/* ============================================
   mysterious.quest - Monochrome HUD Visor
   ============================================ */
:root {
    --void-black: #0A0A0A;
    --graphite: #1A1A1A;
    --slate-wash: #2C2C2C;
    --silver-wire: #5A5A5A;
    --smoke: #B8B8B8;
    --bright-white: #F0F0F0;
    --beacon: #E8E8E8;
    --flash-white: #FFFFFF;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
    background: var(--void-black);
    color: var(--smoke);
    font-family: 'Fira Sans', sans-serif;
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.8;
    letter-spacing: 0.02em;
    overflow-x: hidden;
    /* Dot grid underlay */
    background-image: radial-gradient(circle, var(--slate-wash) 1px, transparent 1px);
    background-size: 40px 40px;
}

/* --- HUD Visor Frame --- */
.hud-frame {
    position: fixed;
    inset: 24px;
    z-index: 100;
    pointer-events: none;
    border: 1px solid var(--silver-wire);
    opacity: 0;
    animation: frameDrawIn 1.5s ease-out 0.3s forwards;
}
@keyframes frameDrawIn {
    0% { clip-path: inset(48% 48% 48% 48%); opacity: 0; }
    50% { opacity: 0.7; }
    100% { clip-path: inset(0 0 0 0); opacity: 1; }
}

/* Corner brackets */
.hud-corner {
    position: absolute;
    width: 40px;
    height: 40px;
    border-color: var(--bright-white);
    border-style: solid;
    border-width: 0;
    transition: all 600ms ease;
}
.hud-corner--tl { top: -1px; left: -1px; border-top-width: 2px; border-left-width: 2px; }
.hud-corner--tr { top: -1px; right: -1px; border-top-width: 2px; border-right-width: 2px; }
.hud-corner--bl { bottom: -1px; left: -1px; border-bottom-width: 2px; border-left-width: 2px; }
.hud-corner--br { bottom: -1px; right: -1px; border-bottom-width: 2px; border-right-width: 2px; }
.hud-frame.expanded .hud-corner { width: 48px; height: 48px; }

/* HUD labels */
.hud-label {
    position: absolute;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 10px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--silver-wire);
}
.hud-label--tl { top: 8px; left: 48px; }
.hud-label--tr { top: 8px; right: 48px; }
.hud-label--bl { bottom: 8px; left: 48px; }
.hud-label--br { bottom: 8px; right: 48px; }

/* --- Data Sidebar --- */
.data-sidebar {
    position: fixed;
    right: 48px;
    top: 50%;
    transform: translateY(-50%);
    width: 120px;
    z-index: 99;
    display: flex;
    flex-direction: column;
    gap: 12px;
    pointer-events: none;
}
.sidebar-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.sidebar-key {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 0.6rem;
    letter-spacing: 0.08em;
    color: var(--silver-wire);
    text-transform: uppercase;
}
.sidebar-val {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.04em;
    color: var(--beacon);
}
.sidebar-progress {
    width: 100%;
    height: 2px;
    background: var(--slate-wash);
}
.sidebar-progress-bar {
    height: 100%;
    width: 0%;
    background: var(--beacon);
    transition: width 300ms ease;
}
.sidebar-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--beacon);
    animation: dotPulse 3s ease-in-out infinite;
    align-self: center;
}
@keyframes dotPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* --- Sectors --- */
.sector {
    position: relative;
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: clamp(3rem, 6vw, 6rem);
    padding-left: clamp(3rem, 6vw, 8rem);
    padding-right: clamp(3rem, 6vw, 12rem);
    z-index: 1;
}
.sector-content--left {
    grid-column: 1;
    padding-right: 2rem;
}
.sector-content--right {
    grid-column: 2;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sector-content--center {
    grid-column: 1 / -1;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

/* --- Sector Titles --- */
.sector-title {
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 6vw, 5rem);
    letter-spacing: 0.06em;
    color: var(--bright-white);
    line-height: 1.1;
    margin-bottom: 2rem;
    text-transform: uppercase;
}

/* --- Hero Statement --- */
.hero-statement {
    font-family: 'Exo 2', sans-serif;
    font-weight: 200;
    font-size: clamp(3rem, 10vw, 8rem);
    letter-spacing: 0.06em;
    color: var(--bright-white);
    line-height: 1.05;
    text-transform: uppercase;
}
.hero-statement .char {
    display: inline-block;
    opacity: 0;
    animation: charReveal 0.3s ease-out forwards;
}
@keyframes charReveal {
    to { opacity: 1; }
}
.scroll-hint {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    color: var(--silver-wire);
    margin-top: 3rem;
    text-transform: uppercase;
    animation: hintPulse 2s ease-in-out infinite;
}
@keyframes hintPulse {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 0.8; }
}

