/* ===========================================================
   ronri.net — the logic network
   bioluminescent dark-neon palette · organic-flow layered-depth
   =========================================================== */

:root {
    /* palette */
    --abyss: #060B14;
    --deep-current: #0E1A2B;
    --node-slate: #1C2D42;
    --node-white: #E4ECF4;
    --network-lavender: #9B8EC4;
    --synapse-green: #3EFFA8;
    --convergence-gold: #F0C75E;
    --pulse-cyan: #00D4FF;
    --abyss-deep: #02060D;

    /* typography */
    --font-mono: "Source Code Pro", ui-monospace, monospace;
    --font-op: "Overpass Mono", "Source Code Pro", monospace;
    --font-title: "Outfit", "Source Code Pro", sans-serif;
    --font-serif: "DM Serif Display", "Lora", serif;
}

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

html, body {
    background: var(--abyss);
    color: var(--node-white);
    font-family: var(--font-mono);
    font-size: 16px;
    line-height: 1.5;
    overflow-x: hidden;
}

body {
    /* deep gradient suggesting abyssal depth */
    background:
        radial-gradient(ellipse at 18% 12%, rgba(62,255,168,0.05) 0%, transparent 45%),
        radial-gradient(ellipse at 85% 20%, rgba(0,212,255,0.04) 0%, transparent 50%),
        radial-gradient(ellipse at 50% 95%, rgba(240,199,94,0.04) 0%, transparent 55%),
        var(--abyss);
    min-height: 100vh;
    position: relative;
}

/* ---------------------------------------------------------------
   PARTICLE FIELD — drifting cyan motes
--------------------------------------------------------------- */
.particle-field {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 3px;
    height: 3px;
    border-radius: 50%;
    background: var(--pulse-cyan);
    opacity: 0.08;
    box-shadow: 0 0 6px rgba(0, 212, 255, 0.3);
    animation-name: particle-drift;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
}

@keyframes particle-drift {
    0%   { transform: translate(0, 0); opacity: 0; }
    8%   { opacity: 0.10; }
    50%  { opacity: 0.12; }
    92%  { opacity: 0.08; }
    100% { transform: translate(var(--dx, 60px), var(--dy, -120px)); opacity: 0; }
}

/* ---------------------------------------------------------------
   HEADER — sparse logomark + depth navigation
--------------------------------------------------------------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 28px 56px;
    pointer-events: none;
}

.site-header > * { pointer-events: auto; }

.logomark {
    display: flex;
    align-items: baseline;
    gap: 14px;
    color: var(--network-lavender);
}

.logomark-kanji {
    font-family: var(--font-serif);
    font-size: 26px;
    color: var(--synapse-green);
    text-shadow: 0 0 10px rgba(62, 255, 168, 0.45);
    letter-spacing: 0.05em;
}

.logomark-domain {
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 0.18em;
    text-transform: lowercase;
    color: var(--network-lavender);
    opacity: 0.75;
}

.depth-nav {
    display: flex;
    align-items: center;
    gap: 28px;
}

.depth-nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--network-lavender);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    opacity: 0.45;
    transition: opacity 0.4s ease, color 0.4s ease;
}

.depth-nav-item .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--network-lavender);
    transition: background 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

.depth-nav-item.is-active,
.depth-nav-item:hover {
    opacity: 1;
    color: var(--synapse-green);
}

.depth-nav-item.is-active .dot,
.depth-nav-item:hover .dot {
    background: var(--synapse-green);
    border-color: var(--synapse-green);
    box-shadow: 0 0 10px rgba(62, 255, 168, 0.7);
}

/* ---------------------------------------------------------------
   DEPTH SECTIONS
--------------------------------------------------------------- */
main {
    position: relative;
    z-index: 5;
}

.depth {
    position: relative;
    width: 100%;
    padding: 120px 0 80px;
    overflow: hidden;
}

