:root {
    --deep-booth-black: #05070D;
    --submarine-blue: #082C46;
    --signal-cyan: #35F6E8;
    --tape-amber: #FFB84D;
    --static-lavender: #B9A7FF;
    --foam-white: #F5F1E8;
    --needle-red: #FF4B5C;
    --fraunces: 'Fraunces', serif;
    --manrope: 'Manrope', sans-serif;
    --plex: 'IBM Plex Mono', monospace;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--deep-booth-black);
    color: var(--foam-white);
    font-family: var(--manrope);
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        radial-gradient(circle at 14% 82%, rgba(8, 44, 70, .82), transparent 34%),
        radial-gradient(circle at 84% 18%, rgba(53, 246, 232, .08), transparent 28%),
        linear-gradient(90deg, rgba(245, 241, 232, .035) 1px, transparent 1px),
        linear-gradient(0deg, rgba(245, 241, 232, .025) 1px, transparent 1px);
    background-size: auto, auto, 80px 80px, 80px 80px;
    pointer-events: none;
    z-index: 0;
}

.grain {
    position: fixed;
    inset: -20%;
    pointer-events: none;
    z-index: 8;
    opacity: .23;
    background-image:
        radial-gradient(circle, rgba(245, 241, 232, .2) 0 1px, transparent 1.7px),
        radial-gradient(circle, rgba(53, 246, 232, .15) 0 .8px, transparent 1.6px);
    background-size: 31px 37px, 47px 43px;
    animation: grainDrift 7s steps(8) infinite;
    mix-blend-mode: screen;
}

.spectral-fog {
    position: fixed;
    width: 54vw;
    height: 22vh;
    border-radius: 999px;
    filter: blur(34px);
    opacity: .22;
    pointer-events: none;
    z-index: 1;
}

.fog-a { left: -14vw; top: 28vh; background: rgba(8, 44, 70, .9); animation: fogSway 18s ease-in-out infinite; }
.fog-b { right: -18vw; bottom: 18vh; background: rgba(185, 167, 255, .28); animation: fogSway 22s ease-in-out infinite reverse; }

.frequency-hud {
    position: fixed;
    top: 18px;
    left: 22px;
    right: 22px;
    z-index: 12;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    color: rgba(245, 241, 232, .65);
    font-family: var(--plex);
    font-size: clamp(10px, 1vw, 12px);
    letter-spacing: .12em;
    text-transform: uppercase;
}

.frequency-hud b { color: var(--signal-cyan); font-weight: 500; }

.persistent-thread {
    position: fixed;
    inset: 0;
    z-index: 4;
    pointer-events: none;
    opacity: .98;
    transform: translateY(var(--thread-y, 0px));
}

.persistent-thread svg { width: 100%; height: 100%; }

#audibleThread {
    fill: none;
    stroke: var(--signal-cyan);
    stroke-width: 3.2;
    stroke-linecap: round;
    filter: url(#glow);
    stroke-dasharray: 18 10 3 12;
    animation: threadFlow 6s linear infinite, carrierTremble 2.4s ease-in-out infinite;
}

.thread-shadow {
    fill: none;
    stroke: var(--static-lavender);
    stroke-width: 1.4;
    opacity: .38;
    stroke-dasharray: 2 16;
    animation: threadFlow 10s linear infinite reverse;
}

.resonance-cursor {
    position: fixed;
    left: 0;
    top: 0;
    width: 140px;
    height: 140px;
    border: 1px solid rgba(53, 246, 232, .38);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 11;
    opacity: .64;
    box-shadow: inset 0 0 28px rgba(53, 246, 232, .08), 0 0 28px rgba(185, 167, 255, .1);
}

.room { position: relative; z-index: 2; }

.movement {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    padding: clamp(72px, 10vh, 120px) clamp(24px, 6vw, 92px);
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    grid-template-rows: repeat(8, 1fr);
    isolation: isolate;
}

