/* ============================================
   mujun.io -- Contradiction Design System
   ============================================ */

:root {
    /* Palette from DESIGN.md */
    --void-black: #0D0D1A;
    --circuit-green: #00FF88;
    --ink-red: #C4453A;
    --terracotta: #B8705A;
    --collision-purple: #6B3FA0;
    --text-light: #D4D4E0;
    --accent-gold: #D4A853;
    --deep-purple: #1A0D2E;

    /* Typography */
    --font-headline: 'Barlow Condensed', sans-serif;
    --font-tech: 'IBM Plex Mono', monospace;
    --font-ink: 'Shippori Mincho', serif;

    /* Spatial asymmetry */
    --margin-left: 48px;
    --margin-right: 32px;
}

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

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background: var(--void-black);
    color: var(--text-light);
    font-family: var(--font-tech);
    font-weight: 400;
    font-size: clamp(14px, 1vw, 16px);
    line-height: 1.75;
    overflow-x: hidden;
}

.viewport {
    min-height: 100vh;
    position: relative;
    overflow: hidden;
}

/* ============================================
   OPENING VIEWPORT
   ============================================ */

.opening {
    background: var(--void-black);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

/* Circuit traces (upper-left) */
.circuit-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.circuit-line {
    fill: none;
    stroke: var(--circuit-green);
    stroke-width: 1.5;
    stroke-dasharray: 1200;
    stroke-dashoffset: 1200;
    animation: draw-circuit 800ms ease-out forwards;
    opacity: 0.7;
}

.c1 { animation-delay: 0ms; }
.c2 { animation-delay: 100ms; }
.c3 { animation-delay: 200ms; }
.c4 { animation-delay: 300ms; }
.c5 { animation-delay: 400ms; }
.c6 { animation-delay: 500ms; }

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

.circuit-node {
    fill: var(--circuit-green);
    opacity: 0;
    animation: node-appear 300ms ease-out forwards;
}

.circuit-node:nth-child(7) { animation-delay: 400ms; }
.circuit-node:nth-child(8) { animation-delay: 500ms; }
.circuit-node:nth-child(9) { animation-delay: 600ms; }
.circuit-node:nth-child(10) { animation-delay: 700ms; }
.circuit-node:nth-child(11) { animation-delay: 800ms; }
.circuit-node:nth-child(12) { animation-delay: 900ms; }

@keyframes node-appear {
    0% { opacity: 0; r: 0; }
    100% { opacity: 0.8; r: 4; }
}

/* Ink splatters (bottom-right) */
.ink-overlay {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 60%;
    height: 60%;
    z-index: 1;
    pointer-events: none;
}

.ink-blob {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(ellipse at center, var(--ink-red), transparent 70%);
    opacity: 0;
    animation: ink-bloom 600ms ease-out forwards;
}

.ink-1 {
    width: 300px; height: 300px;
    bottom: 10%; right: 5%;
    animation-delay: 0ms;
}
.ink-2 {
    width: 200px; height: 180px;
    bottom: 25%; right: 20%;
    animation-delay: 150ms;
}
.ink-3 {
    width: 250px; height: 220px;
    bottom: 5%; right: 30%;
    animation-delay: 300ms;
}
.ink-4 {
    width: 150px; height: 160px;
    bottom: 35%; right: 8%;
    animation-delay: 450ms;
}
.ink-5 {
    width: 180px; height: 190px;
    bottom: 15%; right: 40%;
    animation-delay: 600ms;
}

@keyframes ink-bloom {
    0% {
        opacity: 0;
        transform: scale(0.2);
    }
    60% {
        opacity: 0.5;
    }
    100% {
        opacity: 0.35;
        transform: scale(1);
    }
}

/* Diagonal split line */
.diagonal-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 141.42%;
    height: 2px;
    background: linear-gradient(90deg, var(--circuit-green), var(--collision-purple), var(--ink-red));
    transform-origin: top left;
    transform: rotate(45deg) scaleX(0);
    animation: draw-diagonal 600ms ease-out 1600ms forwards;
    z-index: 2;
    opacity: 0.6;
}