.depth-1 { min-height: 100vh; }
.depth-2 { min-height: 120vh; }
.depth-3 { min-height: 150vh; }
.depth-4 { min-height: 100vh; padding-bottom: 40px; }

.depth-header {
    position: relative;
    z-index: 4;
    max-width: 720px;
    margin: 0 auto 24px;
    padding: 0 56px;
    text-align: center;
}

.depth-index {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--synapse-green);
    opacity: 0.65;
    margin-bottom: 18px;
}

.depth-title {
    font-family: var(--font-title);
    font-weight: 300;
    font-size: clamp(40px, 6vw, 80px);
    color: var(--network-lavender);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    line-height: 1.1;
    margin-bottom: 18px;
    text-shadow: 0 0 24px rgba(155, 142, 196, 0.18);
}

.depth-sub {
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.7;
    color: var(--node-white);
    opacity: 0.55;
    max-width: 540px;
    margin: 0 auto;
    letter-spacing: 0.02em;
}

/* ---------------------------------------------------------------
   NETWORK SVG
--------------------------------------------------------------- */
.network-svg {
    display: block;
    width: 100%;
    max-width: 1600px;
    margin: 0 auto;
    height: auto;
    overflow: visible;
}

.depth-1 .network-svg { aspect-ratio: 1600 / 900; }
.depth-2 .network-svg { aspect-ratio: 1600 / 1080; }
.depth-3 .network-svg { aspect-ratio: 1600 / 1350; }
.depth-4 .network-svg { aspect-ratio: 1600 / 1000; }

/* nodes */
.node {
    fill: var(--node-slate);
    stroke: var(--synapse-green);
    stroke-width: 2;
    stroke-opacity: 0.4;
    transition: stroke-opacity 0.4s ease, filter 0.4s ease, fill 0.4s ease;
}

.node-axiom {
    fill: var(--deep-current);
    stroke: var(--synapse-green);
    stroke-opacity: 0.65;
    filter: drop-shadow(0 0 10px rgba(62, 255, 168, 0.35));
}

.node-prop.major {
    stroke: var(--pulse-cyan);
    stroke-opacity: 0.65;
    filter: drop-shadow(0 0 10px rgba(0, 212, 255, 0.35));
}

.node-group {
    cursor: default;
    transition: transform 0.6s ease;
    transform-box: fill-box;
    transform-origin: center;
}

.node-group:hover .node {
    stroke-opacity: 1;
    filter: drop-shadow(0 0 12px rgba(62, 255, 168, 0.85));
}

.node-group.axiom:hover .node-axiom {
    filter: drop-shadow(0 0 18px rgba(62, 255, 168, 0.9));
}

/* node text */
.node-label {
    fill: var(--node-white);
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.08em;
    text-anchor: middle;
    text-transform: uppercase;
    pointer-events: none;
}

.node-label.small {
    font-size: 11px;
    letter-spacing: 0.06em;
}

.node-sublabel {
    fill: var(--synapse-green);
    font-family: var(--font-op);
    font-size: 13px;
    text-anchor: middle;
    font-weight: 600;
    letter-spacing: 0.04em;
    pointer-events: none;
}

.node-meta {
    fill: var(--network-lavender);
    font-family: var(--font-op);
    font-size: 11px;
    text-anchor: middle;
    letter-spacing: 0.05em;
    opacity: 0.85;
    pointer-events: none;
}

/* pulse rings — bioluminescent breathing */
.pulse-ring {
    fill: none;
    stroke: var(--synapse-green);
    stroke-width: 1.5;
    stroke-opacity: 0.25;
    transform-box: fill-box;
    transform-origin: center;
    animation: pulse-expand 6s ease-out infinite;
}

.pulse-ring.delay-1 { animation-delay: 2s; }
.pulse-ring.delay-2 { animation-delay: 4s; }
.pulse-ring.delay-3 { animation-delay: 1s; }
.pulse-ring.small { animation-duration: 5s; stroke: var(--pulse-cyan); stroke-opacity: 0.18; }

