:root {
    --chalk: #101014;
    --mint: #B9E6CF;
    --oxblood: #7B1E2B;
    --brass: #B08D57;
    --slate: #3E5363;
    --parchment: #F3EAD2;
    --display: "Literata", serif;
    --interface: "Recursive", sans-serif;
    --reflective: "Cormorant Garamond", serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    color: var(--parchment);
    background: var(--chalk);
    font-family: var(--display);
    overflow-x: hidden;
}

.grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 20;
    opacity: .32;
    background-image:
        radial-gradient(circle at 20% 30%, rgba(243, 234, 210, .08) 0 1px, transparent 1px),
        radial-gradient(circle at 80% 70%, rgba(176, 141, 87, .07) 0 1px, transparent 1px),
        linear-gradient(115deg, transparent 0 48%, rgba(185, 230, 207, .025) 50%, transparent 52%);
    background-size: 19px 23px, 31px 37px, 100% 100%;
    mix-blend-mode: screen;
}

.thread-map {
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 3;
    opacity: .95;
}

.thread-map path {
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
}

#redThread { stroke: var(--oxblood); stroke-width: 4; filter: drop-shadow(0 0 8px rgba(123, 30, 43, .65)); }
#goldThread { stroke: var(--brass); stroke-width: 2; opacity: .65; }

.chamber {
    position: relative;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: 8vmin;
    isolation: isolate;
    overflow: hidden;
    background:
        radial-gradient(circle at 12% 16%, rgba(62, 83, 99, .42), transparent 34%),
        radial-gradient(circle at 88% 84%, rgba(123, 30, 43, .24), transparent 30%),
        var(--chalk);
}

.chamber::before {
    content: "";
    position: absolute;
    inset: 5vmin;
    border: 1px solid rgba(243, 234, 210, .12);
    transform: skew(-1deg, .5deg);
}

.lamp {
    position: absolute;
    width: 62vmin;
    height: 62vmin;
    left: 45%;
    top: 4%;
    transform: translateX(-50%);
    border-radius: 50%;
    background: radial-gradient(circle, rgba(243, 234, 210, .74) 0 8%, rgba(243, 234, 210, .34) 20%, rgba(176, 141, 87, .16) 42%, transparent 72%);
    filter: blur(1px);
    animation: lampBreathe 7s ease-in-out infinite;
}

.annotation-rail {
    position: absolute;
    top: 14vh;
    width: 12rem;
    display: grid;
    gap: .6rem;
    font-family: var(--interface);
    color: var(--mint);
    letter-spacing: .12em;
    text-transform: uppercase;
    z-index: 5;
}

.annotation-rail span { font-size: .72rem; color: var(--brass); }
.annotation-rail b { font-size: .82rem; font-weight: 520; }
.left-rail { left: 5vmin; border-left: 1px solid var(--brass); padding-left: 1rem; }
.right-rail { right: 5vmin; border-right: 1px solid var(--brass); padding-right: 1rem; text-align: right; }

.vellum-sheet, .drafting-table, .cabinet, .loom-frame, .mirror, .conclusion-page {
    position: relative;
    z-index: 4;
}

.vellum-sheet {
    width: min(760px, 72vw);
    min-height: 58vh;
    margin-left: 9vw;
    padding: clamp(2rem, 5vw, 5rem);
    color: var(--chalk);
    background: linear-gradient(135deg, rgba(243, 234, 210, .98), rgba(243, 234, 210, .76));
    box-shadow: 0 38px 100px rgba(0, 0, 0, .55), inset 0 0 35px rgba(176, 141, 87, .18);
    transform: rotate(-2deg);
}

.vellum-sheet::after {
    content: "";
    position: absolute;
    inset: 1.2rem;
    border: 1px solid rgba(62, 83, 99, .28);
}

