/* ============================================
   mujun.io - Celestial Terminal Logbook
   ============================================ */
:root {
    --charcoal-void: #1C1A17;
    --obsidian-panel: #14120F;
    --aged-vellum: #E8DCC8;
    --parchment-ink: #3B3226;
    --faded-phosphor: #D4C5A0;
    --amber-glow: #D4A017;
    --celestial-teal: #4A8B8C;
    --supernova-gold: #F0C75E;
    --nebula-dust: #6B5B4E;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    background: var(--charcoal-void);
    color: var(--faded-phosphor);
    font-family: 'Libre Baskerville', serif;
    font-weight: 400;
    font-size: 18px;
    line-height: 1.7;
    font-feature-settings: "liga" 1, "kern" 1;
    overflow-x: hidden;
}

/* --- CRT Scan Lines --- */
.crt-overlay {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 1000;
    background: repeating-linear-gradient(
        0deg,
        transparent 0px,
        transparent 2px,
        rgba(255,255,255,0.02) 2px,
        rgba(255,255,255,0.02) 3px
    );
}

/* --- Scroll Progress Rail --- */
.progress-rail {
    position: fixed;
    left: 5%;
    top: 10vh;
    bottom: 10vh;
    width: 1px;
    background: rgba(107, 91, 78, 0.2);
    z-index: 50;
}
.progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 0%;
    background: var(--amber-glow);
    transition: height 0.1s linear;
}
.progress-star {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    color: var(--nebula-dust);
    cursor: pointer;
    transition: color 0.3s ease;
}
.progress-star:nth-child(2) { top: 0%; }
.progress-star:nth-child(3) { top: 16.6%; }
.progress-star:nth-child(4) { top: 33.3%; }
.progress-star:nth-child(5) { top: 50%; }
.progress-star:nth-child(6) { top: 66.6%; }
.progress-star:nth-child(7) { top: 83.3%; }
.progress-star.active {
    color: var(--amber-glow);
}

/* --- Star Fields --- */
.star-field {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.star-field--sparse {
    background-image:
        radial-gradient(1px 1px at 10% 20%, rgba(255,255,255,0.08), transparent),
        radial-gradient(1px 1px at 30% 60%, rgba(255,255,255,0.06), transparent),
        radial-gradient(1px 1px at 55% 15%, rgba(255,255,255,0.10), transparent),
        radial-gradient(1px 1px at 70% 45%, rgba(255,255,255,0.05), transparent),
        radial-gradient(1px 1px at 85% 80%, rgba(255,255,255,0.08), transparent),
        radial-gradient(1px 1px at 45% 90%, rgba(255,255,255,0.06), transparent),
        radial-gradient(1px 1px at 20% 75%, rgba(255,255,255,0.07), transparent),
        radial-gradient(1px 1px at 90% 10%, rgba(255,255,255,0.09), transparent);
}
.star-field--medium {
    background-image:
        radial-gradient(1px 1px at 5% 10%, rgba(255,255,255,0.10), transparent),
        radial-gradient(1px 1px at 15% 40%, rgba(255,255,255,0.08), transparent),
        radial-gradient(1px 1px at 25% 70%, rgba(255,255,255,0.12), transparent),
        radial-gradient(1px 1px at 40% 20%, rgba(255,255,255,0.07), transparent),
        radial-gradient(1px 1px at 50% 55%, rgba(255,255,255,0.10), transparent),
        radial-gradient(1px 1px at 65% 85%, rgba(255,255,255,0.08), transparent),
        radial-gradient(1px 1px at 75% 30%, rgba(255,255,255,0.11), transparent),
        radial-gradient(1px 1px at 85% 65%, rgba(255,255,255,0.09), transparent),
        radial-gradient(1px 1px at 92% 45%, rgba(255,255,255,0.06), transparent),
        radial-gradient(1px 1px at 35% 95%, rgba(255,255,255,0.10), transparent);
}
.star-field--dense {
    background-image:
        radial-gradient(1px 1px at 3% 8%, rgba(255,255,255,0.14), transparent),
        radial-gradient(1px 1px at 12% 35%, rgba(255,255,255,0.10), transparent),
        radial-gradient(1px 1px at 22% 65%, rgba(255,255,255,0.16), transparent),
        radial-gradient(1px 1px at 33% 15%, rgba(255,255,255,0.12), transparent),
        radial-gradient(1px 1px at 42% 50%, rgba(255,255,255,0.14), transparent),
        radial-gradient(1px 1px at 55% 80%, rgba(255,255,255,0.10), transparent),
        radial-gradient(1px 1px at 63% 25%, rgba(255,255,255,0.15), transparent),
        radial-gradient(1px 1px at 75% 60%, rgba(255,255,255,0.12), transparent),
        radial-gradient(1px 1px at 84% 40%, rgba(255,255,255,0.08), transparent),
        radial-gradient(1px 1px at 92% 75%, rgba(255,255,255,0.14), transparent),
        radial-gradient(1px 1px at 8% 90%, rgba(255,255,255,0.11), transparent),
        radial-gradient(1px 1px at 48% 5%, rgba(255,255,255,0.13), transparent);
}
.star-field--bright {
    background-image:
        radial-gradient(1.5px 1.5px at 5% 12%, rgba(255,255,255,0.20), transparent),
        radial-gradient(1px 1px at 15% 38%, rgba(255,255,255,0.18), transparent),
        radial-gradient(1.5px 1.5px at 28% 60%, rgba(255,255,255,0.22), transparent),
        radial-gradient(1px 1px at 38% 18%, rgba(255,255,255,0.16), transparent),
        radial-gradient(1.5px 1.5px at 48% 48%, rgba(255,255,255,0.20), transparent),
        radial-gradient(1px 1px at 58% 78%, rgba(255,255,255,0.18), transparent),
        radial-gradient(1.5px 1.5px at 68% 28%, rgba(255,255,255,0.22), transparent),
        radial-gradient(1px 1px at 78% 55%, rgba(255,255,255,0.16), transparent),
        radial-gradient(1px 1px at 88% 42%, rgba(255,255,255,0.14), transparent),
        radial-gradient(1.5px 1.5px at 95% 70%, rgba(255,255,255,0.20), transparent),
        radial-gradient(1px 1px at 10% 85%, rgba(255,255,255,0.18), transparent),
        radial-gradient(1.5px 1.5px at 42% 8%, rgba(255,255,255,0.22), transparent),
        radial-gradient(1px 1px at 72% 90%, rgba(255,255,255,0.16), transparent),
        radial-gradient(1px 1px at 35% 35%, rgba(255,255,255,0.15), transparent);
    animation: starDrift 120s linear infinite;
}
@keyframes starDrift {
    0% { transform: translateY(0); }
    100% { transform: translateY(-30px); }
}

