/* ethica.dev - Dark Academia Descent */
@charset "UTF-8";

:root {
    --vault-black: #050102;
    --midnight-burgundy: #0D0408;
    --claret-shadow: #1A0610;
    --deep-oxblood: #2A0A14;
    --dusky-burgundy: #3A0D1A;
    --tarnished-gold: #C4A35A;
    --aged-parchment: #D8C8A8;
    --faded-ink: #9B8A6E;
    --ember-red: #8B1A2B;
}

*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: auto;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

body {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 400;
    color: var(--aged-parchment);
    background-color: var(--dusky-burgundy);
    line-height: 1.75;
    overflow-x: hidden;
    position: relative;
    font-variant-ligatures: common-ligatures discretionary-ligatures;
}

/* Paper Grain Texture Overlay */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 1000;
    mix-blend-mode: multiply;
}

/* Plumb Line */
#plumb-line {
    position: fixed;
    left: 50%;
    top: 0;
    width: 2px;
    height: 100vh;
    transform: translateX(-50%);
    z-index: 10;
    pointer-events: none;
}

#plumb-stroke {
    stroke-dasharray: 5000;
    stroke-dashoffset: 5000;
    transition: stroke-width 0.5s ease;
}

/* Chambers Base */
.chamber {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    transition: background-color 1s ease;
}

/* Chamber I - The Portico */
.chamber-1 {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--dusky-burgundy);
    padding: 2rem;
}

.chamber-content {
    text-align: center;
}

.hero-title {
    font-family: 'Playfair Display', serif;
    font-weight: 900;
    font-size: clamp(3.5rem, 10vw, 7rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--aged-parchment);
    line-height: 1;
    margin-bottom: 3rem;
}

.epigraph {
    font-family: 'IM Fell English', serif;
    font-style: italic;
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    letter-spacing: 0.03em;
    color: var(--faded-ink);
    opacity: 0;
    transition: opacity 1.5s ease;
}

.epigraph.visible {
    opacity: 1;
}

/* Chamber II - The Reading Room */
.chamber-2 {
    min-height: 150vh;
    background-color: var(--deep-oxblood);
    padding: 8rem 2rem;
    position: relative;
}

.codex-layout {
    display: grid;
    grid-template-columns: 120px 1fr 80px 1fr 120px;
    gap: 0 2rem;
    max-width: 860px;
    margin: 0 auto;
}

.margin-left, .margin-right {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    padding-top: 2rem;
}

.margin-note {
    font-family: 'Cormorant Garamond', serif;
    font-size: clamp(0.7rem, 1vw, 0.85rem);
    color: var(--faded-ink);
    line-height: 1.5;
    opacity: 0;
    transform: translateX(-20px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.margin-right .margin-note {
    transform: translateX(20px);
}

.margin-note.visible {
    opacity: 1;
    transform: translateX(0);
}

.column-left, .column-right {
    max-width: 38ch;
}

.body-text {
    font-size: clamp(1rem, 1.6vw, 1.25rem);
    line-height: 1.75;
    color: var(--aged-parchment);
    margin-bottom: 2rem;
    hyphens: auto;
}

.drop-cap {
    float: left;
    font-family: 'Playfair Display', serif;
    font-weight: 900;
    font-size: 3.5em;
    line-height: 0.8;
    margin-right: 0.5rem;
    margin-top: 0.1em;
    color: var(--ember-red);
}

.ornament {
    font-family: 'Noto Serif', serif;
    font-weight: 700;
    color: var(--tarnished-gold);
    margin: 0 0.2em;
}

.book-spine-left, .book-spine-right {
    position: absolute;
    top: 5%;
    width: 20px;
    height: 90%;
    background: linear-gradient(90deg,
        var(--deep-oxblood) 0%,
        var(--claret-shadow) 30%,
        var(--deep-oxblood) 50%,
        var(--claret-shadow) 70%,
        var(--deep-oxblood) 100%
    );
    opacity: 0.3;
}

.book-spine-left { left: 0; }
.book-spine-right { right: 0; }

/* Chamber III - The Restricted Stacks */
.chamber-3 {
    min-height: 150vh;
    background-color: var(--claret-shadow);
    padding: 8rem 2rem;
}

.stacks-content {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6rem;
}

.manuscript-page {
    background-color: rgba(26, 6, 16, 0.7);
    border-radius: 2px;
    padding: 3rem;
    max-width: 520px;
    box-shadow: 0 4px 20px rgba(5, 1, 2, 0.4);
    opacity: 0;
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.manuscript-page.rotate-pos {
    transform: rotate(1.2deg) translateY(20px);
    align-self: flex-start;
}

.manuscript-page.rotate-neg {
    transform: rotate(-0.8deg) translateY(20px);
    align-self: flex-end;
}

.manuscript-page.visible.rotate-pos {
    opacity: 1;
    transform: rotate(1.2deg) translateY(0);
}

