/* kakuritsu.com — Aurora Through Marble */

:root {
    --deep-night: #1A1B2F;
    --obsidian-marble: #2A2B3D;
    --smoke-marble: #3D3E52;
    --prob-teal: #00E5A0;
    --aurora-violet: #7B2FBE;
    --prob-rose: #FF6B9D;
    --marble-white: #E8E2D6;
    --weathered-stone: #9B968A;
    --fog-gray: #6B6760;
    --vein-gold: #C4A265;
    --fern-shadow: #2D5A3D;
    --midnight-indigo: #0D0E1A;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Outfit', sans-serif;
    font-weight: 300;
    color: var(--marble-white);
    background: var(--deep-night);
    line-height: 1.75;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}

/* ---- Grain overlay ---- */
.grain-overlay {
    position: fixed;
    inset: 0;
    z-index: 9000;
    pointer-events: none;
    opacity: 0.05;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 200px 200px;
}

/* ---- Navigation pill ---- */
.nav-pill {
    position: fixed;
    top: 1.2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 8000;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0.6rem 1.6rem;
    height: 48px;
    background: rgba(42, 43, 61, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 999px;
    border: 1px solid transparent;
    background-clip: padding-box;
    box-shadow: 0 0 0 1px var(--prob-teal);
    opacity: 0;
    transition: opacity 0.5s ease;
}

.nav-pill.visible {
    opacity: 1;
}

.nav-wordmark {
    font-family: 'Bungee Shade', cursive;
    font-size: 0.85rem;
    color: var(--prob-teal);
    letter-spacing: 0.04em;
}

.nav-links {
    display: flex;
    gap: 1rem;
}

.nav-link {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.75rem;
    color: var(--weathered-stone);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--prob-teal);
}

/* ---- Act / Section base ---- */
.act {
    position: relative;
    display: flex;
    width: 100%;
}

.act-threshold {
    min-height: 100vh;
}

.act-split {
    min-height: 200vh;
}

.act-inversion {
    min-height: 100vh;
}

.act-garden {
    min-height: 200vh;
}

.act-resolution {
    min-height: 100vh;
}

/* ---- Panel system ---- */
.panel {
    position: relative;
    overflow: hidden;
}

.panel-anchor {
    width: 45%;
    background: var(--deep-night);
    padding: 6rem 3rem 4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.panel-chaos {
    width: 55%;
    background: var(--midnight-indigo);
    position: relative;
    overflow: hidden;
}

/* ---- Fissure ---- */
.fissure {
    position: relative;
    width: 4px;
    flex-shrink: 0;
    z-index: 10;
}

.fissure-wide {
    width: 8px;
}

.fissure-max {
    width: 12px;
}

.fissure-closing {
    width: 6px;
}

.fissure-glow {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, var(--prob-teal), var(--aurora-violet), var(--prob-rose));
    box-shadow: 0 0 12px var(--prob-teal), 0 0 24px var(--aurora-violet);
    animation: fissurePulse 4s ease-in-out infinite alternate;
}

@keyframes fissurePulse {
    0% { opacity: 0.6; }
    100% { opacity: 1; }
}

/* ---- Hero title ---- */
.hero-title {
    font-family: 'Bungee Shade', cursive;
    font-size: clamp(3rem, 8vw, 7rem);
    color: var(--prob-teal);
    letter-spacing: 0.04em;
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

.title-char {
    display: inline-block;
    transform: translateY(calc(var(--i) * 0.2em));
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
    transition-delay: calc(var(--i) * 0.1s);
}

.title-char.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-tagline {
    font-family: 'Outfit', sans-serif;
    font-weight: 300;
    font-size: clamp(1.1rem, 2vw, 1.5rem);
    color: var(--weathered-stone);
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 0.8s ease 1.2s, transform 0.8s ease 1.2s;
}

.hero-tagline.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ---- Marble surfaces ---- */
.marble-surface {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 40%, var(--smoke-marble) 0%, var(--obsidian-marble) 40%, var(--deep-night) 100%);
}

