/* ==========================================================================
   mujun.works - Where Contradiction Compiles
   Fairycore + Tech-Tutorial | Split-Screen | Retro-Futuristic Palette
   ========================================================================== */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --twilight-void: #1a1035;
    --obsidian-whisper: #0f0d15;
    --spore-lavender: #c8b6ff;
    --foxfire-rose: #e8c4b8;
    --biolume-teal: #72f2c9;
    --moon-dust: #d4d0e0;
    --fog-silk: #9e97b0;
    --star-core: #fff4b8;
    --ember-moth: #ff8fa3;
    --code-bg: #1a1630;
    --code-border: rgba(200, 182, 255, 0.133);
    --divider-top: #c8b6ff;
    --divider-mid: rgba(255, 255, 255, 0.2);
    --divider-bot: #e8c4b8;
    --nebula-drift: linear-gradient(135deg, #c8b6ff, #72f2c9, #e8c4b8);
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    color: var(--moon-dust);
    background: var(--obsidian-whisper);
    line-height: 1.75;
    overflow-x: hidden;
}

/* --- Noise Texture Overlay (Tutorial panels) --- */
.tutorial-panel {
    position: relative;
}

.tutorial-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.02;
    pointer-events: none;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-size: 256px 256px;
    z-index: 0;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */

#hero {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, var(--twilight-void) 0%, #2d1b4e 100%);
    overflow: hidden;
}

#hero-stars {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

#hero-spores {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

#hero-sigil {
    position: relative;
    width: clamp(160px, 30vw, 280px);
    height: clamp(160px, 30vw, 280px);
    z-index: 2;
    opacity: 0;
    transform: scale(0.8);
    animation: sigil-rotate 120s linear infinite;
}

#hero-sigil.visible {
    animation: sigil-fade-in 1.5s cubic-bezier(0.16, 1, 0.3, 1) forwards, sigil-rotate 120s linear infinite;
}

@keyframes sigil-fade-in {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 0.4;
        transform: scale(1);
    }
}

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

#hero-text {
    position: relative;
    z-index: 3;
    text-align: center;
    margin-top: 2rem;
}

#hero-title {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: clamp(3rem, 8vw, 6rem);
    color: var(--moon-dust);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    overflow: hidden;
}

#hero-title .letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(20px);
}

#hero-title .letter.visible {
    animation: letter-in 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes letter-in {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#hero-subtitle {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    color: var(--foxfire-rose);
    letter-spacing: 0.06em;
    opacity: 0;
    margin-top: 0.5rem;
}

#hero-subtitle.visible {
    animation: subtitle-in 0.8s ease forwards;
}

@keyframes subtitle-in {
    from { opacity: 0; }
    to { opacity: 1; }
}

#scroll-indicator {
    position: absolute;
    bottom: 2rem;
    z-index: 4;
    opacity: 0;
    animation: bounce 2s ease-in-out infinite;
    animation-delay: 4s;
}

#scroll-indicator.visible {
    animation: bounce 2s ease-in-out infinite, fade-in 0.5s ease forwards;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(8px); }
}

@keyframes fade-in {
    from { opacity: 0; }
    to { opacity: 0.6; }
}

/* ==========================================================================
   SPLIT-SCREEN CHAPTERS
   ========================================================================== */

.chapter {
    position: relative;
    width: 100%;
}

.split-screen {
    display: grid;
    grid-template-columns: 2fr 3fr;
    min-height: 100vh;
    position: relative;
}

/* Vertical divider between panels */
.split-screen::after {
    content: '';
    position: absolute;
    top: 0;
    left: 40%;
    width: 2px;
    height: 100%;
    background: linear-gradient(
        180deg,
        var(--divider-top) 0%,
        var(--divider-mid) 50%,
        var(--divider-bot) 100%
    );
    z-index: 5;
    pointer-events: none;
}

/* --- Grimoire Panel (Left) --- */

.grimoire-panel {
    position: relative;
    background: linear-gradient(180deg, var(--twilight-void) 0%, #2d1b4e 100%);
    padding: clamp(2rem, 4vw, 4rem);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    min-height: 100vh;
}

.grimoire-panel .sigil {
    width: 120px;
    height: 120px;
    opacity: 0.4;
    margin-bottom: 2rem;
    animation: sigil-rotate 120s linear infinite;
}

