/* RRIPPL.com — Watercolor Atlas of Distributed Resonance
   Palette: ocean-deep · Layout: immersive-scroll · Typography: Commissioner */

:root {
    /* Ocean-deep palette */
    --paper:        #f4efe6;
    --trench:       #0a1828;
    --cobalt:       #103a5c;
    --abyssal:      #1a5471;
    --pelagic:      #2a4a7a;
    --tide:         #4a7fa7;
    --foam:         #c8d8e4;
    --salt:         #eef4f8;
    --coral:        #c47855;
    --bio:          #4a8c7a;

    /* Scroll-driven custom properties (updated in JS) */
    --scroll-velocity: 0;
    --scroll-y: 0;

    /* Type scale */
    --display: clamp(3rem, 7vw, 6.5rem);
    --chapter: clamp(2.4rem, 5vw, 4.4rem);
    --body:    1.0625rem;
    --mono:    0.825rem;

    /* Layout */
    --margin-w: 8vw;
}

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

html {
    scroll-behavior: smooth;
    background: var(--paper);
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

body {
    font-family: "Source Serif 4", Georgia, "Times New Roman", serif;
    font-size: var(--body);
    line-height: 1.75;
    letter-spacing: 0.005em;
    color: var(--cobalt);
    background:
        radial-gradient(ellipse at 20% 0%,  rgba(16,58,92,0.05) 0%, transparent 60%),
        radial-gradient(ellipse at 80% 100%, rgba(42,74,122,0.06) 0%, transparent 60%),
        var(--paper);
    overflow-x: hidden;
    cursor: none;
}

a { color: var(--cobalt); text-decoration: none; }

em { font-style: italic; color: var(--cobalt); }
strong { font-weight: 600; color: var(--cobalt); }

/* ========== Paper grain ========== */
.paper-grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    mix-blend-mode: multiply;
    opacity: 0.7;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='2' seed='11'/><feColorMatrix values='0 0 0 0 0.06   0 0 0 0 0.10   0 0 0 0 0.18   0 0 0 0.04 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
    background-size: 240px 240px;
}

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

/* ========== Cursor & pigment trail ========== */
#ink-cursor {
    position: fixed;
    top: 0; left: 0;
    width: 16px; height: 16px;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: opacity 200ms ease;
    will-change: transform;
}
#ink-cursor svg { display: block; }

#pigment-trail {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9998;
    overflow: hidden;
    mix-blend-mode: multiply;
}
#pigment-trail .trail-dot {
    position: absolute;
    width: 22px; height: 22px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(16,58,92,0.32) 0%, rgba(16,58,92,0.10) 50%, rgba(16,58,92,0) 80%);
    transform: translate(-50%, -50%);
    transition: opacity 800ms cubic-bezier(0.16, 1, 0.3, 1), transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
    pointer-events: none;
    filter: blur(0.6px);
}

/* ========== Ribbon nav ========== */
.ribbon-nav {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 50;
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 0.6rem 1rem;
    background: rgba(244, 239, 230, 0.78);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-radius: 32px;
    box-shadow: 0 4px 30px rgba(10,24,40,0.10);
}
.ribbon-nav .wordmark {
    display: flex;
    align-items: center;
    gap: 0.55rem;
    font-family: "Commissioner", sans-serif;
    font-weight: 500;
    font-size: 0.95rem;
    letter-spacing: 0.18em;
    color: var(--cobalt);
}
.ribbon-nav .chapter-dots {
    list-style: none;
    display: flex;
    gap: 0.55rem;
    align-items: center;
}
.ribbon-nav .dot {
    width: 12px; height: 12px;
    border: 1px solid var(--cobalt);
    background: transparent;
    border-radius: 50%;
    padding: 0;
    cursor: pointer;
    transition: background 600ms ease, transform 300ms ease, box-shadow 600ms ease;
    position: relative;
}
.ribbon-nav .dot.active {
    background: var(--coral);
    border-color: var(--coral);
    box-shadow: 0 0 0 3px rgba(196,120,85,0.25);
}
.ribbon-nav .dot.passed {
    background: var(--cobalt);
    border-color: var(--cobalt);
}
.ribbon-nav .dot:hover {
    transform: scale(1.18);
    box-shadow: 0 0 0 8px rgba(16,58,92,0.18);
}