/* --- Sector Body Text --- */
.sector-body {
    font-family: 'Fira Sans', sans-serif;
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--smoke);
    margin-bottom: 1.5rem;
    max-width: 45ch;
}

/* --- Coordinate Labels --- */
.coord-label {
    position: absolute;
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    color: var(--silver-wire);
    opacity: 0;
    transition: opacity 600ms ease;
}
.coord-label--inline {
    position: relative;
    display: inline-block;
    margin-top: 1rem;
}
.sector .coord-label {
    bottom: 3rem;
    left: 4rem;
}
[data-reveal].visible ~ .coord-label,
.coord-label--inline {
    opacity: 0.6;
}

/* --- Wireframe Dodecahedron --- */
.wireframe-dodecahedron {
    position: relative;
    width: 200px;
    height: 200px;
    animation: spinSlow 20s linear infinite;
}
@keyframes spinSlow {
    to { transform: rotate(360deg); }
}
.dodec-ring {
    position: absolute;
    inset: 0;
    border: 1px solid var(--bright-white);
    border-radius: 50%;
    opacity: 0;
    animation: fadeInDelay 1s ease-out forwards;
}
.dodec-ring--1 { transform: rotateX(0deg); animation-delay: 0.5s; }
.dodec-ring--2 { transform: rotateX(60deg); animation-delay: 0.7s; }
.dodec-ring--3 { transform: rotateY(60deg); animation-delay: 0.9s; }
.dodec-ring--4 { transform: rotateY(120deg); animation-delay: 1.1s; }
@keyframes fadeInDelay {
    to { opacity: 0.7; }
}
.dodec-vertex {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 4px;
    height: 4px;
    margin: -2px;
    background: var(--flash-white);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--flash-white);
}

/* --- Cube Stack --- */
.cube-stack {
    position: relative;
    width: 160px;
    height: 200px;
}
.cube {
    position: absolute;
    width: 80px;
    height: 80px;
    border: 1px solid var(--silver-wire);
    animation: cubeRotate 15s linear infinite;
}
.cube--1 { top: 0; left: 40px; background: var(--graphite); animation-delay: 0s; }
.cube--2 { top: 60px; left: 10px; background: var(--slate-wash); animation-delay: -5s; }
.cube--3 { top: 120px; left: 50px; background: var(--graphite); animation-delay: -10s; }
@keyframes cubeRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* --- Sphere --- */
.sphere-wrapper {
    margin: 2rem 0;
}
.sphere {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle at 35% 35%, var(--slate-wash), var(--void-black));
    border: 1px solid var(--silver-wire);
    position: relative;
    overflow: hidden;
}
.sphere-band {
    position: absolute;
    top: 50%;
    left: -10%;
    right: -10%;
    height: 12px;
    margin-top: -6px;
    background: repeating-linear-gradient(
        90deg,
        transparent,
        transparent 3px,
        var(--silver-wire) 3px,
        var(--silver-wire) 4px
    );
    opacity: 0.5;
    transform: skewY(-5deg);
}

/* --- Glyph Grid --- */
.glyph-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    max-width: 400px;
    margin: 2rem auto 0;
}
.glyph-card {
    width: 100%;
    aspect-ratio: 1;
    max-width: 120px;
    background: var(--graphite);
    border: 1px solid var(--silver-wire);
    display: flex;
    align-items: center;
    justify-content: center;
    transform: scale(0.95);
    opacity: 0;
    transition: transform 400ms ease, opacity 400ms ease;
}
.glyph-card.pulsed {
    transform: scale(1);
    opacity: 1;
}
.glyph {
    font-size: 2rem;
    color: var(--bright-white);
}

/* --- Monolith --- */
.monolith {
    position: relative;
    width: 80px;
    height: 240px;
    margin: 2rem 0;
}
.monolith-shard {
    position: absolute;
    width: 100%;
    background: var(--graphite);
    border: 1px solid var(--silver-wire);
    transition: transform 800ms ease;
}
.monolith-shard--1 { top: 0; height: 70px; }
.monolith-shard--2 { top: 76px; height: 80px; transform: translateX(8px); }
.monolith-shard--3 { top: 162px; height: 78px; transform: translateX(-4px); }
.monolith-debris {
    position: absolute;
    inset: 0;
    pointer-events: none;
}
.monolith-debris::before,
.monolith-debris::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--flash-white);
    border-radius: 50%;
    animation: debrisDrift 4s ease-in-out infinite;
}
.monolith-debris::before { top: 75px; left: 50%; }
.monolith-debris::after { top: 160px; left: 40%; animation-delay: -2s; }
@keyframes debrisDrift {
    0%, 100% { transform: translate(0, 0); opacity: 0.3; }
    50% { transform: translate(15px, -8px); opacity: 0.8; }
}

