@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400&family=IBM+Plex+Mono:wght@300;400&family=Noto+Serif+SC:wght@300;400;500&display=swap');

/* ========================================
   Design Tokens
   ======================================== */

:root {
    /* Paper */
    --paper: #f4f1eb;
    --paper-dark: #e8e4dc;
    
    /* Ink */
    --ink: #1a1a1a;
    --ink-light: #6b6b6b;
    --ink-faint: #a0a0a0;
    --ink-ghost: #c8c8c8;
    
    /* The accident - cyan that doesn't belong */
    --accident: #4ee1d4;
    
    /* The bloom - violet on interaction */
    --bloom: #8b7089;
    --bloom-glow: rgba(139, 112, 137, 0.15);
    
    /* Measure */
    --measure: 38rem;
}

/* ========================================
   Reset & Base
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Cormorant Garamond', 'Noto Serif SC', Georgia, serif;
    background: var(--paper);
    color: var(--ink);
    line-height: 1.7;
    font-size: 18px;
    min-height: 100vh;
}

/* Paper texture */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    opacity: 0.35;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* ========================================
   Bloom Cursor
   ======================================== */

.bloom-cursor {
    position: fixed;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--bloom-glow) 0%, transparent 70%);
    pointer-events: none;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity 0.5s ease;
    z-index: 0;
}

body:hover .bloom-cursor {
    opacity: 1;
}

/* ========================================
   Links
   ======================================== */

a {
    color: inherit;
    text-decoration: underline;
    text-decoration-color: var(--ink-ghost);
    text-underline-offset: 0.15em;
    transition: text-decoration-color 0.2s ease, color 0.2s ease;
}

a:hover {
    color: var(--bloom);
    text-decoration-color: var(--bloom);
}

/* Nav links - no underline */
.spine-name,
.back-link,
.nav-link,
.pathway,
.tag {
    text-decoration: none;
}

/* ========================================
   Spine (persistent nav)
   ======================================== */

.spine {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 2rem 4rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: linear-gradient(
        to bottom,
        rgba(244, 241, 235, 0.95) 0%,
        rgba(244, 241, 235, 0.85) 40%,
        rgba(244, 241, 235, 0.6) 70%,
        transparent 100%
    );
}

.spine-name {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.3em;
    color: var(--ink-light);
    position: relative;
}

/* The accident - a small wandering thing that got lost on your name */
.spine-name::after {
    content: '';
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--accident);
    border-radius: 50%;
    /* Starts somewhere in the middle */
    left: 50%;
    top: 50%;
    animation:
        wander 23s ease-in-out infinite,
        breathe 2.8s ease-in-out infinite,
        flicker 7s ease-in-out infinite;
    box-shadow:
        0 0 8px var(--accident),
        0 0 16px rgba(78, 225, 212, 0.3);
    z-index: 10;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    .spine-name::after {
        animation: none;
    }
}

@keyframes breathe {
    0%, 100% {
        transform: scale(1);
    }
    40% {
        transform: scale(1.4);
    }
    60% {
        transform: scale(1.1);
    }
}

@keyframes flicker {
    0%, 100% {
        opacity: 0.75;
    }
    15% {
        opacity: 0.9;
    }
    30% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
    70% {
        opacity: 0.8;
    }
    85% {
        opacity: 0.95;
    }
}

@keyframes wander {
    0% {
        translate: 0 0;
    }
    6% {
        translate: 35px -8px;
    }
    12% {
        translate: 50px 2px;
    }
    18% {
        translate: 42px -12px;
    }
    25% {
        translate: 20px -6px;
    }
    31% {
        translate: -15px 4px;
    }
    38% {
        translate: -40px -2px;
    }
    44% {
        translate: -55px 8px;
    }
    50% {
        translate: -48px -10px;
    }
    56% {
        translate: -30px 0px;
    }
    63% {
        translate: -10px 10px;
    }
    69% {
        translate: 15px 6px;
    }
    75% {
        translate: 38px -4px;
    }
    81% {
        translate: 25px 8px;
    }
    88% {
        translate: 5px -8px;
    }
    94% {
        translate: -20px 3px;
    }
    100% {
        translate: 0 0;
    }
}

