/* =========================================================
     SPLIT — full-viewport, dos columnas reactivas al hover
     · default:        50 / 50
     · hover izq:      75 / 25
     · hover dch:      25 / 75
     · cada columna scrollea independientemente cuando .is-active
     ========================================================= */
  html, body{ height: 100%; overflow: hidden; }
  body{ margin: 0; }

  .split{
    position: fixed;
    inset: 0;
    display: flex;
    overflow: hidden;
    background: var(--paper);
    z-index: 1;
  }

  .split-col{
    position: relative;
    flex: 1 1 50%;
    min-width: 0;
    overflow: hidden;                        /* sin scroll por defecto */
    transition: flex-basis .55s cubic-bezier(.22,1,.36,1);
    cursor: crosshair;
  }
  .split-col[data-side="left"]{
    background: var(--paper);
    color: var(--ink);
    border-right: 1px solid var(--rule);
  }
  .split-col[data-side="right"]{
    background: var(--ink);
    color: var(--paper);
  }

  /* hover state — JS sets [data-active] on .split */
  .split[data-active="left"]  .split-col[data-side="left"] { flex-basis: 75%; }
  .split[data-active="left"]  .split-col[data-side="right"]{ flex-basis: 25%; }
  .split[data-active="right"] .split-col[data-side="left"] { flex-basis: 25%; }
  .split[data-active="right"] .split-col[data-side="right"]{ flex-basis: 75%; }

  /* la activa habilita scroll vertical interno */
  .split-col.is-active{ overflow-y: auto; overflow-x: hidden; }
  .split-col.is-active::-webkit-scrollbar{ width: 4px; }
  .split-col.is-active::-webkit-scrollbar-thumb{ background: var(--rule); }
  .split-col[data-side="right"].is-active::-webkit-scrollbar-thumb{ background: rgba(239,236,228,.2); }

  /* La inactiva se desatura ligeramente para reforzar focus */
  .split-col{ transition: flex-basis .55s cubic-bezier(.22,1,.36,1), filter .55s ease, opacity .55s ease; }
  .split[data-active="left"]  .split-col[data-side="right"]{ filter: saturate(.85); opacity: .82; }
  .split[data-active="right"] .split-col[data-side="left"] { filter: saturate(.85); opacity: .82; }

  /* ---------- inner content ---------- */
  .col-inner{
    padding: clamp(40px, 6vw, 88px) clamp(24px, 4vw, 56px) 120px;
    min-height: 100%;
    position: relative;
  }

  /* TOP STRIP de cada columna — sticky con eyebrow + nº + reloj */
  .col-strip{
    position: sticky;
    top: 0;
    background: inherit;
    padding: 18px 0 14px;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--mute);
    border-bottom: 1px solid var(--rule);
    margin-bottom: clamp(40px, 6vw, 80px);
    z-index: 2;
  }
  .split-col[data-side="right"] .col-strip{
    color: rgba(239,236,228,.5);
    border-bottom-color: rgba(239,236,228,.15);
    background: var(--ink);
  }
  .col-strip .col-n{ color: var(--accent); }
  .col-strip .col-pulse{
    display:inline-block; width:6px; height:6px; background: var(--accent); border-radius:50%;
    margin-right:6px; transform: translateY(-1px);
    animation: pulse 2.4s ease-in-out infinite;
  }

  /* Headlines de columna */
  .col-eyebrow{
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--mute);
    margin: 0 0 18px;
  }
  .split-col[data-side="right"] .col-eyebrow{ color: rgba(239,236,228,.45); }

  .col-title{
    font-family: var(--display);
    font-size: clamp(40px, 5.4vw, 84px);
    line-height: 1.0;
    letter-spacing: -.018em;
    font-weight: 400;
    margin: 0 0 clamp(28px, 4vw, 48px);
    color: inherit;
    transition: font-size .5s ease;
  }
  .col-title em{
    font-family: var(--body);
    font-style: italic;
    color: var(--accent);
    font-size: .82em;
    letter-spacing: 0;
  }
  .col-title .soft{
    color: var(--mute);
  }
  .split-col[data-side="right"] .col-title .soft{
    color: rgba(239,236,228,.55);
  }

  /* Cuando una columna está colapsada (25%), achicamos su título */
  .split[data-active="right"] .split-col[data-side="left"]  .col-title,
  .split[data-active="left"]  .split-col[data-side="right"] .col-title{
    font-size: clamp(22px, 2.2vw, 30px);
  }

  /* ---------- LEFT column — Manifesto/About ---------- */
  .col-body{
    font-family: var(--body);
    font-size: clamp(15px, 1.4vw, 18px);
    line-height: 1.6;
    color: var(--mute);
    max-width: 52ch;
    margin: 0 0 1.4em;
  }
  .split-col[data-side="left"] .col-body{ color: #4a463e; }
  .split-col[data-side="right"] .col-body{ color: rgba(239,236,228,.65); }
  .col-body em{ color: var(--accent); font-style: italic; }
  .col-body .ink{ color: var(--ink); }
  .split-col[data-side="right"] .col-body .ink{ color: var(--paper); }

  /* index list */
  .split-list{
    margin-top: clamp(40px, 6vw, 64px);
    border-top: 1px solid var(--rule);
  }
  .split-col[data-side="right"] .split-list{ border-top-color: rgba(239,236,228,.15); }