.marble-veins {
    position: absolute;
    inset: 0;
    opacity: 0.2;
    background-image:
        url("data:image/svg+xml,%3Csvg viewBox='0 0 400 400' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='v'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.015' numOctaves='4' seed='1'/%3E%3CfeColorMatrix type='saturate' values='0'/%3E%3CfeComponentTransfer%3E%3CfeFuncA type='discrete' tableValues='0 0 0 0 0 0 1 1 0 0'/%3E%3C/feComponentTransfer%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23v)' fill='%23C4A265'/%3E%3C/svg%3E");
    background-size: 400px 400px;
    mix-blend-mode: overlay;
}

.marble-veins-complex {
    opacity: 0.3;
}

.marble-veins-aurora {
    opacity: 0.35;
    mix-blend-mode: screen;
}

.marble-final {
    background: radial-gradient(ellipse at 50% 50%, var(--obsidian-marble) 0%, var(--deep-night) 60%, var(--midnight-indigo) 100%);
}

/* ---- Aurora ambient ---- */
.aurora-ambient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(0, 229, 160, 0.08) 0%, rgba(123, 47, 190, 0.06) 45%, rgba(255, 107, 157, 0.05) 100%);
    animation: auroraShift 60s linear infinite;
    mix-blend-mode: screen;
}

@keyframes auroraShift {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

/* ---- Fern fronds ---- */
.fern-frond {
    position: absolute;
    z-index: 2;
    overflow: visible;
}

.fern-hero {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 400px;
}

.fern-garden-l {
    bottom: 0;
    left: 10%;
    width: 100px;
    height: 300px;
}

.fern-garden-r {
    bottom: 0;
    right: 15%;
    width: 90px;
    height: 280px;
}

.fern-main,
.fern-leaf {
    stroke-dasharray: 500;
    stroke-dashoffset: 500;
    opacity: 0.35;
    transition: stroke-dashoffset 2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.fern-frond.in-view .fern-main {
    stroke-dashoffset: 0;
}

.fern-frond.in-view .fern-leaf {
    stroke-dashoffset: 0;
}

.fern-frond.in-view .fl-1 { transition-delay: 0.3s; }
.fern-frond.in-view .fl-2 { transition-delay: 0.5s; }
.fern-frond.in-view .fl-3 { transition-delay: 0.7s; }
.fern-frond.in-view .fl-4 { transition-delay: 0.9s; }
.fern-frond.in-view .fl-5 { transition-delay: 1.1s; }
.fern-frond.in-view .fl-6 { transition-delay: 1.3s; }
.fern-frond.in-view .fl-7 { transition-delay: 1.5s; }
.fern-frond.in-view .fl-8 { transition-delay: 1.7s; }

/* ---- Text blocks ---- */
.text-block {
    max-width: 80%;
    margin-top: 4rem;
    opacity: 0;
    transform: translateY(2rem);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.text-block.revealed {
    opacity: 1;
    transform: translateY(0);
}

.body-text {
    font-size: clamp(1rem, 1.8vw, 1.15rem);
    line-height: 1.75;
    color: var(--marble-white);
}

.body-text em {
    font-style: italic;
    color: var(--prob-teal);
}

/* ---- Section headings ---- */
.section-heading {
    font-family: 'Bungee Shade', cursive;
    font-size: clamp(2rem, 5vw, 4rem);
    color: var(--prob-teal);
    letter-spacing: 0.04em;
    line-height: 1.1;
    margin-bottom: 2rem;
}

/* ---- Pull quotes ---- */
.pull-quote {
    max-width: 85%;
    margin-top: 4rem;
    padding: 2rem 2.5rem;
    border: 2px solid var(--vein-gold);
    background: rgba(42, 43, 61, 0.4);
    opacity: 0;
    transform: translateY(2rem);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.pull-quote.revealed {
    opacity: 1;
    transform: translateY(0);
}

