/* ============================================================
   relative.quest — Surreal Diagonal Dreamscape
   Palette: Twilight Chromatics
     #0D0A14 Void Indigo       #2E2438 Deep Violet Ink
     #7B6B8A Twilight Mauve    #C4A882 Amber Glow
     #E8DFD0 Parchment Bone    #4A3D5C Shadow Violet
     #D4A574 Brass Patina      #1A1528 Obsidian Plum
   Fonts: Cormorant Garamond, Libre Baskerville, Space Mono
   ============================================================ */

:root {
    --void-indigo: #0D0A14;
    --deep-violet-ink: #2E2438;
    --twilight-mauve: #7B6B8A;
    --amber-glow: #C4A882;
    --parchment-bone: #E8DFD0;
    --shadow-violet: #4A3D5C;
    --brass-patina: #D4A574;
    --obsidian-plum: #1A1528;

    --serif-display: "Cormorant Garamond", "Cormorant", "EB Garamond", Georgia, serif;
    --serif-body: "Libre Baskerville", "Lora", Georgia, serif;
    --mono-meta: "Space Mono", "IBM Plex Mono", ui-monospace, monospace;

    --corridor-progress: 0;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--void-indigo);
    color: var(--parchment-bone);
    font-family: var(--serif-body);
    line-height: 1.85;
    font-size: 16px;
    overflow-x: hidden;
}

body {
    background:
        radial-gradient(ellipse 1400px 900px at 30% 10%, rgba(46, 36, 56, 0.55), transparent 70%),
        radial-gradient(ellipse 1200px 800px at 80% 70%, rgba(74, 61, 92, 0.35), transparent 70%),
        radial-gradient(ellipse 1000px 600px at 50% 100%, rgba(26, 21, 40, 0.7), transparent 65%),
        var(--void-indigo);
    min-height: 100vh;
    position: relative;
}

/* ---------- Background field: grids, observers, compass ---------- */

.background-field {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.perspective-grid {
    position: absolute;
    width: 130vw;
    height: 130vh;
    left: -15vw;
    top: -15vh;
    mix-blend-mode: screen;
}

.grid-one { transform: rotate(-1.4deg); }
.grid-two { transform: rotate(2.8deg) translateX(-8vw); opacity: 0.8; }

.observer-marker {
    position: absolute;
    color: var(--twilight-mauve);
    opacity: 0.4;
    font-family: var(--mono-meta);
    display: flex;
    align-items: baseline;
    gap: 6px;
    transform: translate(-50%, -50%);
}

.observer-marker .cross {
    font-size: 14px;
    line-height: 1;
}

.observer-marker .coord {
    font-size: 9px;
    letter-spacing: 0.08em;
    white-space: nowrap;
}

.compass-rose {
    position: fixed;
    top: 50vh;
    left: 6vw;
    transform: translateY(-50%) rotate(11deg);
    z-index: 1;
    pointer-events: none;
}

/* ---------- Section scaffolding ---------- */

.observer-path {
    position: relative;
    z-index: 1;
}

.section {
    position: relative;
    padding: 14vh 6vw;
    overflow: visible;
    opacity: 0;
    transition: opacity 1.5s ease-in;
}

.section.is-visible { opacity: 1; }

.section-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    align-items: baseline;
    font-family: var(--mono-meta);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--twilight-mauve);
    text-transform: lowercase;
    margin-bottom: 4vh;
}

.meta-label {
    color: var(--brass-patina);
    letter-spacing: 0.18em;
}

.meta-coord {
    color: var(--twilight-mauve);
}

.section-title {
    font-family: var(--serif-display);
    font-weight: 300;
    font-size: clamp(40px, 6vw, 88px);
    letter-spacing: -0.03em;
    line-height: 1.05;
    color: var(--parchment-bone);
    margin: 0 0 0.6em 0;
}

.section-lede {
    font-family: var(--serif-body);
    font-style: italic;
    font-size: 17px;
    color: var(--parchment-bone);
    opacity: 0.85;
    max-width: 540px;
    line-height: 1.7;
}

.horizon-line {
    position: absolute;
    left: 0;
    right: 0;
    height: 0.5px;
    background: var(--amber-glow);
    opacity: 0.45;
    pointer-events: none;
}

