:root {
  --ink: #e8f1ef;
  --dim: rgba(232, 241, 239, .62);
  --faint: rgba(232, 241, 239, .28);
  --glow: #7ff0c8;
  --glow-2: #8fb8ff;
  --abyss: #02070b;
  --sans: "Geist", system-ui, sans-serif;
  --mono: "Geist Mono", ui-monospace, monospace;
  --serif: "Instrument Serif", Georgia, serif;
  --gutter: clamp(18px, 3.4vw, 56px);
}
* { box-sizing: border-box; }
html { background: var(--abyss); }
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
body { margin: 0; color: var(--ink); font: 400 16px/1.55 var(--sans); background: var(--abyss); overflow-x: clip; -webkit-font-smoothing: antialiased; }
em { font-family: var(--serif); font-style: italic; font-weight: 400; }
a { color: inherit; }
.skip:not(:focus) { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.skip:focus { position: fixed; z-index: 99; top: 10px; left: 10px; background: var(--ink); color: var(--abyss); padding: 8px 12px; }
:focus-visible { outline: 2px solid var(--glow); outline-offset: 3px; }

/* ---------- barra superior ---------- */
.top { position: fixed; z-index: 30; top: 0; left: 0; right: 0; display: flex; align-items: center; gap: 18px; padding: 18px var(--gutter); pointer-events: none; }
.top > * { pointer-events: auto; }
.logo { display: flex; align-items: center; gap: 10px; text-decoration: none; font: 500 14px/1 var(--mono); letter-spacing: .3em; }
.logo svg { width: 22px; fill: none; stroke: var(--glow); stroke-width: 1.6; }
.top-sub { margin: 0; font: 400 11px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--dim); }
.sound { margin-left: auto; display: flex; align-items: center; gap: 10px; background: rgba(2, 7, 11, .35); border: 1px solid var(--faint); color: var(--ink); border-radius: 99px; padding: 8px 14px; font: 400 11px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; cursor: pointer; backdrop-filter: blur(8px); }
.sound-bars { display: flex; gap: 2px; align-items: end; height: 12px; }
.sound-bars i { width: 2px; height: 3px; background: var(--glow); transition: height .3s; }
.sound[aria-pressed="true"] .sound-bars i { animation: bars 1.1s ease-in-out infinite; }
.sound[aria-pressed="true"] .sound-bars i:nth-child(2) { animation-delay: -.4s; }
.sound[aria-pressed="true"] .sound-bars i:nth-child(3) { animation-delay: -.8s; }
@keyframes bars { 50% { height: 12px; } }

/* ---------- profundímetro ---------- */
.gauge { transition: opacity .6s; position: fixed; z-index: 25; left: var(--gutter); top: 50%; transform: translateY(-50%); display: grid; grid-template-columns: auto auto; gap: 18px; align-items: center; pointer-events: none; }
.gauge-read { display: grid; gap: 14px; }
.g-depth { margin: 0; font: 300 clamp(40px, 4.4vw, 68px)/.9 var(--sans); font-variant-numeric: tabular-nums; letter-spacing: -.02em; min-width: 3.2em; }
.g-depth small { font: 400 13px/1 var(--mono); margin-left: 6px; color: var(--dim); letter-spacing: .1em; }
.g-data { margin: 0; display: grid; gap: 5px; font: 400 11px/1.2 var(--mono); }
.g-data div { display: flex; gap: 10px; }
.g-data dt { width: 56px; color: var(--dim); text-transform: uppercase; letter-spacing: .1em; }
.g-data dd { margin: 0; font-variant-numeric: tabular-nums; }
.g-scale { position: relative; height: 46vh; width: 90px; }
.g-track { position: absolute; left: 0; top: 0; bottom: 0; width: 1px; background: linear-gradient(var(--glow-2), var(--faint) 20%, var(--faint)); }
