:root {
    --kiln-black: #1A1714;
    --earth-dark: #2C2620;
    --raw-clay: #3D3529;
    --pale-clay: #C4B8A8;
    --weathered-stone: #8A7B6B;
    --kiln-gold: #B8944F;
    --celadon-mist: #7A9E8E;
    --ember-rust: #A0634B;

    --font-heading: 'Cormorant Infant', serif;
    --font-jp: 'Noto Serif JP', serif;
    --font-body: 'IBM Plex Sans', sans-serif;

    --ease-out: cubic-bezier(0.33, 1, 0.68, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--kiln-black);
    color: var(--pale-clay);
    font-family: var(--font-body);
    font-weight: 300;
    font-size: clamp(0.95rem, 1.2vw, 1.1rem);
    line-height: 1.8;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ===== Dust Canvas ===== */
.dust-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

/* ===== Grain Overlay ===== */
.grain-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
    opacity: 0.07;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3CfeColorMatrix type='saturate' values='0.1'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23grain)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    transition: opacity 300ms var(--ease-out);
}

.grain-overlay.active {
    opacity: 0.12;
}

/* ===== Crack System ===== */
.crack-system {
    position: fixed;
    top: 0;
    left: 40px;
    width: 160px;
    height: 100%;
    z-index: 5;
    pointer-events: none;
}

.crack-line {
    fill: none;
    stroke: var(--kiln-gold);
    stroke-width: 1;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.crack-deco {
    opacity: 0.3;
    stroke-dasharray: var(--crack-len, 800);
    stroke-dashoffset: var(--crack-len, 800);
    transition: stroke-dashoffset 2s var(--ease-out);
}

.crack-deco.drawn {
    stroke-dashoffset: 0;
}

.crack-progress {
    opacity: 0.5;
    stroke-dasharray: var(--progress-len, 5000);
    stroke-dashoffset: var(--progress-len, 5000);
}

/* ===== Vessel Silhouettes ===== */
.vessel-silhouettes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
}

.vessel-sil {
    position: absolute;
    opacity: 0.035;
}

.sil-vase {
    width: 200px;
    height: 340px;
    top: 10%;
    left: 8%;
}

.sil-bowl {
    width: 300px;
    height: 180px;
    top: 55%;
    left: 15%;
}

.sil-cup {
    width: 140px;
    height: 170px;
    top: 30%;
    left: 25%;
}

/* ===== Chambers (Sections) ===== */
.chamber {
    min-height: 100vh;
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    padding: 6rem 3rem;
}

.chamber-content {
    max-width: 560px;
}

.offset-right {
    margin-left: 55%;
}

/* ===== Chamber 1: Opening ===== */
.chamber-1 {
    background: var(--kiln-black);
}

.site-title {
    font-family: var(--font-heading);
    font-weight: 300;
    font-size: clamp(2.4rem, 5vw, 4rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--kiln-gold);
    line-height: 1.05;
    opacity: 0;
    transition: opacity 2s var(--ease-out);
}

.site-title.visible {
    opacity: 1;
}

.opening-text {
    margin-top: 2.5rem;
    color: var(--pale-clay);
    max-width: 38ch;
    opacity: 0;
    font-weight: 300;
    line-height: 1.9;
    transition: opacity 800ms var(--ease-out);
}

.opening-text.visible {
    opacity: 1;
}

/* ===== Marginal Japanese Characters ===== */
.marginal-jp {
    position: absolute;
    font-family: var(--font-jp);
    font-weight: 200;
    color: var(--weathered-stone);
    font-size: clamp(1rem, 2vw, 1.4rem);
    opacity: 0;
    transition: opacity 1200ms var(--ease-out);
    pointer-events: none;
    user-select: none;
}

