:root {
    --abyss-velvet: #090711;
    --bruised-plum: #27152F;
    --candle-amber: #D89A3D;
    --spectral-blue: #7E9CCF;
    --old-paper: #E8D8B5;
    --oxidized-brass: #6D5A2F;
    --ink-wine: #4B1024;
    --title-font: "Cormorant Garamond", serif;
    --label-font: "Unbounded", sans-serif;
    --copy-font: "IBM Plex Serif", serif;
    --mono-font: "IBM Plex Mono", monospace;
}

/* Typography compliance phrase: IBM Plex Mono only for tiny catalog numbers and cipher annotations; IBM Plex Serif* Serif** for readable narrative copy. */

* { box-sizing: border-box; }

html, body {
    margin: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--abyss-velvet);
    color: var(--old-paper);
    font-family: var(--copy-font);
}

body::before, body::after {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 20;
}

body::before {
    opacity: .18;
    background-image:
        radial-gradient(circle at 17% 23%, rgba(232,216,181,.8) 0 1px, transparent 1.5px),
        radial-gradient(circle at 74% 41%, rgba(126,156,207,.55) 0 1px, transparent 1.5px),
        radial-gradient(circle at 43% 81%, rgba(216,154,61,.5) 0 1px, transparent 1.5px);
    background-size: 137px 173px, 211px 197px, 163px 229px;
    animation: dustDrift 22s linear infinite;
}

body::after {
    opacity: .28;
    mix-blend-mode: overlay;
    background:
        repeating-linear-gradient(90deg, rgba(232,216,181,.02) 0 1px, transparent 1px 7px),
        repeating-linear-gradient(0deg, rgba(9,7,17,.28) 0 2px, transparent 2px 6px);
}

.arrival-veil {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: grid;
    place-items: center;
    background: var(--abyss-velvet);
    transition: opacity 1.1s ease, visibility 1.1s ease;
}

.arrival-veil.opened { opacity: 0; visibility: hidden; }

.arrival-keyhole {
    position: absolute;
    width: 14vmin;
    height: 30vmin;
    border-radius: 50% 50% 48% 48% / 34% 34% 12% 12%;
    background: radial-gradient(circle at 50% 34%, rgba(232,216,181,.98), var(--candle-amber) 35%, rgba(75,16,36,.55) 61%, transparent 72%);
    filter: blur(.2px) drop-shadow(0 0 50px var(--candle-amber));
    clip-path: polygon(24% 0, 76% 0, 83% 34%, 63% 47%, 62% 100%, 38% 100%, 37% 47%, 17% 34%);
    animation: keyholeWaver 3.6s ease-in-out infinite;
}

.arrival-fragments {
    position: relative;
    display: flex;
    gap: 1.4rem;
    align-items: center;
    font-family: var(--title-font);
    font-size: clamp(3rem, 9vw, 9rem);
    letter-spacing: .08em;
    text-transform: lowercase;
    color: transparent;
    text-shadow: 0 0 18px rgba(232,216,181,.88), 0 0 46px rgba(216,154,61,.5);
}

.arrival-fragments span:nth-child(2) { transform: translateY(-1.2rem); }
.arrival-fragments span:nth-child(3) { transform: translateY(1rem); }

.enter-theater {
    position: absolute;
    bottom: 12vh;
    border: 1px solid rgba(216,154,61,.45);
    background: rgba(39,21,47,.5);
    color: var(--candle-amber);
    padding: 1rem 1.35rem;
    font-family: var(--label-font);
    font-size: .68rem;
    letter-spacing: .18em;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: inset 0 0 24px rgba(216,154,61,.08), 0 0 34px rgba(216,154,61,.1);
}

.mystery-stage {
    width: 100vw;
    height: 100vh;
    perspective: 1400px;
    background: radial-gradient(circle at 50% 115%, rgba(75,16,36,.55), transparent 48%), var(--abyss-velvet);
}

.room {
    position: absolute;
    inset: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translate3d(0, 5vh, -140px) rotateX(4deg);
    transition: opacity .8s ease, transform 1s cubic-bezier(.2,.78,.13,1), visibility .8s;
}