@keyframes draw-diagonal {
    to {
        transform: rotate(45deg) scaleX(0.71);
    }
}

/* Domain title */
.domain-title {
    position: relative;
    z-index: 10;
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(48px, 8vw, 120px);
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: var(--text-light);
    opacity: 0;
    animation: title-appear 400ms ease-out 1200ms forwards;
}

.domain-title .letter {
    display: inline-block;
    position: relative;
    animation: letter-glitch 2s ease-in-out 1200ms;
}

@keyframes title-appear {
    0% { opacity: 0; transform: translateY(20px); }
    100% { opacity: 1; transform: translateY(0); }
}

@keyframes letter-glitch {
    0%, 5% { opacity: 0; }
    6%, 10% { opacity: 1; }
    11%, 13% { opacity: 0; content: attr(data-kanji); }
    14%, 18% { opacity: 1; }
    19%, 20% { color: var(--circuit-green); transform: translateX(-2px); }
    21%, 22% { color: var(--ink-red); transform: translateX(2px); }
    23%, 100% { color: var(--text-light); transform: translateX(0); }
}

/* Subtitle kanji */
.subtitle {
    position: relative;
    z-index: 10;
    display: flex;
    align-items: center;
    gap: 20px;
    margin-top: 16px;
    opacity: 0;
    animation: subtitle-fade 600ms ease-out 2000ms forwards;
}

@keyframes subtitle-fade {
    to { opacity: 1; }
}

.kanji-spear {
    font-family: var(--font-ink);
    font-size: clamp(24px, 3vw, 40px);
    color: var(--circuit-green);
}

.kanji-shield {
    font-family: var(--font-ink);
    font-size: clamp(24px, 3vw, 40px);
    color: var(--ink-red);
}

.subtitle-divider {
    width: 40px;
    height: 2px;
    background: linear-gradient(90deg, var(--circuit-green), var(--ink-red));
}

/* Floating kanji strokes */
.kanji-atmosphere {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

.kanji-stroke {
    position: absolute;
    width: 60px;
    height: 60px;
    opacity: 0.08;
}

.kanji-stroke path {
    fill: none;
    stroke: var(--text-light);
    stroke-width: 2;
    stroke-linecap: round;
}

.ks-1 { top: 15%; left: 10%; animation: float-stroke 12s ease-in-out infinite; }
.ks-2 { top: 25%; right: 15%; animation: float-stroke 14s ease-in-out 2s infinite; }
.ks-3 { top: 60%; left: 20%; animation: float-stroke 16s ease-in-out 4s infinite; }
.ks-4 { top: 70%; right: 25%; animation: float-stroke 13s ease-in-out 1s infinite; }
.ks-5 { top: 40%; left: 65%; animation: float-stroke 15s ease-in-out 3s infinite; }
.ks-6 { top: 80%; left: 45%; animation: float-stroke 11s ease-in-out 5s infinite; }

@keyframes float-stroke {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-10px) rotate(3deg); }
    50% { transform: translateY(5px) rotate(-2deg); }
    75% { transform: translateY(-5px) rotate(1deg); }
}

/* ============================================
   CONTRADICTION PANELS
   ============================================ */

.contradictions-section {
    padding: 80px 0;
    position: relative;
}

/* Glitch line dividers */
.glitch-divider {
    position: relative;
    height: 20px;
    margin: 40px var(--margin-right) 40px var(--margin-left);
    overflow: hidden;
}

.glitch-line {
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
}

.glitch-green {
    background: var(--circuit-green);
    animation: glitch-shift-green 3s ease-in-out infinite;
    opacity: 0.6;
}

.glitch-red {
    background: var(--ink-red);
    animation: glitch-shift-red 3s ease-in-out infinite;
    opacity: 0.6;
    top: calc(50% + 4px);
}

@keyframes glitch-shift-green {
    0%, 90%, 100% { transform: translateX(0); }
    92% { transform: translateX(-3px); }
    94% { transform: translateX(2px); }
    96% { transform: translateX(-4px); }
    98% { transform: translateX(1px); }
}

