/* ==============================================
   sim-ai.xyz — Quantum Observation Chamber
   Palette: Superposition Spectrum
   ============================================== */

:root {
    --void-bg: #0b0b1a;
    --primary-wave: #7b5ea7;
    --secondary-wave: #3d8b8f;
    --collapse-point: #e8dff5;
    --uncertainty-glow: #c4a1e0;
    --entanglement-accent: #ff6b8a;
    --ghost-text: #4a4a6a;
    --deep-teal: #1a3a4a;

    --font-headline: 'Syne', sans-serif;
    --font-body: 'Instrument Sans', sans-serif;
    --font-mono: 'Victor Mono', monospace;

    --focus-x: 50%;
    --focus-y: 50%;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--void-bg);
    color: var(--collapse-point);
    font-family: var(--font-body);
    font-weight: 400;
    line-height: 1.72;
    font-size: clamp(0.95rem, 1.5vw, 1.15rem);
    letter-spacing: 0.005em;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ---- Canvas Layers ---- */

#wave-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 0;
    pointer-events: none;
}

#particle-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 2;
    pointer-events: none;
}

/* ---- Focal Collapse Overlay ---- */

#focal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 1;
    pointer-events: none;
    background: radial-gradient(
        circle 220px at var(--focus-x) var(--focus-y),
        transparent 0%,
        rgba(11, 11, 26, 0.55) 100%
    );
    transition: background 0.15s ease;
}

/* ---- Orbital Navigation ---- */

#orbital-nav {
    position: fixed;
    top: 2vh;
    left: 2vw;
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 28px;
    align-items: center;
    width: 60px;
}

.orbital-node {
    position: relative;
    width: 28px;
    height: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.orbital-core {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--uncertainty-glow);
    box-shadow: 0 0 8px var(--uncertainty-glow), 0 0 20px rgba(196, 161, 224, 0.3);
    z-index: 2;
    animation: core-pulse 2s ease-in-out infinite;
}

.orbital-node:nth-child(2) .orbital-core { animation-duration: 1.6s; }
.orbital-node:nth-child(3) .orbital-core { animation-duration: 2.4s; }
.orbital-node:nth-child(4) .orbital-core { animation-duration: 0.8s; }
.orbital-node:nth-child(5) .orbital-core { animation-duration: 1.8s; }

@keyframes core-pulse {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.4); }
}

.orbital-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid var(--primary-wave);
    opacity: 0.35;
}

.ring-1 {
    width: 20px;
    height: 20px;
    top: 4px;
    left: 4px;
    animation: ring-rotate 6s linear infinite;
    border-style: dashed;
}

.ring-2 {
    width: 28px;
    height: 28px;
    top: 0;
    left: 0;
    animation: ring-rotate 10s linear infinite reverse;
    border-style: dotted;
    border-color: var(--secondary-wave);
}

.ring-3 {
    width: 36px;
    height: 36px;
    top: -4px;
    left: -4px;
    animation: ring-rotate 14s linear infinite;
    border-style: dashed;
    border-color: var(--uncertainty-glow);
    opacity: 0.2;
}

@keyframes ring-rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.orbital-label {
    position: absolute;
    left: 48px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 300;
    color: var(--ghost-text);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.4s ease, color 0.4s ease;
    pointer-events: none;
}

.orbital-node:hover .orbital-label {
    opacity: 1;
    color: var(--uncertainty-glow);
}

.orbital-paths {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.bezier-path {
    fill: none;
    stroke: var(--ghost-text);
    stroke-width: 0.5;
    opacity: 0.25;
    stroke-dasharray: 4 4;
    animation: dash-flow 8s linear infinite;
}

@keyframes dash-flow {
    from { stroke-dashoffset: 0; }
    to { stroke-dashoffset: -40; }
}