/* --- Timeline --- */
.timeline {
    position: relative;
    padding-left: 40px;
}
.timeline-line {
    position: absolute;
    left: 12px;
    top: 0;
    width: 1px;
    height: 0;
    background: var(--silver-wire);
    transition: height 1.5s ease-out;
}
.timeline-line.drawn {
    height: 100%;
}
.timeline-milestone {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    margin-bottom: 2rem;
    position: relative;
}
.milestone-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 1px solid var(--silver-wire);
    background: var(--void-black);
    flex-shrink: 0;
    position: absolute;
    left: -34px;
    top: 4px;
    transition: background 400ms ease, box-shadow 400ms ease;
}
.milestone-dot.active {
    background: var(--beacon);
    box-shadow: 0 0 12px rgba(232, 232, 232, 0.4);
}
.milestone-label {
    font-family: 'Fira Sans', sans-serif;
    font-weight: 600;
    font-size: 0.75rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--bright-white);
    display: block;
    margin-bottom: 0.25rem;
}
.milestone-desc {
    font-family: 'Fira Sans', sans-serif;
    font-weight: 300;
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--smoke);
    max-width: 35ch;
}

/* --- Torus Knot --- */
.torus-knot {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 2rem auto;
    animation: spinSlow 25s linear infinite;
}
.torus-ring {
    position: absolute;
    inset: 0;
    border: 2px solid transparent;
    border-radius: 50%;
}
.torus-ring--1 {
    border-color: var(--bright-white);
    transform: rotateX(30deg) rotateZ(0deg);
}
.torus-ring--2 {
    border-color: var(--smoke);
    transform: rotateX(30deg) rotateZ(60deg);
    inset: 15px;
}
.torus-ring--3 {
    border-color: var(--silver-wire);
    transform: rotateX(30deg) rotateZ(120deg);
    inset: 30px;
}

/* --- Finale --- */
.finale-title {
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    font-size: clamp(1.5rem, 4vw, 3.5rem);
    letter-spacing: 0.06em;
    color: var(--bright-white);
    text-transform: uppercase;
    margin: 2rem 0 1rem;
}
.finale-body {
    font-family: 'Fira Sans', sans-serif;
    font-weight: 300;
    font-size: 1rem;
    line-height: 1.8;
    color: var(--smoke);
    max-width: 50ch;
    text-align: center;
}

/* --- Scanline Transition --- */
.scanline-pass {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
}
.scanline {
    position: absolute;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--flash-white);
    opacity: 0;
    top: 0;
}
.scanline.active {
    animation: scanSweep 2s linear forwards;
}
@keyframes scanSweep {
    0% { top: 0; opacity: 0.8; }
    100% { top: 100%; opacity: 0; }
}

/* --- Reveal Animation --- */
[data-reveal] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 500ms ease-in-out, transform 500ms ease-in-out;
}
[data-reveal].visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Signal Pulse --- */
.signal-pulse {
    position: absolute;
    pointer-events: none;
}
.signal-pulse .ring {
    position: absolute;
    border: 1px solid var(--beacon);
    border-radius: 50%;
    animation: ringExpand 1.5s ease-out forwards;
}
@keyframes ringExpand {
    0% { width: 0; height: 0; opacity: 0.8; top: 50%; left: 50%; transform: translate(-50%, -50%); }
    100% { width: 120px; height: 120px; opacity: 0; top: 50%; left: 50%; transform: translate(-50%, -50%); }
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 768px) {
    .hud-frame { inset: 12px; }
    .hud-label--tl, .hud-label--bl { left: 24px; }
    .hud-label--tr, .hud-label--br { right: 24px; }
    .data-sidebar { display: none; }
    .sector {
        grid-template-columns: 1fr;
        padding: 3rem 2rem;
    }
    .sector-content--right {
        grid-column: 1;
        margin-top: 2rem;
    }
    .sector-content--left {
        padding-right: 0;
    }
    .glyph-grid { max-width: 300px; }
    .glyph-card { max-width: 90px; }
    .scanline-pass { height: 40vh; }
}
@media (max-width: 480px) {
    .hud-corner { width: 24px; height: 24px; }
    .hero-statement { font-size: clamp(2rem, 8vw, 4rem); }
}