.grimoire-panel .constellation-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.grimoire-panel .spore-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.grimoire-heading {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: clamp(1.4rem, 3.5vw, 2.4rem);
    color: var(--moon-dust);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    text-align: center;
    position: relative;
    z-index: 2;
}

.grimoire-annotation {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    color: var(--foxfire-rose);
    letter-spacing: 0.06em;
    text-align: center;
    margin-top: 1rem;
    position: relative;
    z-index: 2;
}

/* --- Tutorial Panel (Right) --- */

.tutorial-panel {
    background: var(--obsidian-whisper);
    padding: clamp(2rem, 4vw, 4rem);
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 100vh;
}

.tutorial-heading {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 600;
    font-size: clamp(1.4rem, 3.5vw, 2.4rem);
    color: var(--moon-dust);
    letter-spacing: 0.04em;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 1;
}

.tutorial-panel p {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: clamp(0.95rem, 1.8vw, 1.1rem);
    line-height: 1.75;
    color: var(--moon-dust);
    margin-bottom: 1.5em;
    position: relative;
    z-index: 1;
}

/* --- Code Blocks --- */

.code-block {
    position: relative;
    background: var(--code-bg);
    border: 1px solid var(--code-border);
    border-top: 2px solid transparent;
    border-image: linear-gradient(135deg, #c8b6ff, #72f2c9, #e8c4b8) 1;
    border-image-slice: 1 0 0 0;
    border-radius: 0;
    padding: 1.5rem;
    margin-bottom: 1.5em;
    box-shadow: 0 0 12px rgba(200, 182, 255, 0.06);
    transition: box-shadow 0.3s ease;
    z-index: 1;
    overflow-x: auto;
}

.code-block:hover {
    box-shadow: 0 0 20px rgba(200, 182, 255, 0.12);
}

.code-label {
    position: absolute;
    top: 0.5rem;
    right: 0.75rem;
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.7rem;
    color: var(--fog-silk);
    text-transform: lowercase;
}

.code-block pre {
    margin: 0;
}

.code-block code {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 0.9em;
    line-height: 1.6;
    color: var(--moon-dust);
}

/* Syntax highlighting */
.code-block .kw { color: var(--spore-lavender); }
.code-block .fn { color: var(--biolume-teal); }
.code-block .str { color: var(--foxfire-rose); }
.code-block .num { color: var(--star-core); }
.code-block .cm { color: var(--fog-silk); }

/* --- Section Divider --- */

.section-divider {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1rem 0;
    background: var(--obsidian-whisper);
}

.star-divider {
    width: 100px;
    height: 20px;
}

/* --- Horizontal rule between tutorial sections --- */

.tutorial-panel hr {
    border: none;
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent 0%,
        var(--divider-top) 20%,
        var(--divider-mid) 50%,
        var(--divider-bot) 80%,
        transparent 100%
    );
    margin: 2rem 0;
}

/* ==========================================================================
   CONVERGENCE (Final Section)
   ========================================================================== */

.chapter-convergence {
    position: relative;
}

.convergence-zone {
    position: relative;
    width: 100%;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(180deg, var(--twilight-void) 0%, var(--obsidian-whisper) 100%);
    overflow: hidden;
}

#convergence-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.convergence-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
    padding: clamp(2rem, 4vw, 4rem);
    text-align: center;
}

.convergence-heading {
    font-family: 'Barlow Condensed', sans-serif;
    font-weight: 700;
    font-size: clamp(2.8rem, 7vw, 5.6rem);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    background: linear-gradient(135deg, #c8b6ff, #72f2c9, #e8c4b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.convergence-annotation {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.1rem, 2.5vw, 1.6rem);
    color: var(--foxfire-rose);
    letter-spacing: 0.06em;
    margin-bottom: 2rem;
}

.convergence-text {
    font-family: 'Inter', sans-serif;
    font-weight: 400;
    font-size: clamp(0.95rem, 1.8vw, 1.1rem);
    line-height: 1.75;
    color: var(--moon-dust);
    margin-bottom: 1.5em;
}

.convergence-sigil-wrap {
    display: flex;
    justify-content: center;
    margin: 3rem 0;
}

.convergence-sigil {
    width: 160px;
    height: 160px;
    opacity: 0.5;
    animation: sigil-rotate 120s linear infinite;
}

