/* ============================================================
   chika.monster — CSS
   Design: Corporate-Opulent, Single-Column, Tech-Mono, Muted Palette

   Typography System:
   - Space Mono 700 at 64px for void title, 56px for headings, 80px fills the narrowed column
   - Space Mono at 96px for display headings — treating a fixed-width coding font as a luxury
     display typeface — creates immediate visual tension that is unique in this collection.
   - Space Mono" (Google Fonts), 700 weight
   - IBM Plex Mono 300 at 15px — IBM Plex Mono at body size creates a ghostly semi-transparent feel
   - IBM Plex Mono" (Google Fonts), 300 weight
   - Roboto Mono 11px `#6B7FD4` (e.g. labels, coordinates, system telemetry)
   - Roboto Mono 400 at 11px for data glyphs
   - Roboto Mono" (Google Fonts), 400 weight

   Scene 3 compression: Maximum magnetism: cursor hover anywhere in this section pulls nearby
   particles 3x more strongly than in earlier sections. Column fills the narrowed viewport.
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
    --void: #0A0B0E;
    --deep-field: #131520;
    --midnight-navy: #1E2235;
    --platinum: #C8CBD4;
    --zinc-ghost: #8B8FA0;
    --slate-horizon: #3D4259;
    --parchment-pulse: #E8E4D8;
    --indigo: #6B7FD4;

    --col-max: 780px;
    --col-narrow: 480px;
    --transition-block: cubic-bezier(0.22, 1, 0.36, 1);

    --font-display: 'Space Mono', monospace;
    --font-sub: 'Share Tech Mono', monospace;
    --font-body: 'IBM Plex Mono', monospace;
    --font-data: 'Roboto Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--void);
    color: var(--platinum);
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 15px;
    line-height: 26px;
    letter-spacing: 0.04em;
    overflow-x: hidden;
    cursor: none;
}

/* --- Custom Cursor --- */
#cursor {
    position: fixed;
    width: 10px;
    height: 10px;
    border: 1px solid var(--indigo);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.15s ease, height 0.15s ease, border-color 0.15s ease, opacity 0.15s ease;
    mix-blend-mode: screen;
}

#cursor.cursor--active {
    width: 20px;
    height: 20px;
    border-color: var(--platinum);
}

/* --- Particle Canvas (Fixed Background) --- */
#particle-canvas {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
}

/* --- Field Lines SVG (Fixed Background) --- */
#field-lines {
    position: fixed;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    width: 100%;
    height: 100%;
    overflow: visible;
}

/* --- Scenes --- */
.scene {
    position: relative;
    z-index: 2;
}

/* ============================================================
   SCENE 1: THE VOID
   ============================================================ */
.scene--void {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    overflow: hidden;
}

.void-center {
    text-align: center;
    position: relative;
    z-index: 2;
    padding: 0 40px;
}

.void-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 64px;
    letter-spacing: 0.02em;
    color: var(--platinum);
    line-height: 1.1;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.void-title.is-visible {
    opacity: 1;
}

.void-descriptor {
    font-family: var(--font-sub);
    font-weight: 400;
    font-size: 16px;
    color: var(--zinc-ghost);
    letter-spacing: 0.12em;
    margin-top: 24px;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.void-descriptor.is-visible {
    opacity: 1;
}

/* ============================================================
   SCENE 2: THE CORPUS
   ============================================================ */
.scene--corpus {
    padding: 160px 0;
    background: transparent;
}

.column-spine {
    max-width: var(--col-max);
    margin: 0 auto;
    position: relative;
    z-index: 2;
    padding: 0 24px;
}

/* Content Blocks */
.content-block {
    position: relative;
    margin-bottom: 160px;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 600ms var(--transition-block), transform 600ms var(--transition-block);
}

.content-block.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.block-label {
    display: block;
    font-family: var(--font-data);
    font-weight: 400;
    font-size: 11px;
    color: var(--indigo);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.block-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 56px;
    line-height: 1.05;
    color: var(--platinum);
    letter-spacing: -0.01em;
    margin-bottom: 40px;
}