/* --- Observations (Sections) --- */
.observation {
    position: relative;
    min-height: 100vh;
    padding: 10vh 0;
    display: flex;
    align-items: center;
}
.obs-content {
    position: relative;
    z-index: 5;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15%;
    display: flex;
    gap: 3rem;
    width: 100%;
}
.obs-main {
    flex: 0 0 60%;
    max-width: 60%;
}
.obs-margin {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2rem;
    padding-top: 4rem;
}
.obs-margin--dense {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    padding-top: 2rem;
}

/* --- Mujun Watermark --- */
.mujun-watermark {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: 30vw;
    color: var(--amber-glow);
    opacity: 0.03;
    pointer-events: none;
    z-index: 1;
    transition: opacity 1s ease;
}
.mujun-watermark.faded {
    opacity: 0;
}

/* --- Scan Line Boot --- */
.scan-line {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--amber-glow), transparent);
    opacity: 0.6;
    z-index: 10;
    animation: scanBoot 2s ease-out forwards;
}
@keyframes scanBoot {
    0% { top: 0; opacity: 0.6; }
    100% { top: 100%; opacity: 0; }
}

/* --- Typography --- */
.site-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: 56px;
    letter-spacing: 0.04em;
    color: var(--amber-glow);
    text-shadow: 0 0 20px rgba(212, 160, 23, 0.3);
    opacity: 0;
    animation: fadeIn 1.5s ease-out 2s forwards;
}
@keyframes fadeIn {
    to { opacity: 1; }
}
.obs-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: clamp(36px, 5vw, 60px);
    letter-spacing: 0.04em;
    color: var(--amber-glow);
    text-shadow: 0 0 20px rgba(212, 160, 23, 0.3);
    margin-bottom: 2rem;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.obs-title.visible {
    opacity: 1;
    transform: translateY(0);
}
.obs-title--dark {
    color: var(--parchment-ink);
    text-shadow: none;
}
.obs-title--gold {
    color: var(--supernova-gold);
    text-shadow: 0 0 25px rgba(240, 199, 94, 0.3);
}
.obs-body {
    font-family: 'Libre Baskerville', serif;
    font-weight: 400;
    font-size: 18px;
    line-height: 1.7;
    color: var(--faded-phosphor);
    margin-bottom: 1.5rem;
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.obs-body.visible {
    opacity: 1;
    transform: translateY(0);
}
.obs-body--dark {
    color: var(--parchment-ink);
}
.obs-body--final {
    font-style: italic;
    color: var(--faded-phosphor);
    opacity: 0;
}
.obs-body--final.visible {
    opacity: 0.7;
}
.obs-body em {
    font-style: italic;
}