/* ========== Marginalia ========== */
.marginalia {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--margin-w);
    height: 100vh;
    padding: 6.2rem 0.6rem 1rem 1rem;
    z-index: 30;
    pointer-events: none;
    color: var(--cobalt);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.66rem;
    line-height: 1.5;
    letter-spacing: 0.04em;
    opacity: 0.7;
    transform: translateY(calc(var(--scroll-y) * -0.1px));
    will-change: transform;
}
.marginalia .margin-compass {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.3rem;
    margin-bottom: 1.4rem;
}
.marginalia .margin-coord {
    font-size: 0.62rem;
    color: var(--cobalt);
    opacity: 0.65;
}
.marginalia .margin-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 1.6rem;
    max-width: 80px;
}
.marginalia .swatch {
    width: 14px; height: 14px;
    background: var(--c);
    border-radius: 50%;
    box-shadow: inset 0 0 0 1px rgba(10,24,40,0.18);
    opacity: 0.8;
}
.marginalia .margin-notes {
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
    margin-bottom: 1.4rem;
}
.marginalia .margin-note {
    color: var(--abyssal);
    opacity: 0.55;
    transition: opacity 400ms ease, color 400ms ease;
}
.marginalia .margin-note.active {
    color: var(--coral);
    opacity: 1;
}
.marginalia .margin-anchor {
    margin-top: 1rem;
    opacity: 0.6;
}

/* ========== Mural & chapters ========== */
.mural {
    position: relative;
    z-index: 5;
    padding-left: var(--margin-w);
    padding-right: 4vw;
}

.chapter {
    position: relative;
    min-height: 100vh;
    padding: 12vh 0 14vh;
    overflow: visible;
}
.chapter-coda { padding-bottom: 18vh; }

.chapter-bg {
    position: absolute;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    pointer-events: none;
}
.chapter-bg .wash {
    position: absolute;
    mix-blend-mode: multiply;
    filter: saturate(calc(1 - var(--scroll-velocity) * 0.35));
    transition: filter 200ms ease-out;
}

.canvas-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 1.1rem 1.4rem;
    max-width: 1480px;
    margin: 0 auto;
}

/* Tide line dividers */
.tide-line {
    position: absolute;
    left: 18%;
    right: 22%;
    bottom: 4vh;
    width: 60%;
    height: 18px;
    pointer-events: none;
}

/* ========== CHAPTER 1 — OVERTURE ========== */
.overture-header {
    grid-column: 2 / 9;
    margin-top: 4vh;
}
.overture-header .folio {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.74rem;
    letter-spacing: 0.28em;
    color: var(--abyssal);
    margin-bottom: 1.6rem;
    text-transform: uppercase;
}
.display-title {
    font-family: "Commissioner", sans-serif;
    font-weight: 350;
    font-size: var(--display);
    line-height: 1.02;
    letter-spacing: -0.018em;
    color: var(--trench);
}
.display-title .line { display: block; }
.display-title em.coral { color: var(--coral); font-style: italic; font-weight: 400; }
.overture-header .subtitle {
    margin-top: 2.4rem;
    max-width: 50ch;
    color: var(--cobalt);
    font-size: 1.18rem;
    line-height: 1.65;
}

.overture-meta {
    grid-column: 10 / 13;
    margin-top: 6vh;
    border-left: 1px dashed var(--abyssal);
    padding-left: 1.4rem;
    align-self: start;
}
.meta-list {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.78rem;
    line-height: 1.7;
    color: var(--abyssal);
}
.meta-list > div {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 0.6rem;
    padding: 0.35rem 0;
    border-bottom: 1px dotted rgba(26,84,113,0.25);
}
.meta-list dt {
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--cobalt);
    opacity: 0.65;
}
.meta-list dd { color: var(--trench); }

.overture-quote {
    grid-column: 4 / 11;
    margin-top: 8vh;
    font-family: "Commissioner", sans-serif;
    font-weight: 350;
    font-size: clamp(1.4rem, 2.4vw, 2.05rem);
    line-height: 1.45;
    color: var(--cobalt);
    border-top: 1px solid rgba(16,58,92,0.2);
    border-bottom: 1px solid rgba(16,58,92,0.2);
    padding: 2rem 0 1.6rem;
}
.overture-quote cite {
    display: block;
    margin-top: 1.1rem;
    font-style: normal;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.72rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--abyssal);
}

