/* prototype.moe — pop-art kissaten archive */

:root {
    --soot-black: #1A1A1A;
    --kissaten-walnut: #2E2419;
    --kissaten-cream: #E8DBC5;
    --halftone-rose: #C46B8A;
    --yokoo-amber: #D4953A;
    --kissaten-teal: #4A8B7A;
    --faded-ink: #6B6259;

    --gap: 6px;
    --max-width: 1120px;
    --nav-width: 48px;

    --serif: "Libre Baskerville", "Times New Roman", Georgia, serif;
    --sans: "Space Grotesk", "Inter", system-ui, sans-serif;
    --mono: "IBM Plex Mono", "Menlo", monospace;

    --spring: cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --spring-overshoot: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--kissaten-cream);
    color: var(--soot-black);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.7;
    letter-spacing: 0.01em;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ======== NAV STRIP ======== */
.nav-strip {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: var(--nav-width);
    background: var(--kissaten-walnut);
    color: var(--kissaten-cream);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 18px 0;
    border-right: 1px solid rgba(232, 219, 197, 0.08);
}

.nav-strip__logo {
    display: block;
    width: 32px;
    height: 32px;
    line-height: 0;
    margin-bottom: 28px;
    text-decoration: none;
    transition: transform 0.4s var(--spring);
}

.nav-strip__logo:hover {
    transform: rotate(-6deg) scale(1.05);
}

.nav-strip__waypoints {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 22px;
    margin-top: 12px;
}

.waypoint {
    display: block;
    width: 22px;
    height: 22px;
    position: relative;
    text-decoration: none;
}

.waypoint__dot {
    position: absolute;
    inset: 5px;
    border: 1px solid var(--kissaten-cream);
    border-radius: 50%;
    background: transparent;
    transition: transform 0.5s var(--spring), background 0.4s var(--spring);
}

.waypoint::after {
    content: "";
    position: absolute;
    inset: -2px;
    border-radius: 50%;
    border: 1px solid transparent;
    transition: border-color 0.6s var(--spring), transform 0.6s var(--spring);
}

.waypoint.is-active .waypoint__dot {
    background: var(--halftone-rose);
    border-color: var(--halftone-rose);
    transform: scale(1.15);
    animation: waypointPulse 2.4s ease-in-out infinite;
}

.waypoint.is-active::after {
    border-color: rgba(196, 107, 138, 0.6);
    transform: scale(1.4);
}

@keyframes waypointPulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(196, 107, 138, 0.55); }
    50% { box-shadow: 0 0 0 6px rgba(196, 107, 138, 0); }
}

.nav-strip__meta {
    margin-top: auto;
    height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-strip__rotated {
    font-family: var(--mono);
    font-size: 9px;
    letter-spacing: 0.32em;
    color: rgba(232, 219, 197, 0.55);
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    white-space: nowrap;
}

/* ======== MAIN ======== */
.main {
    margin-left: var(--nav-width);
    padding: 0 0 0 0;
    position: relative;
}

/* ======== ROOM ======== */
.room {
    padding: 96px 56px 96px;
    min-height: 100vh;
    position: relative;
    transition: background-color 0.5s var(--spring);
}

.room--foyer {
    background: var(--kissaten-cream);
    color: var(--soot-black);
}

.room--archive {
    background: var(--soot-black);
    color: var(--kissaten-cream);
    padding-top: 140px;
}

.room--studio {
    background: var(--kissaten-cream);
    color: var(--soot-black);
    padding-top: 140px;
}

.room__header {
    max-width: var(--max-width);
    margin: 0 auto 56px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(26, 26, 26, 0.12);
    position: relative;
}

.room__header--inverted {
    border-bottom-color: rgba(232, 219, 197, 0.18);
}

.room__index {
    display: block;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--halftone-rose);
    margin-bottom: 28px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.9s var(--spring), transform 0.9s var(--spring);
}

.room__title {
    font-family: var(--serif);
    font-weight: 700;
    font-size: clamp(42px, 6.4vw, 72px);
    line-height: 1.05;
    letter-spacing: -0.01em;
    max-width: 980px;
    opacity: 0;
    transform: translateY(40px) scale(0.98);
    transition: opacity 1.1s var(--spring), transform 1.1s var(--spring);
}

.room__title em {
    font-style: italic;
    color: var(--halftone-rose);
}

.room--archive .room__title em {
    color: var(--yokoo-amber);
}

.room__lede {
    font-family: var(--sans);
    font-size: 18px;
    line-height: 1.7;
    margin-top: 28px;
    max-width: 640px;
    color: var(--faded-ink);
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 1.1s var(--spring) 0.18s, transform 1.1s var(--spring) 0.18s;
}