.movement::after {
    content: attr(data-frequency);
    position: absolute;
    right: 4vw;
    bottom: 3vh;
    font-family: var(--plex);
    color: rgba(245, 241, 232, .38);
    letter-spacing: .18em;
    font-size: clamp(11px, 1.2vw, 14px);
}

.movement-copy { position: relative; z-index: 5; max-width: 620px; }
.mono-tag, .annotation, .tape-mark, .shore-label, .final-tuning, .calibration {
    font-family: var(--plex);
    letter-spacing: .14em;
    text-transform: uppercase;
    font-size: 11px;
}
.mono-tag { color: var(--tape-amber); margin: 0 0 18px; }

h1, h2 {
    font-family: var(--fraunces);
    font-optical-sizing: auto;
    margin: 0;
    line-height: .86;
    letter-spacing: -.055em;
    font-weight: 650;
}

h1 { font-size: clamp(64px, 13.5vw, 190px); text-shadow: 0 0 36px rgba(53, 246, 232, .22); }
h1 i { color: var(--needle-red); font-style: normal; }
h2 { font-size: clamp(58px, 10vw, 148px); }
p { font-size: clamp(17px, 1.45vw, 22px); line-height: 1.65; color: rgba(245, 241, 232, .78); }

.carrier { background: radial-gradient(circle at 58% 44%, rgba(8, 44, 70, .45), transparent 36%); }
.opening-copy { grid-column: 2 / 10; grid-row: 4 / 7; opacity: 0; filter: blur(7px); animation: decodeIn 2.8s .45s ease forwards; }
.carrier-line { position: absolute; left: 0; right: 0; top: 49%; height: 1px; background: rgba(53, 246, 232, .28); box-shadow: 0 0 18px rgba(53, 246, 232, .25); transform-origin: left; animation: carrierPulse 3.4s ease-in-out infinite; }
.opening-static { position: absolute; inset: 0; opacity: .3; background-image: radial-gradient(circle, rgba(245,241,232,.3) 0 1px, transparent 1px); background-size: 19px 21px; mask-image: radial-gradient(circle at 42% 52%, black, transparent 62%); }
.large-crop { position: absolute; right: -4vw; top: 8vh; font-family: var(--fraunces); font-size: 44vw; line-height: .7; color: rgba(185, 167, 255, .055); font-weight: 800; }
.calibration.left { position: absolute; left: 5vw; top: 22vh; color: rgba(255, 184, 77, .58); }
.tape-mark { position: absolute; right: 18vw; top: 62vh; color: rgba(245,241,232,.42); transform: rotate(-8deg); }

.hum { background: linear-gradient(180deg, transparent, rgba(8, 44, 70, .35)); }
.hum-copy { grid-column: 7 / 12; grid-row: 2 / 6; align-self: center; }
.wave-chamber { grid-column: 1 / 9; grid-row: 3 / 7; z-index: 3; }
.wave-chamber svg { width: 100%; height: 100%; overflow: visible; }
.local-wave { fill: none; stroke: var(--signal-cyan); stroke-width: 4; stroke-linecap: round; filter: drop-shadow(0 0 16px rgba(53, 246, 232, .75)); stroke-dasharray: 900; animation: drawWave 5s ease-in-out infinite alternate; }
.local-wave.amber { stroke: var(--tape-amber); stroke-width: 1.5; opacity: .68; animation-duration: 7s; }
.speaker-cone { position: absolute; width: 42vw; aspect-ratio: 1; border-radius: 50%; left: -12vw; bottom: -18vw; background: repeating-radial-gradient(circle, rgba(245,241,232,.08) 0 2px, transparent 3px 18px), radial-gradient(circle, rgba(8,44,70,.8), transparent 68%); opacity: .72; }
.annotation { color: rgba(255,184,77,.76); }
.crest-note { position: absolute; left: 38vw; top: 24vh; }

