:root {
    --sand: #F1E7C8;
    --sage: #A7B8A0;
    --bark: #8A5A32;
    --lichen: #D7C84F;
    --moss: #3F6B3A;
    --ink: #08110C;
    --deep: #102B1E;
    --teal: #3D8B7A;
    --title-font: "Fraunces", serif;
    --body-font: "Atkinson Hyperlegible", "Lato", sans-serif;
    --mono-font: "IBM Plex Mono", monospace;
    --ui-font: "Inter", sans-serif;
    --scribble-font: "Caveat", cursive;
    --typography-note: "IBM Plex Mono only for specimen labels";
    --terrain-note: "Interaction is tactile and terrain-based—temporary cursor footprints";
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--ink);
    color: var(--sand);
    font-family: var(--body-font);
    overflow-x: hidden;
}

.grain-field {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 4;
    opacity: .32;
    background-image:
        radial-gradient(circle at 18% 24%, rgba(241,231,200,.12) 0 1px, transparent 1.6px),
        radial-gradient(circle at 72% 61%, rgba(138,90,50,.18) 0 1px, transparent 1.8px),
        linear-gradient(115deg, transparent, rgba(167,184,160,.05), transparent);
    background-size: 37px 41px, 53px 47px, 100% 100%;
    mix-blend-mode: overlay;
}

.trail-thread {
    position: absolute;
    top: 0;
    left: 50%;
    width: min(88vw, 1000px);
    height: 600vh;
    transform: translateX(-50%);
    z-index: 2;
    pointer-events: none;
    filter: drop-shadow(0 0 9px rgba(215,200,79,.18));
}

.trail-thread path {
    fill: none;
    stroke: var(--lichen);
    stroke-width: 5;
    stroke-linecap: round;
    stroke-dasharray: 1;
    stroke-dashoffset: 1;
    opacity: .78;
}

.transect-scene {
    min-height: 100vh;
    position: relative;
    display: grid;
    place-items: center;
    overflow: hidden;
    padding: clamp(28px, 6vw, 92px);
    isolation: isolate;
}

.transect-scene::before,
.transect-scene::after {
    content: "";
    position: absolute;
    inset: -20%;
    z-index: -2;
    pointer-events: none;
}

.scene-map {
    background:
        radial-gradient(circle at 50% 56%, rgba(138,90,50,.52), transparent 31%),
        radial-gradient(circle at 20% 12%, rgba(61,139,122,.18), transparent 33%),
        linear-gradient(180deg, #08110C 0%, #102B1E 62%, #08110C 100%);
}

.scene-map::before {
    background: repeating-radial-gradient(ellipse at 50% 48%, transparent 0 28px, rgba(167,184,160,.12) 30px 32px);
    transform: rotate(-9deg);
}

.contour-map {
    position: absolute;
    inset: 7%;
    border: 1px solid rgba(167,184,160,.17);
    border-radius: 48% 52% 44% 56%;
    background:
        radial-gradient(ellipse at center, transparent 0 18%, rgba(241,231,200,.08) 18.3% 18.8%, transparent 19.2% 30%, rgba(241,231,200,.07) 30.4% 31%, transparent 31.5%),
        repeating-radial-gradient(ellipse at center, transparent 0 54px, rgba(215,200,79,.08) 56px 58px);
    opacity: .72;
}

.dew-layer {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--x, 50%) var(--y, 50%), rgba(241,231,200,.28), rgba(215,200,79,.13) 8%, transparent 22%);
    transition: background-position .2s linear;
    mix-blend-mode: screen;
}

.hero-press { text-align: center; max-width: 980px; z-index: 3; }

.field-note,
.scribble {
    font-family: var(--scribble-font);
    color: var(--lichen);
    font-size: clamp(1.4rem, 3vw, 2.6rem);
    margin: 0 0 .4em;
    transform: rotate(-2deg);
}

