/* ============================================================
     marcvs.art v3 — MAINFRAME
     early computer graphics. monocromático: branco e cinzas
     sobre preto, fósforo verde só onde o sistema fala.
     estratos viram um filesystem.
     ============================================================ */
  :root {
    --black:  #060707;
    --white:  #f4f4f0;   /* fósforo branco P4 */
    --g1:     #c9c9c2;
    --g2:     #8e8e88;
    --g3:     #55554f;
    --g4:     #2c2c28;
    --green:  #5ac8fa;   /* azul fantasma — só o sistema usa */

    --pixel: "VT323", monospace;
    --plex:  "IBM Plex Mono", ui-monospace, monospace;
    --mono:  "JetBrains Mono", ui-monospace, monospace;
  }

  * { box-sizing: border-box; }

  html, body {
    margin: 0; padding: 0;
    background: var(--black);
    color: var(--g1);
    font-family: var(--mono);
    font-size: 16px;
    overflow-x: hidden;
  }

  ::selection { background: var(--white); color: var(--black); }

  /* scanlines discretas + leve vinheta de tubo */
  body::before {
    content: "";
    position: fixed; inset: 0;
    pointer-events: none; z-index: 50;
    background: repeating-linear-gradient(to bottom,
      rgba(0,0,0,0.18) 0, rgba(0,0,0,0.18) 1px,
      transparent 1px, transparent 3px);
  }
  body::after {
    content: "";
    position: fixed; inset: 0;
    pointer-events: none; z-index: 51;
    background: radial-gradient(ellipse at center,
      transparent 60%, rgba(0,0,0,0.5) 100%);
  }

  /* ---- presença fragmentada: pixels de uma pintura autoral ---- */
  #basilisk-field {
    position: fixed; inset: 0;
    width: 100%; height: 100%;
    z-index: 0; pointer-events: none;
    opacity: .8; transition: opacity 1.4s ease;
    image-rendering: pixelated;
  }
  html.film-is-open #basilisk-field { opacity: .2; }

  /* ---- boot: terminal digitando ------------------------------ */
  .boot {
    position: fixed; inset: 0; z-index: 100;
    background: var(--black);
    padding: 40px 64px;
    font-family: var(--pixel);
    font-size: 19px;
    color: var(--green);
    line-height: 1.5;
    white-space: pre-wrap;
  }
  .boot.done { animation: bootout 200ms forwards; }
  @keyframes bootout { to { opacity: 0; visibility: hidden; } }

  .stage { opacity: 0; }
  .stage.on { animation: tube-on 360ms steps(4) forwards; }
  @keyframes tube-on {
    0% { opacity: 0; filter: brightness(2.4); }
    100% { opacity: 1; filter: none; }
  }

  /* ---- shell -------------------------------------------------- */
  .shell {
    position: relative; z-index: 2;
    max-width: 1240px;
    margin: 0 auto;
    padding: 36px 64px 56px;
  }

  /* ---- topbar -------------------------------------------------- */
  .topbar {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 24px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--g3);
  }
  .topbar .sys { color: var(--green); }
  .topbar .sys .blink { animation: blink 1.1s steps(1) infinite; }
  @keyframes blink { 50% { opacity: 0; } }
  .coords { text-align: right; line-height: 1.9; text-transform: lowercase; }

  /* ---- mark: discreto, saída de terminal ----------------------- */
  .mark { margin-top: 72px; }
  .mark .cmdline {
    font-family: var(--plex);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--g3);
    text-transform: lowercase;
    margin-bottom: 14px;
  }
  .mark .cmdline .prompt { color: var(--green); }
  .mark h1 {
    margin: 0;
    font-family: "Workbench", var(--pixel);
    font-weight: 400;
    font-size: clamp(38px, 5vw, 60px);
    letter-spacing: 0.18em;
    text-transform: lowercase;
    color: var(--white);
    line-height: 1;
    cursor: crosshair;
    width: max-content; max-width: 100%;
  }
  .mark .tag {
    margin-top: 18px;
    font-family: var(--plex);
    font-weight: 500;
    font-size: 13px;
    letter-spacing: 0.1em;
    color: var(--g2);
    line-height: 2;
    text-transform: lowercase;
  }
  .mark .tag em { font-style: normal; color: var(--white); }
  .mark .tag .cursor {
    display: inline-block; width: 9px; height: 15px;
    background: var(--green);
    vertical-align: -2px;
    animation: blink 1s steps(1) infinite;
  }