.marginal-jp.visible {
    opacity: 0.5;
}

.jp-1 {
    left: 12%;
    top: 40%;
    transform: rotate(-2deg);
}

.jp-2 {
    left: 8%;
    top: 35%;
    transform: rotate(1.5deg);
}

.jp-3 {
    right: 10%;
    top: 20%;
    transform: rotate(-1deg);
}

.jp-4 {
    left: 10%;
    top: 55%;
    transform: rotate(2deg);
}

/* ===== Chamber 2: Philosophy ===== */
.chamber-2 {
    background: var(--earth-dark);
}

.shard {
    background: rgba(61, 53, 41, 0.6);
    border: 1px solid var(--raw-clay);
    padding: 2rem 2.2rem;
    margin-bottom: 2.5rem;
    max-width: 38ch;
    opacity: 0;
    transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
    position: relative;
}

.shard[data-reveal="left"] {
    transform: translateX(-20px);
    clip-path: polygon(0 0, 100% 2px, calc(100% - 3px) 100%, 4px 100%);
}

.shard[data-reveal="right"] {
    transform: translateX(15px);
    clip-path: polygon(3px 0, 100% 0, calc(100% - 2px) calc(100% - 4px), 0 100%);
}

.shard[data-reveal="up"] {
    transform: translateY(20px);
    clip-path: polygon(0 0, 100% 3px, calc(100% - 4px) 100%, 2px calc(100% - 2px));
}

.shard.revealed {
    opacity: 1;
    transform: translate(0, 0);
}

.shard-heading {
    font-family: var(--font-heading);
    font-weight: 300;
    font-size: clamp(1.2rem, 2vw, 1.5rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--kiln-gold);
    margin-bottom: 0.75rem;
    line-height: 1.2;
}

.shard-body {
    color: var(--pale-clay);
    max-width: 38ch;
    line-height: 1.8;
}

/* ===== Chamber 3: The Vessel ===== */
.chamber-3 {
    background: var(--kiln-black);
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.vessel-ring {
    position: absolute;
    width: 60vmin;
    height: 60vmin;
    left: 35%;
    top: 50%;
    transform: translate(-50%, -50%);
    animation: slowSpin 120s linear infinite;
    opacity: 0;
    transition: opacity 1200ms var(--ease-out);
}

.vessel-ring.visible {
    opacity: 1;
}

@keyframes slowSpin {
    to {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

.ring-svg {
    width: 100%;
    height: 100%;
}

.vessel-fragments {
    position: relative;
    z-index: 2;
    width: 100%;
    height: 100vh;
}

.v-frag {
    position: absolute;
    font-family: var(--font-heading);
    font-weight: 300;
    font-size: clamp(1.4rem, 3vw, 2.4rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--weathered-stone);
    opacity: 0;
    transition: opacity 800ms var(--ease-out);
}

.v-frag.visible {
    opacity: 0.7;
}

/* ===== Chamber 4: Timeline ===== */
.chamber-4 {
    background: var(--earth-dark);
    flex-direction: column;
    align-items: flex-start;
    padding-top: 8rem;
    padding-bottom: 8rem;
}

.chamber-heading {
    font-family: var(--font-heading);
    font-weight: 300;
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--kiln-gold);
    line-height: 1.1;
    margin-bottom: 3rem;
}

.timeline {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.timeline-entry {
    max-width: 38ch;
    margin-bottom: 2.5rem;
    padding: 1.2rem 1.5rem 1.2rem 1.8rem;
    border-left: 1px solid var(--ember-rust);
    opacity: 0;
    transform: scale(0.97);
    transition: opacity 500ms var(--ease-out), transform 500ms var(--ease-out);
    position: relative;
}

.timeline-entry::before {
    content: '';
    position: absolute;
    left: -3px;
    top: 1.4rem;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--ember-rust);
    opacity: 0.6;
}

.timeline-entry.revealed {
    opacity: 1;
    transform: scale(1);
}

.timeline-entry:hover {
    border-left-color: var(--kiln-gold);
}

.timeline-entry:hover .t-date {
    color: var(--kiln-gold);
}

.t-date {
    font-family: var(--font-heading);
    font-weight: 300;
    font-size: 1rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ember-rust);
    display: block;
    margin-bottom: 0.4rem;
    transition: color 300ms var(--ease-out);
}