.block-body {
    font-family: var(--font-body);
    font-weight: 300;
    font-size: 15px;
    line-height: 26px;
    color: var(--zinc-ghost);
    letter-spacing: 0.04em;
    max-width: 620px;
    margin-bottom: 20px;
}

.block-body:last-child {
    margin-bottom: 0;
}

/* SVG Diagrams */
.block-diagram {
    margin-top: 48px;
    border: 1px solid var(--slate-horizon);
    padding: 24px;
    background: var(--deep-field);
}

.data-viz {
    width: 100%;
    height: auto;
    display: block;
}

/* Margin Data Glyphs */
.margin-data {
    position: absolute;
    top: 0;
    width: 180px;
    font-family: var(--font-data);
    font-size: 11px;
    color: var(--zinc-ghost);
    opacity: 0.06;
    line-height: 1.8;
    letter-spacing: 0.06em;
    pointer-events: none;
    white-space: nowrap;
    overflow: hidden;
}

.margin-data--left {
    right: calc(100% + 20px);
    text-align: right;
}

.margin-data--right {
    left: calc(100% + 20px);
    text-align: left;
}

/* ============================================================
   SCENE 3: THE COMPRESSION
   ============================================================ */
.scene--compression {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--deep-field);
    position: relative;
    overflow: hidden;
    padding: 120px 24px;
}

.scene--compression::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(107, 127, 212, 0.04) 0%, transparent 70%);
    pointer-events: none;
}

.compression-column {
    max-width: var(--col-narrow);
    width: 100%;
    position: relative;
    z-index: 2;
    text-align: center;
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 600ms var(--transition-block), transform 600ms var(--transition-block);
}

.compression-column.is-visible {
    opacity: 1;
    transform: translateY(0);
}

.block-label--final {
    display: block;
    font-family: var(--font-data);
    font-weight: 400;
    font-size: 11px;
    color: var(--indigo);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    margin-bottom: 20px;
}

.compression-heading {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 80px;
    line-height: 1.0;
    color: var(--parchment-pulse);
    letter-spacing: -0.02em;
    margin-bottom: 48px;
}

.compression-sub {
    font-family: var(--font-sub);
    font-size: 16px;
    color: var(--zinc-ghost);
    letter-spacing: 0.08em;
    line-height: 1.7;
    margin-bottom: 64px;
}

/* CTA Button */
.cta-primary {
    display: inline-block;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.2em;
    color: var(--parchment-pulse);
    background: transparent;
    border: 1px solid var(--slate-horizon);
    padding: 18px 48px;
    cursor: none;
    position: relative;
    overflow: hidden;
    transition: border-color 0.3s ease, color 0.3s ease;
}

.cta-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--midnight-navy);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s var(--transition-block);
    z-index: -1;
}

.cta-primary:hover {
    border-color: var(--indigo);
    color: var(--platinum);
}

.cta-primary:hover::before {
    transform: scaleX(1);
}

/* System Status Bar */
.system-status {
    display: flex;
    gap: 32px;
    justify-content: center;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--slate-horizon);
}

.status-item {
    font-family: var(--font-data);
    font-size: 11px;
    color: var(--zinc-ghost);
    letter-spacing: 0.15em;
}

.status-value {
    color: var(--indigo);
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
    .void-title {
        font-size: 40px;
    }

    .block-heading {
        font-size: 40px;
    }

    .compression-heading {
        font-size: 56px;
    }

    .margin-data {
        display: none;
    }
}

@media (max-width: 600px) {
    .void-title {
        font-size: 28px;
        white-space: normal;
        word-break: break-all;
    }

    .block-heading {
        font-size: 32px;
    }

    .compression-heading {
        font-size: 40px;
    }

    .system-status {
        flex-direction: column;
        gap: 12px;
        align-items: center;
    }
}