  /* ---- paintings: círculos flutuantes ---------------------------- */
  .paintings {
    position: relative;
    margin-top: 56px;
    min-height: 40vh;
  }
  .paintings .cmdline {
    font-family: var(--plex);
    font-size: 12px;
    letter-spacing: 0.08em;
    color: var(--g3);
    text-transform: lowercase;
    margin-bottom: 18px;
  }
  .paintings .cmdline .prompt { color: var(--green); }
  .pfield { position: relative; }

  .orb {
    position: absolute;
    border-radius: 50%;
    background-size: cover;
    background-position: center;
    cursor: crosshair;
    border: 1px solid var(--g4);
    filter: grayscale(0.85) contrast(1.05);
    transition: filter .3s, border-color .3s, transform .3s;
    animation: bob var(--dur, 9s) ease-in-out var(--delay, 0s) infinite alternate;
  }
  .orb:hover {
    filter: none;
    border-color: var(--g2);
    z-index: 5;
  }
  @keyframes bob {
    from { transform: translateY(0); }
    to   { transform: translateY(var(--drift, -18px)); }
  }

  .pfield .empty {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--g3);
    opacity: .5;
    animation: blink 2.6s steps(2) infinite;
  }

  /* ---- viewer fullscreen ------------------------------------------ */
  .viewer {
    position: fixed; inset: 0; z-index: 90;
    background: rgba(6,7,7,0.96);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px 32px;
    cursor: crosshair;
  }
  .viewer.on { display: flex; }
  .viewer img {
    max-width: 92vw;
    max-height: 78vh;
    border: 1px solid var(--g4);
  }
  .viewer .cap {
    margin-top: 20px;
    font-family: var(--plex);
    font-weight: 300;
    font-size: 13px;
    letter-spacing: 0.06em;
    color: var(--g1);
    text-align: center;
    max-width: 70ch;
    text-transform: lowercase;
  }
  .viewer .cap::before { content: "> "; color: var(--green); }
  .viewer .close {
    position: absolute; top: 22px; right: 32px;
    font-family: var(--pixel);
    font-size: 24px;
    color: var(--g2);
    background: none; border: none; cursor: crosshair;
  }
  .viewer .close:hover { background: var(--white); color: var(--black); }

  /* ---- filesystem (ex-estratos) ----------------------------------- */
  .fs {
    position: relative;
    padding: 40px 0 8vh;
    min-height: 0;
  }
  .node-wrap { position: relative; transition: margin-left 600ms cubic-bezier(.4,0,.2,1); }
  .node-wrap + .node-wrap { margin-top: var(--gap, 28px); }

  .node {
    position: relative;
    display: block;
    width: max-content;
    max-width: 92%;
    text-decoration: none;
    cursor: crosshair;
  }
  .node .path {
    display: block;
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.12em;
    color: var(--g3);
    margin-bottom: 6px;
    text-transform: lowercase;
  }
  .node .label {
    display: inline-block;
    font-family: "Workbench", var(--pixel);
    line-height: 0.82;
    letter-spacing: 0.005em;
    text-transform: lowercase;
    position: relative;
    padding: 2px 8px 4px 0;
  }
  .node .desc {
    display: block;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.05em;
    color: var(--g2);
    margin-top: 8px;
    max-width: 400px;
    opacity: 0;
    transform: translateY(-3px);
    transition: opacity .25s, transform .25s;
  }
  .node:hover .desc { opacity: 1; transform: none; }
  .node:hover .desc::before { content: "> "; color: var(--green); }