.horizon-1 { bottom: 12%; transform: rotate(-0.6deg); }
.horizon-2 { top: 22%; transform: rotate(1.1deg); }
.horizon-3 { top: 50%; transform: rotate(-0.4deg); opacity: 0.55; }
.horizon-4 { bottom: 18%; transform: rotate(0.8deg); }
.horizon-5 { top: 30%; transform: rotate(-1.2deg); }

/* ---------- Section 1: The Threshold ---------- */

.threshold {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(180deg, transparent 0%, rgba(13, 10, 20, 0.0) 100%);
}

.threshold-stage {
    position: relative;
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
}

.word-plane {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.plane-upper {
    transform: rotate(-3deg) translateY(2vh);
    transform-origin: 30% bottom;
}

.plane-lower {
    transform: rotate(3deg) translateY(-2vh);
    transform-origin: 70% top;
}

.split-word {
    font-family: var(--serif-display);
    font-weight: 300;
    font-size: clamp(110px, 22vw, 320px);
    line-height: 1;
    letter-spacing: -0.05em;
    color: var(--parchment-bone);
    margin: 0;
    text-align: center;
    white-space: nowrap;
}

.split-top {
    clip-path: inset(0 0 50% 0);
    margin-bottom: -0.5em;
    text-shadow: 0 0 60px rgba(196, 168, 130, 0.08);
}

.split-bottom {
    clip-path: inset(50% 0 0 0);
    margin-top: -0.5em;
    color: var(--amber-glow);
    opacity: 0.92;
}

.fracture-line {
    position: relative;
    height: 1px;
    background: var(--obsidian-plum);
    box-shadow: 0 0 0 1px rgba(26, 21, 40, 0.6), 0 -8px 22px rgba(13, 10, 20, 0.7);
    margin: 0 0;
    transform: rotate(-0.4deg);
    z-index: 2;
}

.fracture-meta {
    position: absolute;
    right: 8vw;
    top: -22px;
    font-family: var(--mono-meta);
    font-size: 9px;
    letter-spacing: 0.12em;
    color: var(--twilight-mauve);
    background: var(--void-indigo);
    padding: 2px 8px;
}

.threshold-whisper {
    margin-top: 8vh;
    max-width: 460px;
    margin-left: auto;
    margin-right: 8vw;
    font-family: var(--serif-body);
    font-style: italic;
    font-size: 15px;
    line-height: 1.8;
    color: var(--twilight-mauve);
    transform: rotate(-1.4deg);
}

.arc-threshold {
    position: absolute;
    left: 50%;
    bottom: 6vh;
    transform: translateX(-50%);
}

/* ---------- Section 2: Gallery of Perspectives ---------- */

.gallery {
    min-height: 140vh;
    padding-top: 18vh;
    padding-bottom: 14vh;
}

.gallery-header {
    max-width: 640px;
    margin: 0 auto 10vh auto;
    transform: rotate(-1.5deg);
    text-align: center;
}

.panel-cascade {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 8vh 0;
}

.panel {
    position: relative;
    background: var(--parchment-bone);
    color: var(--deep-violet-ink);
    border: 1px solid var(--shadow-violet);
    padding: 44px 48px 52px 48px;
    width: 560px;
    max-width: 88vw;
    box-shadow:
        0 22px 60px rgba(13, 10, 20, 0.55),
        inset 0 0 0 1px rgba(74, 61, 92, 0.15);
}

.panel::before {
    /* Misaligned shadow plane (parallelogram) */
    content: "";
    position: absolute;
    inset: 18px -22px -22px 22px;
    background: var(--obsidian-plum);
    opacity: 0.32;
    transform: skewX(-8deg);
    z-index: -1;
}

.panel-1 {
    margin: 0 auto 0 4vw;
    transform: rotate(-2deg);
    z-index: 3;
}

.panel-2 {
    margin: -40px auto -40px auto;
    transform: rotate(2deg);
    z-index: 2;
}

.panel-2::before {
    inset: -22px 22px 18px -22px;
    transform: skewX(8deg);
}

.panel-3 {
    margin: 0 4vw 0 auto;
    transform: rotate(6deg);
    z-index: 1;
}

.panel-3::before {
    inset: 22px -28px -28px -8px;
    transform: skewX(-12deg);
}