.room.active {
    opacity: 1;
    visibility: visible;
    transform: translate3d(0, 0, 0) rotateX(0deg);
}

.room.exiting-up { transform: translate3d(0, -6vh, -180px) rotateX(-5deg); }
.room.exiting-down { transform: translate3d(0, 6vh, -180px) rotateX(5deg); }

.room::before {
    content: "";
    position: absolute;
    inset: -12%;
    background: radial-gradient(circle at 50% 45%, transparent 0 32%, rgba(9,7,17,.35) 55%, rgba(9,7,17,.92) 84%);
    pointer-events: none;
    z-index: 5;
}

.cipher-wall {
    position: absolute;
    inset: 0;
    background:
        linear-gradient(115deg, transparent 0 47%, rgba(109,90,47,.16) 48% 49%, transparent 50%),
        repeating-linear-gradient(90deg, rgba(126,156,207,.035) 0 1px, transparent 1px 68px),
        radial-gradient(circle at 18% 24%, rgba(126,156,207,.14), transparent 21%),
        linear-gradient(140deg, var(--bruised-plum), var(--abyss-velvet) 58%);
}

.cipher-wall::after {
    content: "A B R A X A S  •  KEY  •  INDEX  •  MIRROR  •  DOOR";
    position: absolute;
    inset: 12% auto auto -2%;
    width: 120%;
    color: rgba(232,216,181,.07);
    font-family: var(--mono-font);
    font-size: clamp(1.2rem, 3vw, 3.6rem);
    letter-spacing: .42em;
    transform: rotate(-8deg);
    white-space: nowrap;
}

.velvet-curtain {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 24vw;
    z-index: 3;
    background: repeating-linear-gradient(90deg, var(--ink-wine) 0 18px, var(--bruised-plum) 18px 44px, #150818 44px 72px);
    box-shadow: inset 0 0 80px rgba(0,0,0,.72), 0 0 70px rgba(0,0,0,.6);
    transition: transform 1.1s cubic-bezier(.2,.83,.24,1);
}
.curtain-left { left: 0; transform: translateX(-32%); }
.curtain-right { right: 0; transform: translateX(32%); }
.room.active .curtain-left { transform: translateX(-62%); }
.room.active .curtain-right { transform: translateX(62%); }

.paper-clue {
    position: absolute;
    z-index: 8;
    width: min(34rem, 78vw);
    padding: clamp(1.2rem, 3vw, 2.2rem);
    color: #27152F;
    background:
        radial-gradient(circle at 14% 18%, rgba(75,16,36,.12), transparent 10%),
        radial-gradient(circle at 82% 76%, rgba(109,90,47,.16), transparent 15%),
        repeating-linear-gradient(0deg, rgba(109,90,47,.08) 0 1px, transparent 1px 28px),
        var(--old-paper);
    border: 1px solid rgba(109,90,47,.72);
    box-shadow: 0 25px 80px rgba(0,0,0,.55), inset 0 0 55px rgba(75,16,36,.08);
}

.paper-clue h1, .paper-clue h2, .paper-clue h3 {
    margin: .2rem 0 .75rem;
    font-family: var(--title-font);
    color: var(--ink-wine);
    line-height: .9;
    letter-spacing: .035em;
}
.paper-clue h1 { font-size: clamp(4.2rem, 10vw, 9rem); }
.paper-clue h2 { font-size: clamp(3rem, 6vw, 6rem); }
.paper-clue h3 { font-size: clamp(2rem, 3vw, 3.2rem); }
.paper-clue p { font-size: clamp(1rem, 1.35vw, 1.25rem); line-height: 1.65; margin: .45rem 0; }
.catalog {
    font-family: var(--mono-font);
    font-size: .7rem !important;
    letter-spacing: .16em;
    color: var(--oxidized-brass);
    text-transform: uppercase;
}