.press-mark, .logic-slip span, .claim-plate span {
    font-family: var(--interface);
    text-transform: uppercase;
    letter-spacing: .16em;
    color: var(--oxblood);
    font-size: .76rem;
}

h1, h2 { margin: 0; font-family: var(--display); font-weight: 500; line-height: .95; }
h1 { max-width: 11ch; margin-top: 1.8rem; font-size: clamp(3.8rem, 10vw, 8.6rem); letter-spacing: -.06em; }
h2 { font-size: clamp(3rem, 8vw, 7.6rem); letter-spacing: -.055em; }
p { max-width: 39rem; font-size: clamp(1.1rem, 2vw, 1.55rem); line-height: 1.55; }

.premise-trigger, .drawer-handle, .studio-link {
    display: inline-flex;
    border: 1px solid var(--brass);
    padding: .9rem 1.15rem;
    background: rgba(16, 16, 20, .88);
    color: var(--parchment);
    font-family: var(--interface);
    letter-spacing: .08em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    transition: transform .3s ease, background .3s ease, color .3s ease;
}

.premise-trigger:hover, .drawer-handle:hover, .studio-link:hover { transform: translateY(-3px); background: var(--oxblood); }

.loose-thread {
    position: absolute;
    right: -8vw;
    bottom: 15%;
    width: 18vw;
    height: 5rem;
    border-bottom: 4px solid var(--oxblood);
    border-radius: 50%;
    transform: rotate(-14deg);
}

.premise-slip {
    position: absolute;
    right: 13vw;
    bottom: 17vh;
    z-index: 6;
    width: min(360px, 42vw);
    padding: 1.3rem;
    color: var(--chalk);
    background: var(--parchment);
    box-shadow: 0 22px 45px rgba(0,0,0,.38);
    transform: translateX(38vw) rotate(9deg);
    opacity: 0;
    transition: transform .8s cubic-bezier(.19, 1, .22, 1), opacity .5s ease;
}

.premise-slip span { font-family: var(--interface); color: var(--oxblood); text-transform: uppercase; letter-spacing: .12em; font-size: .72rem; }
.premise-slip b { display: block; margin-top: .7rem; font-size: 1.2rem; }
.started .premise-slip { opacity: 1; transform: translateX(0) rotate(3deg); }

.inference-wheel {
    position: absolute;
    right: 9vw;
    top: 22vh;
    z-index: 4;
    width: 12rem;
    height: 12rem;
    border: 2px solid var(--brass);
    border-radius: 50%;
    color: var(--brass);
    transition: transform .8s cubic-bezier(.19, 1, .22, 1);
}
.inference-wheel::before { content: ""; position: absolute; inset: 1.8rem; border: 1px solid rgba(176,141,87,.45); border-radius: 50%; }
.inference-wheel i { position: absolute; font-family: var(--interface); font-style: normal; }
.inference-wheel i:nth-child(1) { top: 1rem; left: 5.1rem; }
.inference-wheel i:nth-child(2) { right: 1rem; top: 5.2rem; }
.inference-wheel i:nth-child(3) { bottom: 1rem; left: 4.2rem; }
.inference-wheel i:nth-child(4) { left: 1rem; top: 5.2rem; }
.started .inference-wheel { transform: rotate(34deg); }

.drafting-table {
    width: min(980px, 82vw);
    min-height: 62vh;
    padding: 4rem;
    background: linear-gradient(155deg, rgba(62, 83, 99, .68), rgba(16, 16, 20, .72));
    border: 1px solid rgba(176, 141, 87, .42);
    transform: rotate(1deg);
}
.table-edge { position: absolute; inset: 1rem; border: 2px double rgba(243,234,210,.18); }
.if-slips { display: flex; gap: 1rem; flex-wrap: wrap; margin-top: 3rem; }
.logic-slip {
    width: 15rem;
    min-height: 12rem;
    padding: 1.2rem;
    color: var(--chalk);
    background: var(--parchment);
    transform: rotate(var(--tilt, -3deg));
    box-shadow: 0 18px 38px rgba(0,0,0,.36);
}
.logic-slip:nth-child(2) { --tilt: 4deg; margin-top: 2rem; }
.logic-slip:nth-child(3) { --tilt: -1deg; }
.logic-slip strong { display: block; margin: 1rem 0 .5rem; font-size: 1.45rem; }
.logic-slip em { font-family: var(--reflective); font-size: 1.35rem; color: var(--slate); }
.brass-arm { position: absolute; right: 5rem; top: 8rem; width: 20rem; height: .35rem; background: var(--brass); transform-origin: right center; transform: rotate(-24deg); box-shadow: 0 0 0 8px rgba(176,141,87,.12); }