.mud-wordmark {
    font-family: var(--title-font);
    font-size: clamp(4.4rem, 14vw, 14rem);
    line-height: .78;
    letter-spacing: -.075em;
    margin: 0;
    color: var(--sand);
    text-shadow: 0 4px 0 #8A5A32, 0 18px 34px rgba(0,0,0,.62), 0 -1px 0 rgba(215,200,79,.35);
    filter: url(#none);
}

.mud-subtitle {
    max-width: 650px;
    margin: 2.4rem auto 0;
    font-size: clamp(1.05rem, 2vw, 1.45rem);
    color: rgba(241,231,200,.82);
}

.specimen-label,
.core-grip {
    font-family: var(--mono-font);
    font-size: .72rem;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--lichen);
}

.map-label { position: absolute; top: 34px; left: 34px; z-index: 3; }

.walk-cue,
.mud-link,
.root-knot-grid button {
    border: 1px solid rgba(241,231,200,.35);
    background: rgba(16,43,30,.72);
    color: var(--sand);
    font-family: var(--ui-font);
    text-transform: uppercase;
    letter-spacing: .12em;
    padding: 14px 20px;
    border-radius: 999px;
    cursor: pointer;
    transition: transform .3s ease, background .3s ease, border-color .3s ease;
}

.walk-cue { position: absolute; bottom: 36px; z-index: 5; }
.walk-cue:hover, .mud-link:hover, .root-knot-grid button:hover { transform: translateY(-4px); background: rgba(63,107,58,.88); border-color: var(--lichen); }

.track-sequence { position: absolute; width: 310px; height: 430px; right: 10vw; bottom: 12vh; opacity: .7; transform: rotate(21deg); }
.track-sequence span,
.final-tracks span {
    position: absolute;
    width: 42px;
    height: 72px;
    border-radius: 52% 48% 62% 38%;
    background: radial-gradient(circle at 55% 24%, rgba(8,17,12,.75), rgba(138,90,50,.62));
    box-shadow: inset 0 9px 14px rgba(0,0,0,.45), 0 0 22px rgba(215,200,79,.12);
}
.track-sequence span:nth-child(1) { left: 20px; top: 20px; }
.track-sequence span:nth-child(2) { left: 115px; top: 86px; transform: rotate(16deg); }
.track-sequence span:nth-child(3) { left: 55px; top: 154px; transform: rotate(-9deg); }
.track-sequence span:nth-child(4) { left: 160px; top: 230px; transform: rotate(14deg); }
.track-sequence span:nth-child(5) { left: 92px; top: 302px; transform: rotate(-12deg); }
.track-sequence span:nth-child(6) { left: 205px; top: 365px; transform: rotate(11deg); }

.scene-litter { background: linear-gradient(150deg, #102B1E, #08110C 54%, #3F6B3A); }
.scene-litter::before { background: radial-gradient(circle at 16% 20%, rgba(167,184,160,.18), transparent 17%), radial-gradient(circle at 78% 77%, rgba(138,90,50,.45), transparent 28%); }

.leaf-shadow {
    position: absolute;
    inset: 0;
    background-image: linear-gradient(35deg, transparent 48%, rgba(167,184,160,.1) 49% 51%, transparent 52%), radial-gradient(ellipse at 30% 20%, rgba(215,200,79,.08), transparent 22%);
    background-size: 140px 70px, 100% 100%;
    animation: driftLeaf 13s ease-in-out infinite alternate;
}

.specimen-vellum,
.exchange-seal {
    width: min(650px, 88vw);
    padding: clamp(25px, 5vw, 56px);
    background: linear-gradient(135deg, rgba(241,231,200,.92), rgba(167,184,160,.78));
    color: var(--deep);
    border: 1px solid rgba(138,90,50,.5);
    box-shadow: 0 28px 80px rgba(0,0,0,.42);
    position: relative;
    z-index: 3;
    border-radius: 32px 18px 42px 20px;
}

.specimen-vellum::after {
    content: "";
    position: absolute;
    inset: 13px;
    border: 1px dashed rgba(138,90,50,.32);
    border-radius: inherit;
    pointer-events: none;
}