@keyframes pulse-expand {
    0%   { transform: scale(1);   opacity: 0.30; }
    60%  { opacity: 0.10; }
    100% { transform: scale(2);   opacity: 0;    }
}

/* edges */
.edge {
    fill: none;
    stroke: var(--synapse-green);
    stroke-width: 1.2;
    stroke-opacity: 0.18;
    stroke-linecap: round;
    transition: stroke-opacity 0.4s ease, stroke-width 0.4s ease, stroke 0.4s ease;
}

.edge.bridge {
    stroke: var(--network-lavender);
    stroke-width: 1.4;
    stroke-opacity: 0.22;
    stroke-dasharray: 4 6;
}

.edge.draw-in {
    stroke-dasharray: var(--len, 600);
    stroke-dashoffset: var(--len, 600);
    animation: draw-edge 1.5s ease-out forwards;
    animation-delay: var(--delay, 0ms);
}

@keyframes draw-edge {
    to { stroke-dashoffset: 0; }
}

.edge.is-highlit {
    stroke-opacity: 0.85;
    stroke-width: 1.8;
    stroke: var(--synapse-green);
    filter: drop-shadow(0 0 6px rgba(62, 255, 168, 0.5));
}

.edge.is-dimmed {
    stroke-opacity: 0.05;
}

/* op labels (logical operators floating near edges) */
.op-label {
    fill: var(--synapse-green);
    font-family: var(--font-op);
    font-size: 16px;
    font-weight: 600;
    text-anchor: middle;
    letter-spacing: 0.02em;
    opacity: 0.7;
    pointer-events: none;
}

.floating-annotation {
    fill: var(--network-lavender);
    font-family: var(--font-mono);
    font-size: 11px;
    opacity: 0.4;
    letter-spacing: 0.05em;
}

/* ---------------------------------------------------------------
   DEPTH 1 — axiom nodes scroll cue
--------------------------------------------------------------- */
.scroll-cue {
    position: absolute;
    bottom: 36px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    color: var(--network-lavender);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    opacity: 0.55;
}

.scroll-cue .arrow {
    font-size: 18px;
    color: var(--synapse-green);
    animation: cue-bob 2.4s ease-in-out infinite;
}

@keyframes cue-bob {
    0%, 100% { transform: translateY(0); opacity: 0.55; }
    50%      { transform: translateY(6px); opacity: 1; }
}

/* ---------------------------------------------------------------
   DEPTH 3 — cluster boundaries
--------------------------------------------------------------- */
.cluster-hull {
    fill: rgba(155, 142, 196, 0.025);
    stroke: var(--network-lavender);
    stroke-width: 1;
    stroke-opacity: 0.10;
    stroke-dasharray: 6 8;
    transform-box: fill-box;
    transform-origin: center;
    animation: hull-breathe 8s ease-in-out infinite;
}

.cluster-hull.hull-b { animation-delay: 2.7s; }
.cluster-hull.hull-c { animation-delay: 5.1s; }

@keyframes hull-breathe {
    0%, 100% { stroke-opacity: 0.08; transform: scale(1);    }
    50%      { stroke-opacity: 0.16; transform: scale(1.015); }
}

.cluster-label {
    fill: var(--network-lavender);
    font-family: var(--font-title);
    font-weight: 300;
    font-size: 14px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    opacity: 0.4;
    pointer-events: none;
}

/* depth 3 hover isolation */
.network-svg.interactive .node-group {
    transition: opacity 0.35s ease;
}

.network-svg.interactive.is-isolating .node-group:not(.is-related) {
    opacity: 0.22;
}

.network-svg.interactive.is-isolating .edge:not(.is-highlit) {
    stroke-opacity: 0.04;
}