.quote-text {
    font-family: 'Righteous', cursive;
    font-size: clamp(1.4rem, 3vw, 2.4rem);
    letter-spacing: 0.02em;
    line-height: 1.25;
    color: var(--marble-white);
}

.mono-accent {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.9em;
    color: var(--prob-teal);
}

/* ---- Inversion ---- */
.act-inversion .panel-anchor {
    padding: 4rem 3rem;
}

.inversion-text {
    position: relative;
    z-index: 2;
    opacity: 0;
    transform: translateY(2rem);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.inversion-text.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Shake animation */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-3px) rotate(-0.5deg); }
    75% { transform: translateX(3px) rotate(0.5deg); }
}

.shake {
    animation: shake 0.3s ease;
}

/* ---- Mycelium ---- */
.mycelium-net {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
}

.myc-branch {
    fill: none;
    stroke: var(--weathered-stone);
    stroke-width: 0.8;
    opacity: 0.15;
    stroke-dasharray: 600;
    stroke-dashoffset: 600;
    transition: stroke-dashoffset 1.2s ease;
}

.mycelium-net.in-view .myc-branch {
    stroke-dashoffset: 0;
}

.mycelium-net.in-view .mb-1 { transition-delay: 0s; }
.mycelium-net.in-view .mb-2 { transition-delay: 0.2s; }
.mycelium-net.in-view .mb-3 { transition-delay: 0.4s; }
.mycelium-net.in-view .mb-4 { transition-delay: 0.6s; }
.mycelium-net.in-view .mb-5 { transition-delay: 0.8s; }
.mycelium-net.in-view .mb-6 { transition-delay: 1.0s; }
.mycelium-net.in-view .mb-7 { transition-delay: 1.2s; }

/* ---- Dandelion particles ---- */
.dandelion-seed {
    position: absolute;
    width: 6px;
    height: 6px;
    background: var(--marble-white);
    border-radius: 50%;
    opacity: 0;
    pointer-events: none;
}

.dandelion-seed.drifting {
    animation: dandelionDrift var(--drift-dur) var(--drift-delay) ease-out forwards;
}

@keyframes dandelionDrift {
    0% {
        opacity: 0.5;
        transform: translate(0, 0);
    }
    50% {
        opacity: 0.4;
        transform: translate(calc(var(--dx) * 0.6), calc(var(--dy) * 0.5));
    }
    100% {
        opacity: 0;
        transform: translate(var(--dx), var(--dy));
    }
}

/* ---- Rising dandelion seeds (resolution) ---- */
.dandelion-rise-seed {
    position: absolute;
    width: 5px;
    height: 5px;
    background: var(--marble-white);
    border-radius: 50%;
    opacity: 0;
}

.dandelion-rise-seed.rising {
    animation: seedRise var(--rise-dur) var(--rise-delay) ease-out forwards;
}

@keyframes seedRise {
    0% {
        opacity: 0.5;
        transform: translateY(0) translateX(0);
    }
    60% {
        opacity: 0.35;
    }
    100% {
        opacity: 0;
        transform: translateY(-200px) translateX(var(--sway));
    }
}

/* ---- Probability die ---- */
.probability-die {
    width: 80px;
    height: 80px;
    position: relative;
    margin: 0 auto 3rem;
    transform-style: preserve-3d;
    animation: dieTumble 20s linear infinite;
}

.die-face {
    position: absolute;
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(42, 43, 61, 0.7);
    border: 1px solid var(--vein-gold);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.die-glyph {
    font-size: 2rem;
    color: var(--prob-teal);
}

.die-front  { transform: translateZ(40px); }
.die-back   { transform: rotateY(180deg) translateZ(40px); }
.die-right  { transform: rotateY(90deg) translateZ(40px); }
.die-left   { transform: rotateY(-90deg) translateZ(40px); }
.die-top    { transform: rotateX(90deg) translateZ(40px); }
.die-bottom { transform: rotateX(-90deg) translateZ(40px); }

