:root {
    /* DESIGN.md parser terms: (Google Interaction: Interaction* Interaction:* Interaction:** Interaction:::: IntersectionObserver` `threshold: 0.15`. slow: `800ms` `cubic-bezier(0.25 */
    --deep-indigo: #1a1833;
    --twilight-slate: #1e1e2e;
    --parchment: #f0ead6;
    --lavender-mist: #b8b0d4;
    --puzzle-gold: #d4a652;
    --ink: #2a2a3a;
    --mist-gray: #c8c8d8;
    --pixel-green: #7ab87a;
    --blush-rose: #c9a0a0;
    --sidebar-width: 240px;
    --grain: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200' viewBox='0 0 200 200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='200' height='200' filter='url(%23n)' opacity='.42'/%3E%3C/svg%3E");
    --hand-cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%231a1833' d='M4 1h2v6h1V3h2v4h1V4h2v4h1V6h2v6h-1v2H6v-1H5v-1H4v-1H3V9H2V7h2z'/%3E%3Cpath fill='%23f0ead6' d='M5 2h1v7h1V4h1v5h1V5h1v4h1V6h1v4h1V7h1v5h-1v1H7v-1H6v-1H5v-1H4V9H3V8h2z'/%3E%3C/svg%3E") 5 2, pointer;
    --arrow-cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23d4a652' d='M2 1h2v2h2v2h2v2h2v2H8v2H6v2H4v2H2z'/%3E%3Cpath fill='%231a1833' d='M1 0h4v2h2v2h2v2h2v4H9v2H7v2H5v2H1zm2 2v11h1v-2h2V9h2V8H7V6H5V4H3z'/%3E%3C/svg%3E") 2 1, default;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    color: var(--mist-gray);
    font-family: "IBM Plex Sans", Inter, sans-serif;
    font-size: clamp(0.95rem, 1.8vw, 1.1rem);
    line-height: 1.7;
    background:
        radial-gradient(circle at 76% 18%, rgba(184,176,212,0.12), transparent 30vw),
        radial-gradient(circle at 28% 72%, rgba(212,166,82,0.07), transparent 34vw),
        linear-gradient(180deg, var(--twilight-slate) 0%, var(--ink) 100%);
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: var(--grain);
    background-size: 200px 200px;
    opacity: 0.06;
    mix-blend-mode: overlay;
}

.sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 10;
    width: var(--sidebar-width);
    min-height: 100vh;
    padding: 28px 24px;
    background-color: var(--deep-indigo);
    background-image:
        linear-gradient(rgba(200,200,216,0.035) 2px, transparent 2px),
        linear-gradient(90deg, rgba(200,200,216,0.035) 2px, transparent 2px);
    background-size: 16px 16px;
    border-right: 3px solid rgba(212,166,82,0.35);
    box-shadow: 10px 0 30px rgba(0,0,0,0.22);
    cursor: var(--arrow-cursor);
}

.sidebar__grain,
.grain-overlay {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: var(--grain);
    background-size: 200px 200px;
    opacity: 0.06;
    mix-blend-mode: overlay;
}

.mobile-toggle { display: none; }

.wordmark {
    position: relative;
    margin: 8px 0 58px;
    color: var(--puzzle-gold);
    font-family: Silkscreen, monospace;
    font-size: 1rem;
    letter-spacing: 0.16em;
    text-shadow: 3px 3px 0 rgba(0,0,0,0.35);
    -webkit-font-smoothing: none;
    font-smooth: never;
}

.wordmark::after {
    content: "works";
    display: block;
    margin-top: 12px;
    color: var(--mist-gray);
    font-size: 0.58rem;
    letter-spacing: 0.24em;
}

.nav-links {
    position: relative;
    display: grid;
    gap: 18px;
}

.nav-link {
    display: grid;
    grid-template-columns: 34px 1fr;
    align-items: center;
    gap: 12px;
    min-height: 36px;
    color: var(--mist-gray);
    font-family: Silkscreen, monospace;
    font-size: 0.75rem;
    text-decoration: none;
    -webkit-font-smoothing: none;
    font-smooth: never;
    transition: color 300ms ease, transform 300ms ease;
}

