/* ==========================================================================
   mybadge.page — Muji workshop, layered-depth, warm-earthy palette
   ========================================================================== */

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

:root {
    --c-cream: #F5EDE0;
    --c-text: #2C2419;
    --c-stone: #7A6B55;
    --c-amber: #C17F3E;
    --c-kiln: #6B4226;
    --c-sandstone: #C4B5A0;
    --c-clay: #EDE4D4;
    --c-rose: #D4926A;
    --c-dusk: #E8B87A;
    --c-gold: #F0D48E;
    --c-stone-mid: #8B7B5C;

    --font-display: "Space Grotesk", system-ui, -apple-system, sans-serif;
    --font-body: "Inter", system-ui, -apple-system, sans-serif;
    --font-mono: "DM Mono", ui-monospace, "SF Mono", Menlo, monospace;

    --rail-width: 48px;
}

html,
body {
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    background: var(--c-cream);
}

body {
    color: var(--c-text);
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.1vw, 1.125rem);
    line-height: 1.72;
    background: var(--c-cream);
    font-feature-settings: 'cv01' 1, 'cv02' 1;
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

p {
    margin: 0 0 1.5em;
}

/* ==========================================================================
   Background layer (z:0) — marble texture, drifts at 40% scroll speed
   ========================================================================== */

.bg-marble {
    position: fixed;
    inset: -10vh -10vw;
    z-index: 0;
    pointer-events: none;
    background-color: var(--c-cream);
    will-change: transform;
}

.marble-tile {
    position: absolute;
    inset: -20%;
    transform: rotate(15deg);
    background-color: var(--c-cream);
    background-image:
        radial-gradient(ellipse 380px 70px at 18% 22%, rgba(193, 127, 62, 0.10), transparent 70%),
        radial-gradient(ellipse 520px 90px at 82% 38%, rgba(193, 127, 62, 0.08), transparent 75%),
        radial-gradient(ellipse 280px 50px at 48% 58%, rgba(196, 181, 160, 0.18), transparent 70%),
        radial-gradient(ellipse 460px 80px at 22% 78%, rgba(139, 119, 92, 0.10), transparent 75%),
        radial-gradient(ellipse 340px 60px at 78% 88%, rgba(193, 127, 62, 0.07), transparent 70%),
        radial-gradient(circle at 32% 32%, rgba(240, 212, 142, 0.12), transparent 35%),
        radial-gradient(circle at 68% 68%, rgba(212, 146, 106, 0.08), transparent 40%),
        linear-gradient(116deg,
            transparent 0%, transparent 28%,
            rgba(196, 181, 160, 0.16) 28.4%, rgba(196, 181, 160, 0.16) 28.7%,
            transparent 29.1%, transparent 53%,
            rgba(193, 127, 62, 0.10) 53.3%, rgba(193, 127, 62, 0.10) 53.5%,
            transparent 53.8%, transparent 79%,
            rgba(122, 107, 85, 0.10) 79.3%, rgba(122, 107, 85, 0.10) 79.5%,
            transparent 79.8%),
        linear-gradient(74deg,
            transparent 0%, transparent 41%,
            rgba(196, 181, 160, 0.12) 41.4%, rgba(196, 181, 160, 0.12) 41.6%,
            transparent 42%, transparent 67%,
            rgba(193, 127, 62, 0.08) 67.3%, rgba(193, 127, 62, 0.08) 67.5%,
            transparent 67.8%);
    background-blend-mode: multiply, multiply, multiply, multiply, multiply, normal, normal, normal, normal;
    opacity: 0.85;
}

.marble-tile::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 12% 88%, rgba(255, 255, 255, 0.35), transparent 32%),
        radial-gradient(circle at 88% 12%, rgba(245, 237, 224, 0.28), transparent 38%);
    pointer-events: none;
}

/* ==========================================================================
   Foreground layer (z:2) — aurora drifts, blend mode soft-light
   ========================================================================== */

.fg-aurora {
    position: fixed;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    mix-blend-mode: soft-light;
    opacity: 0.06;
    transition: opacity 0.4s ease-out;
}

.aurora-blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    will-change: transform;
}

.aurora-blob--rose {
    width: 480px;
    height: 480px;
    top: 10%;
    left: 8%;
    background: radial-gradient(circle, var(--c-rose), transparent 70%);
    animation: drift-rose 52s ease-in-out infinite;
}

.aurora-blob--amber {
    width: 380px;
    height: 380px;
    top: 55%;
    right: 12%;
    background: radial-gradient(circle, var(--c-dusk), transparent 70%);
    animation: drift-amber 48s ease-in-out infinite;
}