  /* hover: vídeo invertido, como seleção de terminal */
  .node:hover .label {
    background: var(--white);
    color: var(--black) !important;
    box-shadow: 8px 8px 0 var(--g4);
  }

  /* hierarquia em cinzas — luminância é profundidade */
  .node.prime { color: var(--white); }
  .node.prime .label { font-variation-settings: 'BLED' 0, 'SCAN' 0; }
  .node.l1 .label { font-variation-settings: 'BLED' 0, 'SCAN' 38; }
  .node.l2 .label { font-variation-settings: 'BLED' 42, 'SCAN' 0; }
  .node.l3 .label { font-variation-settings: 'BLED' 28, 'SCAN' -28; }
  .node.prime .label { font-size: clamp(34px, 4.6vw, 64px); }
  .node.prime .path { color: var(--g2); }

  .node.l1 { color: var(--g1); }
  .node.l1 .label { font-size: clamp(26px, 3.4vw, 44px); }
  .node.l2 { color: var(--g2); }
  .node.l2 .label { font-size: clamp(23px, 3vw, 38px); }
  .node.l3 { color: var(--g3); }
  .node.l3 .label { font-size: clamp(21px, 2.7vw, 33px); }

  /* nó sem sinal */
  .node.void { color: var(--g3); pointer-events: none; }
  .node.void .label {
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.45em;
    text-transform: uppercase;
    opacity: 0.5;
    animation: blink 2.6s steps(2) infinite;
  }

  /* glitch monocromático agressivo: fatias rasgando */
  .glitching .label { animation: slice 320ms steps(6, end); }
  .glitching-h1 { animation: slice 320ms steps(6, end); }
  @keyframes slice {
    0%   { transform: none; clip-path: none; opacity: 1; }
    12%  { transform: translateX(-14px) skewX(-5deg); clip-path: inset(5% 0 68% 0); }
    26%  { transform: translateX(11px) translateY(3px); clip-path: inset(42% 0 28% 0); opacity: .7; }
    40%  { transform: translateX(-9px) scaleX(1.04); clip-path: inset(74% 0 2% 0); }
    55%  { transform: translateX(16px) skewX(4deg); clip-path: inset(18% 0 56% 0); opacity: .85; }
    70%  { transform: translateX(-12px) translateY(-3px); clip-path: inset(60% 0 12% 0); }
    85%  { transform: translateX(6px); clip-path: inset(30% 0 40% 0); opacity: .6; }
    100% { transform: none; clip-path: none; opacity: 1; }
  }

  /* ---- foot ---------------------------------------------------------- */
  .foot {
    margin-top: 48px;
    padding-top: 18px;
    border-top: 1px solid var(--g4);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 12px 28px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    color: var(--g3);
    text-transform: lowercase;
  }
  .foot nav { display: flex; flex-wrap: wrap; gap: 6px 24px; }
  .foot a { color: var(--g2); text-decoration: none; }
  .foot a:hover { background: var(--white); color: var(--black); }

  /* ---- mobile --------------------------------------------------------- */
  @media (max-width: 720px) {
    .shell { padding: 22px 20px 44px; }
    .topbar { flex-direction: column; gap: 8px; }
    .coords { text-align: left; }
    .mark { margin-top: 40px; }
    .boot { padding: 24px 20px; font-size: 16px; }
    .fs { padding: 40px 0 8vh; }
    .node-wrap + .node-wrap { margin-top: 24px; }
    .node { max-width: 100%; }
    .node .desc { opacity: 1; transform: none; }
    .node .desc::before { content: "> "; color: var(--green); }
  }

  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
    .boot { display: none; }
    .stage { opacity: 1; }
  }