.specimen-vellum h2,
.exchange-seal h2 {
    font-family: var(--title-font);
    font-size: clamp(2.3rem, 5vw, 5rem);
    line-height: .94;
    margin: .25em 0;
    color: var(--ink);
    letter-spacing: -.045em;
}

.specimen-vellum p,
.exchange-seal p { font-size: clamp(1rem, 1.45vw, 1.25rem); line-height: 1.62; }
.offset-left { margin-right: min(28vw, 360px); transform: rotate(-1.4deg); }
.offset-right { margin-left: min(28vw, 360px); transform: rotate(1.6deg); }

.pressed-leaf {
    position: absolute;
    width: 230px;
    height: 390px;
    border-radius: 4% 88% 8% 90%;
    background: linear-gradient(90deg, rgba(215,200,79,.28), rgba(63,107,58,.58));
    right: 14vw;
    top: 12vh;
    transform: rotate(34deg);
    filter: blur(.2px) drop-shadow(0 24px 30px rgba(0,0,0,.28));
}
.pressed-leaf::before { content: ""; position: absolute; left: 50%; top: 0; width: 2px; height: 100%; background: rgba(241,231,200,.28); }

.broker-mark {
    position: absolute;
    left: 14vw;
    bottom: 12vh;
    width: 180px;
    height: 110px;
    border: 2px solid rgba(215,200,79,.42);
    border-radius: 50%;
    transform: rotate(-12deg);
}
.broker-mark::before, .broker-mark::after { content: ""; position: absolute; width: 62px; height: 92px; background: rgba(138,90,50,.54); border-radius: 50% 45% 60% 42%; top: 10px; }
.broker-mark::before { left: 34px; transform: rotate(-18deg); }
.broker-mark::after { right: 28px; transform: rotate(24deg); background: rgba(61,139,122,.46); }

.scene-river { background: linear-gradient(180deg, #102B1E, #3D8B7A 45%, #08110C); }
.watershed-rings { position: absolute; inset: 0; background: repeating-radial-gradient(ellipse at 68% 42%, transparent 0 42px, rgba(241,231,200,.13) 44px 46px); opacity: .7; }

.soil-core-panel {
    position: absolute;
    left: 8vw;
    bottom: 12vh;
    width: min(330px, 82vw);
    border-radius: 160px;
    overflow: hidden;
    border: 4px solid rgba(241,231,200,.38);
    box-shadow: 0 24px 70px rgba(0,0,0,.48);
    z-index: 5;
    cursor: grab;
    user-select: none;
    transition: box-shadow .2s ease;
}
.soil-core-panel.dragging { cursor: grabbing; box-shadow: 0 34px 95px rgba(0,0,0,.62); }
.core-grip { background: #08110C; padding: 14px; text-align: center; }
.soil-stripe { min-height: 72px; display: grid; place-items: center; font-family: var(--mono-font); color: #08110C; text-transform: uppercase; letter-spacing: .1em; }
.soil-stripe.clay { background: #8A5A32; color: #F1E7C8; }
.soil-stripe.loam { background: #A7B8A0; }
.soil-stripe.root { background: #3F6B3A; color: #F1E7C8; }
.soil-stripe.ash { background: #D7C84F; }

.scene-root { background: radial-gradient(circle at 50% 55%, rgba(63,107,58,.44), transparent 35%), linear-gradient(135deg, #08110C, #102B1E); }
.mycelium-web { position: absolute; inset: 0; opacity: .7; }
.mycelium-web i { position: absolute; height: 2px; width: 65vw; background: linear-gradient(90deg, transparent, rgba(241,231,200,.3), transparent); transform-origin: left; }
.mycelium-web i:nth-child(1) { top: 18%; left: 5%; transform: rotate(21deg); }
.mycelium-web i:nth-child(2) { top: 32%; left: 15%; transform: rotate(-14deg); }
.mycelium-web i:nth-child(3) { top: 51%; left: 2%; transform: rotate(9deg); }
.mycelium-web i:nth-child(4) { top: 64%; left: 31%; transform: rotate(-26deg); }
.mycelium-web i:nth-child(5) { top: 78%; left: 12%; transform: rotate(17deg); }
.mycelium-web i:nth-child(6) { top: 44%; left: 48%; transform: rotate(38deg); }