.spine-marker {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--ink-faint);
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4 {
    font-weight: 400;
}

h1 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    line-height: 1.3;
}

h2 {
    font-size: 1.3rem;
    margin: 3rem 0 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--ink-ghost);
}

h3 {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--ink-light);
    margin: 2rem 0 1rem;
}

p {
    margin-bottom: 1.5rem;
}

/* ========================================
   Mono text (labels, meta)
   ======================================== */

.mono {
    font-family: 'IBM Plex Mono', monospace;
}

.label {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    letter-spacing: 0.15em;
    color: var(--ink-faint);
    text-transform: uppercase;
}

/* ========================================
   The Accident
   ======================================== */

.accident {
    color: var(--accident) !important;
}

/* ========================================
   Spreads (page sections)
   ======================================== */

.spread {
    min-height: 100vh;
    padding: 8vh 8vw;
    position: relative;
}

/* ========================================
   Horizon line
   ======================================== */

.horizon {
    width: 100%;
    height: 1px;
    background: var(--ink-ghost);
    margin: 4rem 0;
}

/* ========================================
   Footer
   ======================================== */

.page-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4rem 0;
    border-top: 1px solid var(--ink-ghost);
    margin-top: 4rem;
}

.page-number {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    color: var(--ink-faint);
}

.back-link {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--ink-faint);
}

/* ========================================
   Rendering marker
   ======================================== */

.rendering {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.6rem;
    color: var(--ink-faint);
    opacity: 0.3;
    transition: opacity 0.3s ease, color 0.3s ease;
}

.rendering:hover {
    opacity: 0.8;
    color: var(--bloom);
}

/* ========================================
   Tags
   ======================================== */

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.6rem;
    color: var(--ink-faint);
    padding: 0.3rem 0.6rem;
    border: 1px solid var(--ink-ghost);
    transition: all 0.2s ease;
}

.tag:hover {
    color: var(--bloom);
    border-color: var(--bloom);
}

/* ========================================
   Marginalia / Footnotes
   ======================================== */

/* Position marginalia in the grid */
.article-body .marginalia {
    position: absolute;
    right: -300px;
    width: 260px;
    top: 0;
}

.margin-note {
    font-size: 0.8rem;
    color: var(--ink-faint);
    line-height: 1.6;
    font-style: italic;
    margin-bottom: 1.5rem;
}

.fn-num {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.6rem;
    color: var(--ink-ghost);
    font-style: normal;
    margin-right: 0.5rem;
}

.fn-ref {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.6rem;
    color: var(--ink-faint);
    vertical-align: super;
    text-decoration: none;
    margin-left: 0.1rem;
}

.fn-ref:hover {
    color: var(--bloom);
}

/* ========================================
   Article Body - Markdown Elements
   ======================================== */

.article-body {
    position: relative;
}

.article-body h1 {
    font-size: 1.8rem;
    margin: 3rem 0 1.5rem;
}

.article-body h2 {
    font-size: 1.4rem;
    margin: 3rem 0 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--ink-ghost);
}

.article-body h3 {
    font-size: 1.15rem;
    font-style: italic;
    color: var(--ink-light);
    margin: 2rem 0 1rem;
}

.article-body h4 {
    font-size: 1rem;
    font-weight: 500;
    margin: 1.5rem 0 1rem;
}

.article-body p {
    margin-bottom: 1.5rem;
}

.article-body ul,
.article-body ol {
    margin: 1.5rem 0;
    padding-left: 1.5rem;
}

.article-body li {
    margin-bottom: 0.75rem;
}

.article-body li::marker {
    color: var(--ink-faint);
}

.article-body blockquote {
    margin: 2rem 0;
    padding-left: 1.5rem;
    border-left: 2px solid var(--ink-ghost);
    color: var(--ink-light);
    font-style: italic;
}

.article-body blockquote p {
    margin-bottom: 1rem;
}

.article-body blockquote p:last-child {
    margin-bottom: 0;
}

.article-body pre {
    background: var(--paper-dark);
    padding: 1.5rem;
    margin: 2rem 0;
    overflow-x: auto;
    border-radius: 2px;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
}

.article-body code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.9em;
    background: var(--paper-dark);
    padding: 0.15em 0.4em;
    border-radius: 2px;
}

