:root {
    --aged-cream: #f5ede0;
    --deep-burgundy: #6b1d3a;
    --dried-rose: #b5636c;
    --walnut-brown: #3e2723;
    --pressed-gold: #c9a84c;
    --parchment-shadow: #d4c8b8;
    --studio-black: #1e1614;

    --font-display: 'Cormorant Garamond', serif;
    --font-body: 'Lora', serif;
    --font-marginalia: 'Caveat', cursive;

    --lurch-easing: cubic-bezier(0.68, -0.15, 0.27, 1.15);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background: var(--aged-cream);
    color: var(--walnut-brown);
    font-family: var(--font-body);
    font-size: clamp(1rem, 1.2vw, 1.15rem);
    line-height: 1.72;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}

.svg-defs {
    position: absolute;
    width: 0;
    height: 0;
}

/* Grain overlay */
.grain-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1000;
    opacity: 0.12;
    filter: url(#grain);
    background: var(--parchment-shadow);
    animation: grainShift 10s steps(3) infinite;
}

@keyframes grainShift {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(-1px, 1px); }
    66% { transform: translate(1px, -1px); }
}

/* Margin corridor */
.margin-corridor {
    position: fixed;
    left: 0;
    top: 0;
    width: 12vw;
    height: 100vh;
    z-index: 10;
    pointer-events: none;
    border-right: 1px solid var(--parchment-shadow);
}

.margin-number {
    position: absolute;
    font-family: var(--font-display);
    font-size: 200px;
    font-weight: 600;
    color: var(--walnut-brown);
    opacity: 0;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    transition: opacity 0.6s ease;
    line-height: 1;
}

.margin-number.active {
    opacity: 0.04;
}

.margin-leaf {
    position: absolute;
    color: var(--dried-rose);
    opacity: 0.05;
    transition: transform 0.1s linear;
}

.leaf-willow {
    width: 30px;
    left: 20%;
    top: 15%;
}

.leaf-oak {
    width: 50px;
    left: 30%;
    top: 45%;
}

.leaf-fern {
    width: 35px;
    left: 15%;
    top: 70%;
}

/* Chapters */
.parallax-container {
    position: relative;
}

.chapter {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-left: 12vw;
    overflow: hidden;
}

.chapter-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 0;
}

.chapter-content {
    position: relative;
    z-index: 1;
    max-width: 560px;
    margin-left: 38.2%;
    transform: translateY(0);
}

/* Watercolor washes */
.watercolor-1 {
    background:
        radial-gradient(ellipse 500px 400px at 70% 30%, rgba(181, 99, 108, 0.04), transparent 70%),
        radial-gradient(ellipse 300px 350px at 20% 70%, rgba(201, 168, 76, 0.03), transparent 60%);
}

.watercolor-2 {
    background:
        radial-gradient(ellipse 450px 500px at 75% 25%, rgba(181, 99, 108, 0.06), transparent 70%),
        radial-gradient(ellipse 350px 300px at 30% 60%, rgba(201, 168, 76, 0.04), transparent 60%);
}

.watercolor-3 {
    background:
        radial-gradient(ellipse 400px 450px at 60% 40%, rgba(201, 168, 76, 0.06), transparent 65%),
        radial-gradient(ellipse 300px 400px at 25% 75%, rgba(181, 99, 108, 0.03), transparent 70%);
}

.watercolor-4 {
    background:
        radial-gradient(ellipse 500px 350px at 40% 50%, rgba(181, 99, 108, 0.05), transparent 70%),
        radial-gradient(ellipse 350px 500px at 80% 30%, rgba(201, 168, 76, 0.04), transparent 60%);
}

.watercolor-5 {
    background:
        radial-gradient(ellipse 400px 400px at 50% 50%, rgba(107, 29, 58, 0.04), transparent 70%),
        radial-gradient(ellipse 500px 300px at 20% 40%, rgba(201, 168, 76, 0.05), transparent 65%);
}

