/* yongjoon.dev — deep-burgundy, full-bleed, four-room narrative */

:root {
    --c-dark: #4A0E2B;       /* Primary Dark / Hero bg */
    --c-mid: #7B2D4E;        /* Primary Mid / cards */
    --c-cream: #F5EDE3;      /* Warm Cream */
    --c-gold: #D4A843;       /* Accent Gold */
    --c-ground: #1A0A14;     /* Deep Ground */
    --c-blue: #5B8FA8;       /* Icon Blue */

    --font-display: 'Josefin Sans', 'Work Sans', system-ui, sans-serif;
    --font-body: 'Work Sans', 'Inter', system-ui, sans-serif;
    --font-mono: 'Fira Code', 'Space Mono', ui-monospace, monospace;

    --spring: cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html, body {
    width: 100%;
    height: 100%;
    background: var(--c-dark);
    color: var(--c-cream);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

body {
    position: relative;
}

/* Decorative circuit pattern, full-page */
.circuit-pattern {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.07;
    z-index: 0;
}

/* Rooms scroll-snap container */
.rooms {
    position: relative;
    z-index: 1;
    height: 100vh;
    overflow-y: auto;
    overflow-x: hidden;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
}

.room {
    position: relative;
    width: 100%;
    min-height: 100vh;
    padding: clamp(2rem, 5vw, 4rem) clamp(1.5rem, 5vw, 5rem);
    scroll-snap-align: start;
    scroll-snap-stop: always;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Room labels (Fira Code) */
.room-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--c-gold);
    letter-spacing: 0.05em;
    display: inline-flex;
    gap: 0.6rem;
    align-items: center;
    opacity: 0.85;
}
.room-label .dash { opacity: 0.5; }
.room-label--dark { color: var(--c-dark); }

/* Section headings */
.section-heading {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2rem, 4vw, 3.5rem);
    letter-spacing: -0.01em;
    color: var(--c-cream);
    margin-top: 0.5rem;
}
.section-heading--dark { color: var(--c-dark); }

.section-sub {
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.3vw, 1.15rem);
    color: var(--c-cream);
    opacity: 0.75;
    max-width: 56ch;
    margin-top: 0.5rem;
    line-height: 1.65;
}

/* ============================================================
   ROOM 1 — Introduction
   ============================================================ */
.room--intro {
    background: var(--c-dark);
    color: var(--c-cream);
    justify-content: center;
    align-items: flex-start;
    text-align: left;
}
.room--intro .room-label {
    position: absolute;
    top: clamp(1.5rem, 4vw, 3rem);
    left: clamp(1.5rem, 5vw, 5rem);
}

.hero-name {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--c-cream);
    user-select: none;
    z-index: 2;
}

.hero-line {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 0.05em;
    font-size: clamp(3.5rem, 9vw, 7rem);
}
.hero-line--small {
    font-size: clamp(2rem, 5vw, 3.6rem);
    color: var(--c-gold);
    font-weight: 600;
    margin-top: 0.4em;
    letter-spacing: -0.01em;
}

.letter {
    display: inline-block;
    transform-origin: 50% 80%;
    animation: heroDrop 0.9s var(--spring) backwards;
    animation-delay: calc(var(--i, 0) * 60ms + 200ms);
    position: relative;
}
.letter.spacer { width: 0.5em; animation: none; }
.letter.punct { color: var(--c-gold); }

/* slight irregular grid: every 3rd letter offset */
.letter:nth-child(3n)   { transform: translateY(-0.05em) rotate(-1.5deg); }
.letter:nth-child(4n+1) { transform: translateY(0.04em) rotate(0.8deg); }
.letter:nth-child(5n+2) { transform: translateY(-0.02em) rotate(-0.5deg); }

.letter-shape {
    display: inline-block;
}
.shape-Y, .shape-J, .shape-N, .shape-N2 { color: var(--c-cream); }
.shape-O, .shape-O2, .shape-O3 { color: var(--c-gold); }
.shape-G { color: var(--c-blue); }

@keyframes heroDrop {
    0%   { transform: translateY(-30px) scale(0.6); opacity: 0; }
    60%  { transform: translateY(4px) scale(1.06); opacity: 1; }
    100% { transform: translateY(0) scale(1); opacity: 1; }
}

/* Decorative shapes */
.intro-shapes {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}
.intro-shapes .shape {
    position: absolute;
    display: block;
    opacity: 0.85;
    animation: floatY 7s ease-in-out infinite;
}
.intro-shapes .circle {
    width: 90px; height: 90px;
    border-radius: 50%;
    background: var(--c-mid);
    top: 14%; right: 10%;
    animation-delay: -2s;
}
.intro-shapes .circle.small {
    width: 36px; height: 36px;
    background: var(--c-gold);
    top: 70%; left: 8%;
    animation-delay: -4s;
}
.intro-shapes .triangle {
    width: 0; height: 0;
    border-left: 40px solid transparent;
    border-right: 40px solid transparent;
    border-bottom: 70px solid var(--c-gold);
    bottom: 18%; right: 20%;
    transform: rotate(15deg);
    animation-delay: -1s;
    opacity: 0.5;
}
.intro-shapes .rect {
    width: 60px; height: 60px;
    background: transparent;
    border: 3px solid var(--c-blue);
    border-radius: 8px;
    top: 22%; left: 6%;
    transform: rotate(-12deg);
    animation-delay: -3s;
}
.intro-shapes .rect.tall {
    width: 28px; height: 100px;
    background: var(--c-mid);
    border: none;
    bottom: 12%; left: 35%;
    transform: rotate(8deg);
    animation-delay: -5s;
    opacity: 0.55;
}