.network-svg.interactive .node-group.is-related .node {
    stroke-opacity: 1;
    filter: drop-shadow(0 0 12px rgba(62, 255, 168, 0.85));
}

.network-svg.interactive .node-group.is-source .node {
    fill: var(--node-slate);
    stroke: var(--pulse-cyan);
    filter: drop-shadow(0 0 16px rgba(0, 212, 255, 0.95));
}

/* legend */
.legend {
    position: absolute;
    bottom: 80px;
    left: 56px;
    background: rgba(14, 26, 43, 0.55);
    border: 1px solid rgba(155, 142, 196, 0.18);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 20px 24px;
    max-width: 240px;
    font-family: var(--font-mono);
}

.legend h4 {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--synapse-green);
    margin-bottom: 14px;
    font-weight: 500;
}

.legend ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 14px;
}

.legend li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 11px;
    color: var(--node-white);
    opacity: 0.75;
    letter-spacing: 0.04em;
}

.legend-swatch {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 1.5px solid var(--synapse-green);
    background: var(--node-slate);
    flex-shrink: 0;
}

.legend-swatch.swatch-axiom {
    background: var(--deep-current);
    border-color: var(--synapse-green);
    box-shadow: 0 0 6px rgba(62, 255, 168, 0.6);
}

.legend-swatch.swatch-prop {
    background: var(--node-slate);
    border-color: var(--synapse-green);
}

.legend-swatch.swatch-lemma {
    background: var(--node-slate);
    border-color: var(--pulse-cyan);
}

.legend-swatch.swatch-bridge {
    background: transparent;
    border-color: var(--network-lavender);
    border-style: dashed;
    border-radius: 0;
}

.legend-hint {
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--network-lavender);
    opacity: 0.7;
}

/* ---------------------------------------------------------------
   DEPTH 4 — convergence
--------------------------------------------------------------- */
.edge.funnel {
    stroke: var(--synapse-green);
    stroke-opacity: 0.18;
    stroke-width: 1.2;
    transition: stroke-opacity 0.6s ease, stroke 0.6s ease, stroke-width 0.6s ease;
}

.edge.funnel.is-converged {
    stroke: var(--convergence-gold);
    stroke-opacity: 0.85;
    stroke-width: 1.6;
    filter: drop-shadow(0 0 6px rgba(240, 199, 94, 0.6));
}

.conclusion-aura {
    fill: url(#conclusionFill);
    opacity: 0;
    transform-box: fill-box;
    transform-origin: center;
    animation: aura-pulse 5s ease-in-out infinite;
    transition: opacity 1s ease;
}

.depth-4.is-converging .conclusion-aura { opacity: 0.85; }

@keyframes aura-pulse {
    0%, 100% { transform: scale(0.95); }
    50%      { transform: scale(1.08); }
}

.conclusion-fill {
    fill: var(--deep-current);
    transition: fill 1.2s ease;
}

.depth-4.is-converging .conclusion-fill {
    fill: url(#conclusionFill);
}

.conclusion-stroke {
    fill: none;
    stroke: var(--convergence-gold);
    stroke-width: 1.5;
    stroke-opacity: 0.4;
    transition: stroke-opacity 1s ease, stroke-width 1s ease;
}

.depth-4.is-converging .conclusion-stroke {
    stroke-opacity: 1;
    stroke-width: 2;
    filter: drop-shadow(0 0 16px rgba(240, 199, 94, 0.7));
}

.conclusion-kanji {
    fill: var(--node-white);
    font-family: var(--font-serif);
    font-size: 64px;
    text-anchor: middle;
    letter-spacing: 0.04em;
    opacity: 0;
    transition: opacity 1.4s ease, fill 1.4s ease;
}

.depth-4.is-converging .conclusion-kanji {
    opacity: 1;
    fill: var(--convergence-gold);
}