.drift { background: radial-gradient(circle at 70% 44%, rgba(185, 167, 255, .12), transparent 42%); }
.drift-copy { grid-column: 2 / 7; grid-row: 2 / 6; align-self: center; }
.harmonic-stack { position: absolute; inset: 20vh -10vw auto 16vw; height: 55vh; z-index: 3; transform: rotate(-7deg); }
.harmonic-stack span { position: absolute; left: 0; right: 0; height: 2px; background: var(--static-lavender); border-radius: 99px; box-shadow: 0 0 20px rgba(185,167,255,.45); opacity: .35; animation: harmonicWaver 5s ease-in-out infinite; }
.harmonic-stack span:nth-child(1) { top: 8%; background: var(--signal-cyan); }
.harmonic-stack span:nth-child(2) { top: 26%; animation-delay: -.7s; }
.harmonic-stack span:nth-child(3) { top: 44%; background: var(--tape-amber); animation-delay: -1.4s; }
.harmonic-stack span:nth-child(4) { top: 62%; animation-delay: -2.1s; }
.harmonic-stack span:nth-child(5) { top: 80%; background: var(--signal-cyan); animation-delay: -2.8s; }
.phase-diagram { position: absolute; right: 10vw; top: 19vh; width: min(36vw, 420px); aspect-ratio: 1; border: 1px solid rgba(53,246,232,.22); border-radius: 50%; animation: spin 18s linear infinite; }
.phase-diagram span { position: absolute; inset: 12%; border: 1px dashed rgba(185,167,255,.4); border-radius: 50%; transform: rotate(var(--r)); }
.phase-diagram span:nth-child(1) { --r: 18deg; }
.phase-diagram span:nth-child(2) { --r: 62deg; inset: 24%; border-color: rgba(255,184,77,.42); }
.phase-diagram span:nth-child(3) { --r: 103deg; inset: 36%; border-color: rgba(53,246,232,.55); }
.oversized-word { position: absolute; right: -3vw; bottom: 2vh; font-family: var(--fraunces); font-size: 19vw; color: rgba(245,241,232,.045); letter-spacing: -.08em; }
.phase-note { position: absolute; right: 18vw; bottom: 22vh; color: rgba(185,167,255,.78); }

.bloom { background: radial-gradient(circle at 38% 50%, rgba(255, 75, 92, .08), transparent 28%), rgba(8,44,70,.13); }
.bloom-copy { grid-column: 6 / 12; grid-row: 3 / 7; align-self: center; }
.particle-field { position: absolute; inset: 0; z-index: 3; overflow: hidden; }
.particle-field i { position: absolute; width: 3px; height: 3px; border-radius: 50%; background: var(--foam-white); opacity: .42; box-shadow: 0 0 10px currentColor; animation: particleBloom var(--dur) ease-in-out infinite; left: var(--x); top: var(--y); color: var(--c); }
.static-subtitles { position: absolute; left: 6vw; top: 20vh; display: grid; gap: 18px; font-family: var(--plex); color: rgba(245,241,232,.5); letter-spacing: .2em; text-transform: uppercase; }
.static-subtitles span { animation: subtitleBreak 2.8s steps(3) infinite; }
.static-subtitles span:nth-child(2) { color: var(--signal-cyan); animation-delay: -.5s; }
.static-subtitles span:nth-child(4) { color: var(--needle-red); animation-delay: -1.1s; }
.clipping-meter { position: absolute; left: 16vw; bottom: 20vh; display: flex; align-items: end; gap: 9px; height: 160px; }
.clipping-meter i { width: 8px; height: var(--h); background: var(--needle-red); box-shadow: 0 0 18px rgba(255,75,92,.65); animation: clip 1.4s ease-in-out infinite; }
.clipping-meter i:nth-child(1) { --h: 28%; }
.clipping-meter i:nth-child(2) { --h: 48%; animation-delay: -.2s; background: var(--tape-amber); }
.clipping-meter i:nth-child(3) { --h: 88%; animation-delay: -.4s; }
.clipping-meter i:nth-child(4) { --h: 58%; animation-delay: -.6s; background: var(--signal-cyan); }
.clipping-meter i:nth-child(5) { --h: 36%; animation-delay: -.8s; }

