';
    display: block;
}

/* Generate sprocket holes via repeating background */
.film-sprockets {
    background-image: repeating-linear-gradient(
        to bottom,
        transparent 0px,
        transparent 8px,
        rgba(138, 125, 101, 0.15) 8px,
        rgba(138, 125, 101, 0.15) 20px,
        transparent 20px,
        transparent 28px
    );
    background-size: 8px 28px;
    background-repeat: repeat-y;
    background-position: center;
    width: 8px;
}

/* Crosshair marks */
.crosshair {
    position: absolute;
    font-family: var(--font-mono);
    font-size: 6px;
    color: var(--tarnished-brass);
    opacity: 0.2;
    pointer-events: none;
    line-height: 1;
}

.crosshair--tl {
    top: 8px;
    left: 8px;
}

.crosshair--br {
    bottom: 8px;
    right: 8px;
}

/* Grid line decorations */
.grid-line {
    position: absolute;
    pointer-events: none;
}

.grid-line--incomplete {
    top: 10%;
    right: 5%;
    width: 80px;
    height: 60px;
    border-top: 1px solid rgba(138, 125, 101, 0.12);
    border-right: 1px solid rgba(138, 125, 101, 0.12);
    border-bottom: 1px solid rgba(138, 125, 101, 0.12);
    /* Three sides, left missing */
}

.grid-line--parallel {
    bottom: 20%;
    left: 8%;
    width: 100px;
    height: 30px;
    border-top: 1px solid rgba(138, 125, 101, 0.12);
    border-bottom: 1px solid rgba(138, 125, 101, 0.12);
    /* Parallel horizontal lines */
}

/* ============================================
   SCROLL REVEAL
   ============================================ */
.reveal {
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms var(--ease-soft), transform 600ms var(--ease-soft);
}

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

/* ============================================
   TERMINAL SECTION
   ============================================ */
.terminal {
    position: relative;
    width: 100%;
    height: 100vh;
    display: grid;
    place-items: center;
    overflow: hidden;
}

.terminal__bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background:
        radial-gradient(ellipse at 30% 40%, rgba(184, 147, 90, 0.12) 0%, transparent 60%),
        radial-gradient(ellipse at 70% 60%, rgba(74, 110, 130, 0.06) 0%, transparent 50%),
        linear-gradient(135deg, var(--foxed-cream) 0%, var(--sunbleached-linen) 50%, var(--foxed-cream) 100%);
    filter: sepia(0.45) contrast(1.05) brightness(0.92) saturate(0.55);
    opacity: 0.6;
    z-index: 0;
    transition: filter 30s ease;
}

.terminal__bg.intensify {
    filter: sepia(0.75) contrast(1.05) brightness(0.85) saturate(0.45);
}

.terminal__text {
    position: relative;
    z-index: 1;
    font-family: var(--font-body);
    font-weight: 400;
    font-style: italic;
    font-size: clamp(0.875rem, 1.5vw, 1.1rem);
    color: var(--warm-graphite);
    letter-spacing: 0.02em;
    text-align: center;
    max-width: 40ch;
    line-height: 1.75;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 800ms var(--ease-soft), transform 800ms var(--ease-soft);
}

.terminal__text.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   MAGNETIC ELEMENT BASE
   ============================================ */
.magnetic {
    transition: transform 400ms ease-out;
    will-change: transform;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .hero__grid {
        width: 85%;
    }

    .hero__letter--a {
        grid-column: 1 / 6;
    }

    .hero__letter--ei {
        grid-column: 4 / 10;
    }

    .hero__letter--st {
        grid-column: 7 / 13;
    }

    .block--left .content-block__inner {
        grid-column: 2 / 16;
    }

    .block--right .content-block__inner {
        grid-column: 2 / 16;
    }

    .block--left .content-block__text,
    .block--right .content-block__text {
        grid-column: 1 / -1;
    }

    .block--left .content-block__image {
        grid-column: 1 / -1;
        margin-top: 1rem;
    }

    .film-sprockets {
        display: none;
    }

    .grid-line {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero__letter--a {
        grid-column: 1 / 8;
    }

    .hero__letter--ei {
        grid-column: 3 / 11;
    }

    .hero__letter--st {
        grid-column: 6 / 14;
    }

    .content-block {
        padding: 2rem 1rem;
        display: block;
    }

    .content-block__inner {
        display: block;
    }

    .body-text {
        max-width: 100%;
    }

    .void {
        height: 30vh;
    }
}