.manuscript-page.visible.rotate-neg {
    opacity: 1;
    transform: rotate(-0.8deg) translateY(0);
}

/* Golden flip card */
.golden-card {
    border: 1px solid rgba(196, 163, 90, 0.3);
    cursor: pointer;
    perspective: 600px;
    transform-style: preserve-3d;
    position: relative;
    min-height: 200px;
    transition: transform 0.8s ease, opacity 0.8s ease, box-shadow 0.3s ease;
}

.golden-card:hover {
    transform: rotate(0.5deg) translateY(-4px);
    box-shadow: 0 8px 30px rgba(5, 1, 2, 0.6);
}

.golden-card .card-front,
.golden-card .card-back {
    backface-visibility: hidden;
    transition: transform 0.8s ease;
}

.golden-card .card-back {
    position: absolute;
    inset: 0;
    transform: rotateY(180deg);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    background-color: rgba(42, 10, 20, 0.9);
    border-radius: 2px;
}

.golden-card.flipped .card-front {
    transform: rotateY(180deg);
}

.golden-card.flipped .card-back {
    transform: rotateY(0deg);
}

.epigraph-text {
    font-family: 'IM Fell English', serif;
    font-style: italic;
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    letter-spacing: 0.03em;
    color: var(--tarnished-gold);
    text-align: center;
    line-height: 1.6;
}

.quill-decoration, .ink-blot {
    opacity: 0;
    transition: opacity 1.5s ease;
}

.quill-decoration.visible, .ink-blot.visible {
    opacity: 0.6;
}

.wax-seal {
    opacity: 0;
    transition: opacity 1.5s ease;
}

.wax-seal.visible {
    opacity: 0.6;
}

.chain-divider {
    width: 100%;
    height: 4px;
    margin-top: 6rem;
    background: repeating-linear-gradient(
        90deg,
        var(--claret-shadow) 0px,
        var(--claret-shadow) 12px,
        transparent 12px,
        transparent 16px,
        var(--claret-shadow) 16px,
        var(--claret-shadow) 20px,
        transparent 20px,
        transparent 24px
    );
    opacity: 0.15;
}

/* Chamber IV - The Forbidden Index */
.chamber-4 {
    min-height: 150vh;
    background-color: var(--midnight-burgundy);
    padding: 10rem 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.index-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4rem;
    width: 100%;
}

.skeleton-keys {
    opacity: 0.06;
    flex-shrink: 0;
}

.word-reveal-container {
    max-width: 28ch;
    text-align: left;
}

.forbidden-text {
    font-family: 'IM Fell English', serif;
    font-style: italic;
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    letter-spacing: 0.03em;
    color: var(--aged-parchment);
    line-height: 1.8;
}

.forbidden-text .word {
    opacity: 0;
    transition: opacity 0.4s ease;
    display: inline;
}

.forbidden-text .word.visible {
    opacity: 1;
}

/* Chamber V - The Vault */
.chamber-5 {
    min-height: 100vh;
    background-color: var(--vault-black);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
}

.vault-content {
    text-align: center;
    max-width: 800px;
}

.vault-proposition {
    font-family: 'Playfair Display', serif;
    font-weight: 900;
    font-size: clamp(3rem, 10vw, 8rem);
    line-height: 1.1;
    color: var(--aged-parchment);
    margin-bottom: 4rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.2s cubic-bezier(0.25, 0.1, 0.25, 1.0), transform 1.2s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

.vault-proposition.visible {
    opacity: 1;
    transform: translateY(0);
}

.colophon {
    font-family: 'Cormorant Garamond', serif;
    font-size: 0.7rem;
    color: var(--faded-ink);
    letter-spacing: 0.1em;
    opacity: 0;
    transition: opacity 1.5s ease 0.5s;
}

.colophon.visible {
    opacity: 1;
}

/* Reveal animations */
.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.2s cubic-bezier(0.25, 0.1, 0.25, 1.0), transform 1.2s cubic-bezier(0.25, 0.1, 0.25, 1.0);
}

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

.reveal-svg {
    opacity: 0;
    transition: opacity 1.5s ease;
}

.reveal-svg.visible {
    opacity: 0.6;
}

/* Background transitions per chamber */
.chamber-1 { background: var(--dusky-burgundy); }
.chamber-2 { background: var(--deep-oxblood); }
.chamber-3 { background: var(--claret-shadow); }
.chamber-4 { background: var(--midnight-burgundy); }
.chamber-5 { background: var(--vault-black); }

/* Responsive */
@media (max-width: 768px) {
    .codex-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .margin-left, .margin-right {
        display: none;
    }

    .column-left, .column-right {
        max-width: 100%;
    }

    .index-content {
        flex-direction: column;
    }

    .skeleton-keys {
        display: none;
    }

    .manuscript-page {
        align-self: center !important;
    }
}