.panel-coord {
    display: inline-block;
    font-family: var(--mono-meta);
    font-size: 10px;
    letter-spacing: 0.12em;
    color: var(--twilight-mauve);
    text-transform: lowercase;
    margin-bottom: 18px;
    border-bottom: 0.5px solid var(--shadow-violet);
    padding-bottom: 6px;
}

.panel-heading {
    font-family: var(--serif-display);
    font-weight: 400;
    font-size: 28px;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: var(--deep-violet-ink);
    margin: 0 0 18px 0;
}

.panel-body {
    font-family: var(--serif-body);
    font-size: 15px;
    line-height: 1.85;
    color: var(--deep-violet-ink);
    margin: 0;
}

.panel-footer {
    margin-top: 26px;
    padding-top: 14px;
    border-top: 0.5px solid var(--shadow-violet);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    font-family: var(--mono-meta);
    font-size: 9px;
    letter-spacing: 0.1em;
    color: var(--twilight-mauve);
    text-transform: lowercase;
}

.footer-rule {
    flex: 1;
    color: var(--shadow-violet);
    text-align: center;
    overflow: hidden;
}

.arc-gallery {
    display: block;
    margin: 6vh auto 0 auto;
    transform: rotate(2deg);
}

/* ---------- Section 3: The Inversion ---------- */

.inversion {
    min-height: 100vh;
    padding-top: 14vh;
    padding-bottom: 14vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background:
        linear-gradient(180deg, rgba(26, 21, 40, 0.0) 0%, rgba(26, 21, 40, 0.45) 50%, rgba(26, 21, 40, 0.0) 100%);
}

.ceiling-boundary {
    position: relative;
    display: flex;
    align-items: center;
    gap: 18px;
    margin: 0 auto 8vh auto;
    width: 90%;
    max-width: 1100px;
    transform: rotate(-0.6deg);
}

.boundary-label-left,
.boundary-label-right {
    font-family: var(--mono-meta);
    font-size: 10px;
    letter-spacing: 0.18em;
    color: var(--twilight-mauve);
    text-transform: lowercase;
    flex-shrink: 0;
}

.boundary-rule {
    flex: 1;
    height: 1px;
    background: var(--twilight-mauve);
    opacity: 0.7;
}

.inverted-block {
    max-width: 720px;
    margin: 0 auto;
    transform: rotate(180deg);
    direction: rtl;
    text-align: left;
    padding: 40px;
    border: 0.5px solid var(--shadow-violet);
    background: rgba(46, 36, 56, 0.55);
    backdrop-filter: blur(2px);
}

.inverted-block .meta-label {
    display: inline-block;
    direction: ltr;
    margin-bottom: 18px;
    color: var(--brass-patina);
    font-family: var(--mono-meta);
    font-size: 10px;
    letter-spacing: 0.16em;
    text-transform: lowercase;
}

.inverted-block .section-title {
    direction: ltr;
    text-align: left;
    font-size: clamp(32px, 4vw, 56px);
    color: var(--parchment-bone);
}

.inverted-body {
    direction: ltr;
    text-align: left;
    font-family: var(--serif-body);
    font-size: 15px;
    line-height: 1.9;
    color: var(--parchment-bone);
    margin: 0 0 1.4em 0;
}

.inverted-footer {
    display: block;
    direction: ltr;
    text-align: left;
    font-family: var(--mono-meta);
    font-size: 9px;
    letter-spacing: 0.14em;
    color: var(--twilight-mauve);
    text-transform: lowercase;
    margin-top: 18px;
}

/* ---------- Section 4: The Vanishing Corridor ---------- */

.corridor {
    min-height: 130vh;
    padding-top: 14vh;
    padding-bottom: 10vh;
    transform: rotate(-1.2deg);
    transform-origin: center top;
}

.corridor-header {
    max-width: 800px;
    margin: 0 auto 8vh auto;
    text-align: center;
}

.corridor-shell {
    position: relative;
    margin: 0 auto;
    width: min(820px, 92vw);
    padding: 60px 0 80px 0;
}

.corridor-walls {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.wall {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 0.5px;
    background: linear-gradient(180deg, transparent 0%, var(--brass-patina) 12%, var(--brass-patina) 88%, transparent 100%);
    opacity: 0.55;
}