  .split-list-item{
    display: grid;
    grid-template-columns: 40px 1fr auto;
    gap: 18px;
    align-items: baseline;
    padding: 22px 0;
    border-bottom: 1px solid var(--rule);
    transition: padding-left .35s ease, color .25s ease;
    cursor: crosshair;
    color: inherit;
  }
  .split-col[data-side="right"] .split-list-item{ border-bottom-color: rgba(239,236,228,.15); }

  .split-list-item:hover{ padding-left: 12px; }
  .split-list-item:hover .sli-name{ color: var(--accent); }

  .sli-n{
    font-family: var(--mono);
    font-size: 11px;
    color: var(--mute);
    letter-spacing: .04em;
  }
  .split-col[data-side="right"] .sli-n{ color: rgba(239,236,228,.4); }

  .sli-name{
    font-family: var(--display);
    font-size: clamp(22px, 2.4vw, 30px);
    letter-spacing: -.012em;
    line-height: 1.1;
    font-weight: 400;
    transition: color .25s ease;
  }
  .sli-name em{
    font-family: var(--body);
    font-style: italic;
    color: var(--mute);
    font-size: .55em;
    margin-left: .4em;
  }
  .split-col[data-side="right"] .sli-name em{ color: rgba(239,236,228,.5); }

  .sli-meta{
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .07em;
    text-transform: uppercase;
    color: var(--mute);
    white-space: nowrap;
  }
  .split-col[data-side="right"] .sli-meta{ color: rgba(239,236,228,.45); }

  /* Pullquote inside column */
  .col-pull{
    margin: clamp(56px, 8vw, 96px) 0;
    padding-left: clamp(20px, 3vw, 40px);
    border-left: 2px solid var(--accent);
    font-family: var(--display);
    font-size: clamp(28px, 3.4vw, 44px);
    line-height: 1.05;
    letter-spacing: -.012em;
    color: inherit;
  }
  .col-pull em{
    font-family: var(--body);
    font-style: italic;
    color: var(--accent);
    font-size: .8em;
  }

  /* Image plate placeholder */
  .col-plate{
    width: 100%;
    aspect-ratio: 4/3;
    margin: clamp(36px, 5vw, 56px) 0;
    background: var(--ph, #c9b7a0);
    outline: 1px solid rgba(0,0,0,.08);
    position: relative;
    overflow: hidden;
  }
  .split-col[data-side="right"] .col-plate{ outline-color: rgba(239,236,228,.12); }
  .col-plate::after{
    content: attr(data-cap);
    position: absolute;
    left: 12px; bottom: 10px;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--paper);
    background: rgba(26,24,20,.6);
    padding: 4px 8px;
  }

  /* Caption / footer of column */
  .col-foot{
    margin-top: clamp(60px, 8vw, 100px);
    padding-top: 24px;
    border-top: 1px solid var(--rule);
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--mute);
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
  }
  .split-col[data-side="right"] .col-foot{
    border-top-color: rgba(239,236,228,.15);
    color: rgba(239,236,228,.45);
  }

  /* ---------- HINT (centro) ---------- */
  .split-hint{
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 50;
    font-family: var(--mono);
    font-size: 10px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--mute);
    padding: 8px 14px;
    background: var(--paper);
    border: 1px solid var(--rule);
    pointer-events: none;
    transition: opacity .4s ease, transform .4s ease;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .split[data-active] ~ .split-hint{ opacity: 0; transform: translate(-50%, 12px); }
  .split-hint .arrow{ color: var(--accent); }

  /* divider visual entre columnas (overlay sobre el border) */
  .split-divider{
    position: absolute;
    top: 0; bottom: 0;
    width: 1px;
    background: transparent;
    z-index: 5;
    pointer-events: none;
    transition: left .55s cubic-bezier(.22,1,.36,1), background .55s ease;
  }
  .split[data-active="left"]  .split-divider{ background: transparent; }
  .split[data-active="right"] .split-divider{ background: transparent; }

  /* mini header floating con marca + back link */
  .split-mark{
    position: fixed;
    top: 18px;
    left: 24px;
    z-index: 100;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: var(--display);
    font-size: 18px;
    letter-spacing: -.005em;
    color: var(--ink);
    mix-blend-mode: difference;
    color: var(--paper);
  }
  .split-mark .mlogo{
    width: 22px; height: 22px;
    background: var(--paper);
    position: relative;
  }
  .split-mark .mlogo::after{
    content: ""; position: absolute; inset: 5px; background: var(--accent);
  }
  .split-mark .dot{
    width:5px; height:5px; background: var(--accent); border-radius:50%;
    display:inline-block; transform: translateY(-3px);
    margin: 0 .25em;
  }

  .split-back{
    position: fixed;
    top: 22px;
    right: 24px;
    z-index: 100;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--paper);
    mix-blend-mode: difference;
    transition: color .25s ease;
  }
  .split-back:hover{ color: var(--accent); }

  /* ---------- responsive: en móvil pasamos a apilado ---------- */
  @media (max-width: 800px){
    html, body{ height: auto; overflow: auto; }
    .split{
      position: relative;
      flex-direction: column;
      height: auto;
    }
    .split-col, .split[data-active] .split-col{
      flex-basis: auto !important;
      width: 100%;
      overflow: visible !important;
      filter: none !important;
      opacity: 1 !important;
    }
    .split-col[data-side="left"]{ border-right: 0; border-bottom: 1px solid var(--rule); }
    .split-divider{ display: none; }
    .split-hint{ display: none; }
    .col-inner{ padding-bottom: 80px; min-height: auto; }
  }