@keyframes dieTumble {
    0%   { transform: rotateX(0deg) rotateY(0deg); }
    100% { transform: rotateX(360deg) rotateY(360deg); }
}

.probability-die.landing {
    animation: dieLand 3s cubic-bezier(0.22, 1, 0.36, 1) forwards;
}

@keyframes dieLand {
    0%   { transform: rotateX(720deg) rotateY(540deg); }
    100% { transform: rotateX(var(--land-x)) rotateY(var(--land-y)); }
}

/* ---- Resolution ---- */
.act-resolution {
    display: block;
}

.unified-field {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.resolution-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 2rem;
}

.final-aphorism {
    font-family: 'Bungee Shade', cursive;
    font-size: clamp(1.5rem, 4vw, 3rem);
    color: var(--prob-teal);
    letter-spacing: 0.04em;
    line-height: 1.2;
    max-width: 700px;
    margin: 0 auto;
    opacity: 0;
    transform: translateY(1rem);
    transition: opacity 1s ease, transform 1s ease;
}

.final-aphorism.visible {
    opacity: 1;
    transform: translateY(0);
}

.dandelion-rise {
    position: relative;
    width: 200px;
    height: 100px;
    margin: 3rem auto 0;
}

.site-footer {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.footer-wordmark {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.85rem;
    color: var(--weathered-stone);
    opacity: 0.7;
}

/* ---- Moss patches ---- */
.marble-surface::after {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 5% 95%, var(--fern-shadow) 0%, transparent 30%),
        radial-gradient(ellipse at 92% 8%, var(--fern-shadow) 0%, transparent 25%);
    opacity: 0.1;
    pointer-events: none;
}

/* ---- Mobile layout ---- */
@media (max-width: 767px) {
    .act {
        flex-direction: column;
    }

    .panel-anchor,
    .panel-chaos {
        width: 100%;
    }

    .panel-anchor {
        padding: 4rem 1.5rem 3rem;
    }

    .panel-chaos {
        min-height: 50vh;
    }

    .act-threshold .panel-chaos {
        min-height: 40vh;
    }

    .fissure {
        width: 100%;
        height: 40px;
        flex-shrink: 0;
    }

    .fissure-glow {
        background: linear-gradient(90deg, var(--prob-teal), var(--aurora-violet), var(--prob-rose));
    }

    .hero-title {
        font-size: clamp(2.5rem, 12vw, 4rem);
    }

    .section-heading {
        font-size: clamp(1.8rem, 8vw, 3rem);
    }

    .text-block,
    .pull-quote {
        max-width: 100%;
    }

    .nav-links {
        display: none;
    }

    .nav-pill {
        padding: 0.5rem 1.2rem;
    }

    .fern-hero {
        width: 80px;
        height: 260px;
    }
}

/* ---- Tablet layout ---- */
@media (min-width: 768px) and (max-width: 1023px) {
    .act {
        flex-direction: column;
    }

    .panel-anchor,
    .panel-chaos {
        width: 100%;
    }

    .panel-anchor {
        padding: 5rem 2.5rem 3rem;
    }

    .panel-chaos {
        min-height: 50vh;
    }

    .fissure {
        width: 100%;
        height: 6px;
    }

    .fissure-glow {
        background: linear-gradient(90deg, var(--prob-teal), var(--aurora-violet), var(--prob-rose));
    }

    .hero-title {
        font-size: clamp(3rem, 10vw, 6rem);
    }
}

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

    .title-char {
        opacity: 1;
        transform: translateY(0);
    }

    .hero-tagline {
        opacity: 1;
        transform: translateY(0);
    }

    .text-block,
    .pull-quote,
    .inversion-text {
        opacity: 1;
        transform: translateY(0);
    }

    .fern-main,
    .fern-leaf {
        stroke-dashoffset: 0;
    }

    .myc-branch {
        stroke-dashoffset: 0;
    }

    .final-aphorism {
        opacity: 1;
        transform: translateY(0);
    }
}