.room--archive .room__lede {
    color: rgba(232, 219, 197, 0.7);
}

.room.is-visible .room__index,
.room.is-visible .room__title,
.room.is-visible .room__lede {
    opacity: 1;
    transform: none;
}

/* ======== GRID ======== */
.grid {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    gap: var(--gap);
}

.grid--foyer {
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: 280px 360px 320px;
    grid-template-areas:
        "a a a a a b b b b c c c"
        "d d e e e e e e f f f f"
        "d d e e e e e e f f f f";
}

.grid--archive {
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: 320px 360px 280px;
    grid-template-areas:
        "g1 g1 g1 g1 g2 g2 g2 g2 g3 g3 g3 g3"
        "g4 g4 g4 g5 g5 g5 g5 g5 g5 g6 g6 g6"
        "g7 g7 g7 g7 g8 g8 g8 g8 g8 g8 g8 g8";
}

/* ======== MODULE ======== */
.module {
    position: relative;
    padding: 28px 30px;
    border: 1px solid transparent;
    overflow: hidden;
    transform: translateY(40px);
    opacity: 0;
    transition:
        opacity 0.9s var(--spring),
        transform 0.9s var(--spring-overshoot),
        border-color 0.4s var(--spring),
        box-shadow 0.5s var(--spring);
    will-change: transform;
}

.module.is-in {
    opacity: 1;
    transform: translateY(0);
}

.module:hover {
    border-color: var(--kissaten-cream);
    box-shadow: 0 14px 40px -22px rgba(26, 26, 26, 0.4);
}

.module--cream {
    background: var(--kissaten-cream);
    color: var(--soot-black);
    border-color: rgba(26, 26, 26, 0.06);
}

.module--cream:hover {
    border-color: var(--soot-black);
}

.module--soot {
    background: var(--soot-black);
    color: var(--kissaten-cream);
    border-color: rgba(232, 219, 197, 0.08);
}

.module--soot:hover {
    border-color: var(--kissaten-cream);
}

.module--walnut {
    background: var(--kissaten-walnut);
    color: var(--kissaten-cream);
}

.module--walnut:hover {
    border-color: var(--yokoo-amber);
}

.module--rose {
    background: linear-gradient(180deg, #d8809e 0%, var(--halftone-rose) 100%);
    color: var(--soot-black);
}

.module--amber {
    background: linear-gradient(180deg, #e2a14a 0%, var(--yokoo-amber) 100%);
    color: var(--soot-black);
}

.module__code {
    position: absolute;
    top: 14px;
    right: 16px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--halftone-rose);
    background: transparent;
    z-index: 5;
    transition: transform 0.45s var(--spring-overshoot), color 0.4s var(--spring);
}

.module--soot .module__code,
.module--walnut .module__code {
    color: var(--yokoo-amber);
}

.module__code.is-pulsed {
    transform: scale(1.18);
    color: var(--halftone-rose);
}

.module__title,
.module__heading {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 26px;
    line-height: 1.15;
    letter-spacing: -0.005em;
    margin-bottom: 14px;
    color: inherit;
}

.module__heading--light {
    color: var(--kissaten-cream);
}

.module__body {
    font-family: var(--sans);
    font-size: 15px;
    line-height: 1.65;
    color: var(--faded-ink);
}

.module--soot .module__body,
.module--walnut .module__body {
    color: rgba(232, 219, 197, 0.7);
}

.module__body--light { color: rgba(232, 219, 197, 0.78); }
.module__body--small { font-size: 13.5px; }

.module__rule {
    display: block;
    width: 36px;
    height: 2px;
    background: var(--yokoo-amber);
    margin: 18px 0;
}

.module__caption {
    position: absolute;
    bottom: 16px;
    left: 30px;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--faded-ink);
}

.module__caption--light { color: rgba(232, 219, 197, 0.6); }
.module__caption--inset {
    color: var(--soot-black);
    background: var(--kissaten-cream);
    padding: 4px 8px;
    bottom: 14px;
    left: 14px;
}

.module__meta {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.12em;
    line-height: 1.7;
    color: var(--faded-ink);
}

/* quote module */
.module--quote {
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.module__quote {
    font-family: var(--serif);
    font-style: italic;
    font-size: 19px;
    line-height: 1.45;
    color: var(--kissaten-cream);
    position: relative;
    padding-left: 4px;
}