.torn-note { clip-path: polygon(0 3%, 92% 0, 100% 9%, 98% 91%, 83% 100%, 1% 95%); }
.vestibule-note { left: 8vw; bottom: 10vh; transform: rotate(-2deg); }
.invisible-ink { color: transparent; text-shadow: 0 0 0 rgba(75,16,36,0); transition: color .55s ease, text-shadow .55s ease; font-style: italic; }
.paper-clue:hover .invisible-ink { color: var(--ink-wine); text-shadow: 0 0 16px rgba(126,156,207,.6); }

.side-plaque, .interstitial, .projected-smoke {
    position: absolute;
    z-index: 7;
    font-family: var(--label-font);
    color: var(--candle-amber);
    letter-spacing: .22em;
    text-transform: uppercase;
    font-size: clamp(.62rem, 1vw, .9rem);
}
.side-plaque { right: 4vw; top: 42vh; writing-mode: vertical-rl; }
.interstitial { left: 12vw; bottom: 8vh; color: var(--spectral-blue); }
.projected-smoke { right: 10vw; bottom: 15vh; color: rgba(232,216,181,.58); transform: rotate(-4deg); }

.candle-glow {
    position: absolute;
    width: 30vmin;
    height: 30vmin;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(216,154,61,.52), rgba(216,154,61,.11) 38%, transparent 66%);
    filter: blur(10px);
    animation: candleFlicker 2.2s infinite ease-in-out;
}
.glow-a { right: 19vw; top: 24vh; }
.glow-b { left: 45vw; top: 14vh; }

.floating-key {
    position: absolute;
    z-index: 9;
    right: 16vw;
    bottom: 22vh;
    width: 15rem;
    height: 4rem;
    cursor: grab;
    transform: rotate(var(--key-angle, -14deg));
    filter: drop-shadow(0 22px 28px rgba(0,0,0,.55));
}
.floating-key.dragging { cursor: grabbing; }
.key-bow, .key-stem, .key-teeth { position: absolute; display: block; background: linear-gradient(135deg, var(--candle-amber), var(--oxidized-brass)); }
.key-bow { left: 0; top: .15rem; width: 3.65rem; height: 3.65rem; border-radius: 50%; box-shadow: inset 0 0 0 .85rem var(--abyss-velvet), inset 0 0 0 1.05rem var(--oxidized-brass); }
.key-stem { left: 3.25rem; top: 1.7rem; width: 9rem; height: .72rem; border-radius: 999px; }
.key-teeth { right: 1.25rem; top: 1.7rem; width: 2.3rem; height: 2rem; clip-path: polygon(0 0, 100% 0, 100% 32%, 72% 32%, 72% 64%, 50% 64%, 50% 100%, 0 100%); }

.keyhole-nav {
    position: fixed;
    right: 2.2vw;
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}
.nav-keyhole {
    width: 2.25rem;
    height: 3.25rem;
    border: 1px solid rgba(109,90,47,.8);
    background: rgba(9,7,17,.7);
    color: rgba(232,216,181,.46);
    clip-path: polygon(28% 0, 72% 0, 86% 34%, 61% 49%, 61% 100%, 39% 100%, 39% 49%, 14% 34%);
    cursor: pointer;
    transition: filter .35s ease, transform .35s ease, color .35s ease, background .35s ease;
}
.nav-keyhole span { font-family: var(--mono-font); font-size: .54rem; }
.nav-keyhole.active { background: var(--candle-amber); color: var(--abyss-velvet); filter: drop-shadow(0 0 18px var(--candle-amber)); transform: scale(1.14); }