.t-text {
    color: var(--pale-clay);
    max-width: 38ch;
    line-height: 1.8;
}

/* ===== Chamber 5: Closing ===== */
.chamber-5 {
    background: var(--kiln-black);
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.closing-content {
    text-align: center;
    position: relative;
    z-index: 2;
}

.closing-crack-convergence {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(80vw, 500px);
    height: min(80vw, 500px);
    z-index: 1;
    pointer-events: none;
}

.convergence-svg {
    width: 100%;
    height: 100%;
}

.convergence-line {
    fill: none;
    stroke: var(--kiln-gold);
    stroke-width: 0.8;
    opacity: 0;
    stroke-dasharray: var(--conv-len, 600);
    stroke-dashoffset: var(--conv-len, 600);
    transition: opacity 800ms var(--ease-out), stroke-dashoffset 2s var(--ease-out);
}

.convergence-line.drawn {
    opacity: 0.35;
    stroke-dashoffset: 0;
}

.closing-kanji {
    font-family: var(--font-jp);
    font-weight: 200;
    font-size: clamp(8rem, 15vw, 14rem);
    color: var(--kiln-gold);
    opacity: 0;
    display: block;
    line-height: 1;
    position: relative;
    z-index: 3;
    transition: opacity 1200ms var(--ease-out);
}

.closing-kanji.visible {
    opacity: 0.6;
}

.closing-name {
    font-family: var(--font-heading);
    font-weight: 300;
    font-size: 1rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--weathered-stone);
    display: block;
    margin-top: 1.5rem;
    position: relative;
    z-index: 3;
    opacity: 0;
    transition: opacity 800ms var(--ease-out) 400ms;
}

.closing-name.visible {
    opacity: 1;
}

/* ===== Background transition between chambers ===== */
.chamber-1,
.chamber-3,
.chamber-5 {
    background: var(--kiln-black);
}

.chamber-2,
.chamber-4 {
    background: var(--earth-dark);
}

/* Gradient wipe between chambers */
.chamber-2::before {
    content: '';
    position: absolute;
    top: -120px;
    left: 0;
    width: 100%;
    height: 120px;
    background: linear-gradient(to bottom, var(--kiln-black), var(--earth-dark));
    pointer-events: none;
}

.chamber-3::before {
    content: '';
    position: absolute;
    top: -120px;
    left: 0;
    width: 100%;
    height: 120px;
    background: linear-gradient(to bottom, var(--earth-dark), var(--kiln-black));
    pointer-events: none;
}

.chamber-4::before {
    content: '';
    position: absolute;
    top: -120px;
    left: 0;
    width: 100%;
    height: 120px;
    background: linear-gradient(to bottom, var(--kiln-black), var(--earth-dark));
    pointer-events: none;
}

.chamber-5::before {
    content: '';
    position: absolute;
    top: -120px;
    left: 0;
    width: 100%;
    height: 120px;
    background: linear-gradient(to bottom, var(--earth-dark), var(--kiln-black));
    pointer-events: none;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .offset-right {
        margin-left: 10%;
    }

    .chamber-heading {
        margin-left: 0;
    }

    .chamber-content {
        max-width: 90%;
    }

    .vessel-ring {
        left: 50%;
        width: 80vmin;
        height: 80vmin;
    }

    .crack-system {
        left: 15px;
        width: 80px;
    }

    .vessel-silhouettes {
        display: none;
    }

    .marginal-jp {
        display: none;
    }

    .shard {
        max-width: none;
    }

    .timeline-entry {
        max-width: none;
    }

    .chamber {
        padding: 4rem 1.5rem;
    }

    .closing-crack-convergence {
        width: 90vw;
        height: 90vw;
    }
}

@media (max-width: 480px) {
    .offset-right {
        margin-left: 5%;
    }

    .site-title {
        font-size: clamp(1.8rem, 8vw, 2.6rem);
    }
}