@keyframes glitch-shift-red {
    0%, 90%, 100% { transform: translateX(0); }
    91% { transform: translateX(4px); }
    93% { transform: translateX(-2px); }
    95% { transform: translateX(3px); }
    97% { transform: translateX(-1px); }
}

/* Glitch divider active state (triggered by scroll) */
.glitch-divider.active .glitch-green {
    animation: glitch-shift-green-fast 0.8s ease-in-out infinite;
}

.glitch-divider.active .glitch-red {
    animation: glitch-shift-red-fast 0.8s ease-in-out infinite;
}

@keyframes glitch-shift-green-fast {
    0%, 100% { transform: translateX(0); }
    10% { transform: translateX(-4px); }
    20% { transform: translateX(3px); }
    30% { transform: translateX(-2px); }
    40% { transform: translateX(4px); }
    50% { transform: translateX(-3px); }
    60% { transform: translateX(2px); }
    70% { transform: translateX(-4px); }
    80% { transform: translateX(3px); }
    90% { transform: translateX(-1px); }
}

@keyframes glitch-shift-red-fast {
    0%, 100% { transform: translateX(0); }
    10% { transform: translateX(3px); }
    20% { transform: translateX(-4px); }
    30% { transform: translateX(2px); }
    40% { transform: translateX(-3px); }
    50% { transform: translateX(4px); }
    60% { transform: translateX(-2px); }
    70% { transform: translateX(3px); }
    80% { transform: translateX(-4px); }
    90% { transform: translateX(1px); }
}

/* Contradiction panel base */
.contradiction-panel {
    display: grid;
    gap: 0;
    margin: 0 var(--margin-right) 0 var(--margin-left);
    padding: 60px 0;
    position: relative;
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.contradiction-panel.visible {
    opacity: 1;
}

.panel-left-dominant {
    grid-template-columns: 60% 40%;
    transform: translateX(-60px);
}

.panel-left-dominant.visible {
    transform: translateX(0);
}

.panel-right-dominant {
    grid-template-columns: 40% 60%;
    transform: translateX(60px);
}

.panel-right-dominant.visible {
    transform: translateX(0);
}

/* Book markers */
.book-marker {
    position: absolute;
    left: -40px;
    top: 60px;
    width: 32px;
    height: 32px;
}

.book-icon {
    width: 100%;
    height: 100%;
}

.book-left {
    fill: none;
    stroke: var(--circuit-green);
    stroke-width: 1;
    opacity: 0.6;
}

.book-right {
    fill: none;
    stroke: var(--ink-red);
    stroke-width: 1;
    opacity: 0.6;
}

/* Panel arguments */
.panel-argument {
    padding: 32px;
    position: relative;
}

.panel-tech {
    background: rgba(0, 255, 136, 0.03);
    border-left: 2px solid var(--circuit-green);
    transform: perspective(1000px) rotateY(3deg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.panel-tech:hover {
    transform: perspective(1000px) rotateY(8deg);
    box-shadow: -6px 4px 20px rgba(0, 255, 136, 0.15);
}

.panel-ink {
    background: rgba(196, 69, 58, 0.03);
    border-right: 2px solid var(--ink-red);
    transform: perspective(1000px) rotateY(-3deg);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.panel-ink:hover {
    transform: perspective(1000px) rotateY(-8deg);
    box-shadow: 6px 4px 20px rgba(196, 69, 58, 0.15);
}

/* Panel overlap friction */
.panel-left-dominant .panel-ink {
    margin-left: -12px;
}

.panel-right-dominant .panel-tech {
    margin-right: -12px;
}

/* Panel labels */
.panel-label {
    font-family: var(--font-headline);
    font-weight: 400;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--circuit-green);
    margin-bottom: 16px;
}

.panel-label-ink {
    font-family: var(--font-headline);
    font-weight: 400;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--ink-red);
    margin-bottom: 16px;
    text-align: right;
}

/* Panel headings */
.panel-heading {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(24px, 3vw, 40px);
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 20px;
}

