:root {
  --bg: #000;
  --fg: #d8d8d8;
  --dim: #8a8a8a;
  --accent: #7fc4ff;
  --strong: #ffd479;
  --btn: #2e2e2e;
  --btn-hover: #444;
  --btn-fg: #b9b9b9;
  --doc-bg: #0c0c0c;
  --doc-border: #3a3a3a;
  --font: "Consolas", "Cascadia Mono", "DejaVu Sans Mono", "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font);
  font-size: var(--fs, 20px);
  line-height: 1.4;
  overflow: hidden;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100%;
  max-width: 1100px;
  margin: 0 auto;
}

/* ---- pantalla de inicio ------------------------------------------- */
#title {
  position: fixed;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 28px;
  background: var(--bg);
  z-index: 20;
  cursor: pointer;
}
#title pre {
  margin: 0;
  font-size: clamp(6px, 1.25vw, 13px);
  line-height: 1.05;
  color: #cfcfcf;
}
#title .press { color: var(--fg); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .35; } }

/* ---- terminal ----------------------------------------------------- */
#screen {
  flex: 1;
  overflow-y: auto;
  padding: 18px 20px 8px;
  white-space: pre-wrap;
  word-wrap: break-word;
  scrollbar-width: thin;
  scrollbar-color: #333 transparent;
}
#screen .user { color: var(--accent); }
#screen .strong, .doc-body .strong { color: var(--strong); }
#screen .sys { color: var(--dim); }
.cursor {
  display: inline-block;
  width: .6em;
  height: 1.05em;
  vertical-align: text-bottom;
  background: var(--fg);
  animation: blink 1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

#choices {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 10px 60px 18px;
  min-height: 12px;
}
#choices.two { grid-template-columns: 1fr 1fr; }
#choices button {
  font: inherit;
  font-size: .95em;
  color: var(--btn-fg);
  background: var(--btn);
  border: 0;
  padding: .45em .8em;
  cursor: pointer;
  text-align: center;
  white-space: normal;
}
#choices button:hover, #choices button:focus-visible { background: var(--btn-hover); color: #fff; outline: none; }
#choices button .n { color: #666; margin-right: .6em; }

/* ---- visor de documentos ----------------------------------------- */
#doc {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, .7);
  z-index: 10;
}
#doc.open { display: flex; }
.doc-win {
  width: min(880px, 94vw);
  height: min(86vh, 900px);
  display: flex;
  flex-direction: column;
  background: var(--doc-bg);
  border: 1px solid var(--doc-border);
}
.doc-title {
  padding: 8px 14px;
  border-bottom: 1px solid var(--doc-border);
  color: var(--accent);
}
.doc-body {
  flex: 1;
  overflow-y: auto;
  padding: 14px 18px;
  white-space: pre-wrap;
  word-wrap: break-word;
  scrollbar-width: thin;
  scrollbar-color: #444 transparent;
}
.doc-foot { padding: 8px 14px; border-top: 1px solid var(--doc-border); text-align: right; }
.doc-foot button {
  font: inherit; color: var(--btn-fg); background: var(--btn); border: 0; padding: 6px 22px; cursor: pointer;
}
.doc-foot button:hover { background: var(--btn-hover); color: #fff; }

/* ---- teclado numérico (enter_code) -------------------------------- */
.pad { display: grid; grid-template-columns: repeat(3, 70px); gap: 6px; justify-content: center; margin: 10px 0; }
.pad button { font: inherit; background: var(--btn); color: var(--btn-fg); border: 0; padding: 10px 0; cursor: pointer; }
.pad button:hover { background: var(--btn-hover); color: #fff; }
.pad-display { text-align: center; font-size: 22px; letter-spacing: .3em; min-height: 1.4em; color: var(--accent); }

/* ---- cápsulas del tiempo ----------------------------------------- */
#player { padding: 6px 60px 0; }
#player[hidden] { display: none; }
#player audio { width: 100%; height: 44px; }
.player-note { color: var(--strong); margin-top: 6px; }

/* ---- glitch ------------------------------------------------------- */
#screen.glitch { animation: glitch .12s steps(2) infinite; }
@keyframes glitch {
  0%   { transform: translate(0, 0); text-shadow: 2px 0 #f0f3, -2px 0 #0ff3; filter: none; }
  25%  { transform: translate(-3px, 1px) skewX(-2deg); text-shadow: -3px 0 #f0f6, 3px 0 #0ff6; }
  50%  { transform: translate(2px, -1px); filter: contrast(1.8) brightness(1.3); }
  75%  { transform: translate(-1px, 2px) skewX(3deg); text-shadow: 4px 0 #f0f5, -4px 0 #0ff5; }
  100% { transform: translate(0, 0); }
}

@media (max-width: 640px) {
  html, body { font-size: calc(var(--fs, 20px) * .8); }
  #screen { padding: 12px 12px 6px; }
  #choices { padding: 8px 12px 14px; }
  #choices.two { grid-template-columns: 1fr; }
}

/* ---- archivos A–Z -------------------------------------------------- */
#screen .lib-head {
  position: sticky;
  top: -18px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 6px 0 10px;
  background: var(--bg);
  white-space: normal;
}
.lib-filter {
  flex: 1;
  min-width: 12em;
  font: inherit;
  font-size: .9em;
  color: var(--fg);
  background: #151515;
  border: 1px solid #3a3a3a;
  padding: .3em .6em;
}
.lib-filter:focus { outline: none; border-color: var(--accent); }
.lib-list { display: flex; flex-direction: column; }
.lib-row {
  display: flex;
  justify-content: space-between;
  gap: 1em;
  font: inherit;
  text-align: left;
  color: var(--fg);
  background: transparent;
  border: 0;
  border-bottom: 1px solid #1c1c1c;
  padding: .3em .4em;
  cursor: pointer;
}
.lib-row:hover, .lib-row:focus-visible { background: #1d1d1d; color: #fff; outline: none; }
.lib-row[hidden] { display: none; }
.lib-name { color: var(--accent); overflow-wrap: anywhere; }
.lib-row.read .lib-name { color: #5f8fb8; }
.lib-meta { color: var(--dim); white-space: nowrap; font-size: .85em; }
@media (max-width: 640px) {
  .lib-row { flex-direction: column; gap: 0; }
  .lib-meta { white-space: normal; }
}