.conclusion-romaji {
    fill: var(--network-lavender);
    font-family: var(--font-mono);
    font-size: 14px;
    text-anchor: middle;
    letter-spacing: 0.4em;
    text-transform: uppercase;
    opacity: 0;
    transition: opacity 1.6s ease;
}

.depth-4.is-converging .conclusion-romaji { opacity: 0.9; }

.convergence-meter {
    fill: var(--synapse-green);
    font-family: var(--font-mono);
    font-size: 11px;
    text-anchor: middle;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    opacity: 0.7;
}

/* conclusion statement */
.conclusion-statement {
    max-width: 800px;
    margin: 40px auto 0;
    padding: 0 56px;
    text-align: center;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 1.2s ease, transform 1.2s ease;
}

.conclusion-statement.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.conclusion-text {
    font-family: var(--font-serif);
    font-size: clamp(22px, 2.4vw, 32px);
    line-height: 1.45;
    color: var(--node-white);
    font-weight: 400;
    letter-spacing: 0.005em;
    margin-bottom: 24px;
}

.conclusion-text em {
    color: var(--convergence-gold);
    font-style: italic;
}

.conclusion-sig {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.32em;
    text-transform: lowercase;
    color: var(--synapse-green);
    opacity: 0.7;
}

/* ---------------------------------------------------------------
   FOOTER
--------------------------------------------------------------- */
.site-footer {
    position: relative;
    z-index: 5;
    padding: 60px 56px 40px;
    border-top: 1px solid rgba(155, 142, 196, 0.12);
    background: rgba(2, 6, 13, 0.65);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr 1fr;
    gap: 36px;
    max-width: 1400px;
    margin: 0 auto;
    align-items: start;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--network-lavender);
    letter-spacing: 0.08em;
    opacity: 0.65;
}

.footer-mark {
    font-family: var(--font-serif);
    font-size: 28px;
    color: var(--synapse-green);
    text-shadow: 0 0 12px rgba(62, 255, 168, 0.4);
    margin-bottom: 6px;
    letter-spacing: 0.05em;
}

.footer-meta {
    line-height: 1.7;
    color: var(--node-white);
    opacity: 0.5;
}

.footer-coords {
    font-size: 10px;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    color: var(--synapse-green);
    opacity: 0.55;
}

/* ---------------------------------------------------------------
   FADE-REVEAL  utility for nodes appearing into view
--------------------------------------------------------------- */
.fade-in {
    opacity: 0;
    transform: scale(0.5);
    transform-box: fill-box;
    transform-origin: center;
    transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.fade-in.is-revealed {
    opacity: 1;
    transform: scale(1);
}

.fade-in-soft {
    opacity: 0;
    transition: opacity 1s ease;
}

.fade-in-soft.is-revealed { opacity: 1; }

/* ---------------------------------------------------------------
   RESPONSIVE
--------------------------------------------------------------- */
@media (max-width: 1100px) {
    .site-header { padding: 22px 28px; }
    .depth-header { padding: 0 28px; }
    .legend { left: 28px; bottom: 60px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .site-footer { padding: 48px 28px 32px; }
}

@media (max-width: 768px) {
    .site-header {
        padding: 16px 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    .depth-nav { gap: 14px; flex-wrap: wrap; }
    .depth-nav-item .label { display: none; }
    .depth-nav-item { font-size: 10px; }

    .depth { padding: 140px 0 60px; }
    .depth-header { padding: 0 20px; }
    .depth-title { font-size: clamp(28px, 9vw, 44px); letter-spacing: 0.16em; }
    .depth-sub { font-size: 12px; }

    .node-label { font-size: 14px; }
    .node-label.small { font-size: 13px; }
    .node-sublabel { font-size: 14px; }
    .node-meta { font-size: 12px; }
    .op-label { font-size: 14px; }

    .legend { position: static; margin: 20px 20px 0; max-width: none; }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .conclusion-statement { padding: 0 24px; }
    .conclusion-kanji { font-size: 48px; }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}