/* ============================================================
   EMILIO MAILLO — CUESTIONARIO IA
   styles.css · Sistema visual (marca 2026 · 5c Vermillion)
   ------------------------------------------------------------
   Inter Tight (display + body) · JetBrains Mono (meta).
   El bermellón se gana: sólo donde importa.
   ============================================================ */

:root {
  --vm-paper:      #FFFFFF;
  --vm-paper-soft: #FAFAFA;
  --vm-ink:        #0A0A0A;
  --vm-ink-soft:   #1F1F1F;
  --vm-dim:        #8A8A8A;
  --vm-dim-2:      #B8B8B8;
  --vm-rule:       #0A0A0A;
  --vm-rule-soft:  #E8E8E8;
  --vm-rule-hair:  #F1F1F1;
  --vm-red:        #E1261C;
  --vm-red-ink:    #B81C13;

  --font-display: 'Inter Tight', system-ui, -apple-system, sans-serif;
  --font-mono:    'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

  --pad-x: clamp(28px, 8vw, 160px);
  --q-max: 760px;

  --q-title: clamp(30px, 4.4vw, 56px);
  --q-desc:  clamp(17px, 1.5vw, 21px);
  --opt:     clamp(17px, 1.4vw, 20px);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; height: 100%; }

body {
  background: var(--vm-paper);
  color: var(--vm-ink);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow: hidden;
}

::selection { background: var(--vm-red); color: #fff; }

/* ----------------------------------------------------------------
   PROGRESO (barra superior)
   ---------------------------------------------------------------- */
.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--vm-rule-hair);
  z-index: 60;
}
.progress__fill {
  height: 100%;
  width: 0;
  background: var(--vm-red);
  transition: width 520ms cubic-bezier(.2,.7,.3,1);
}

/* ----------------------------------------------------------------
   CHROME (wordmark + contador de bloque) — fluye con el contenido
   (NO fijo): se desplaza al hacer scroll en preguntas largas.
   ---------------------------------------------------------------- */
.chrome {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex: none;
  margin-bottom: clamp(40px, 7vh, 80px);
}
.chrome__wm {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 16px;
  letter-spacing: -0.03em;
  color: var(--vm-ink);
}
.chrome__wm .dot { color: var(--vm-red); }

.chrome__meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vm-dim);
  display: flex;
  gap: 20px;
  align-items: baseline;
}
.chrome__meta .count { color: var(--vm-ink); font-variant-numeric: tabular-nums; }
.chrome__meta .sep { color: var(--vm-dim-2); }

/* ----------------------------------------------------------------
   STAGE — una pregunta a la vez
   ---------------------------------------------------------------- */
.stage {
  position: relative;
  height: 100%;
  width: 100%;
}

.screen {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  padding: 32px var(--pad-x) 110px;
  overflow-y: auto;
}
.screen__inner {
  width: 100%;
  max-width: var(--q-max);
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

/* Animación de entrada (data-anim controla la dirección).
   Sólo se anima transform + un fade que arranca visible: si la
   animación no progresa (pestaña en segundo plano, captura DOM,
   reduced-motion) el contenido SIEMPRE queda visible. */
.screen__inner { opacity: 1; }
.screen[data-anim="in-up"]   .screen__inner { animation: inUp 520ms cubic-bezier(.2,.7,.3,1) both; }
.screen[data-anim="in-down"] .screen__inner { animation: inDown 520ms cubic-bezier(.2,.7,.3,1) both; }
@keyframes inUp {
  from { opacity: 0.4; transform: translateY(40px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes inDown {
  from { opacity: 0.4; transform: translateY(-40px); }
  to   { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
  .screen__inner { animation: none !important; }
  .progress__fill { transition: none; }
}

/* ----------------------------------------------------------------
   ETIQUETA DE PREGUNTA  (01 →)
   ---------------------------------------------------------------- */
.q-index {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--vm-red);
  margin-bottom: 20px;
  font-variant-numeric: tabular-nums;
}
.q-index .arrow { color: var(--vm-dim-2); }

/* ----------------------------------------------------------------
   TÍTULO + DESCRIPCIÓN
   ---------------------------------------------------------------- */
.q-title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: var(--q-title);
  line-height: 1.06;
  letter-spacing: -0.03em;
  margin: 0;
  text-wrap: balance;
}
.q-title .req { color: var(--vm-red); margin-left: 2px; }

.q-desc {
  margin: 18px 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: var(--q-desc);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--vm-dim);
  max-width: 40ch;
  text-wrap: pretty;
}

.q-body { margin-top: clamp(34px, 5vh, 56px); }

/* ----------------------------------------------------------------
   TEXTO (input / textarea)
   ---------------------------------------------------------------- */
.field-text {
  width: 100%;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(22px, 2.6vw, 32px);
  letter-spacing: -0.02em;
  color: var(--vm-ink);
  padding: 6px 2px 14px;
  border-bottom: 2px solid var(--vm-rule-soft);
  transition: border-color 220ms ease;
  resize: none;
}
.field-text::placeholder { color: var(--vm-dim-2); }
.field-text:focus { border-bottom-color: var(--vm-red); }
textarea.field-text { line-height: 1.4; min-height: 1.4em; overflow: hidden; }