.article-body pre code {
    background: none;
    padding: 0;
    font-size: 1em;
}

.article-body hr {
    border: none;
    height: 1px;
    background: var(--ink-ghost);
    margin: 3rem 0;
}

.article-body strong {
    font-weight: 500;
}

.article-body em {
    font-style: italic;
}

.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 2rem 0;
    font-size: 0.9rem;
}

.article-body th,
.article-body td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--ink-ghost);
}

.article-body th {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-faint);
    font-weight: 400;
}

.article-body img {
    max-width: calc(100% + 4rem);
    margin: 3rem -2rem;
    height: auto;
    filter: grayscale(15%);
    border: 1px solid var(--ink-ghost);
    background: var(--paper-dark);
    padding: 1rem;
    transition: filter 0.3s ease;
}

.article-body img:hover {
    filter: grayscale(0%);
}

.article-body figure {
    margin: 3rem -2rem;
    max-width: calc(100% + 4rem);
}

.article-body figure img {
    margin: 0;
    max-width: 100%;
}

.article-body figcaption {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--ink-faint);
    text-align: center;
    margin-top: 0.75rem;
    padding: 0 1rem;
}

/* ========================================
   Concept boxes
   ======================================== */

.concept {
    background: var(--paper-dark);
    padding: 1.5rem 2rem;
    margin: 2rem 0;
    border-radius: 2px;
}

.concept-term {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--ink);
    text-transform: uppercase;
    display: block;
    margin-bottom: 0.75rem;
}

.concept-definition {
    font-size: 0.95rem;
    color: var(--ink-light);
    line-height: 1.8;
    font-style: italic;
}

/* ========================================
   Specimens (images)
   ======================================== */

.specimen {
    background: var(--paper-dark);
    overflow: hidden;
    opacity: 0.5;
    filter: grayscale(100%);
    transition: all 0.5s ease;
}

.specimen:hover {
    opacity: 1;
    filter: grayscale(0%);
    box-shadow: 0 20px 60px var(--bloom-glow);
}

.specimen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    cursor: zoom-in;
}

/* ========================================
   Focus States (Accessibility)
   ======================================== */

:focus-visible {
    outline: 2px solid var(--bloom);
    outline-offset: 3px;
}

/* Links - subtle underline change on focus */
a:focus-visible {
    color: var(--bloom);
    text-decoration-color: var(--bloom);
}

/* Tags - match hover behavior */
.tag:focus-visible {
    border-color: var(--bloom);
    color: var(--bloom);
}

/* Navigation dots */
.book-nav-dot:focus-visible {
    background: var(--bloom);
    outline: none;
}

/* Specimens (image triggers) */
.specimen:focus-visible {
    outline: 2px solid var(--bloom);
    outline-offset: 4px;
    opacity: 1;
    filter: grayscale(0%);
}

/* ========================================
   Lightbox
   ======================================== */

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 26, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    cursor: zoom-out;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    filter: none;
    opacity: 1;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.lightbox.active img {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: 2rem;
    right: 2rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--ink-faint);
    background: none;
    border: none;
    cursor: pointer;
    transition: color 0.2s ease;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
    color: var(--paper);
    outline: none;
}

/* ========================================
   Reduced Motion (Accessibility)
   ======================================== */

@media (prefers-reduced-motion: reduce) {
    /* Disable smooth scrolling */
    html {
        scroll-behavior: auto;
    }

    /* Hide bloom cursor entirely */
    .bloom-cursor {
        display: none;
    }

    /* Stop infinite animations on accident dot */
    .spine-name::after {
        animation: none;
    }

    /* Reduce all transitions to near-instant */
    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
    }

    /* Lightbox - no scale animation */
    .lightbox img {
        transform: none;
    }
}

/* ========================================
   Responsive
   ======================================== */

@media (max-width: 1100px) {
    .article-body .marginalia {
        display: none;
    }
}

@media (max-width: 768px) {
    .spine {
        padding: 1.5rem 2rem;
    }

    .spread {
        padding: 6vh 6vw;
    }

    /* Full color images on mobile (no hover to earn) */
    .article-body img,
    .article-body img:hover {
        filter: none;
    }

    /* Specimens full color on mobile */
    .specimen,
    .specimen:hover {
        filter: none;
        opacity: 1;
    }
}

