:root {
    --bg-color: #e5e5e5;
    --text-color: #111111;
    --accent: #ff3300;
    --mono-font: 'JetBrains Mono', monospace;
    --sans-font: 'Inter', sans-serif;
    --grid-color: rgba(0,0,0,0.1);
}

body.invert {
    --bg-color: #111111;
    --text-color: #e5e5e5;
    --grid-color: rgba(255,255,255,0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--sans-font);
    line-height: 1.5;
    overflow-x: hidden;
    transition: background-color 0.8s ease, color 0.8s ease;
}

/* NOISE OVERLAY */
.noise {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 100;
    opacity: 0.25;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* UI OVERLAY */
.ui-overlay {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    z-index: 50;
    padding: 2rem;
    font-family: var(--mono-font);
    font-size: 0.75rem;
    text-transform: uppercase;
    display: flex;
    justify-content: space-between;
    flex-direction: column;
}

.ui-overlay > div {
    position: absolute;
    background: var(--bg-color);
    padding: 0.5rem;
    border: 1px solid var(--text-color);
    transition: all 0.8s ease;
}
.ui-top-left { top: 2rem; left: 2rem; }
.ui-top-right { top: 2rem; right: 2rem; text-align: right; }
.ui-bottom-left { bottom: 2rem; left: 2rem; }
.ui-bottom-right { bottom: 2rem; right: 2rem; text-align: right; }

/* DROPDOWN MENU */
.ui-top-right.dropdown {
    cursor: pointer;
    pointer-events: auto; /* Ensure hover works even if overlay pointer-events are none, though overlay doesn't have none */
}
.dropdown-trigger {
    padding: 0.5rem;
    margin: -0.5rem;
    border: 1px solid transparent;
    transition: all 0.3s ease;
}
.ui-top-right.dropdown:hover .dropdown-trigger,
.ui-top-right.dropdown.is-open .dropdown-trigger {
    border-color: var(--text-color);
}
.dropdown-content {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-color);
    border: 1px solid var(--text-color);
    margin-top: 0.5rem;
    padding: 0.5rem 0;
    min-width: 260px;
    text-align: left;
    max-height: 70vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}
.ui-top-right.dropdown.is-open .dropdown-content {
    display: block;
}

.dropdown-content .menu-part {
    display: block;
    color: var(--text-color);
    padding: 0.8rem 1rem 0.3rem 1rem;
    font-size: 0.65rem;
    font-weight: bold;
    letter-spacing: 0.05em;
    opacity: 0.5;
}
body.invert .dropdown-content .menu-part {
    color: var(--bg-color);
}

.dropdown-content a {
    display: block;
    color: var(--text-color);
    text-decoration: none;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    transition: all 0.2s ease;
}
.dropdown-content a:hover {
    background: var(--text-color);
    color: var(--bg-color);
}

/* Invert logic for dropdown */
body.invert .dropdown-content {
    background: var(--text-color);
    border-color: var(--bg-color);
}
body.invert .dropdown-content a {
    color: var(--bg-color);
}
body.invert .dropdown-content a:hover {
    background: var(--bg-color);
    color: var(--text-color);
}

/* VISUAL BACKGROUND */
.visual-container {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    z-index: 0;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* BACKGROUND LAYERS */
.bg-layer {
    position: absolute;
    /* Make the canvas huge so panning/scaling doesn't show edges */
    top: -50vh; left: -50vw; right: -50vw; bottom: -50vh;
    opacity: 0; /* All layers hidden by default */
    transition: opacity 1.5s ease, transform 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    transform-origin: center center;
    background-position: center center;
}

.bg-layer.is-active {
    opacity: 0.5; /* Show active layer with transparency */
}

body.invert .bg-layer.is-active {
    opacity: 0.2; /* In dark mode, lower opacity for better contrast with text */
}

/* Grid Layer */
.bg-layer.grid {
    background-size: 50px 50px;
    background-image: 
        linear-gradient(to right, var(--text-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--text-color) 1px, transparent 1px);
}

/* Map Layer */
.bg-layer.map {
    background-image: url('images/mapa_montevideo.jpg');
    background-size: cover;
    background-repeat: no-repeat;
}

/* Bio Layer */
.bg-layer.bio {
    background-image: url('images/textura_celular.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.bio {
    mix-blend-mode: screen;
}

/* Space Layer */
.bg-layer.space {
    background-color: transparent;
    background-image: 
        radial-gradient(circle at center, var(--text-color) 1px, transparent 1px),
        radial-gradient(circle at center, var(--text-color) 2px, transparent 2px);
    background-size: 100px 100px, 300px 300px;
    background-position: 0 0, 50px 50px;
}

/* --- TIME LAYERS --- */
.bg-layer.geology {
    background-image: url('images/tex_geology.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.geology { mix-blend-mode: screen; }