.overture-plate {
    grid-column: 6 / 12;
    margin-top: 6vh;
    align-self: center;
}
.overture-caption {
    grid-column: 2 / 6;
    align-self: center;
    margin-top: 6vh;
    color: var(--cobalt);
    font-style: italic;
    line-height: 1.7;
}

/* ========== CHAPTER 2 — ARCHITECTURE ========== */
.chapter-title {
    font-family: "Commissioner", sans-serif;
    font-weight: 350;
    font-size: var(--chapter);
    color: var(--trench);
    letter-spacing: -0.012em;
    line-height: 1.0;
    grid-column: 2 / 9;
    margin-bottom: 2vh;
}
.chapter-title .chapter-num {
    display: inline-block;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.5em;
    color: var(--coral);
    margin-right: 0.6em;
    letter-spacing: 0.18em;
    transform: translateY(-0.4em);
    vertical-align: top;
}
.sticky-title {
    position: sticky;
    top: 8vh;
    z-index: 4;
    backdrop-filter: blur(0px);
}

.arch-prose {
    grid-column: 2 / 8;
    margin-top: 6vh;
    font-size: 1.08rem;
    line-height: 1.78;
    color: var(--cobalt);
}
.arch-prose .lede {
    font-size: 1.22rem;
    color: var(--trench);
    margin-bottom: 1.4rem;
}
.arch-prose p + p { margin-top: 1.4rem; }
.arch-prose strong { color: var(--coral); font-weight: 600; }

.arch-diagram {
    grid-column: 7 / 13;
    margin-top: 4vh;
    align-self: end;
}
.arch-defs {
    grid-column: 2 / 12;
    margin-top: 8vh;
    list-style: none;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.4rem 2.4rem;
    border-top: 1px solid rgba(16,58,92,0.18);
    padding-top: 2rem;
}
.arch-defs li {
    display: grid;
    grid-template-columns: 90px 1fr;
    gap: 1rem;
    align-items: baseline;
}
.arch-defs code {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.86rem;
    color: var(--coral);
    letter-spacing: 0.04em;
    background: rgba(196,120,85,0.08);
    padding: 0.18rem 0.5rem;
    border-radius: 4px;
}
.arch-defs span {
    font-size: 0.96rem;
    color: var(--cobalt);
    line-height: 1.6;
}

/* ========== CHAPTER 3 — RESONANCE ========== */
.pullquote {
    grid-column: 2 / 11;
    margin-top: 6vh;
    font-family: "Commissioner", sans-serif;
    font-weight: 300;
    font-size: clamp(1.6rem, 3.2vw, 2.7rem);
    line-height: 1.3;
    color: var(--trench);
    letter-spacing: -0.01em;
    border-left: 3px solid var(--coral);
    padding-left: 2rem;
}

.resonance-panel {
    grid-column: 2 / 7;
    margin-top: 7vh;
    color: var(--cobalt);
    line-height: 1.8;
}
.resonance-panel p + p { margin-top: 1.4rem; }
.resonance-panel .kbd {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.86rem;
    background: rgba(16,58,92,0.08);
    color: var(--cobalt);
    padding: 0.1rem 0.5rem;
    border-radius: 3px;
}

.resonance-figure {
    grid-column: 7 / 13;
    margin-top: 6vh;
    align-self: start;
}

.resonance-stats {
    grid-column: 2 / 13;
    margin-top: 8vh;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding-top: 2rem;
    border-top: 1px solid rgba(16,58,92,0.18);
}
.stat {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.stat .stat-num {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--abyssal);
}
.stat .stat-val {
    font-family: "Commissioner", sans-serif;
    font-weight: 350;
    font-size: clamp(2rem, 3.5vw, 2.8rem);
    color: var(--trench);
    line-height: 1;
    letter-spacing: -0.01em;
}
.stat .stat-cap {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.7rem;
    color: var(--cobalt);
    opacity: 0.7;
}