.aurora-blob--gold {
    width: 320px;
    height: 320px;
    bottom: 12%;
    left: 35%;
    background: radial-gradient(circle, var(--c-gold), transparent 70%);
    animation: drift-gold 56s ease-in-out infinite;
}

@keyframes drift-rose {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(120px, 60px); }
    50% { transform: translate(180px, -40px); }
    75% { transform: translate(40px, -100px); }
}

@keyframes drift-amber {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-100px, 80px); }
    50% { transform: translate(-160px, -20px); }
    75% { transform: translate(-60px, -120px); }
}

@keyframes drift-gold {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(80px, -90px); }
    66% { transform: translate(-110px, 50px); }
}

/* ==========================================================================
   Left vertical navigation rail
   ========================================================================== */

.rail {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--rail-width);
    height: 100vh;
    z-index: 30;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
}

.rail-thread {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 1px;
    height: 240px;
    background: var(--c-sandstone);
    transform: translate(-50%, -50%);
    z-index: -1;
}

.rail-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--c-clay);
    border: 1px solid var(--c-sandstone);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: border-color 300ms ease, background 300ms ease;
}

.rail-dot__inner {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: transparent;
    transition: background 300ms ease;
}

.rail-dot.is-active {
    border-color: var(--c-amber);
    background: var(--c-cream);
}

.rail-dot.is-active .rail-dot__inner {
    background: var(--c-amber);
}

.rail-dot:hover {
    border-color: var(--c-kiln);
}

/* ==========================================================================
   Mid-ground content stage
   ========================================================================== */

.stage {
    position: relative;
    z-index: 1;
    width: 100%;
}

.chamber {
    position: relative;
    min-height: 120vh;
    padding: 14vh 6vw 14vh calc(var(--rail-width) + 6vw);
    display: flex;
    align-items: center;
}

.chamber-inner {
    position: relative;
    width: 100%;
    max-width: 880px;
    /* asymmetric left-bias (55% from left) */
    margin-left: 5vw;
    margin-right: auto;
}

.chamber-inner--right {
    margin-left: auto;
    margin-right: 5vw;
    max-width: 920px;
}

.chamber-inner--center {
    margin: 0 auto;
    max-width: 520px;
    text-align: center;
}

.ghost-numeral {
    position: absolute;
    top: 8vh;
    right: 4vw;
    font-family: var(--font-display);
    font-weight: 300;
    font-size: clamp(4rem, 8vw, 8rem);
    line-height: 1;
    color: var(--c-stone-mid);
    opacity: 0.06;
    letter-spacing: -0.04em;
    pointer-events: none;
    user-select: none;
}

/* Typography building blocks */

.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.16em;
    color: var(--c-stone);
    margin: 0 0 1.6em;
    text-transform: lowercase;
}

.display-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.75rem, 3.5vw, 3.25rem);
    letter-spacing: -0.02em;
    line-height: 1.15;
    color: var(--c-text);
    margin: 0 0 0.6em;
}

.section-title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.6rem, 3vw, 2.6rem);
    letter-spacing: -0.02em;
    line-height: 1.18;
    color: var(--c-text);
    margin: 0 0 0.6em;
}

.lede {
    font-size: clamp(1.05rem, 1.3vw, 1.25rem);
    line-height: 1.62;
    color: var(--c-text);
    max-width: 62ch;
    margin-bottom: 2.4em;
}

.caption {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    letter-spacing: 0.06em;
    color: var(--c-stone);
    margin: 2.2em 0 0;
    text-transform: lowercase;
}

.card-title {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(1.15rem, 1.8vw, 1.5rem);
    letter-spacing: -0.015em;
    line-height: 1.25;
    color: var(--c-text);
    margin: 0 0 0.8em;
}

.meta,
.step-id {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    color: var(--c-stone);
    text-transform: lowercase;
    margin: 0;
}

.step-id {
    margin-bottom: 1.2em;
}

.meta {
    margin-top: 1em;
    color: var(--c-stone-mid);
}

/* ==========================================================================
   Border-animate system (SVG strokes)
   ========================================================================== */

.border-animate {
    position: relative;
}

.border-svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: visible;
}

.border-rect {
    fill: none;
    stroke: var(--c-amber);
    stroke-width: 1.5;
    /* dasharray and offset are set via JS once dimensions are known */
    stroke-dasharray: 0 9999;
    stroke-dashoffset: 0;
    stroke-opacity: 0.85;
    transition: stroke 300ms ease;
}

.border-animate.is-drawn .border-rect {
    animation: border-pulse 4s ease-in-out infinite;
}

.border-animate:hover .border-rect {
    stroke: var(--c-kiln);
}

@keyframes border-pulse {
    0%, 100% { stroke-opacity: 0.6; }
    50% { stroke-opacity: 1; }
}

/* ==========================================================================
   Chamber 1: The Specimen Hall
   ========================================================================== */