.cabinet {
    width: min(680px, 78vw);
    margin-right: 23vw;
    padding: 3rem;
    border: 1px solid rgba(176,141,87,.5);
    background: repeating-linear-gradient(90deg, rgba(62,83,99,.42), rgba(62,83,99,.42) 1rem, rgba(16,16,20,.75) 1rem, rgba(16,16,20,.75) 2rem);
}
.drawer { margin-top: 1rem; max-width: 28rem; height: 0; overflow: hidden; padding: 0 1rem; background: var(--oxblood); color: var(--parchment); font-family: var(--reflective); font-size: 1.8rem; transition: height .65s ease, padding .65s ease; }
.drawer.open { height: 7rem; padding: 1.4rem 1rem; }
.claim-plate {
    position: absolute;
    right: 10vw;
    top: 28vh;
    width: 24rem;
    min-height: 18rem;
    padding: 2rem;
    color: var(--chalk);
    background: radial-gradient(circle at 30% 20%, #fff8e8, var(--parchment) 65%);
    border-radius: 46% 54% 49% 51%;
    box-shadow: 0 25px 60px rgba(0,0,0,.5);
}
.claim-plate b { display: block; margin-top: 1rem; font-size: 2rem; }
.crack { position: absolute; width: 2px; height: 0; background: var(--oxblood); transform-origin: top; transition: height .6s ease; }
.crack-one { top: 30%; left: 49%; transform: rotate(24deg); }
.crack-two { top: 47%; left: 55%; transform: rotate(-38deg); }
.cracked .crack-one { height: 8rem; }
.cracked .crack-two { height: 5rem; }
.venn-shadow { position: absolute; left: 12vw; bottom: 12vh; width: 20rem; height: 12rem; opacity: .45; }
.venn-shadow i { position: absolute; width: 10rem; height: 10rem; border: 1px solid var(--mint); border-radius: 50%; }
.venn-shadow i:nth-child(2) { left: 5rem; border-color: var(--brass); }
.venn-shadow i:nth-child(3) { left: 2.5rem; top: 2rem; border-color: var(--oxblood); }

.loom-frame {
    width: min(1000px, 86vw);
    min-height: 70vh;
    padding: 3rem;
    border: 8px solid rgba(176,141,87,.72);
    background: rgba(16,16,20,.52);
}
.eyelet-row { display: flex; justify-content: space-around; margin: 1.8rem 0; }
.eyelet-row i { width: 1rem; height: 1rem; border-radius: 50%; background: var(--brass); box-shadow: inset 0 0 0 3px rgba(16,16,20,.5), 0 0 20px rgba(176,141,87,.45); }
.loom-threads { position: relative; height: 18rem; margin: 1rem 0; }
.loom-threads span { position: absolute; top: 0; left: 50%; width: 2px; height: 20rem; background: var(--mint); transform-origin: top; opacity: .75; }
.loom-threads span:nth-child(1) { transform: translateX(-18rem) rotate(32deg); background: var(--oxblood); }
.loom-threads span:nth-child(2) { transform: translateX(-10rem) rotate(-18deg); }
.loom-threads span:nth-child(3) { transform: translateX(-2rem) rotate(9deg); background: var(--brass); }
.loom-threads span:nth-child(4) { transform: translateX(6rem) rotate(-29deg); }
.loom-threads span:nth-child(5) { transform: translateX(14rem) rotate(19deg); background: var(--oxblood); }
.loom-threads span:nth-child(6) { transform: translateX(20rem) rotate(-9deg); background: var(--brass); }
.knot { position: absolute; left: 50%; bottom: 10rem; transform: translateX(-50%) scale(.75); width: 8rem; height: 8rem; border-radius: 50%; display: grid; place-items: center; background: var(--oxblood); font-family: var(--interface); text-transform: uppercase; letter-spacing: .1em; transition: transform .5s ease; }
.woven .knot { transform: translateX(-50%) scale(1.08) rotate(8deg); }