@keyframes floatY {
    0%, 100% { transform: translateY(0) rotate(var(--r, 0deg)); }
    50%      { transform: translateY(-14px) rotate(var(--r, 0deg)); }
}

/* Scroll cue */
.scroll-cue {
    position: absolute;
    bottom: clamp(1.5rem, 4vw, 3rem);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--c-gold);
    opacity: 0.8;
}
.cue-arrow {
    width: 1px;
    height: 36px;
    background: var(--c-gold);
    position: relative;
    animation: cueDrop 1.8s ease-in-out infinite;
}
.cue-arrow::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    width: 8px;
    height: 8px;
    border-right: 1px solid var(--c-gold);
    border-bottom: 1px solid var(--c-gold);
    transform: translateX(-50%) rotate(45deg);
}
@keyframes cueDrop {
    0%, 100% { transform: translateY(0); opacity: 0.8; }
    50%      { transform: translateY(6px); opacity: 0.4; }
}

/* ============================================================
   ROOM 2 — Workshop
   ============================================================ */
.room--workshop {
    background: var(--c-mid);
    color: var(--c-cream);
}
.room--workshop .room-label {
    margin-bottom: 0.5rem;
}

.tool-grid {
    margin-top: clamp(2rem, 4vw, 3rem);
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: clamp(1rem, 2.5vw, 2rem);
    width: 100%;
    max-width: 1300px;
    align-self: center;
}

.tool-card {
    position: relative;
    background: var(--c-dark);
    border: 2px solid var(--c-gold);
    border-radius: 8px;
    padding: 1.5rem 1.4rem 1.6rem;
    transform: rotate(var(--rot, 0deg)) translate(var(--x, 0), var(--y, 0)) scale(0);
    opacity: 0;
    transition: transform 0.35s ease, box-shadow 0.35s ease;
    will-change: transform, opacity;
    box-shadow: 0 6px 0 rgba(26, 10, 20, 0.3);
}

.tool-card.is-in {
    animation: cardBounceIn 0.85s var(--spring) forwards;
    animation-delay: var(--delay, 0ms);
}

@keyframes cardBounceIn {
    0%   { transform: rotate(var(--rot)) translate(var(--x), var(--y)) scale(0); opacity: 0; }
    60%  { transform: rotate(var(--rot)) translate(var(--x), var(--y)) scale(1.08); opacity: 1; }
    100% { transform: rotate(var(--rot)) translate(var(--x), var(--y)) scale(1); opacity: 1; }
}

.tool-card:hover {
    transform: rotate(0deg) translate(0, -4px) scale(1.03);
    box-shadow: 0 10px 0 rgba(26, 10, 20, 0.45);
}

.tool-icon {
    display: inline-flex;
    width: 56px;
    height: 56px;
    margin-bottom: 0.9rem;
}
.tool-icon svg { width: 100%; height: 100%; }

.tool-name {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 1.4rem;
    color: var(--c-gold);
    letter-spacing: -0.01em;
    margin-bottom: 0.35rem;
}

.tool-desc {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--c-cream);
    opacity: 0.82;
    line-height: 1.55;
}
.tool-desc code {
    font-family: var(--font-mono);
    font-size: 0.88rem;
    background: rgba(212, 168, 67, 0.12);
    color: var(--c-gold);
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
}

/* Stroke draw-in for icons */
.draw {
    stroke-dasharray: var(--len, 200);
    stroke-dashoffset: var(--len, 200);
    transition: stroke-dashoffset 0.7s ease-out;
}
.tool-card.is-in .draw,
.signal-stage.is-in .draw {
    stroke-dashoffset: 0;
}

/* ============================================================
   ROOM 3 — Story
   ============================================================ */
.room--story {
    background: var(--c-cream);
    color: var(--c-dark);
    padding-left: clamp(1.5rem, 8vw, 8rem);
    padding-right: clamp(1.5rem, 8vw, 8rem);
    justify-content: center;
}
.room--story .room-label {
    color: var(--c-dark);
    opacity: 0.6;
    position: absolute;
    top: clamp(1.5rem, 4vw, 3rem);
    left: clamp(1.5rem, 5vw, 5rem);
}

.story-bg { position: absolute; inset: 0; pointer-events: none; }
.story-trace {
    position: absolute;
    width: 60%;
    height: auto;
    top: 8%; right: -6%;
}
.story-gear {
    position: absolute;
    width: 220px;
    height: 220px;
    bottom: 4%;
    left: -3%;
    animation: rotateSlow 60s linear infinite;
}
@keyframes rotateSlow { to { transform: rotate(360deg); } }