.specimen-stage {
    position: relative;
    margin: 4em 0 1em;
    height: 360px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    perspective: 1200px;
}

.specimen-shadow {
    position: absolute;
    width: 280px;
    height: 60px;
    bottom: 30px;
    left: 30px;
    background: radial-gradient(ellipse, rgba(44, 36, 25, 0.22), transparent 65%);
    filter: blur(14px);
    z-index: 0;
}

.specimen-badge {
    position: relative;
    width: 320px;
    height: 320px;
    margin-left: 30px;
    z-index: 1;
    transform-style: preserve-3d;
    animation: specimen-rotate 20s linear infinite;
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    background: rgba(245, 237, 224, 0.35);
    border-radius: 50%;
}

.specimen-svg {
    width: 100%;
    height: 100%;
    display: block;
}

.specimen-ring {
    transform-origin: center;
    animation: ring-trace 8s ease-in-out infinite;
}

@keyframes specimen-rotate {
    0% { transform: rotateY(0deg); }
    100% { transform: rotateY(360deg); }
}

@keyframes ring-trace {
    0% { stroke-dashoffset: 628; opacity: 0.4; }
    50% { stroke-dashoffset: 0; opacity: 1; }
    100% { stroke-dashoffset: -628; opacity: 0.4; }
}

/* ==========================================================================
   Chamber 2: Assembly stack
   ========================================================================== */

.assembly-stack {
    margin-top: 2em;
    display: flex;
    flex-direction: column;
}

.assembly-card {
    background: var(--c-clay);
    border: 1px solid var(--c-sandstone);
    box-shadow: 0 8px 32px rgba(139, 119, 92, 0.12);
    margin-bottom: -2rem;
    transition: transform 400ms ease, box-shadow 400ms ease;
}

.assembly-card:nth-child(odd) {
    margin-left: 0;
    margin-right: 4rem;
}

.assembly-card:nth-child(even) {
    margin-left: 4rem;
    margin-right: 0;
}

.assembly-card:last-child {
    margin-bottom: 0;
}

.assembly-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(139, 119, 92, 0.18);
    z-index: 5;
}

.assembly-card__inner {
    padding: clamp(2rem, 4vw, 4rem);
    position: relative;
    z-index: 1;
}

/* ==========================================================================
   Chamber 3: Material Library swatch grid
   ========================================================================== */

.swatch-grid {
    margin-top: 2em;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.6rem;
    /* offset variation via translate */
}

.swatch {
    margin: 0;
    background: var(--c-clay);
    border: 1px solid var(--c-sandstone);
    box-shadow: 0 6px 24px rgba(139, 119, 92, 0.10);
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: transform 400ms ease;
}

.swatch:nth-child(2) { transform: translateY(28px); }
.swatch:nth-child(3) { transform: translateY(-16px); }
.swatch:nth-child(5) { transform: translateY(20px); }
.swatch:nth-child(6) { transform: translateY(-12px); }

.swatch:hover {
    transform: translateY(-4px);
}

.swatch:nth-child(2):hover { transform: translateY(28px) translateY(-4px); }
.swatch:nth-child(3):hover { transform: translateY(-16px) translateY(-4px); }
.swatch:nth-child(5):hover { transform: translateY(20px) translateY(-4px); }
.swatch:nth-child(6):hover { transform: translateY(-12px) translateY(-4px); }

.swatch-face {
    width: 100%;
    aspect-ratio: 1 / 1;
    border: 1px solid var(--c-sandstone);
    position: relative;
    overflow: hidden;
}

.swatch-face--matte {
    background:
        radial-gradient(circle at 30% 30%, rgba(245, 237, 224, 0.4), transparent 60%),
        var(--c-cream);
}

.swatch-face--gloss {
    background:
        linear-gradient(135deg, rgba(255, 255, 255, 0.6) 0%, transparent 35%, transparent 60%, rgba(193, 127, 62, 0.18) 100%),
        var(--c-clay);
}

.swatch-face--emboss {
    background:
        radial-gradient(circle at 50% 50%, var(--c-clay) 26%, transparent 27%),
        radial-gradient(circle at 50% 50%, transparent 30%, rgba(139, 119, 92, 0.18) 31%, rgba(139, 119, 92, 0.18) 33%, transparent 34%),
        radial-gradient(circle at 50% 50%, transparent 38%, rgba(122, 107, 85, 0.10) 39%, rgba(122, 107, 85, 0.10) 40%, transparent 41%),
        var(--c-cream);
}

.swatch-face--engrave {
    background:
        repeating-linear-gradient(45deg, transparent 0 10px, rgba(122, 107, 85, 0.18) 10px 11px),
        repeating-linear-gradient(-45deg, transparent 0 14px, rgba(122, 107, 85, 0.10) 14px 15px),
        var(--c-clay);
}