.bg-layer.frequency {
    background-image: url('images/tex_frequency.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.frequency { mix-blend-mode: screen; }

.bg-layer.decay {
    background-image: url('images/tex_decay.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.decay { mix-blend-mode: screen; }

.bg-layer.entropy {
    background-image: url('images/tex_entropy.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.entropy { mix-blend-mode: screen; }

/* --- SOCIETY LAYERS --- */
.bg-layer.soc-individual {
    background-image: url('images/tex_soc_individual.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.soc-individual { mix-blend-mode: screen; }

.bg-layer.soc-crowd {
    background-image: url('images/tex_soc_crowd.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.soc-crowd { mix-blend-mode: screen; }

.bg-layer.soc-network {
    background-image: url('images/tex_soc_network.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.soc-network { mix-blend-mode: screen; }

.bg-layer.soc-data {
    background-image: url('images/tex_soc_data.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
    filter: grayscale(100%);
}
body.invert .bg-layer.soc-data { mix-blend-mode: screen; }

/* SCALE OBJECT */
.scale-object {
    width: 200px;
    height: 200px;
    border: 4px solid var(--text-color);
    transition: all 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    transform-origin: center center;
}

.scale-object.circle { border-radius: 50%; }
.scale-object.dot { border-radius: 50%; width: 8px; height: 8px; background: var(--text-color); }
.scale-object.square { border-radius: 0; }
.scale-object.line { height: 4px; width: 200vw; background: var(--text-color); border: none; }



/* --- WORD LAYERS (PROLOGUE) --- */
.bg-layer.word-matrix {
    background-image: url('images/tex_word_matrix.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.word-matrix { mix-blend-mode: screen; }

.bg-layer.word-noise {
    background-image: url('images/tex_word_noise.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.word-noise { mix-blend-mode: screen; }

.bg-layer.word-fragment {
    background-image: url('images/tex_word_fragment.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.word-fragment { mix-blend-mode: screen; }

.bg-layer.music-notation {
    background-image: url('images/tex_music_notation.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.music-notation { mix-blend-mode: screen; }

.bg-layer.music-waveform {
    background-image: url('images/tex_music_waveform.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.music-waveform { mix-blend-mode: screen; }

.bg-layer.music-resonance {
    background-image: url('images/tex_music_resonance.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.music-resonance { mix-blend-mode: screen; }

.bg-layer.visual-miniature {
    background-image: url('images/tex_visual_miniature.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.visual-miniature { mix-blend-mode: screen; }

.bg-layer.visual-brushstroke {
    background-image: url('images/tex_visual_brushstroke.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.visual-brushstroke { mix-blend-mode: screen; }

.bg-layer.visual-landscape {
    background-image: url('images/tex_visual_landscape.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.visual-landscape { mix-blend-mode: screen; }

.bg-layer.narr-page {
    background-image: url('images/tex_narr_page.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.narr-page { mix-blend-mode: screen; }

.bg-layer.narr-ink {
    background-image: url('images/tex_narr_ink.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.narr-ink { mix-blend-mode: screen; }

.bg-layer.narr-library {
    background-image: url('images/tex_narr_library.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.narr-library { mix-blend-mode: screen; }

.bg-layer.cine-celluloid {
    background-image: url('images/tex_cine_celluloid.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.cine-celluloid { mix-blend-mode: screen; }

.bg-layer.cine-light {
    background-image: url('images/tex_cine_light.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.cine-light { mix-blend-mode: screen; }

.bg-layer.cine-dark {
    background-image: url('images/tex_cine_dark.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.cine-dark { mix-blend-mode: screen; }

/* --- SPACE LAYERS --- */
.bg-layer.space-void {
    background-image: url('images/tex_space_void.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.space-void { mix-blend-mode: screen; }

.bg-layer.space-orbit {
    background-image: url('images/tex_space_orbit.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.space-orbit { mix-blend-mode: screen; }

.bg-layer.space-dust {
    background-image: url('images/tex_space_dust.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.space-dust { mix-blend-mode: screen; }

/* --- COMPLEXITY LAYERS --- */
.bg-layer.complex-fractal {
    background-image: url('images/tex_complex_fractal.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.complex-fractal { mix-blend-mode: screen; }

.bg-layer.complex-chaos {
    background-image: url('images/tex_complex_chaos.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.complex-chaos { mix-blend-mode: screen; }

.bg-layer.complex-emergence {
    background-image: url('images/tex_complex_emergence.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.complex-emergence { mix-blend-mode: screen; }

/* --- INFORMATION LAYERS --- */
.bg-layer.info-noise {
    background-image: url('images/tex_info_noise.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.info-noise { mix-blend-mode: screen; }

.bg-layer.info-signal {
    background-image: url('images/tex_info_signal.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.info-signal { mix-blend-mode: screen; }

