/* === Reset & Base === */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --kuro: #1a1118;
    --enji: #6b1d3a;
    --sakura-nezumi: #8c3a56;
    --kinari: #f0e6d8;
    --nezumi: #6e6a6f;
    --murasaki: #2d1628;
    --hai-sakura: #b8707e;
    --sumi: #2a2226;
    --ease-settle: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--kuro);
    color: var(--kinari);
    font-family: 'IBM Plex Mono', monospace;
    overflow-x: hidden;
}

/* === Scroll Progress Indicator === */
#scroll-progress {
    position: fixed;
    top: 0;
    right: 0;
    width: 1px;
    height: 0%;
    background-color: var(--enji);
    z-index: 1000;
    transition: height 100ms linear;
}

/* === Cursor Trail === */
#cursor-trail {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 999;
}

#cursor-trail circle {
    transition: opacity 1200ms var(--ease-settle);
}

/* === Entry Void === */
#entry-void {
    position: relative;
    width: 100%;
    height: 100vh;
    overflow: hidden;
}

#studio-mark {
    position: absolute;
    top: 0;
    left: 0;
    padding: clamp(24px, 4vw, 64px);
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 600;
    font-size: clamp(0.875rem, 1.5vw, 1.125rem);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--kinari);
    opacity: 0;
    transition: opacity 800ms ease-out;
}

#studio-mark.visible {
    opacity: 1;
}

#hero-flow-field {
    position: absolute;
    bottom: 10vh;
    right: 15vw;
    width: 40vw;
    height: 40vh;
    opacity: 0;
    transition: opacity 1200ms var(--ease-settle);
}

#hero-flow-field.visible {
    opacity: 1;
}

#hero-flow-field path {
    fill: none;
    stroke: var(--sakura-nezumi);
    stroke-linecap: round;
}

/* === Portfolio Section === */
#portfolio {
    padding: 20vh clamp(24px, 4vw, 64px);
}

#portfolio-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: clamp(16px, 2.5vw, 40px);
    max-width: 1400px;
    margin: 0 auto;
}

.grid-cell {
    position: relative;
    background: var(--murasaki);
    border: 2px solid var(--sumi);
    border-radius: 2px;
    overflow: hidden;
    min-height: 200px;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 600ms var(--ease-settle), transform 600ms var(--ease-settle), border-color 300ms var(--ease-settle);
}

.grid-cell.revealed {
    opacity: 1;
    transform: translateY(0);
}

.grid-cell:hover {
    border-color: var(--enji);
}

.grid-cell:hover .cell-art path,
.grid-cell:hover .cell-art circle,
.grid-cell:hover .cell-art line {
    opacity: 1;
}

.cell-art {
    width: 100%;
    height: 100%;
    position: absolute;
    top: 0;
    left: 0;
}

.cell-art path {
    fill: none;
    stroke: var(--sakura-nezumi);
    stroke-linecap: round;
    transition: opacity 300ms var(--ease-settle);
}

.cell-art circle {
    fill: var(--kinari);
    transition: opacity 300ms var(--ease-settle);
}

.cell-art line {
    stroke: var(--enji);
    stroke-width: 1px;
    transition: opacity 300ms var(--ease-settle);
}

.cell-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 8px 12px;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.6875rem;
    letter-spacing: 0.08em;
    color: var(--nezumi);
    background: linear-gradient(transparent, var(--murasaki));
}

/* Skeleton loading */
.skeleton {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
    padding: 20%;
    z-index: 2;
    transition: opacity 400ms var(--ease-settle);
}

.skeleton span {
    display: block;
    height: 1px;
    background: linear-gradient(90deg, var(--murasaki), var(--enji), var(--murasaki));
    background-size: 200% 100%;
    animation: skeleton-pulse 2000ms ease-in-out infinite;
}

.skeleton span:nth-child(1) { width: 80%; }
.skeleton span:nth-child(2) { width: 60%; }
.skeleton span:nth-child(3) { width: 70%; }

.skeleton.hidden {
    opacity: 0;
    pointer-events: none;
}

@keyframes skeleton-pulse {
    0%, 100% { background-position: 200% 0; }
    50% { background-position: -200% 0; }
}

/* === Process Strip === */
#process {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 clamp(24px, 4vw, 64px);
    margin-top: 20vh;
}

#process-strip {
    display: flex;
    align-items: center;
    gap: clamp(32px, 5vw, 80px);
}

.process-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.process-diagram svg {
    width: clamp(100px, 15vw, 200px);
    height: clamp(100px, 15vw, 200px);
}

.process-label {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--nezumi);
}

.process-connector {
    width: clamp(40px, 8vw, 100px);
    height: 20px;
    flex-shrink: 0;
}

.connector-line {
    stroke-dashoffset: 200;
    transition: stroke-dashoffset 1500ms var(--ease-settle);
}

.connector-line.drawn {
    stroke-dashoffset: 0;
}

/* === Statement Field === */
#statement {
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--enji);
    padding: clamp(48px, 8vw, 120px) clamp(24px, 4vw, 64px);
    margin-top: 20vh;
}

#statement-text {
    max-width: 55ch;
}

.statement-line {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-size: clamp(1.25rem, 2.5vw, 2rem);
    line-height: 1.8;
    color: var(--kinari);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 500ms var(--ease-settle), transform 500ms var(--ease-settle);
}

.statement-line.visible {
    opacity: 1;
    transform: translateY(0);
}

/* === Contact Plinth === */
#contact {
    min-height: 40vh;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: clamp(48px, 6vw, 96px);
    margin-top: 20vh;
}

#colophon {
    text-align: center;
}

#colophon-rule {
    border: none;
    border-top: 0.5px solid var(--sumi);
    width: 120px;
    margin: 0 auto 32px;
}

.colophon-line {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--nezumi);
    line-height: 2.2;
}

/* === Responsive === */
@media (max-width: 768px) {
    #portfolio-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid-cell {
        min-height: 150px;
    }

    #hero-flow-field {
        width: 60vw;
        right: 5vw;
    }

    #process-strip {
        flex-direction: column;
    }

    .process-connector {
        transform: rotate(90deg);
    }
}