.g-mark { position: absolute; left: -5px; top: 0; width: 11px; height: 11px; border-radius: 50%; border: 1px solid var(--glow); background: var(--abyss); box-shadow: 0 0 14px var(--glow); transform: translateY(-50%); }
.g-zones { list-style: none; margin: 0; padding: 0; }
.g-zones li { position: absolute; left: 12px; top: calc(var(--at) * 100%); transform: translateY(-50%); font: 400 9px/1 var(--mono); letter-spacing: .12em; text-transform: uppercase; color: var(--faint); white-space: nowrap; }
.g-zones li::before { content: ""; position: absolute; left: -12px; top: 50%; width: 6px; height: 1px; background: var(--faint); }
.g-zone { grid-column: 1 / -1; margin: 0; font: 400 11px/1 var(--mono); letter-spacing: .18em; text-transform: uppercase; color: var(--glow); }

/* ---------- la columna ---------- */
.columna { position: relative; height: 1500vh; }
.stage { position: sticky; top: 0; height: 100vh; overflow: hidden; }
.water { position: absolute; inset: 0; background: #0b4f7a; }
.layer { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; }
video.layer, img.layer, .layer > video, .layer > img { object-fit: cover; }
.surface { will-change: transform, opacity; }
.twilight { opacity: 0; mix-blend-mode: screen; will-change: transform, opacity; }
.lens { opacity: 0; filter: url(#lente); -webkit-mask-image: linear-gradient(transparent, #000 40%, #000 60%, transparent); mask-image: linear-gradient(transparent, #000 40%, #000 60%, transparent); -webkit-mask-size: 100% 34%; mask-size: 100% 34%; -webkit-mask-repeat: no-repeat; mask-repeat: no-repeat; }
.lens img { width: 100%; height: 100%; object-fit: cover; transform: scale(1.04); mix-blend-mode: screen; }
.snow { mix-blend-mode: screen; }
/* la haloclina: una frontera de luz ondulante que cruza la pantalla */
.halo { opacity: 0; }
.halo i { position: absolute; left: -10%; right: -10%; height: 26vh; top: 0; transform: translateY(-50%); background: linear-gradient(transparent, rgba(120, 210, 255, .07) 30%, rgba(170, 235, 255, .28) 50%, rgba(120, 210, 255, .07) 70%, transparent); filter: url(#lente); mix-blend-mode: screen; }
.lens img { filter: brightness(2.2) contrast(1.1); }
.dark { opacity: 0; }
.organisms { position: absolute; inset: 0; }
.organisms img { position: absolute; width: min(56vw, 900px); aspect-ratio: 16 / 9; object-fit: cover; mix-blend-mode: screen; will-change: transform; }
.organisms.glow { opacity: .16; filter: blur(2px) saturate(1.4); }
.organisms.lit { -webkit-mask-image: radial-gradient(circle var(--r, 240px) at var(--fx, 50%) var(--fy, 50%), #000 0%, rgba(0, 0, 0, .75) 45%, transparent 100%); mask-image: radial-gradient(circle var(--r, 240px) at var(--fx, 50%) var(--fy, 50%), #000 0%, rgba(0, 0, 0, .75) 45%, transparent 100%); }
.torch { position: absolute; inset: 0; pointer-events: none; opacity: 0; background: radial-gradient(circle calc(var(--r, 240px) * 1.3) at var(--fx, 50%) var(--fy, 50%), rgba(170, 220, 255, .07), transparent 70%); mix-blend-mode: screen; }
.veil { opacity: 0; }
.veil video { width: 100%; height: 100%; mix-blend-mode: screen; }
.veil-pulse { position: absolute; inset: 0; mix-blend-mode: screen; }
.veil-pulse i { position: absolute; top: 8%; bottom: 8%; width: 16vw; margin-left: -8vw; border-radius: 50%; background: radial-gradient(closest-side, rgba(170, 255, 225, .55), rgba(140, 120, 255, .18) 55%, transparent); opacity: 0; filter: blur(8px); }
.floor { opacity: 0; will-change: transform, opacity; }
.floor video { width: 100%; height: 100%; }