.module__quote-mark {
    display: block;
    font-size: 60px;
    line-height: 0.6;
    color: var(--yokoo-amber);
    margin-bottom: 8px;
    font-style: normal;
}

.module__cite {
    display: block;
    margin-top: 18px;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(232, 219, 197, 0.55);
    font-style: normal;
}

/* dl module */
.module__dl {
    margin-top: 8px;
}

.module__dl dt {
    font-family: var(--serif);
    font-weight: 700;
    font-size: 16px;
    color: var(--soot-black);
    margin-top: 14px;
}

.module__dl dt:first-child { margin-top: 0; }

.module__dl dd {
    font-family: var(--sans);
    font-size: 14px;
    line-height: 1.55;
    color: var(--faded-ink);
    margin-top: 4px;
}

/* list module */
.module__list {
    list-style: none;
    counter-reset: inv;
}

.module__list li {
    display: flex;
    gap: 16px;
    padding: 8px 0;
    border-bottom: 1px solid rgba(232, 219, 197, 0.1);
    font-size: 13.5px;
    line-height: 1.5;
    color: rgba(232, 219, 197, 0.78);
    align-items: baseline;
}

.module__list li:last-child { border-bottom: none; }

.module__list-num {
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.18em;
    color: var(--yokoo-amber);
    flex-shrink: 0;
    min-width: 38px;
}

/* diagram modules */
.module--diagram {
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.module__svg-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
    padding: 12px 0;
}

.iso-svg {
    width: 100%;
    max-width: 280px;
    height: auto;
    transition: transform 0.6s var(--spring-overshoot);
}

.iso-svg--large {
    max-width: 100%;
    height: auto;
}

.module:hover .iso-svg {
    transform: rotate(-1deg) scale(1.03);
}

.iso-rotate {
    transform-origin: center;
}

.iso-steam {
    stroke-dasharray: 60;
    stroke-dashoffset: 60;
    animation: steamFlow 3.4s ease-in-out infinite;
}

.iso-steam--b {
    animation-delay: 0.6s;
}

@keyframes steamFlow {
    0% { stroke-dashoffset: 60; opacity: 0; }
    25% { opacity: 0.8; }
    100% { stroke-dashoffset: -60; opacity: 0; }
}

/* halftone fields */
.halftone-field {
    position: absolute;
    inset: 0;
    background-size: 14px 14px;
    background-position: 0 0;
}

.halftone-field--rose {
    background-image: radial-gradient(circle, var(--halftone-rose) 30%, transparent 30%);
    background-color: var(--kissaten-cream);
    background-size: 12px 12px;
    opacity: 0.65;
}

.halftone-field--amber {
    background-image: radial-gradient(circle, var(--soot-black) 30%, transparent 30%);
    background-color: var(--yokoo-amber);
    background-size: 14px 14px;
    opacity: 0.85;
}

.module--pattern { padding: 0; }
.module--pattern .module__code { color: var(--soot-black); }

/* annotation */
.module--annotation {
    background: var(--kissaten-cream);
}

/* ======== FRIEZE ======== */
.frieze {
    max-width: var(--max-width);
    margin: 56px auto 0;
    height: 60px;
    overflow: hidden;
    opacity: 0.5;
}

.frieze__svg {
    width: 100%;
    height: 100%;
    display: block;
}

/* ======== HALFTONE FLASH (transitions) ======== */
.halftone-flash {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 900;
    opacity: 0;
}

.halftone-flash__pattern {
    position: absolute;
    inset: -10%;
    background-image: radial-gradient(circle, var(--halftone-rose) 30%, transparent 30%);
    background-size: 28px 28px;
    transform: scale(0);
    transform-origin: center;
}

.halftone-flash.is-firing {
    animation: flashOuter 360ms ease-out;
}

.halftone-flash.is-firing .halftone-flash__pattern {
    animation: flashInner 360ms ease-out;
}

@keyframes flashOuter {
    0% { opacity: 0; }
    35% { opacity: 1; }
    100% { opacity: 0; }
}

@keyframes flashInner {
    0% { transform: scale(0); }
    50% { transform: scale(1); }
    100% { transform: scale(1.4); }
}

/* ======== STUDIO ======== */
.studio-scene {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    background: var(--kissaten-cream);
    border: 1px solid rgba(26, 26, 26, 0.08);
    padding: 32px;
    min-height: 540px;
}