/* ========== CHAPTER 4 — CURRENTS ========== */
.currents-lede {
    grid-column: 2 / 10;
    margin-top: 5vh;
    font-family: "Commissioner", sans-serif;
    font-weight: 350;
    font-size: clamp(1.3rem, 2.2vw, 1.8rem);
    line-height: 1.55;
    color: var(--trench);
}

.currents-map {
    grid-column: 2 / 13;
    margin-top: 6vh;
}

.currents-log {
    grid-column: 3 / 11;
    margin-top: 6vh;
    font-family: "JetBrains Mono", monospace;
    font-size: 0.84rem;
    line-height: 2;
    list-style: none;
    counter-reset: log;
}
.currents-log li {
    counter-increment: log;
    color: var(--cobalt);
    display: grid;
    grid-template-columns: 110px 1fr;
    gap: 1.2rem;
    border-bottom: 1px dotted rgba(16,58,92,0.18);
    padding: 0.4rem 0;
}
.currents-log li::before {
    content: counter(log, decimal-leading-zero);
    color: var(--coral);
    font-size: 0.7rem;
    margin-right: 0.6rem;
}
.currents-log .t {
    color: var(--abyssal);
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.02em;
}
.currents-log .bio {
    color: var(--bio);
    font-size: 1rem;
    text-shadow: 0 0 8px rgba(74,140,122,0.6);
}
.currents-log em { color: var(--bio); font-style: italic; }

/* ========== CHAPTER 5 — CONFLUENCE ========== */
.conf-prose {
    grid-column: 2 / 8;
    margin-top: 6vh;
    font-size: 1.1rem;
    line-height: 1.78;
    color: var(--cobalt);
}

.confluence-plate {
    grid-column: 7 / 12;
    margin-top: 4vh;
    align-self: start;
}

.conf-snippet {
    grid-column: 2 / 9;
    margin-top: 7vh;
    background: rgba(10,24,40,0.92);
    color: var(--salt);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.86rem;
    line-height: 1.7;
    padding: 1.6rem 1.8rem;
    border-radius: 4px;
    border-left: 3px solid var(--coral);
    overflow-x: auto;
    box-shadow: 0 8px 30px rgba(10,24,40,0.18);
}
.conf-snippet code { font-family: inherit; color: inherit; }

.conf-tail {
    grid-column: 3 / 11;
    margin-top: 4vh;
    font-style: italic;
    color: var(--cobalt);
    line-height: 1.7;
}

/* ========== CHAPTER 6 — CODA ========== */
.chapter-coda .chapter-title { color: var(--salt); }
.chapter-coda .chapter-num { color: var(--coral); }

.coda-text {
    grid-column: 2 / 10;
    margin-top: 6vh;
    color: var(--salt);
    font-size: 1.18rem;
    line-height: 1.75;
    text-shadow: 0 0 1px rgba(0,0,0,0.2);
}
.coda-text em { color: var(--coral); font-style: italic; }

.coda-tide {
    grid-column: 1 / 13;
    margin-top: 6vh;
}

.colophon {
    grid-column: 3 / 11;
    margin-top: 6vh;
    color: var(--salt);
    font-size: 0.95rem;
    line-height: 1.85;
    border-top: 1px solid rgba(238,244,248,0.4);
    padding-top: 2rem;
}
.colophon h3 {
    font-family: "Commissioner", sans-serif;
    font-weight: 400;
    font-size: 1.4rem;
    color: var(--coral);
    margin-bottom: 1.4rem;
    letter-spacing: 0.04em;
}
.colophon p {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 1.4rem;
    padding: 0.5rem 0;
    border-bottom: 1px dotted rgba(200,216,228,0.25);
}
.colophon .col-label {
    font-family: "JetBrains Mono", monospace;
    font-size: 0.74rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: var(--foam);
    opacity: 0.8;
}
.colophon .col-val { color: var(--salt); }

.signoff {
    grid-column: 2 / 13;
    margin-top: 6vh;
    text-align: center;
    color: var(--coral);
    font-family: "JetBrains Mono", monospace;
    font-size: 0.84rem;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    opacity: 0.75;
}