.floor canvas { position: absolute; inset: 0; width: 100%; height: 100%; mix-blend-mode: screen; }
.floor.armed { pointer-events: auto; cursor: crosshair; }
.vignette { position: absolute; inset: 0; pointer-events: none; background: radial-gradient(120% 90% at 55% 45%, transparent 45%, rgba(2, 7, 11, .75) 100%); }

/* ---------- relato ---------- */
.story { position: absolute; inset: 0; pointer-events: none; }
.beat { position: absolute; opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .9s cubic-bezier(.2, .8, .2, 1); }
.beat.on { opacity: 1; transform: none; }
.beat.on .veil-ctrl, .beat.on .btn { pointer-events: auto; }
.hero { left: 50%; top: 50%; width: min(980px, 86vw); transform: translate(-50%, calc(-50% + 24px)); text-align: center; }
.hero.on { transform: translate(-50%, -50%); }
.kicker { font: 400 11px/1 var(--mono); letter-spacing: .28em; text-transform: uppercase; color: var(--dim); margin: 0 0 22px; }
h1 { font: 300 clamp(52px, 8.4vw, 136px)/.92 var(--sans); letter-spacing: -.035em; margin: 0 0 26px; text-shadow: 0 2px 40px rgba(0, 20, 40, .35); }
.lede { color: var(--dim); font-size: 17px; margin: 0 auto 40px; max-width: 520px; }
.hint { font: 400 11px/1 var(--mono); letter-spacing: .3em; text-transform: uppercase; display: flex; flex-direction: column; align-items: center; gap: 12px; margin: 0; }
.hint-line { width: 1px; height: 46px; background: linear-gradient(var(--ink), transparent); animation: drop 2.2s ease-in-out infinite; transform-origin: top; }
@keyframes drop { 0% { transform: scaleY(0); } 50% { transform: scaleY(1); } 100% { transform: scaleY(1); opacity: 0; } }
.zone-beat { left: 34vw; top: 30vh; max-width: 560px; }
.zone-n { font: 400 11px/1 var(--mono); letter-spacing: .2em; text-transform: uppercase; color: var(--glow); margin: 0 0 18px; }
h2 { font: 300 clamp(40px, 5.2vw, 88px)/.95 var(--sans); letter-spacing: -.03em; margin: 0 0 20px; }
.zone-beat p:not(.zone-n) { color: var(--dim); font-size: 17px; max-width: 420px; }
.torch-hint { font: 400 12px/1.5 var(--mono) !important; letter-spacing: .06em; color: var(--glow) !important; }
.card { width: min(360px, 80vw); padding: 22px 22px 20px; border: 1px solid rgba(127, 240, 200, .25); background: rgba(2, 10, 16, .45); backdrop-filter: blur(12px); border-radius: 4px; }
.card[data-side="r"] { right: calc(var(--gutter) + 20px); bottom: 14vh; }
.card[data-side="l"] { left: 34vw; bottom: 14vh; }
.card-k { font: 400 10px/1.4 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--glow); margin: 0 0 10px; }
.card h3 { font: 400 26px/1.05 var(--sans); letter-spacing: -.01em; margin: 0 0 10px; }
.card p { font-size: 14px; color: var(--dim); margin: 0 0 8px; }
.card-meta { font: 400 10px/1.5 var(--mono) !important; letter-spacing: .08em; color: var(--faint) !important; text-transform: uppercase; }
.quiet { left: 50%; top: 50%; transform: translate(-50%, calc(-50% + 24px)); text-align: center; width: min(700px, 86vw); }
.quiet.on { transform: translate(-50%, -50%); }
.quiet p { font: 300 clamp(26px, 2.8vw, 42px)/1.2 var(--sans); letter-spacing: -.01em; }
.veil-beat { right: calc(var(--gutter) + 10px); top: 16vh; width: min(420px, 84vw); text-shadow: 0 2px 24px rgba(0, 0, 0, .8); }
.veil-beat::before { content: ""; position: absolute; inset: -12vh -6vw -20vh -10vw; z-index: -1; background: radial-gradient(closest-side, rgba(2, 7, 11, .78), transparent); }