/* Chapter 1 - The Workshop */
.site-title {
    font-family: var(--font-display);
    font-size: clamp(4rem, 12vw, 10rem);
    font-weight: 600;
    color: var(--deep-burgundy);
    letter-spacing: -0.03em;
    line-height: 1.05;
    opacity: 0;
    animation: fadeIn 1s ease 1.5s forwards, pulse 3s ease-in-out 2.5s infinite;
}

.tagline {
    font-family: var(--font-body);
    font-style: italic;
    color: var(--walnut-brown);
    margin-top: 1.5rem;
    opacity: 0;
    animation: fadeIn 1s ease 2s forwards;
}

.scroll-prompt {
    margin-top: 3rem;
    opacity: 0;
    animation: fadeIn 0.8s ease 2.5s forwards, pulse 3s ease-in-out 3.5s infinite;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.scroll-text {
    font-family: var(--font-marginalia);
    font-size: clamp(0.85rem, 1vw, 1rem);
    color: var(--dried-rose);
}

.scroll-arrow {
    width: 20px;
    height: 34px;
    color: var(--dried-rose);
}

@keyframes fadeIn {
    to { opacity: 1; }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.015); opacity: 0.92; }
}

/* Chapter 2 - The Ink */
.prose {
    font-family: var(--font-body);
    color: var(--walnut-brown);
    margin-bottom: 1.5rem;
    line-height: 1.72;
}

.highlight {
    font-family: var(--font-display);
    font-style: italic;
    font-weight: 600;
    color: var(--dried-rose);
}

/* Chapter 3 - The Press */
.press-composition {
    margin-bottom: 2rem;
}

.press-plate {
    width: 100%;
    max-width: 400px;
    height: auto;
}

.marginalia {
    font-family: var(--font-marginalia);
    font-size: clamp(0.85rem, 1vw, 1rem);
    color: var(--pressed-gold);
    line-height: 1.5;
}

/* Chapter 4 - The Proof */
.proof-text {
    margin-bottom: 2rem;
}

.reveal-line {
    font-family: var(--font-body);
    color: var(--walnut-brown);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.5s ease, transform 0.5s var(--lurch-easing);
}

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

.vein-divider {
    margin: 2rem 0;
    max-width: 400px;
}

.vein-divider svg {
    width: 100%;
    height: auto;
}

/* Chapter 5 - The Binding */
.closing-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 6vw, 4.8rem);
    font-weight: 600;
    color: var(--deep-burgundy);
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 1rem;
}

.closing-text {
    font-family: var(--font-body);
    font-style: italic;
    color: var(--walnut-brown);
    margin-bottom: 2.5rem;
}

.hand-link {
    font-family: var(--font-marginalia);
    font-size: clamp(1rem, 1.2vw, 1.2rem);
    color: var(--dried-rose);
    text-decoration: none;
    display: inline-block;
    position: relative;
    pointer-events: auto;
}

.link-underline {
    display: block;
    width: 100%;
    height: 8px;
    color: var(--dried-rose);
    margin-top: 2px;
}

.link-underline path {
    stroke-dasharray: 250;
    stroke-dashoffset: 250;
    transition: stroke-dashoffset 0.3s ease;
}

.hand-link:hover .link-underline path {
    stroke-dashoffset: 0;
}

.ink-splatters {
    position: absolute;
    bottom: 10%;
    right: 15%;
    width: 80px;
    height: 80px;
}

.ink-splatters svg {
    width: 100%;
    height: 100%;
}

/* Lurch entrance animation */
.chapter-content {
    opacity: 0;
    transform: translateY(20px) rotate(0.3deg);
    transition: opacity 0.6s ease, transform 0.4s var(--lurch-easing);
}

.chapter-content.in-view {
    opacity: 1;
    transform: translateY(0) rotate(0);
}

.chapter-1 .chapter-content {
    opacity: 1;
    transform: none;
    transition: none;
}

/* Responsive */
@media (max-width: 768px) {
    .margin-corridor {
        width: 6vw;
    }

    .margin-leaf {
        display: none;
    }

    .chapter {
        padding-left: 6vw;
    }

    .chapter-content {
        margin-left: 5%;
        max-width: 90%;
    }

    .margin-number {
        font-size: 120px;
    }
}