.bg-layer.info-library {
    background-image: url('images/tex_info_library.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.info-library { mix-blend-mode: screen; }

/* --- ENERGY LAYERS --- */
.bg-layer.energy-plasma {
    background-image: url('images/tex_energy_plasma.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.energy-plasma { mix-blend-mode: screen; }

.bg-layer.energy-fusion {
    background-image: url('images/tex_energy_fusion.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.energy-fusion { mix-blend-mode: screen; }

.bg-layer.energy-dissipation {
    background-image: url('images/tex_energy_dissipation.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    mix-blend-mode: multiply;
}
body.invert .bg-layer.energy-dissipation { mix-blend-mode: screen; }

/* SCROLL CONTENT */
.content-scroll {
    position: relative;
    z-index: 10;
}

.step {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    opacity: 0.15;
    transition: opacity 0.8s ease;
}

.step.is-active {
    opacity: 1;
}

.text-block {
    max-width: 600px;
    background: var(--bg-color);
    padding: 2.5rem;
    border: 1px solid var(--text-color);
    box-shadow: 12px 12px 0px var(--text-color);
    transition: all 0.8s ease;
}

.step.hero h1 {
    font-size: 8vw;
    line-height: 0.9;
    letter-spacing: -0.04em;
    text-align: center;
    font-weight: 900;
    background: var(--bg-color);
    padding: 2rem;
    border: 2px solid var(--text-color);
    box-shadow: 12px 12px 0px var(--text-color);
    transition: all 0.8s ease;
}

.step h2 {
    font-family: var(--mono-font);
    font-size: 1rem;
    text-transform: uppercase;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--text-color);
    padding-bottom: 0.5rem;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
}

.section-link-btn {
    font-family: var(--mono-font);
    font-size: 0.72rem;
    color: var(--text-color);
    background: transparent;
    border: 1px solid transparent;
    padding: 0.1rem 0.35rem;
    cursor: pointer;
    opacity: 0.45;
    text-decoration: none;
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.section-link-btn:hover {
    opacity: 1;
    border-color: var(--text-color);
    background: var(--text-color);
    color: var(--bg-color);
}

.step p {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}
.step p:last-child {
    margin-bottom: 0;
}

.nav-button {
    display: inline-block;
    padding: 1.5rem 2rem;
    border: 2px solid var(--text-color);
    color: var(--text-color);
    text-decoration: none;
    font-family: var(--mono-font);
    font-weight: bold;
    background: var(--bg-color);
    transition: all 0.3s ease;
    box-shadow: 6px 6px 0px var(--text-color);
}
.nav-button:hover {
    background: var(--text-color);
    color: var(--bg-color);
    box-shadow: 0px 0px 0px var(--text-color);
    transform: translate(6px, 6px);
}


/* READING MODE (MICRO SCALE) */
.full-text {
    display: none;
    font-size: 1.15rem;
    line-height: 1.6;
    margin-top: 1.5rem;
}

.text-block.expanded {
    position: fixed;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    width: 90vw;
    height: 90vh;
    max-width: 800px;
    z-index: 1000;
    overflow-y: auto;
    padding: 3rem;
    box-shadow: 20px 20px 0px var(--text-color);
}

.text-block.expanded .summary-text {
    display: none;
}

.text-block.expanded .full-text {
    display: block;
}

.action-btn {
    display: inline-block;
    margin-top: 1.5rem;
    padding: 0.75rem 1rem;
    background: var(--text-color);
    color: var(--bg-color);
    font-family: var(--mono-font);
    font-size: 0.8rem;
    font-weight: bold;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    transition: all 0.3s ease;
}
.action-btn:hover {
    transform: translate(2px, 2px);
    opacity: 0.8;
}

.action-btn.collapse-btn {
    display: none;
    position: sticky;
    top: 0;
    margin-bottom: 2rem;
    z-index: 10;
    width: 100%;
}

.text-block.expanded .action-btn.collapse-btn {
    display: block;
}

/* Dim backgrounds and disable scroll when reading */
body.is-reading-mode {
    overflow: hidden;
}
body.is-reading-mode .bg-layer {
    opacity: 0.05 !important;
}

@media (max-width: 768px) {
    .step p { font-size: 1.1rem; }
    
    /* Hide decorative UI elements but keep navigation */
    .ui-top-left, .ui-bottom-left, .ui-bottom-right {
        display: none;
    }
    
    .ui-top-right {
        top: 1rem;
        right: 1rem;
    }
    
    .text-block { box-shadow: 6px 6px 0px var(--text-color); padding: 1.5rem; }
    
    .text-block.expanded {
        width: 92vw;
        height: 95vh;
        padding: 1.5rem;
        box-shadow: 8px 8px 0px var(--text-color);
    }
}