.mirror {
    width: min(740px, 76vw);
    min-height: 64vh;
    padding: 5rem 4rem;
    border-radius: 50% 50% 45% 45%;
    border: 2px solid var(--brass);
    background: linear-gradient(120deg, rgba(185,230,207,.24), rgba(62,83,99,.66), rgba(16,16,20,.86));
    text-align: center;
    box-shadow: inset 0 0 80px rgba(185,230,207,.12), 0 24px 80px rgba(0,0,0,.5);
}
.mirror-sheen { position: absolute; inset: 7%; border-radius: inherit; background: linear-gradient(110deg, transparent 20%, rgba(243,234,210,.18), transparent 46%); transform: translateX(-35%); transition: transform .8s ease; }
.mirror.seen .mirror-sheen { transform: translateX(35%); }
.reflected { margin: 2rem auto; font-family: var(--reflective); font-size: clamp(2rem, 5vw, 4.2rem); line-height: 1.05; }
.marginalia { font-family: var(--interface); color: var(--mint); letter-spacing: .12em; text-transform: uppercase; }
.proof-fan { position: absolute; right: 10vw; bottom: 9vh; width: 18rem; height: 18rem; }
.proof-fan span { position: absolute; inset: 3rem; background: var(--parchment); transform-origin: bottom left; box-shadow: 0 14px 30px rgba(0,0,0,.32); }
.proof-fan span:nth-child(1) { transform: rotate(-18deg); }
.proof-fan span:nth-child(2) { transform: rotate(-6deg); }
.proof-fan span:nth-child(3) { transform: rotate(8deg); }
.proof-fan span:nth-child(4) { transform: rotate(20deg); }

.conclusion-page {
    width: min(760px, 78vw);
    padding: 5rem;
    color: var(--chalk);
    background: var(--parchment);
    text-align: center;
    box-shadow: 0 30px 100px rgba(0,0,0,.6);
}
.seal { display: grid; place-items: center; width: 6rem; height: 6rem; margin: 0 auto 2rem; border-radius: 50%; background: var(--oxblood); color: var(--parchment); font-size: 3rem; }
.conclusion-page p { margin: 2rem auto; font-family: var(--reflective); font-size: clamp(1.8rem, 4vw, 3.2rem); line-height: 1.1; }

.in-view .logic-slip { animation: settle .8s ease both; }
.in-view .logic-slip:nth-child(2) { animation-delay: .12s; }
.in-view .logic-slip:nth-child(3) { animation-delay: .24s; }
.in-view .brass-arm { animation: measure 2.8s ease-in-out infinite alternate; }

@keyframes lampBreathe { 0%,100% { opacity: .86; transform: translateX(-50%) scale(1); } 50% { opacity: 1; transform: translateX(-50%) scale(1.05); } }
@keyframes settle { from { opacity: 0; transform: translateY(3rem) rotate(12deg); } }
@keyframes measure { from { transform: rotate(-28deg); } to { transform: rotate(-12deg); } }

@media (max-width: 760px) {
    .chamber { padding: 6rem 1.2rem; place-items: end center; }
    .annotation-rail { top: 2rem; width: auto; left: 1.2rem; right: auto; text-align: left; border-left: 1px solid var(--brass); border-right: 0; padding-left: 1rem; padding-right: 0; }
    .vellum-sheet, .drafting-table, .cabinet, .loom-frame, .mirror, .conclusion-page { width: 100%; margin: 0; padding: 2rem; }
    .premise-slip, .claim-plate { position: relative; right: auto; top: auto; bottom: auto; width: 100%; margin-top: 1rem; }
    .inference-wheel { width: 8rem; height: 8rem; right: 1rem; top: 7rem; }
    .if-slips { display: grid; }
    .brass-arm, .proof-fan { display: none; }
    .loom-threads { transform: scale(.65); }
}