/* ---- Content Layer ---- */

#content {
    position: relative;
    z-index: 3;
}

/* ---- Interference Dividers ---- */

.interference-divider {
    width: 100%;
    height: 40px;
    background: repeating-linear-gradient(
        90deg,
        transparent 0px,
        transparent 8px,
        rgba(123, 94, 167, 0.08) 8px,
        rgba(123, 94, 167, 0.08) 12px,
        transparent 12px,
        transparent 24px,
        rgba(61, 139, 143, 0.06) 24px,
        rgba(61, 139, 143, 0.06) 26px
    );
    animation: interference-shift 12s linear infinite;
}

@keyframes interference-shift {
    from { background-position: 0 0; }
    to { background-position: 200px 0; }
}

/* ---- Section 1: Hero ---- */

.section-hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 2rem;
    position: relative;
}

.superposition-title {
    position: relative;
    display: inline-block;
    margin-bottom: 2rem;
}

.superposition-title .ghost-text,
.superposition-title .primary-text {
    font-family: var(--font-headline);
    font-weight: 800;
    font-size: clamp(2.2rem, 5vw, 4.5rem);
    letter-spacing: -0.03em;
    display: block;
}

.superposition-title .ghost-text {
    position: absolute;
    top: 0;
    left: 0;
    color: var(--ghost-text);
    pointer-events: none;
}

.superposition-title .ghost-1 {
    opacity: 0.08;
    transform: translate(8px, -6px);
    transition: transform 1.5s ease-out, opacity 1.5s ease-out;
}

.superposition-title .ghost-2 {
    opacity: 0.15;
    transform: translate(-5px, 4px);
    transition: transform 1.5s ease-out, opacity 1.5s ease-out;
}

.superposition-title .ghost-3 {
    opacity: 0.25;
    transform: translate(3px, -2px);
    transition: transform 1.5s ease-out, opacity 1.5s ease-out;
}

.superposition-title .primary-text {
    position: relative;
    color: var(--collapse-point);
    z-index: 1;
}

.superposition-title.collapsed .ghost-1,
.superposition-title.collapsed .ghost-2,
.superposition-title.collapsed .ghost-3 {
    transform: translate(0, 0);
    opacity: 0;
}

.hero-subtitle {
    font-size: clamp(0.9rem, 1.4vw, 1.1rem);
    color: var(--uncertainty-glow);
    margin-bottom: 3rem;
    opacity: 0;
    animation: fade-in 2s ease 1s forwards;
}

.hero-wave-indicator {
    opacity: 0;
    animation: fade-in 2s ease 2s forwards;
}

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

.mono-accent {
    font-family: var(--font-mono);
    font-weight: 400;
    font-size: clamp(0.75rem, 1.1vw, 0.9rem);
    color: var(--secondary-wave);
}

.state-label {
    color: var(--entanglement-accent);
}

/* ---- Section 2: Probability Field ---- */

.section-probability {
    padding: 6rem 4rem;
    position: relative;
}

.probability-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr 0.8fr;
    grid-template-rows: auto auto;
    gap: 2.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.prob-card {
    position: relative;
    transform: rotate(var(--rotation));
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.prob-card:hover {
    transform: rotate(0deg) scale(1.02);
}

.card-1 { grid-column: 1 / 2; grid-row: 1; }
.card-2 { grid-column: 2 / 4; grid-row: 1; }
.card-3 { grid-column: 1 / 3; grid-row: 2; }
.card-4 { grid-column: 3 / 4; grid-row: 2; }

.card-blur-halo {
    position: absolute;
    inset: -25px;
    border-radius: 16px;
    background: radial-gradient(
        ellipse at center,
        rgba(123, 94, 167, 0.08) 0%,
        transparent 70%
    );
    filter: blur(20px);
    z-index: -1;
    animation: halo-breathe 5s ease-in-out infinite;
}

.card-1 .card-blur-halo { animation-delay: 0s; }
.card-2 .card-blur-halo { animation-delay: -1.2s; }
.card-3 .card-blur-halo { animation-delay: -2.5s; }
.card-4 .card-blur-halo { animation-delay: -3.8s; }

@keyframes halo-breathe {
    0%, 100% { filter: blur(20px); opacity: 0.5; }
    50% { filter: blur(35px); opacity: 0.8; }
}