.studio-scene__svg-wrap {
    position: relative;
    z-index: 1;
}

.studio-callouts {
    list-style: none;
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.studio-callouts__item {
    position: absolute;
    top: var(--top);
    left: var(--left);
    max-width: 220px;
    background: rgba(232, 219, 197, 0.92);
    border-left: 2px solid var(--halftone-rose);
    padding: 12px 14px;
    pointer-events: auto;
    backdrop-filter: blur(2px);
    transform: translateY(12px);
    opacity: 0;
    transition: opacity 0.7s var(--spring), transform 0.7s var(--spring-overshoot);
    z-index: 4;
}

.is-visible .studio-callouts__item:nth-child(1) { transition-delay: 0.4s; }
.is-visible .studio-callouts__item:nth-child(2) { transition-delay: 0.55s; }
.is-visible .studio-callouts__item:nth-child(3) { transition-delay: 0.7s; }
.is-visible .studio-callouts__item:nth-child(4) { transition-delay: 0.85s; }

.is-visible .studio-callouts__item {
    opacity: 1;
    transform: translateY(0);
}

.studio-callouts__code {
    display: block;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.2em;
    color: var(--halftone-rose);
    margin-bottom: 4px;
}

.studio-callouts__title {
    display: block;
    font-family: var(--serif);
    font-weight: 700;
    font-size: 17px;
    color: var(--soot-black);
    margin-bottom: 4px;
}

.studio-callouts__body {
    display: block;
    font-family: var(--sans);
    font-size: 12.5px;
    line-height: 1.5;
    color: var(--faded-ink);
}

.studio-footer {
    max-width: var(--max-width);
    margin: 56px auto 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
    border-top: 1px solid rgba(26, 26, 26, 0.12);
    padding-top: 32px;
}

.studio-footer__col {
    padding: 16px 0;
}

.studio-footer__label {
    display: block;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.22em;
    color: var(--halftone-rose);
    margin-bottom: 12px;
}

.studio-footer__line {
    font-family: var(--sans);
    font-size: 13.5px;
    line-height: 1.55;
    color: var(--faded-ink);
}

.studio-footer__line--big {
    font-family: var(--serif);
    font-size: 42px;
    color: var(--soot-black);
    line-height: 1;
}

/* ======== BACKGROUND BLOBS ======== */
.room--foyer::before,
.room--studio::before {
    content: "";
    position: absolute;
    width: 520px;
    height: 360px;
    background: radial-gradient(ellipse at center, var(--halftone-rose) 0%, transparent 70%);
    opacity: 0.1;
    top: 14%;
    right: -120px;
    pointer-events: none;
    border-radius: 50%;
    filter: blur(8px);
}

.room--foyer::after {
    content: "";
    position: absolute;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, var(--yokoo-amber) 0%, transparent 65%);
    opacity: 0.09;
    bottom: 10%;
    left: -80px;
    pointer-events: none;
    border-radius: 50%;
}

.room--archive::before {
    content: "";
    position: absolute;
    width: 600px;
    height: 380px;
    background: radial-gradient(ellipse at center, var(--halftone-rose) 0%, transparent 65%);
    opacity: 0.08;
    top: 20%;
    left: 30%;
    pointer-events: none;
    border-radius: 50%;
    filter: blur(6px);
}

/* ======== RESPONSIVE ======== */
@media (max-width: 900px) {
    .room {
        padding: 72px 32px 72px;
    }

    .grid--foyer,
    .grid--archive {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        grid-template-areas: none;
    }

    .module {
        grid-area: auto !important;
        min-height: 240px;
    }

    .studio-callouts {
        position: static;
        margin-top: 24px;
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 8px;
    }

    .studio-callouts__item {
        position: static;
        max-width: none;
    }

    .studio-footer {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-strip {
        top: auto;
        right: 0;
        bottom: 0;
        height: 56px;
        width: 100%;
        flex-direction: row;
        padding: 0 18px;
        border-right: none;
        border-top: 1px solid rgba(232, 219, 197, 0.1);
    }

    .nav-strip__logo {
        margin-bottom: 0;
        margin-right: 24px;
    }

    .nav-strip__waypoints {
        flex-direction: row;
        margin-top: 0;
        gap: 18px;
    }

    .nav-strip__meta { display: none; }

    .main { margin-left: 0; padding-bottom: 56px; }

    .room { padding: 48px 22px; }
    .room--archive,
    .room--studio { padding-top: 88px; }

    .room__title { font-size: clamp(34px, 9vw, 48px); }
    .studio-callouts { grid-template-columns: 1fr; }
    .studio-footer { grid-template-columns: 1fr; }
}