.convergence-final {
    font-family: 'Cormorant Garamond', serif;
    font-weight: 300;
    font-style: italic;
    font-size: clamp(1.3rem, 3vw, 2rem);
    color: var(--star-core);
    letter-spacing: 0.06em;
    margin-top: 2rem;
}

/* ==========================================================================
   ANIMATIONS - Scroll-Driven Reveal
   ========================================================================== */

.grimoire-panel {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.grimoire-panel.revealed {
    opacity: 1;
    transform: translateX(0);
}

.tutorial-panel {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.tutorial-panel.revealed {
    opacity: 1;
    transform: translateX(0);
}

.tutorial-heading {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.tutorial-heading.revealed {
    opacity: 1;
    transform: translateY(0);
}

.tutorial-panel p {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.tutorial-panel p.revealed {
    opacity: 1;
    transform: translateY(0);
}

.code-block {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.convergence-content > * {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.convergence-content > *.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ==========================================================================
   INTERACTIVE ELEMENTS
   ========================================================================== */

a {
    color: var(--biolume-teal);
    text-decoration: none;
    background-image: linear-gradient(var(--biolume-teal), var(--biolume-teal));
    background-size: 0% 1px;
    background-position: left bottom;
    background-repeat: no-repeat;
    transition: background-size 0.3s ease;
}

a:hover {
    background-size: 100% 1px;
}

/* Star cursor trail (grimoire panels only) */
.cursor-star {
    position: fixed;
    width: 3px;
    height: 3px;
    background: var(--star-core);
    border-radius: 50%;
    pointer-events: none;
    z-index: 100;
    opacity: 0.8;
    animation: cursor-star-fade 0.8s ease-out forwards;
}

@keyframes cursor-star-fade {
    from {
        opacity: 0.8;
        transform: scale(1);
    }
    to {
        opacity: 0;
        transform: scale(0.3);
    }
}

/* Star bullets for lists */
.star-bullet::before {
    content: '';
    display: inline-block;
    width: 8px;
    height: 8px;
    margin-right: 0.5em;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 12 12' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 0L7.4 4.1L12 4.6L8.5 7.7L9.5 12L6 9.8L2.5 12L3.5 7.7L0 4.6L4.6 4.1Z' fill='%23c8b6ff'/%3E%3C/svg%3E") no-repeat center;
    background-size: contain;
    vertical-align: middle;
}

/* ==========================================================================
   SPORE PARTICLES (CSS-only fallback / enhancement)
   ========================================================================== */

.spore {
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
    animation: spore-float linear infinite;
}

@keyframes spore-float {
    0% {
        opacity: 0;
        transform: translateY(0) translateX(0);
    }
    10% {
        opacity: var(--spore-opacity, 0.25);
    }
    90% {
        opacity: var(--spore-opacity, 0.25);
    }
    100% {
        opacity: 0;
        transform: translateY(calc(-100vh)) translateX(var(--spore-drift, 30px));
    }
}

/* ==========================================================================
   PULSING STARS
   ========================================================================== */

@keyframes star-pulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

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

@media (max-width: 768px) {
    .split-screen {
        grid-template-columns: 1fr;
    }

    .split-screen::after {
        display: none;
    }

    .grimoire-panel {
        min-height: 40vh;
        height: 40vh;
    }

    .tutorial-panel {
        min-height: auto;
        padding: clamp(1.5rem, 4vw, 3rem);
    }

    .grimoire-heading {
        font-size: clamp(1.2rem, 5vw, 1.8rem);
    }

    .tutorial-heading {
        font-size: clamp(1.2rem, 5vw, 1.8rem);
    }

    .convergence-heading {
        font-size: clamp(2rem, 7vw, 3.5rem);
    }

    #hero-title {
        font-size: clamp(2rem, 10vw, 4rem);
    }
}

/* ==========================================================================
   SCROLLBAR STYLING
   ========================================================================== */

::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--obsidian-whisper);
}

::-webkit-scrollbar-thumb {
    background: rgba(200, 182, 255, 0.2);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(200, 182, 255, 0.4);
}

/* ==========================================================================
   SELECTION STYLING
   ========================================================================== */

::selection {
    background: rgba(200, 182, 255, 0.3);
    color: var(--moon-dust);
}