.card-content {
    background: rgba(11, 11, 26, 0.55);
    backdrop-filter: blur(12px) saturate(120%);
    -webkit-backdrop-filter: blur(12px) saturate(120%);
    border: 1px solid rgba(123, 94, 167, 0.2);
    border-radius: 12px;
    padding: 2rem 2.2rem;
    position: relative;
}

.card-content h2 {
    margin-bottom: 1rem;
}

.card-content p {
    margin-bottom: 1.2rem;
    color: rgba(232, 223, 245, 0.75);
}

.probability-value {
    color: var(--entanglement-accent);
    font-style: italic;
}

.superposition-heading {
    position: relative;
    display: inline-block;
}

.superposition-heading .ghost-text,
.superposition-heading .primary-text {
    font-family: var(--font-headline);
    font-weight: 700;
    font-size: clamp(1.4rem, 2.8vw, 2.2rem);
    letter-spacing: -0.03em;
    display: block;
}

.superposition-heading .ghost-text {
    position: absolute;
    top: 0;
    left: 0;
    color: var(--ghost-text);
    pointer-events: none;
    transition: transform 1.5s ease-out, opacity 1.5s ease-out;
}

.superposition-heading .ghost-1 {
    opacity: 0.12;
    transform: translate(5px, -3px);
}

.superposition-heading .ghost-2 {
    opacity: 0.2;
    transform: translate(-3px, 2px);
}

.superposition-heading .ghost-3 {
    opacity: 0.25;
    transform: translate(2px, -4px);
}

.superposition-heading .primary-text {
    position: relative;
    color: var(--collapse-point);
}

.superposition-heading.collapsed .ghost-1,
.superposition-heading.collapsed .ghost-2,
.superposition-heading.collapsed .ghost-3 {
    transform: translate(0, 0);
    opacity: 0;
}

@supports (font-variation-settings: normal) {
    .superposition-heading .primary-text {
        font-variation-settings: 'wght' 700;
        transition: font-variation-settings 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    .superposition-heading:hover .primary-text {
        font-variation-settings: 'wght' 800;
    }
}

.particle-stream-lines {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 200px;
    pointer-events: none;
    opacity: 0.15;
}

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

.stream-path {
    fill: none;
    stroke-width: 1.5;
    stroke-dasharray: 8 12;
    animation: stream-flow 6s linear infinite;
}

.stream-1 { stroke: var(--primary-wave); animation-duration: 5s; }
.stream-2 { stroke: var(--secondary-wave); animation-duration: 7s; }
.stream-3 { stroke: var(--uncertainty-glow); animation-duration: 6s; animation-delay: -2s; }

@keyframes stream-flow {
    from { stroke-dashoffset: 0; }
    to { stroke-dashoffset: -100; }
}

/* ---- Section 3: Wave Function Narrative ---- */

.section-wave-narrative {
    padding: 4rem 2rem;
    position: relative;
}

.section-wave-narrative .section-title {
    text-align: center;
    margin-bottom: 2rem;
}

.wave-scrub-container {
    width: 100%;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    position: relative;
    height: 420px;
}

.wave-scrub-track {
    width: 300vw;
    height: 100%;
    position: relative;
}

#wave-scrub-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.wave-annotation {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 260px;
    padding: 1.5rem;
    background: rgba(11, 11, 26, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(61, 139, 143, 0.25);
    border-radius: 8px;
    opacity: 0;
    transition: opacity 0.6s ease;
    scroll-snap-align: center;
}

.wave-annotation.visible {
    opacity: 1;
}

.wave-annotation .mono-accent {
    display: block;
    margin-bottom: 0.6rem;
    color: var(--entanglement-accent);
    font-style: italic;
}

.wave-annotation p {
    color: rgba(232, 223, 245, 0.7);
    font-size: 0.9rem;
    line-height: 1.6;
}

.annotation-1 { left: 12%; }
.annotation-2 { left: 30%; }
.annotation-3 { left: 48%; }
.annotation-4 { left: 66%; }
.annotation-5 { left: 84%; }

/* ---- Section 4: Collapse Zone ---- */

.section-collapse {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 6rem 2rem;
    position: relative;
}