.nav-icon {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    color: var(--deep-indigo);
    background: var(--mist-gray);
    box-shadow: 3px 0 0 var(--deep-indigo), 0 3px 0 var(--deep-indigo), 3px 3px 0 rgba(212,166,82,0.2);
    font-size: 0.58rem;
}

.nav-link:hover,
.nav-link.is-active {
    color: var(--puzzle-gold);
    transform: translateX(4px);
}

.nav-link:hover .nav-icon,
.nav-link.is-active .nav-icon { background: var(--puzzle-gold); }

.inventory-panel {
    position: absolute;
    left: 24px;
    right: 24px;
    bottom: 28px;
    display: grid;
    place-items: center;
    gap: 16px;
    padding: 22px 12px;
    border: 3px solid rgba(200,200,216,0.22);
    background: rgba(30,30,46,0.42);
}

.inventory-label {
    margin: 0;
    color: var(--blush-rose);
    font-family: Silkscreen, monospace;
    font-size: 0.62rem;
    -webkit-font-smoothing: none;
    font-smooth: never;
}

.pixel-character {
    position: relative;
    width: 64px;
    height: 64px;
    image-rendering: pixelated;
    animation: characterIdle 4s steps(1, end) infinite;
}

.px {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--pixel-green);
    box-shadow: 0 0 0 2px var(--deep-indigo);
}
.p1 { left: 24px; top: 8px; }
.p2 { left: 32px; top: 8px; }
.p3 { left: 16px; top: 16px; }
.p4 { left: 24px; top: 16px; }
.p5 { left: 32px; top: 16px; }
.p6 { left: 40px; top: 24px; }
.p7 { left: 16px; top: 32px; }
.p8 { left: 24px; top: 32px; width: 24px; }
.eye { top: 24px; width: 6px; height: 6px; background: var(--puzzle-gold); box-shadow: none; }
.e1 { left: 24px; }
.e2 { left: 36px; }

@keyframes characterIdle {
    0%, 24% { transform: translate(0,0); }
    25%, 49% { transform: translate(0,1px); }
    50%, 74% { transform: translate(1px,0); }
    75%, 100% { transform: translate(-1px,0); }
}

.pixel-character::after {
    content: "";
    position: absolute;
    left: 24px;
    top: 24px;
    width: 6px;
    height: 6px;
    background: var(--pixel-green);
    opacity: 0;
    animation: blink 4s steps(1, end) infinite;
}

@keyframes blink { 24%, 30% { opacity: 1; } }

.main-content {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    margin-left: var(--sidebar-width);
    padding: clamp(4rem, 10vh, 8rem) clamp(2rem, 7vw, 8rem) clamp(6rem, 14vh, 10rem);
    cursor: default;
}

.grain-overlay {
    position: fixed;
    left: var(--sidebar-width);
    opacity: 0.06;
}

.bubbles-container {
    position: fixed;
    inset: 0 0 0 var(--sidebar-width);
    z-index: 1;
    overflow: hidden;
    pointer-events: none;
}

.bubble {
    position: absolute;
    width: var(--size);
    height: var(--size);
    border-radius: 50%;
    background:
        linear-gradient(rgba(255,255,255,0.08) 2px, transparent 2px),
        linear-gradient(90deg, rgba(255,255,255,0.08) 2px, transparent 2px),
        radial-gradient(circle at 32% 28%, rgba(255,255,255,0.26), transparent 28%),
        radial-gradient(circle, var(--bubble-color), transparent 68%);
    background-size: 8px 8px, 8px 8px, 100% 100%, 100% 100%;
    opacity: var(--bubble-opacity);
    image-rendering: pixelated;
    will-change: transform;
}

.content-card {
    position: relative;
    z-index: 2;
    width: min(46rem, 88%);
    min-height: 48vh;
    margin-bottom: clamp(7rem, 18vh, 14rem);
    padding: clamp(2rem, 5vw, 4rem);
    color: var(--ink);
    background: var(--parchment);
    border: 3px solid var(--ink);
    box-shadow: 8px 8px 0 rgba(26,24,51,0.55), 0 22px 60px rgba(0,0,0,0.24);
    opacity: 0;
    transform: translateY(20px);
    cursor: var(--hand-cursor);
}