.swatch-face--fabric {
    background:
        repeating-linear-gradient(0deg, rgba(122, 107, 85, 0.10) 0 1px, transparent 1px 3px),
        repeating-linear-gradient(90deg, rgba(122, 107, 85, 0.10) 0 1px, transparent 1px 3px),
        var(--c-clay);
}

.swatch-face--metallic {
    background:
        linear-gradient(125deg,
            #d8a868 0%, #f0d48e 30%, #c17f3e 50%, #f0d48e 70%, #b8854a 100%);
    opacity: 0.85;
}

.swatch-name {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    color: var(--c-text);
    margin: 0 0 0.2em;
}

.swatch-meta {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.06em;
    color: var(--c-stone);
    margin: 0;
    text-transform: lowercase;
}

/* ==========================================================================
   Chamber 4: Provenance thread
   ========================================================================== */

.thread {
    position: relative;
    margin-top: 3em;
    padding: 2em 0;
}

.thread-line {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: 1px;
    background: var(--c-stone-mid);
    transform: translateX(-50%);
}

.thread-node {
    position: relative;
    width: 46%;
    background: var(--c-clay);
    border: 1px solid var(--c-sandstone);
    box-shadow: 0 8px 28px rgba(139, 119, 92, 0.12);
    padding: clamp(1.4rem, 2.5vw, 2.2rem);
    margin-bottom: 3rem;
}

.thread-node--left {
    margin-right: auto;
    margin-left: 0;
}

.thread-node--right {
    margin-left: auto;
    margin-right: 0;
}

.thread-marker {
    position: absolute;
    top: 24px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--c-amber);
    border: 2px solid var(--c-cream);
    box-shadow: 0 0 0 1px var(--c-stone-mid);
}

.thread-node--left .thread-marker {
    right: -32px;
    transform: translateX(50%);
}

.thread-node--right .thread-marker {
    left: -32px;
    transform: translateX(-50%);
}

.thread-time {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    color: var(--c-amber);
    margin: 0 0 0.8em;
    text-transform: lowercase;
}

/* ==========================================================================
   Chamber 5: Quiet exit
   ========================================================================== */

.chamber--exit {
    min-height: 100vh;
    align-items: center;
    justify-content: center;
}

.exit-badge {
    width: 80px;
    height: 80px;
    margin: 0 auto 2em;
    opacity: 0.75;
}

.exit-text {
    font-family: var(--font-display);
    font-weight: 500;
    font-size: clamp(1.2rem, 1.8vw, 1.5rem);
    color: var(--c-text);
    margin: 0 0 0.8em;
    letter-spacing: -0.01em;
}

.exit-meta {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    color: var(--c-stone);
    margin: 0;
    text-transform: lowercase;
}

/* ==========================================================================
   Responsive (< 768px)
   ========================================================================== */

@media (max-width: 768px) {
    :root {
        --rail-width: 0px;
    }

    .rail {
        position: fixed;
        top: auto;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: 48px;
        flex-direction: row;
        gap: 22px;
        background: rgba(245, 237, 224, 0.92);
        border-top: 1px solid var(--c-sandstone);
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }

    .rail-thread {
        width: 200px;
        height: 1px;
        top: 50%;
        left: 50%;
    }

    .chamber {
        padding: 12vh 5vw 12vh 5vw;
        min-height: 110vh;
    }

    .chamber-inner,
    .chamber-inner--right {
        margin: 0 auto;
        max-width: 100%;
    }

    .specimen-badge {
        animation: none;
        transform: rotate(15deg);
        margin-left: 0;
        width: 240px;
        height: 240px;
    }

    .specimen-stage {
        justify-content: center;
        height: 280px;
    }

    .specimen-shadow {
        left: 50%;
        transform: translateX(-50%);
    }

    .swatch-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .swatch:nth-child(n) {
        transform: none;
    }

    .swatch:nth-child(n):hover {
        transform: translateY(-4px);
    }

    .assembly-card:nth-child(odd),
    .assembly-card:nth-child(even) {
        margin-left: 0;
        margin-right: 0;
    }

    .thread-line {
        left: 16px;
    }

    .thread-node,
    .thread-node--left,
    .thread-node--right {
        width: calc(100% - 40px);
        margin-left: 40px;
        margin-right: 0;
    }

    .thread-node--left .thread-marker,
    .thread-node--right .thread-marker {
        left: -32px;
        right: auto;
        transform: translateX(-50%);
    }

    .aurora-blob--gold {
        display: none;
    }

    .aurora-blob--rose {
        display: none;
    }

    .ghost-numeral {
        font-size: clamp(3rem, 14vw, 6rem);
    }
}