.wall-left {
    left: 0;
    transform: skewX(8deg);
    transform-origin: top left;
}

.wall-right {
    right: 0;
    transform: skewX(-8deg);
    transform-origin: top right;
}

.corridor-text {
    position: relative;
    margin: 0 auto;
    width: calc(800px - var(--corridor-progress) * 600px);
    max-width: 92vw;
    transition: width 0.2s linear;
    font-size: calc(18px - var(--corridor-progress) * 7px);
    line-height: 1.85;
    color: var(--parchment-bone);
    font-family: var(--serif-body);
    transition-property: width, font-size;
    transition-duration: 0.25s;
    transition-timing-function: ease-out;
}

.corridor-step {
    margin: 0 auto 1.6em auto;
    text-align: center;
    color: var(--parchment-bone);
}

.corridor-step:nth-child(odd) {
    color: var(--parchment-bone);
}

.corridor-step:nth-child(even) {
    color: var(--amber-glow);
    opacity: 0.92;
}

/* ---------- Section 5: The Return ---------- */

.return {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    background: linear-gradient(180deg, transparent 0%, rgba(26, 21, 40, 0.55) 100%);
}

.return-stage .plane-upper.return-upper {
    transform: rotate(3deg) translateY(2vh);
    transform-origin: 70% bottom;
}

.return-stage .plane-lower.return-lower {
    transform: rotate(-3deg) translateY(-2vh);
    transform-origin: 30% top;
}

.return-fracture {
    transform: rotate(0.4deg);
}

.return-stage .split-top {
    color: var(--amber-glow);
    opacity: 0.92;
}

.return-stage .split-bottom {
    color: var(--parchment-bone);
}

.return-whisper {
    margin-left: 8vw;
    margin-right: auto;
    transform: rotate(1.4deg);
}

.arc-return {
    position: absolute;
    left: 50%;
    bottom: 6vh;
    transform: translateX(-50%) scaleY(-1);
}

/* ---------- Footer ---------- */

.page-footer {
    position: relative;
    padding: 6vh 6vw 8vh 6vw;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 14px;
    font-family: var(--mono-meta);
    font-size: 10px;
    letter-spacing: 0.14em;
    color: var(--twilight-mauve);
    text-transform: lowercase;
    transform: rotate(-0.4deg);
}

.footer-line {
    width: 60%;
    height: 0.5px;
    background: var(--shadow-violet);
}

.footer-meta-line {
    color: var(--twilight-mauve);
}

.footer-coord {
    color: var(--brass-patina);
    opacity: 0.7;
}

/* ---------- Moire interference at section seams ---------- */

.section + .section {
    margin-top: -4vh;
}

.section + .section::before {
    content: "";
    position: absolute;
    inset: -4vh 0 auto 0;
    height: 8vh;
    background:
        repeating-linear-gradient(
            91deg,
            transparent 0,
            transparent 6px,
            rgba(74, 61, 92, 0.07) 6px,
            rgba(74, 61, 92, 0.07) 7px
        ),
        repeating-linear-gradient(
            89deg,
            transparent 0,
            transparent 6px,
            rgba(196, 168, 130, 0.05) 6px,
            rgba(196, 168, 130, 0.05) 7px
        );
    pointer-events: none;
    z-index: 0;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
    .panel { width: 90vw; padding: 32px 28px; }
    .panel-1 { margin-left: 2vw; }
    .panel-3 { margin-right: 2vw; }
    .compass-rose { display: none; }
    .threshold-whisper { margin-right: 4vw; max-width: 86vw; }
    .return-whisper { margin-left: 4vw; }
    .corridor-text { width: calc(700px - var(--corridor-progress) * 520px); max-width: 90vw; }
}

@media (max-width: 560px) {
    .section { padding: 10vh 5vw; }
    .split-word { font-size: clamp(80px, 28vw, 180px); }
    .gallery-header { transform: rotate(-1deg); }
    .panel-1, .panel-2, .panel-3 { transform: rotate(-1.4deg); }
    .panel-2 { transform: rotate(1.4deg); }
    .panel-3 { transform: rotate(3deg); }
    .corridor { transform: rotate(-0.6deg); }
}