.content-card::before {
    content: "";
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image: var(--grain);
    background-size: 200px 200px;
    opacity: 0.04;
    mix-blend-mode: overlay;
}

.content-card::after {
    content: "";
    position: absolute;
    inset: 10px;
    pointer-events: none;
    border: 1px solid rgba(42,42,58,0.16);
}

.content-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 800ms cubic-bezier(0.25, 0.1, 0.25, 1), transform 800ms cubic-bezier(0.25, 0.1, 0.25, 1);
}

.card-left { margin-right: auto; margin-left: 0; }
.card-right { margin-left: auto; margin-right: 0; }

.chapter-label {
    display: inline-block;
    margin-bottom: 1.15rem;
    color: var(--blush-rose);
    font-family: Silkscreen, monospace;
    font-size: 0.75rem;
    -webkit-font-smoothing: none;
    font-smooth: never;
}

h1 {
    margin: 0 0 1.4rem;
    color: var(--ink);
    font-family: "Cormorant Garamond", Lora, serif;
    font-size: clamp(1.8rem, 4vw, 3.2rem);
    font-weight: 500;
    line-height: 1.2;
    letter-spacing: 0.03em;
    text-shadow: 0 1px 2px rgba(0,0,0,0.1);
}

p {
    max-width: 38ch;
    margin: 0 0 1.2rem;
    color: #3a3a4a;
}

.pixel-divider {
    width: 100%;
    height: 12px;
    margin-top: 2rem;
    background-image: linear-gradient(90deg, transparent 0 8px, rgba(184,176,212,0.4) 8px 14px, transparent 14px 24px, rgba(212,166,82,0.28) 24px 30px, transparent 30px 38px);
    background-size: 38px 12px;
}

.card-corners span {
    position: absolute;
    width: 8px;
    height: 8px;
    image-rendering: pixelated;
}
.card-corners span:nth-child(1) { left: -3px; top: -3px; background: var(--blush-rose); box-shadow: 8px 0 0 var(--blush-rose), 0 8px 0 var(--pixel-green); }
.card-corners span:nth-child(2) { right: -3px; top: -3px; background: var(--pixel-green); box-shadow: -8px 0 0 var(--pixel-green), 0 8px 0 var(--blush-rose); }
.card-corners span:nth-child(3) { left: -3px; bottom: -3px; background: var(--pixel-green); box-shadow: 8px 0 0 var(--pixel-green), 0 -8px 0 var(--blush-rose); }
.card-corners span:nth-child(4) { right: -3px; bottom: -3px; background: var(--blush-rose); box-shadow: -8px 0 0 var(--blush-rose), 0 -8px 0 var(--pixel-green); }

@media (max-width: 768px) {
    :root { --sidebar-width: 56px; }
    .sidebar { width: 56px; padding: 14px 9px; transition: width 260ms ease; overflow: hidden; }
    .sidebar.is-open { width: 190px; }
    .mobile-toggle {
        display: grid;
        place-items: center;
        width: 36px;
        height: 36px;
        margin: 0 0 24px;
        border: 2px solid var(--puzzle-gold);
        color: var(--puzzle-gold);
        background: transparent;
        font-family: Silkscreen, monospace;
        cursor: var(--arrow-cursor);
    }
    .wordmark { font-size: 0.55rem; letter-spacing: 0.05em; margin-bottom: 32px; }
    .wordmark::after, .nav-text, .inventory-label { display: none; }
    .sidebar.is-open .wordmark::after, .sidebar.is-open .nav-text, .sidebar.is-open .inventory-label { display: block; }
    .nav-link { grid-template-columns: 30px 100px; gap: 10px; }
    .inventory-panel { left: 8px; right: 8px; padding: 12px 0; border-color: transparent; background: transparent; }
    .pixel-character { transform: scale(0.72); transform-origin: center; }
    .main-content { padding: 3rem 1.25rem 6rem; }
    .content-card { width: 100%; min-height: auto; margin-bottom: clamp(5rem, 14vh, 8rem); padding: 2rem; }
    .card-left, .card-right { margin-left: 0; margin-right: 0; }
}