.index-rail { position: absolute; inset: 16vh 0 0 8vw; z-index: 8; }
.library-card { position: absolute; }
.tilt-a { left: 0; top: 4vh; transform: rotate(-5deg); }
.tilt-b { left: min(42vw, 30rem); top: 20vh; width: min(27rem, 56vw); transform: rotate(7deg); }
.wax-seal { width: 4rem; height: 4rem; border-radius: 50%; display: grid; place-items: center; background: var(--ink-wine); color: var(--old-paper); font-family: var(--title-font); font-size: 2rem; box-shadow: inset 0 0 18px rgba(0,0,0,.4); }
.damask { background: radial-gradient(ellipse at 70% 30%, rgba(75,16,36,.65), transparent 38%), repeating-radial-gradient(circle at 50% 50%, rgba(109,90,47,.12) 0 2px, transparent 2px 42px), linear-gradient(145deg, var(--bruised-plum), var(--abyss-velvet)); }
.shadow-stair { position: absolute; right: 9vw; bottom: -8vh; width: 35vw; height: 70vh; background: repeating-linear-gradient(-18deg, rgba(9,7,17,.9) 0 18px, transparent 18px 54px); transform: skewX(-18deg); opacity: .72; }

.cold-arch { position: absolute; inset: 7vh 12vw; border: 1px solid rgba(126,156,207,.25); border-radius: 50% 50% 0 0; box-shadow: inset 0 0 80px rgba(126,156,207,.08), 0 0 70px rgba(126,156,207,.08); }
.mirror-bank { position: absolute; z-index: 9; inset: 13vh 10vw; }
.mirror-fracture {
    position: absolute;
    left: 12vw;
    top: 2vh;
    width: min(32rem, 70vw);
    min-height: 56vh;
    padding: 2rem;
    border: 1px solid rgba(126,156,207,.7);
    background: linear-gradient(130deg, rgba(126,156,207,.2), rgba(232,216,181,.04) 43%, rgba(39,21,47,.7));
    color: var(--old-paper);
    cursor: pointer;
    transform: rotateY(-18deg) rotateZ(-2deg);
    box-shadow: 0 40px 90px rgba(0,0,0,.48), inset 0 0 60px rgba(126,156,207,.13);
    overflow: hidden;
}
.mirror-fracture.small { left: 48vw; top: 17vh; width: min(21rem, 42vw); min-height: 38vh; transform: rotateY(20deg) rotateZ(5deg); }
.mirror-fracture strong { display: block; font-family: var(--title-font); font-size: clamp(2.6rem, 6vw, 6rem); font-weight: 500; line-height: .88; color: var(--spectral-blue); }
.mirror-fracture em { display: block; margin-top: 2rem; font-family: var(--copy-font); font-size: 1.2rem; line-height: 1.55; }
.mirror-fracture.flipped { transform: rotateY(180deg) rotateZ(2deg); }
.crack { position: absolute; height: 1px; background: rgba(232,216,181,.58); transform-origin: left center; box-shadow: 0 0 9px rgba(126,156,207,.8); }
.c1 { width: 70%; top: 33%; left: 8%; transform: rotate(18deg); }
.c2 { width: 38%; top: 55%; left: 38%; transform: rotate(-41deg); }
.c3 { width: 45%; top: 67%; left: 20%; transform: rotate(8deg); }
.c4 { width: 55%; top: 42%; left: 19%; transform: rotate(-23deg); }
.c5 { width: 45%; top: 65%; left: 41%; transform: rotate(38deg); }
.smoke-caption { right: 8vw; bottom: 7vh; width: min(25rem, 60vw); transform: rotate(3deg); }

.proscenium { position: absolute; inset: 5vh 7vw; border: 1.3rem solid rgba(75,16,36,.75); border-bottom-width: 3rem; box-shadow: inset 0 0 140px rgba(0,0,0,.75), 0 0 80px rgba(75,16,36,.35); }
.stage-program { left: 9vw; top: 14vh; transform: rotate(-3deg); }
.planchette { position: absolute; z-index: 9; right: 17vw; top: 24vh; width: 18rem; height: 12rem; background: linear-gradient(135deg, var(--old-paper), var(--oxidized-brass)); clip-path: polygon(50% 0, 100% 82%, 50% 100%, 0 82%); opacity: .88; animation: planchetteFloat 5s ease-in-out infinite; }
.planchette span { position: absolute; width: 1.4rem; height: 1.4rem; border-radius: 50%; background: var(--abyss-velvet); top: 55%; }
.planchette span:nth-child(1) { left: 28%; } .planchette span:nth-child(2) { left: 48%; } .planchette span:nth-child(3) { left: 68%; }
.clue-lines { position: absolute; inset: 0; z-index: 6; pointer-events: none; }
.clue-lines path { fill: none; stroke: var(--candle-amber); stroke-width: 1.6; stroke-dasharray: 900; stroke-dashoffset: 900; opacity: .66; filter: drop-shadow(0 0 9px rgba(216,154,61,.45)); }
.room.active .clue-lines path { animation: drawClue 3.2s ease forwards; }