.shore { background: radial-gradient(circle at 50% 53%, rgba(53, 246, 232, .14), transparent 34%), linear-gradient(180deg, rgba(8,44,70,.2), var(--deep-booth-black)); }
.shore-copy { grid-column: 2 / 7; grid-row: 3 / 7; align-self: center; }
.listening-well { position: absolute; right: 8vw; top: 18vh; width: min(52vw, 620px); aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, rgba(53,246,232,.18), rgba(8,44,70,.55) 35%, transparent 68%); }
.ring { position: absolute; border-radius: 50%; border: 1px solid rgba(53,246,232,.34); inset: var(--inset); animation: wellPulse 4.8s ease-in-out infinite; }
.ring-1 { --inset: 6%; }
.ring-2 { --inset: 20%; border-color: rgba(185,167,255,.35); animation-delay: -.9s; }
.ring-3 { --inset: 34%; border-color: rgba(255,184,77,.36); animation-delay: -1.8s; }
.well-core { position: absolute; inset: 43%; display: grid; place-items: center; border-radius: 50%; background: var(--deep-booth-black); color: var(--signal-cyan); font-family: var(--plex); box-shadow: 0 0 45px rgba(53,246,232,.4); }
.shore-label { position: absolute; right: 7vw; bottom: 12vh; color: rgba(245,241,232,.54); }
.final-tuning { position: absolute; left: 8vw; bottom: 10vh; color: var(--tape-amber); }

.movement-nav { position: fixed; right: 18px; top: 50%; transform: translateY(-50%); z-index: 13; display: grid; gap: 10px; }
.movement-nav button { color: rgba(245,241,232,.52); background: rgba(5,7,13,.42); border: 1px solid rgba(245,241,232,.12); border-radius: 999px; padding: 9px 13px; font-family: var(--plex); font-size: 10px; letter-spacing: .1em; text-transform: uppercase; cursor: pointer; transition: color .3s, border-color .3s, box-shadow .3s; }
.movement-nav button.active { color: var(--signal-cyan); border-color: rgba(53,246,232,.55); box-shadow: 0 0 18px rgba(53,246,232,.18); }

@keyframes grainDrift { 50% { transform: translate3d(-3%, 2%, 0); } }
@keyframes fogSway { 50% { transform: translateX(16vw) translateY(-4vh) scale(1.2); } }
@keyframes threadFlow { to { stroke-dashoffset: -260; } }
@keyframes carrierTremble { 50% { transform: translateY(5px); } }
@keyframes decodeIn { to { opacity: 1; filter: blur(0); } }
@keyframes carrierPulse { 50% { opacity: .68; transform: scaleX(.96); } }
@keyframes drawWave { from { stroke-dashoffset: 900; } to { stroke-dashoffset: 0; } }
@keyframes harmonicWaver { 50% { transform: translateY(24px) scaleX(.94); opacity: .7; } }
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes particleBloom { 0%, 100% { transform: translate(0,0) scale(.5); opacity: .08; } 45% { transform: translate(var(--dx), var(--dy)) scale(1.8); opacity: .82; } }
@keyframes subtitleBreak { 50% { transform: translateX(9px); filter: blur(1px); opacity: .32; } }
@keyframes clip { 50% { transform: scaleY(.48); opacity: .7; } }
@keyframes wellPulse { 50% { transform: scale(1.08); opacity: .42; } }

@media (max-width: 760px) {
    .movement { padding: 76px 22px; display: block; }
    .movement-copy { max-width: none; margin-top: 25vh; }
    h1 { font-size: 22vw; }
    h2 { font-size: 17vw; }
    .frequency-hud { display: none; }
    .movement-nav { right: 8px; }
    .movement-nav button { padding: 8px; font-size: 8px; }
    .hum-copy, .drift-copy, .bloom-copy, .shore-copy { margin-left: 0; }
    .phase-diagram, .listening-well { opacity: .5; right: -18vw; width: 86vw; }
}