.root-knot-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; margin-top: 25px; }
.root-knot-grid button { color: var(--sand); background: #102B1E; border-radius: 22px; padding: 16px; }
.knot-note { min-height: 54px; color: var(--bark); font-family: var(--mono-font); }

.scene-crossing { background: linear-gradient(90deg, #8A5A32, #102B1E 42%, #08110C); }
.stamp-field { position: absolute; inset: 0; background-image: radial-gradient(circle, rgba(215,200,79,.13) 0 2px, transparent 3px); background-size: 56px 56px; transform: rotate(-7deg); }
.exchange-seal { border-radius: 50%; aspect-ratio: 1; display: flex; flex-direction: column; justify-content: center; text-align: center; background: radial-gradient(circle, rgba(241,231,200,.92), rgba(138,90,50,.82)); color: var(--ink); }
.seal-row { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; font-family: var(--mono-font); font-size: .75rem; text-transform: uppercase; }
.seal-row span { border: 1px solid rgba(8,17,12,.35); border-radius: 999px; padding: 8px 10px; }
.cairn-stack { position: absolute; right: 12vw; bottom: 10vh; width: 190px; height: 220px; }
.cairn-stack b { position: absolute; left: 50%; transform: translateX(-50%); background: #A7B8A0; border-radius: 48%; box-shadow: inset 0 -12px 22px rgba(8,17,12,.33); }
.cairn-stack b:nth-child(1) { bottom: 0; width: 180px; height: 48px; }
.cairn-stack b:nth-child(2) { bottom: 43px; width: 135px; height: 58px; background: #8A5A32; }
.cairn-stack b:nth-child(3) { bottom: 95px; width: 96px; height: 48px; background: #3D8B7A; }
.cairn-stack b:nth-child(4) { bottom: 138px; width: 56px; height: 44px; background: #D7C84F; }

.scene-meadow { background: linear-gradient(180deg, #102B1E, #3F6B3A 55%, #A7B8A0); }
.lichen-bloom { position: absolute; inset: 0; background: radial-gradient(circle at 20% 70%, rgba(215,200,79,.45), transparent 9%), radial-gradient(circle at 65% 28%, rgba(241,231,200,.28), transparent 12%), radial-gradient(circle at 82% 68%, rgba(61,139,122,.36), transparent 11%); transform: scale(var(--bloom, .88)); transition: transform .4s ease; }
.meadow-panel { margin: 0 auto; text-align: center; transform: rotate(.7deg); }
.mud-link { display: inline-block; text-decoration: none; margin-top: 14px; }
.final-tracks { position: absolute; inset: auto 0 4vh 0; height: 160px; }
.final-tracks span:nth-child(1) { left: 28%; top: 30px; transform: rotate(-10deg); }
.final-tracks span:nth-child(2) { left: 41%; top: 76px; transform: rotate(13deg); }
.final-tracks span:nth-child(3) { left: 56%; top: 42px; transform: rotate(-8deg); }
.final-tracks span:nth-child(4) { left: 69%; top: 86px; transform: rotate(15deg); }

@keyframes driftLeaf { from { transform: translate3d(-18px, -10px, 0); } to { transform: translate3d(26px, 18px, 0); } }

@media (max-width: 760px) {
    .offset-left, .offset-right { margin: 0; }
    .soil-core-panel { position: relative; left: auto; bottom: auto; margin-top: 24px; }
    .scene-river { align-content: center; gap: 22px; }
    .exchange-seal { border-radius: 34px; aspect-ratio: auto; }
    .cairn-stack, .pressed-leaf, .broker-mark { opacity: .45; }
    .root-knot-grid { grid-template-columns: 1fr; }
}