/* --- Terminal Blocks --- */
.terminal-block {
    background: var(--obsidian-panel);
    border: 1px solid rgba(184, 134, 11, 0.4);
    border-radius: 2px;
    padding: 1.2rem 1.5rem;
    margin: 1.5rem 0;
    box-shadow: inset 0 0 20px rgba(212, 160, 23, 0.05);
    opacity: 0;
    transition: opacity 1.5s ease-out;
}
.terminal-block.active {
    opacity: 1;
}
.terminal-block--inline {
    margin: 1.5rem 0;
}
.terminal-block--light {
    background: #2A2520;
    border-color: rgba(59, 50, 38, 0.5);
}
.terminal-line {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 14px;
    line-height: 1.6;
    color: #C49B32;
    overflow: hidden;
    white-space: nowrap;
    width: 0;
}
.terminal-line.typing {
    animation: typeIn 0.8s steps(40) forwards;
}
@keyframes typeIn {
    to { width: 100%; }
}
.terminal-line--teal { color: var(--celestial-teal); }
.terminal-line--gold { color: var(--supernova-gold); }
.terminal-line--dark { color: var(--parchment-ink); }
.terminal-line--teal-dark { color: #3A7A7B; }

/* --- Inverted Observation (The Shield) --- */
.observation--inverted {
    background: var(--aged-vellum);
    position: relative;
}
.observation--inverted::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(15px 15px at 20% 30%, rgba(139, 115, 85, 0.10), transparent),
        radial-gradient(10px 10px at 60% 70%, rgba(139, 115, 85, 0.08), transparent),
        radial-gradient(12px 12px at 80% 20%, rgba(139, 115, 85, 0.10), transparent);
    pointer-events: none;
}

/* --- Bright Observation (Resolution) --- */
.observation--bright .obs-title {
    color: var(--supernova-gold);
}

/* --- Inline Code --- */
.inline-code {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 0.85em;
    background: var(--obsidian-panel);
    color: #C49B32;
    padding: 0.15em 0.4em;
    border-radius: 2px;
}

/* --- Margin Notes --- */
.margin-note {
    font-family: 'Libre Baskerville', serif;
    font-style: italic;
    font-size: 14px;
    line-height: 1.6;
    color: var(--nebula-dust);
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}
.margin-note.visible {
    opacity: 0.7;
    transform: translateY(0);
}
.margin-note--dark {
    color: var(--nebula-dust);
}
.margin-star {
    font-size: 12px;
    color: var(--amber-glow);
    opacity: 0.5;
    display: block;
}

/* --- Constellations --- */
.constellation {
    opacity: 0;
    transition: opacity 1s ease-out;
}
.constellation.visible {
    opacity: 1;
}
.constellation--wide {
    width: 100%;
    max-width: 700px;
    height: auto;
}
.wide-constellation {
    padding: 2rem 15%;
    position: relative;
    z-index: 5;
}

/* --- Split View (Paradox) --- */
.split-view {
    display: flex;
    gap: 0;
    align-items: flex-start;
}
.split-terminal {
    flex: 0 0 45%;
}
.split-divider {
    width: 1px;
    min-height: 200px;
    background: var(--amber-glow);
    opacity: 0.3;
    margin: 0 1.5rem;
    flex-shrink: 0;
}
.split-prose {
    flex: 1;
}

/* --- Void Spaces --- */
.void-space {
    height: 50vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}
.void-space--short {
    height: 30vh;
}
.void-stars {
    font-size: 10px;
    color: var(--nebula-dust);
    opacity: 0.3;
    letter-spacing: 0.5em;
}

/* --- Final Void & Footer --- */
.final-void {
    position: relative;
    height: 30vh;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 2rem;
}
.site-footer {
    position: relative;
    z-index: 5;
}
.footer-text {
    font-family: 'IBM Plex Mono', monospace;
    font-size: 12px;
    color: var(--nebula-dust);
    letter-spacing: 0.05em;
}

/* --- Responsive --- */
@media (max-width: 900px) {
    .obs-content {
        flex-direction: column;
        padding: 0 8%;
    }
    .obs-main {
        flex: 1;
        max-width: 100%;
    }
    .obs-margin {
        padding-top: 1rem;
    }
    .split-view {
        flex-direction: column;
    }
    .split-divider {
        width: 100%;
        height: 1px;
        min-height: auto;
        margin: 1.5rem 0;
    }
    .progress-rail {
        display: none;
    }
    .wide-constellation {
        padding: 2rem 5%;
    }
}
@media (max-width: 600px) {
    body { font-size: 16px; }
    .site-title { font-size: 40px; }
    .obs-content { padding: 0 5%; }
    .void-space { height: 30vh; }
    .mujun-watermark { font-size: 50vw; }
}