.story-content {
    position: relative;
    z-index: 2;
    width: 100%;
    max-width: 60ch;
    margin: 0 auto;
}
.story-content .section-heading {
    margin-bottom: 1.6rem;
}
.story-para {
    font-family: var(--font-body);
    font-size: clamp(1.05rem, 1.4vw, 1.25rem);
    line-height: 1.75;
    color: var(--c-dark);
    margin-bottom: 1.1rem;
}
.story-para em {
    color: var(--c-mid);
    font-style: italic;
    font-weight: 500;
}
.story-para--quiet {
    margin-top: 2rem;
    color: var(--c-mid);
    font-style: italic;
}

/* ============================================================
   ROOM 4 — Signal
   ============================================================ */
.room--signal {
    background: var(--c-ground);
    color: var(--c-cream);
    align-items: center;
    text-align: center;
    justify-content: center;
}
.room--signal .room-label {
    position: absolute;
    top: clamp(1.5rem, 4vw, 3rem);
    left: clamp(1.5rem, 5vw, 5rem);
}

.signal-stage {
    position: relative;
    width: 220px;
    height: 260px;
    margin: 0 auto 1.5rem;
}
.signal-tower {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 2;
}
.signal-pulse {
    position: absolute;
    top: 22px;
    left: 50%;
    width: 12px;
    height: 12px;
    border: 2px solid var(--c-gold);
    border-radius: 50%;
    transform: translate(-50%, -50%) scale(1);
    opacity: 0.8;
    animation: pulse 3s ease-out infinite;
}
.pulse-2 { animation-delay: 1s; }
.pulse-3 { animation-delay: 2s; }
@keyframes pulse {
    0%   { transform: translate(-50%, -50%) scale(0.5); opacity: 0.85; }
    80%  { transform: translate(-50%, -50%) scale(7); opacity: 0; }
    100% { transform: translate(-50%, -50%) scale(7); opacity: 0; }
}

.signal-heading {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(2rem, 4vw, 3.5rem);
    color: var(--c-cream);
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
}
.signal-sub {
    font-family: var(--font-body);
    color: var(--c-cream);
    opacity: 0.7;
    margin-bottom: 2rem;
    font-size: 1.05rem;
}

.signal-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.7rem;
    margin-bottom: 2.5rem;
    align-items: center;
}
.signal-links li {
    display: inline-flex;
    align-items: baseline;
    gap: 0.8rem;
    font-family: var(--font-mono);
    font-size: 1rem;
}
.link-key {
    color: var(--c-gold);
    opacity: 0.7;
    font-size: 0.85rem;
}
.signal-links a {
    color: var(--c-cream);
    text-decoration: none;
    border-bottom: 1px solid rgba(245, 237, 227, 0.3);
    padding-bottom: 1px;
    transition: color 0.25s ease, border-color 0.25s ease;
}
.signal-links a:hover {
    color: var(--c-gold);
    border-bottom-color: var(--c-gold);
}

.signal-foot {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--c-gold);
    opacity: 0.5;
}
.signal-foot code { font-family: inherit; }

/* ============================================================
   Room indicator
   ============================================================ */
.room-indicator {
    position: fixed;
    right: clamp(1rem, 2.5vw, 2.2rem);
    top: 50%;
    transform: translateY(-50%);
    z-index: 50;
    display: flex;
    flex-direction: column;
    gap: 1.1rem;
}

.room-dot {
    appearance: none;
    background: transparent;
    border: 2px solid var(--c-gold);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
    position: relative;
    transition: background-color 300ms ease, transform 300ms ease;
}
.room-dot.is-active {
    background: var(--c-gold);
    transform: scale(1.15);
}
.room-dot .room-num {
    position: absolute;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--c-gold);
    opacity: 0;
    transition: opacity 250ms ease;
    pointer-events: none;
    white-space: nowrap;
}
.room-dot:hover .room-num,
.room-dot.is-active .room-num { opacity: 0.9; }

/* Light room: dot color shifts to dark */
body.in-room-3 .room-dot {
    border-color: var(--c-dark);
}
body.in-room-3 .room-dot.is-active {
    background: var(--c-dark);
}
body.in-room-3 .room-dot .room-num {
    color: var(--c-dark);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 720px) {
    .room { padding: 4.5rem 1.25rem 3rem; }
    .room--intro .room-label,
    .room--story .room-label,
    .room--signal .room-label { top: 1.25rem; left: 1.25rem; }
    .tool-grid { grid-template-columns: 1fr 1fr; gap: 1rem; }
    .tool-card { padding: 1.1rem 1rem 1.2rem; }
    .room-indicator { right: 0.8rem; gap: 0.9rem; }
    .room-dot .room-num { display: none; }
    .story-trace { width: 100%; opacity: 0.9; }
    .story-gear { width: 140px; height: 140px; }
    .signal-stage { width: 170px; height: 200px; }
}