.collapse-container {
    text-align: center;
    max-width: 800px;
    opacity: 0;
    transition: opacity 1.5s ease;
}

.collapse-container.observed {
    opacity: 1;
}

.collapse-statement .primary-text {
    font-size: clamp(1.8rem, 4vw, 3.5rem);
}

.collapse-statement .ghost-text {
    font-size: clamp(1.8rem, 4vw, 3.5rem);
}

.collapse-sub {
    margin-top: 2rem;
    color: var(--uncertainty-glow);
    font-size: clamp(0.8rem, 1.2vw, 1rem);
}

/* ---- Section 5: Entanglement Footer ---- */

.section-entanglement {
    padding: 6rem 4rem 3rem;
    position: relative;
}

.entanglement-pair {
    display: flex;
    align-items: stretch;
    justify-content: center;
    gap: 0;
    max-width: 1100px;
    margin: 0 auto 4rem;
}

.entangled-block {
    flex: 1;
    max-width: 420px;
    position: relative;
}

.entangled-block .card-content {
    height: 100%;
}

.block-a {
    transform: rotate(-1.2deg);
}

.block-b {
    transform: rotate(1.2deg);
}

.entanglement-connector {
    width: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.connector-svg {
    width: 100%;
    height: 200px;
}

.entangle-line {
    fill: none;
    stroke: var(--entanglement-accent);
    stroke-width: 1;
    opacity: 0.4;
    stroke-dasharray: 6 6;
    animation: dash-flow 4s linear infinite;
}

.entangle-dot {
    fill: var(--entanglement-accent);
    opacity: 0.6;
    animation: dot-pulse 2s ease-in-out infinite;
}

.dot-2 { animation-delay: -0.6s; }
.dot-3 { animation-delay: -1.2s; }

@keyframes dot-pulse {
    0%, 100% { r: 3; opacity: 0.4; }
    50% { r: 5; opacity: 0.9; }
}

.entangled-label {
    font-size: clamp(0.85rem, 1.2vw, 1rem);
    color: var(--collapse-point);
    margin-bottom: 1rem;
    display: block;
}

.entanglement-accent {
    color: var(--entanglement-accent);
}

.entangle-meter {
    width: 100%;
    height: 4px;
    background: rgba(123, 94, 167, 0.2);
    border-radius: 2px;
    margin: 1rem 0;
    overflow: hidden;
}

.meter-fill {
    height: 100%;
    width: 50%;
    border-radius: 2px;
    transition: width 0.3s ease;
}

.meter-a {
    background: linear-gradient(90deg, var(--primary-wave), var(--secondary-wave));
}

.meter-b {
    background: linear-gradient(90deg, var(--secondary-wave), var(--primary-wave));
    margin-left: auto;
}

.spin-value {
    color: var(--entanglement-accent);
    font-weight: 500;
}

.footer-domain {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid rgba(123, 94, 167, 0.12);
    color: var(--ghost-text);
    font-size: 0.8rem;
    letter-spacing: 0.02em;
}

/* ---- Responsive ---- */

@media (max-width: 768px) {
    .probability-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
        gap: 2rem;
        padding: 0 1rem;
    }

    .card-1, .card-2, .card-3, .card-4 {
        grid-column: auto;
        grid-row: auto;
    }

    .section-probability {
        padding: 4rem 1rem;
    }

    .entanglement-pair {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .entanglement-connector {
        width: 100%;
        height: 60px;
        transform: rotate(90deg);
    }

    .block-a, .block-b {
        transform: rotate(0deg);
        max-width: 100%;
    }

    #orbital-nav {
        top: auto;
        bottom: 1rem;
        left: 50%;
        transform: translateX(-50%);
        flex-direction: row;
        width: auto;
        gap: 18px;
    }

    .orbital-label {
        left: 50%;
        top: -24px;
        transform: translateX(-50%);
    }

    .orbital-paths {
        display: none;
    }

    .section-entanglement {
        padding: 4rem 1.5rem 2rem;
    }
}

/* ---- Reduced Motion ---- */

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