/* ========================================
   Writing Book - Scroll Snap Container
   ======================================== */

.writing-book {
    height: 100vh;
    overflow-y: scroll;
    scroll-snap-type: y mandatory;
    scroll-behavior: smooth;
}

.writing-book::-webkit-scrollbar {
    width: 0;
    background: transparent;
}

/* ========================================
   Essay Spread
   ======================================== */

.essay-spread {
    height: 100vh;
    scroll-snap-align: start;
    scroll-snap-stop: always;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 12vw;
    position: relative;
    box-sizing: border-box;
}

/* Header spread */
.essay-spread.header-spread {
    align-items: flex-start;
}

.header-poem {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(0.55rem, 1vw, 0.75rem);
    line-height: 1.3;
    color: var(--ink-ghost);
    margin-bottom: 2rem;
    white-space: pre;
}

.header-poem .a {
    color: var(--accident);
}

.header-title {
    font-size: clamp(2rem, 5vw, 4rem);
    font-weight: 300;
    margin-bottom: 1rem;
}

.header-count {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--ink-faint);
    margin-bottom: 2rem;
}

.header-description {
    font-family: 'IBM Plex Mono', monospace;
    font-size: clamp(0.7rem, 1.2vw, 0.85rem);
    color: var(--ink-light);
    line-height: 1.6;
    margin-bottom: 2rem;
    white-space: pre;
}

.header-description .a {
    color: var(--accident);
}

.header-nav {
    display: flex;
    gap: 2rem;
    align-items: center;
    margin-top: 1rem;
}

.header-nav .scroll-hint {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--ink-ghost);
}

/* Essay content */
.essay-series {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    color: var(--ink-faint);
    text-transform: uppercase;
    margin-bottom: 2rem;
}

.essay-title {
    font-size: clamp(2rem, 4vw, 3.5rem);
    font-weight: 300;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

.essay-subtitle {
    font-size: 1.3rem;
    font-style: italic;
    color: var(--ink-light);
    margin-bottom: 2rem;
}

.essay-horizon {
    width: 200px;
    height: 1px;
    background: var(--ink-ghost);
    margin: 2rem 0;
}

.essay-opening {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--ink-light);
    line-height: 1.9;
    max-width: 500px;
}

.essay-meta {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--ink-faint);
    margin-top: 2rem;
    line-height: 1.8;
}

.essay-read-link {
    position: absolute;
    bottom: 8rem;
    right: 12vw;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.75rem;
    color: var(--ink-faint);
    text-decoration: none;
    transition: color 0.2s ease;
}

.essay-read-link:hover {
    color: var(--bloom);
}

.spread-position {
    position: absolute;
    top: 8rem;
    right: 12vw;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    color: var(--ink-ghost);
}

/* Scroll hint for writing book */
.essay-spread .scroll-hint {
    position: absolute;
    bottom: 4rem;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.65rem;
    color: var(--ink-ghost);
    transition: opacity 0.5s ease;
}

.essay-spread .scroll-hint.hidden {
    opacity: 0;
    pointer-events: none;
}

/* Empty tag state */
.empty-tag {
    padding: 12rem 4rem 6rem;
    max-width: 600px;
    margin: 0 auto;
}

.empty-tag h1 {
    font-size: 2rem;
    font-weight: 300;
    margin-bottom: 1rem;
}

.empty-tag p {
    color: var(--ink-light);
    margin-bottom: 2rem;
}

/* Writing book responsive */
@media (max-width: 768px) {
    /* Remove scroll-snap on mobile */
    .writing-book {
        scroll-snap-type: none;
        height: auto;
        overflow-y: visible;
    }

    .essay-spread {
        scroll-snap-align: none;
        scroll-snap-stop: normal;
        height: auto;
        min-height: auto;
        padding: 3rem 1.5rem;
    }

    .essay-title {
        font-size: 1.8rem;
    }

    .essay-read-link {
        position: static;
        margin-top: 2rem;
        display: inline-block;
    }

    .spread-position {
        top: 3rem;
        right: 1.5rem;
    }
}

/* ========================================
   Print
   ======================================== */

@media print {
    .spine,
    .bloom-cursor,
    .rendering {
        display: none;
    }
    
    body::before {
        display: none;
    }
}