.veil-beat h2 { font-size: clamp(48px, 6vw, 100px); }
.veil-beat p { color: var(--dim); font-size: 15px; }
.veil-ctrl { display: grid; gap: 12px; margin: 22px 0 14px; padding: 16px; border: 1px solid rgba(127, 240, 200, .25); background: rgba(2, 10, 16, .5); backdrop-filter: blur(10px); border-radius: 4px; }
.veil-ctrl label { display: grid; grid-template-columns: 1fr auto; gap: 6px 10px; font: 400 11px/1 var(--mono); letter-spacing: .08em; text-transform: uppercase; color: var(--dim); }
.veil-ctrl input { grid-column: 1 / -1; accent-color: var(--glow); }
.btn { font: 500 12px/1 var(--mono); letter-spacing: .14em; text-transform: uppercase; color: var(--abyss); background: var(--glow); border: 0; border-radius: 99px; padding: 13px 18px; cursor: pointer; box-shadow: 0 0 30px rgba(127, 240, 200, .35); }
.btn:hover { box-shadow: 0 0 46px rgba(127, 240, 200, .6); }
.sonar-beat { top: 18vh; }

/* ---------- mapa ---------- */
.mapa { position: relative; padding: 18vh var(--gutter) 10vh calc(var(--gutter) + 230px); background: linear-gradient(#000, var(--abyss) 30%); }
.mapa-head h2 { font-size: clamp(56px, 7vw, 120px); }
.mapa-head p { color: var(--dim); max-width: 460px; }
.column-map { position: relative; margin: 8vh 0 12vh; height: 120vh; border-left: 1px solid var(--faint); background: linear-gradient(rgba(70, 160, 230, .18), rgba(30, 70, 140, .1) 15%, rgba(10, 20, 40, .05) 60%, transparent); }
.column-map .zone { position: absolute; left: 0; right: 0; border-top: 1px dashed rgba(232, 241, 239, .12); font: 400 10px/1 var(--mono); letter-spacing: .16em; text-transform: uppercase; color: var(--faint); padding: 8px 0 0 14px; }
.column-map .pt { position: absolute; display: flex; align-items: center; gap: 12px; transform: translateY(-50%); background: none; border: 0; color: var(--ink); cursor: pointer; padding: 6px 10px 6px 0; text-align: left; }
.column-map .pt::before { content: ""; width: 9px; height: 9px; border-radius: 50%; background: var(--glow); box-shadow: 0 0 14px var(--glow); flex: none; margin-left: -5px; }
.column-map .pt.exp::before { background: var(--glow-2); box-shadow: 0 0 14px var(--glow-2); border-radius: 1px; transform: rotate(45deg); }
.column-map .pt b { font: 400 18px/1.1 var(--sans); }
.column-map .pt small { font: 400 10px/1 var(--mono); letter-spacing: .12em; color: var(--dim); text-transform: uppercase; display: block; margin-top: 4px; }
.column-map .pt:hover b { color: var(--glow); }
.pie { border-top: 1px solid var(--faint); padding-top: 26px; color: var(--dim); font-size: 13px; max-width: 760px; }
.pie .small { font: 400 11px/1 var(--mono); letter-spacing: .1em; text-transform: uppercase; }

@media (max-width: 900px) {
  .gauge { top: auto; bottom: 18px; transform: none; grid-template-columns: auto; }
  .g-scale, .g-data { display: none; }
  .g-depth { font-size: 34px; }
  .top-sub { display: none; }
  [data-sound-label] { display: none; }
  .zone-beat, .card[data-side="l"] { left: var(--gutter); right: var(--gutter); }
  .zone-beat { top: 18vh; }
  .card[data-side] { left: var(--gutter); right: var(--gutter); width: auto; bottom: 20vh; }
  .veil-beat { left: var(--gutter); right: var(--gutter); width: auto; top: 12vh; }
  .organisms img { width: 110vw; }
  .mapa { padding-left: var(--gutter); }
}
@media (prefers-reduced-motion: reduce) {
  .beat { transition: opacity .3s; transform: none !important; }
  .hint-line, .sound-bars i { animation: none !important; }
}