/* Panel text styles */
.tech-text {
    font-family: var(--font-tech);
    font-weight: 400;
    font-size: clamp(14px, 1vw, 16px);
    line-height: 1.75;
    color: var(--text-light);
}

.ink-text {
    font-family: var(--font-ink);
    font-weight: 500;
    font-size: clamp(15px, 1.1vw, 17px);
    line-height: 1.85;
    color: var(--terracotta);
}

/* Panel metadata */
.panel-meta {
    margin-top: 24px;
    padding-top: 12px;
    border-top: 1px solid rgba(0, 255, 136, 0.15);
}

.meta-label {
    font-family: var(--font-headline);
    font-weight: 400;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-gold);
    margin-right: 12px;
}

.meta-value {
    font-family: var(--font-tech);
    font-size: 13px;
    color: var(--circuit-green);
    opacity: 0.7;
}

/* Section divider (circuit-to-brushstroke) */
.section-divider {
    margin: 20px 0;
    height: 60px;
    position: relative;
}

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

.divider-circuit {
    fill: none;
    stroke: var(--circuit-green);
    stroke-width: 1.5;
    opacity: 0.4;
}

.divider-brush {
    fill: none;
    stroke: var(--ink-red);
    stroke-width: 2;
    stroke-linecap: round;
    opacity: 0.4;
}

/* ============================================
   COLLISION ZONE
   ============================================ */

.collision-zone {
    background: var(--void-black);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.collision-content {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 0;
    width: 100%;
    max-width: 1200px;
    padding: 0 var(--margin-right) 0 var(--margin-left);
    position: relative;
    z-index: 2;
}

.collision-left {
    padding: 40px;
    text-align: right;
}

.collision-right {
    padding: 40px;
    text-align: left;
}

.collision-heading {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(32px, 5vw, 72px);
    letter-spacing: -0.02em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.tech-heading {
    color: var(--circuit-green);
}

.ink-heading {
    color: var(--ink-red);
}

.collision-text {
    max-width: 400px;
}

.collision-left .collision-text {
    margin-left: auto;
}

/* Collision divider (pulsing line) */
.collision-divider {
    width: 4px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pulse-line {
    width: 2px;
    height: 80%;
    background: linear-gradient(180deg, var(--circuit-green), var(--collision-purple), var(--ink-red));
    animation: pulse-warp 3s ease-in-out infinite;
    position: relative;
}

@keyframes pulse-warp {
    0%, 100% {
        transform: scaleX(1);
        box-shadow: 0 0 10px var(--collision-purple);
    }
    50% {
        transform: scaleX(3);
        box-shadow: 0 0 30px var(--collision-purple);
    }
}

/* Collision gradient mesh */
.collision-mesh {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    opacity: 0.3;
}

.mesh-svg {
    width: 100%;
    height: 100%;
}

.mesh-line {
    fill: none;
    stroke: url(#mesh-gradient);
    stroke-width: 1;
    opacity: 0.5;
}

.m1 { animation: mesh-wave 8s ease-in-out infinite; }
.m2 { animation: mesh-wave 10s ease-in-out 1s infinite; }
.m3 { animation: mesh-wave 9s ease-in-out 2s infinite; }
.m4 { animation: mesh-wave 11s ease-in-out 3s infinite; }
.m5 { animation: mesh-wave 7s ease-in-out 4s infinite; }

@keyframes mesh-wave {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(20px); }
}

/* Collision zone color merge on scroll */
.collision-zone.merged {
    background: linear-gradient(135deg,
        rgba(0, 255, 136, 0.05) 0%,
        rgba(107, 63, 160, 0.1) 50%,
        rgba(196, 69, 58, 0.05) 100%
    );
}

.collision-zone.merged .collision-mesh {
    opacity: 0.6;
    transition: opacity 1s ease;
}

/* ============================================
   RESOLUTION VIEWPORT
   ============================================ */

.resolution {
    background: linear-gradient(180deg, var(--void-black) 0%, var(--deep-purple) 40%, var(--deep-purple) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.resolution-content {
    max-width: 800px;
    padding: 60px var(--margin-right) 60px var(--margin-left);
}