/* ========== Plate / SVG specifics ========== */
.plate-svg {
    width: 100%;
    height: auto;
    display: block;
    overflow: visible;
}
.plate-svg .draw {
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    transition: stroke-dashoffset 2200ms cubic-bezier(0.16, 1, 0.3, 1);
}
.reveal.is-visible .plate-svg .draw {
    stroke-dashoffset: 0;
}
.plate-svg .tech-overlay .node {
    transition: r 260ms ease, fill 260ms ease, filter 600ms ease;
    cursor: pointer;
    pointer-events: auto;
}
.plate-svg .tech-overlay .node.hover-glow {
    filter: drop-shadow(0 0 6px var(--bio));
    r: 7;
}
.plate-svg .tech-overlay .conn {
    transition: opacity 400ms ease, stroke-width 400ms ease;
}
.plate-svg .tech-overlay .conn.glow {
    stroke-width: 2.4;
    opacity: 0.95;
    filter: drop-shadow(0 0 5px rgba(74,140,122,0.7));
}

.chapter-bg .wash-coral {
    mix-blend-mode: multiply;
}

/* ========== Reveal animation (watercolor-bloom) ========== */
.reveal {
    opacity: 0;
    filter: blur(8px);
    transform: scale(0.985);
    transition:
        opacity 1200ms cubic-bezier(0.16, 1, 0.3, 1),
        filter  1500ms cubic-bezier(0.16, 1, 0.3, 1),
        transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, filter, transform;
}
.reveal.is-visible {
    opacity: 1;
    filter: blur(0px);
    transform: scale(1);
}

/* ========== Hover blooms ========== */
.ribbon-nav .wordmark,
.ribbon-nav .dot {
    cursor: none;
}
.ribbon-nav .wordmark { position: relative; }
.ribbon-nav .wordmark::after {
    content: "";
    position: absolute;
    inset: -8px -10px;
    border-radius: 24px;
    box-shadow: 0 0 0 0 rgba(16,58,92,0.4);
    transition: box-shadow 800ms ease;
    pointer-events: none;
}
.ribbon-nav .wordmark:hover::after {
    box-shadow: 0 0 0 18px rgba(16,58,92,0);
}

/* ========== Responsive ========== */
@media (max-width: 1100px) {
    .canvas-grid { grid-template-columns: repeat(8, 1fr); }
    .overture-header { grid-column: 1 / 7; }
    .overture-meta   { grid-column: 1 / 9; margin-top: 3vh; }
    .overture-quote  { grid-column: 1 / 9; }
    .overture-plate  { grid-column: 1 / 9; }
    .overture-caption{ grid-column: 1 / 9; }
    .chapter-title   { grid-column: 1 / 9; }
    .arch-prose      { grid-column: 1 / 9; }
    .arch-diagram    { grid-column: 1 / 9; }
    .arch-defs       { grid-column: 1 / 9; grid-template-columns: 1fr; }
    .pullquote       { grid-column: 1 / 9; }
    .resonance-panel { grid-column: 1 / 9; }
    .resonance-figure{ grid-column: 1 / 9; }
    .resonance-stats { grid-column: 1 / 9; }
    .currents-lede   { grid-column: 1 / 9; }
    .currents-map    { grid-column: 1 / 9; }
    .currents-log    { grid-column: 1 / 9; }
    .conf-prose      { grid-column: 1 / 9; }
    .confluence-plate{ grid-column: 1 / 9; }
    .conf-snippet    { grid-column: 1 / 9; }
    .conf-tail       { grid-column: 1 / 9; }
    .coda-text       { grid-column: 1 / 9; }
    .colophon        { grid-column: 1 / 9; }
    .signoff         { grid-column: 1 / 9; }
}

@media (max-width: 720px) {
    :root { --margin-w: 4vw; }
    body { cursor: auto; }
    #ink-cursor, #pigment-trail { display: none; }
    .marginalia { display: none; }
    .mural { padding-left: 4vw; padding-right: 4vw; }
    .ribbon-nav { top: 0.8rem; right: 0.8rem; padding: 0.4rem 0.7rem; gap: 0.7rem; }
    .ribbon-nav .wordmark span { display: none; }
    .colophon p { grid-template-columns: 1fr; gap: 0.2rem; }
    .currents-log li { grid-template-columns: 80px 1fr; gap: 0.6rem; font-size: 0.78rem; }
    .meta-list > div { grid-template-columns: 1fr 1.4fr; }
}