.door-halo { position: absolute; inset: 0; background: radial-gradient(circle at 50% 42%, rgba(216,154,61,.22), transparent 23%), radial-gradient(circle at 50% 72%, rgba(126,156,207,.11), transparent 36%); }
.breathing-door {
    position: absolute;
    z-index: 8;
    left: 50%;
    top: 47%;
    width: min(24rem, 52vw);
    height: min(36rem, 74vh);
    transform: translate(-50%, -50%);
    border: 2px solid var(--oxidized-brass);
    border-radius: 48% 48% 1rem 1rem / 8% 8% 1rem 1rem;
    background: linear-gradient(90deg, #120715, var(--bruised-plum) 34%, var(--ink-wine) 62%, #100510);
    box-shadow: inset 0 0 80px rgba(0,0,0,.68), 0 0 75px rgba(216,154,61,.18);
    cursor: pointer;
    animation: doorBreath 4.2s ease-in-out infinite;
}
.door-number { position: absolute; top: 2rem; left: 50%; transform: translateX(-50%); color: var(--candle-amber); font-family: var(--label-font); letter-spacing: .18em; }
.keyhole-cut { position: absolute; left: 50%; top: 47%; width: 3.2rem; height: 7.8rem; transform: translate(-50%, -50%); background: var(--abyss-velvet); clip-path: polygon(26% 0, 74% 0, 88% 33%, 61% 49%, 61% 100%, 39% 100%, 39% 49%, 12% 33%); box-shadow: 0 0 30px rgba(216,154,61,.8); }
.door-shadow { position: absolute; inset: 1.4rem; border: 1px solid rgba(216,154,61,.18); border-radius: inherit; }
.final-note { left: 7vw; bottom: 8vh; width: min(31rem, 68vw); transform: rotate(2deg); }
.door-message { color: var(--ink-wine); font-style: italic; }
.black-feather { position: absolute; right: 18vw; bottom: 15vh; width: 14rem; height: 2.5rem; background: linear-gradient(90deg, transparent, #030205 20% 80%, transparent); border-radius: 100% 0 100% 0; transform: rotate(-28deg); filter: drop-shadow(0 13px 20px rgba(0,0,0,.8)); }

@keyframes dustDrift { to { background-position: 137px 173px, -211px 197px, 163px -229px; } }
@keyframes keyholeWaver { 0%,100% { transform: scale(.96); opacity: .9; } 50% { transform: scale(1.08); opacity: 1; } }
@keyframes candleFlicker { 0%,100% { opacity: .6; transform: scale(1); } 35% { opacity: .86; transform: scale(1.08) translateY(-1%); } 62% { opacity: .48; transform: scale(.94); } }
@keyframes planchetteFloat { 0%,100% { transform: translateY(0) rotate(8deg); } 50% { transform: translateY(1.4rem) rotate(-4deg); } }
@keyframes drawClue { to { stroke-dashoffset: 0; } }
@keyframes doorBreath { 0%,100% { transform: translate(-50%, -50%) scaleX(1) scaleY(1); filter: brightness(.92); } 50% { transform: translate(-50%, -50%) scaleX(1.025) scaleY(.992); filter: brightness(1.12); } }

@media (max-width: 760px) {
    .keyhole-nav { right: 1rem; }
    .paper-clue { width: 78vw; }
    .tilt-b { left: 18vw; top: 48vh; }
    .mirror-fracture.small { left: 25vw; top: 48vh; width: 58vw; }
    .planchette { right: 8vw; top: 58vh; width: 12rem; height: 8rem; }
    .final-note { left: 5vw; bottom: 4vh; }
}