/* Kanji equation */
.resolution-kanji {
    font-family: var(--font-ink);
    font-size: clamp(32px, 5vw, 64px);
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.res-spear {
    color: var(--circuit-green);
}

.res-plus, .res-equals {
    font-family: var(--font-tech);
    color: var(--accent-gold);
    font-size: 0.6em;
    opacity: 0.6;
}

.res-shield {
    color: var(--ink-red);
}

.res-result {
    color: var(--collision-purple);
    text-shadow: 0 0 20px rgba(107, 63, 160, 0.5);
}

/* Resolution heading */
.resolution-heading {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(28px, 4vw, 56px);
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: var(--text-light);
    margin-bottom: 28px;
}

/* Resolution text */
.resolution-text {
    font-family: var(--font-ink);
    font-weight: 500;
    font-size: clamp(15px, 1.1vw, 17px);
    line-height: 1.85;
    color: var(--text-light);
    opacity: 0.85;
    margin-bottom: 48px;
}

/* Sigil */
.sigil-svg {
    width: 120px;
    height: 120px;
    margin-bottom: 40px;
}

.sigil-outer {
    fill: none;
    stroke: var(--accent-gold);
    stroke-width: 1;
    opacity: 0.4;
    animation: sigil-rotate 20s linear infinite;
    transform-origin: center;
}

.sigil-line-1 {
    stroke: var(--circuit-green);
    stroke-width: 1;
    opacity: 0.3;
}

.sigil-line-2 {
    stroke: var(--ink-red);
    stroke-width: 1;
    opacity: 0.3;
}

.sigil-inner {
    fill: none;
    stroke: var(--collision-purple);
    stroke-width: 1.5;
    opacity: 0.5;
    animation: sigil-pulse 4s ease-in-out infinite;
}

@keyframes sigil-rotate {
    to { transform: rotate(360deg); }
}

@keyframes sigil-pulse {
    0%, 100% { r: 20; opacity: 0.5; }
    50% { r: 24; opacity: 0.8; }
}

/* Resolution footer */
.resolution-footer {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-domain {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-light);
    opacity: 0.6;
}

.footer-meaning {
    font-family: var(--font-ink);
    font-size: 14px;
    color: var(--terracotta);
    opacity: 0.5;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    :root {
        --margin-left: 24px;
        --margin-right: 16px;
    }

    .contradiction-panel {
        grid-template-columns: 1fr !important;
    }

    .panel-left-dominant,
    .panel-right-dominant {
        transform: translateY(40px);
    }

    .panel-left-dominant.visible,
    .panel-right-dominant.visible {
        transform: translateY(0);
    }

    .panel-ink {
        margin-left: 0 !important;
        margin-right: 0 !important;
        border-left: 2px solid var(--ink-red);
        border-right: none;
    }

    .panel-label-ink {
        text-align: left;
    }

    .collision-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .collision-left {
        text-align: center;
    }

    .collision-right {
        text-align: center;
    }

    .collision-left .collision-text {
        margin: 0 auto;
    }

    .collision-divider {
        width: 100%;
        height: 4px;
    }

    .pulse-line {
        width: 80%;
        height: 2px;
        background: linear-gradient(90deg, var(--circuit-green), var(--collision-purple), var(--ink-red));
    }

    .book-marker {
        display: none;
    }

    .resolution-kanji {
        gap: 8px;
    }

    .ink-overlay {
        width: 80%;
        height: 40%;
    }

    .ink-blob {
        transform: scale(0.6);
    }
}

/* ============================================
   SCROLL REVEAL UTILITY
   ============================================ */

.reveal-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-right {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal-left.visible,
.reveal-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   MIX-BLEND-MODE COLLISION EFFECTS
   ============================================ */

.collision-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at right center, rgba(0, 255, 136, 0.08), transparent 70%);
    mix-blend-mode: screen;
    pointer-events: none;
}

.collision-zone::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: radial-gradient(ellipse at left center, rgba(196, 69, 58, 0.08), transparent 70%);
    mix-blend-mode: screen;
    pointer-events: none;
}