/* ----------------------------------------------------------------
   OPCIONES (single / multi)
   ---------------------------------------------------------------- */
.options {
  display: grid;
  gap: 11px;
  max-width: 620px;
}
.opt {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
  text-align: left;
  background: var(--vm-paper);
  border: 1.5px solid var(--vm-rule-soft);
  border-radius: 2px;
  padding: 15px 18px;
  cursor: pointer;
  font-family: var(--font-display);
  font-size: var(--opt);
  letter-spacing: -0.01em;
  color: var(--vm-ink);
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}
.opt:hover { border-color: var(--vm-dim-2); background: var(--vm-paper-soft); transform: translateX(3px); }
.opt__key {
  flex: 0 0 auto;
  width: 26px; height: 26px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--vm-dim-2);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--vm-dim);
  transition: all 160ms ease;
}
.opt__label { flex: 1; line-height: 1.25; text-wrap: pretty; }
.opt__check {
  flex: 0 0 auto;
  opacity: 0;
  color: var(--vm-red);
  font-family: var(--font-mono);
  font-size: 15px;
  transition: opacity 160ms ease;
}
.opt.is-selected {
  border-color: var(--vm-red);
  background: #FFF6F5;
}
.opt.is-selected .opt__key {
  background: var(--vm-red);
  border-color: var(--vm-red);
  color: #fff;
}
.opt.is-selected .opt__check { opacity: 1; }

.opt-other {
  display: flex;
  align-items: center;
  gap: 16px;
}
.opt-other input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-display);
  font-size: var(--opt);
  color: var(--vm-ink);
  border-bottom: 1.5px solid var(--vm-rule-soft);
  padding: 4px 2px;
}
.opt-other input:focus { border-bottom-color: var(--vm-red); }
.opt-other input::placeholder { color: var(--vm-dim-2); }

.multi-hint {
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--vm-dim-2);
}

/* ----------------------------------------------------------------
   ESCALA (1–5)
   ---------------------------------------------------------------- */
.scale {
  display: flex;
  flex-direction: column;
  gap: 14px;
  max-width: 520px;
}
.scale__row { display: flex; gap: 12px; }
.scale__btn {
  flex: 1;
  aspect-ratio: 1 / 1;
  max-width: 84px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--vm-rule-soft);
  border-radius: 2px;
  background: var(--vm-paper);
  cursor: pointer;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(22px, 2.4vw, 30px);
  letter-spacing: -0.02em;
  color: var(--vm-ink);
  transition: all 160ms ease;
  font-variant-numeric: tabular-nums;
}
.scale__btn:hover { border-color: var(--vm-dim-2); background: var(--vm-paper-soft); transform: translateY(-2px); }
.scale__btn.is-selected {
  border-color: var(--vm-red);
  background: var(--vm-red);
  color: #fff;
}
.scale__labels {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--vm-dim);
}

/* ----------------------------------------------------------------
   MATRIZ DE VALORACIÓN (rating_grid)
   ---------------------------------------------------------------- */
.grid {
  border-top: 1px solid var(--vm-ink);
  max-width: 720px;
}
.grid__row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--vm-rule-soft);
}
.grid__label {
  font-family: var(--font-display);
  font-size: clamp(15px, 1.25vw, 17px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  text-wrap: pretty;
}
.grid__dots { display: flex; gap: 8px; }
.grid__dot {
  width: 34px; height: 34px;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--vm-rule-soft);
  border-radius: 50%;
  background: var(--vm-paper);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--vm-dim);
  transition: all 140ms ease;
  font-variant-numeric: tabular-nums;
}
.grid__dot:hover { border-color: var(--vm-dim-2); background: var(--vm-paper-soft); color: var(--vm-ink); }
.grid__dot.is-selected {
  border-color: var(--vm-red);
  background: var(--vm-red);
  color: #fff;
}
.grid__head {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 28px;
  padding-bottom: 10px;
  align-items: end;
}
.grid__scalehint {
  display: flex;
  gap: 8px;
}
.grid__scalehint span {
  width: 34px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--vm-dim-2);
}

/* ----------------------------------------------------------------
   PIE DEL PASO — botón OK + ayuda de teclado
   ---------------------------------------------------------------- */
.q-foot {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: clamp(34px, 5vh, 52px);
}
.btn-ok {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--vm-ink);
  color: #fff;
  border: none;
  border-radius: 2px;
  padding: 13px 24px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 180ms ease, transform 180ms ease;
}
.btn-ok:hover { background: var(--vm-red); transform: translateY(-1px); }
.btn-ok .key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  opacity: 0.7;
}
.foot-hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vm-dim);
}
.foot-hint kbd {
  font-family: var(--font-mono);
  background: var(--vm-paper-soft);
  border: 1px solid var(--vm-rule-soft);
  border-radius: 3px;
  padding: 1px 6px;
  color: var(--vm-ink);
}
.foot-error {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--vm-red);
  opacity: 0;
  transition: opacity 160ms ease;
}
.foot-error.is-on { opacity: 1; }

/* ----------------------------------------------------------------
   NAVEGACIÓN (flechas inferiores derechas)
   ---------------------------------------------------------------- */
.nav {
  position: fixed;
  right: var(--pad-x);
  bottom: 26px;
  display: flex;
  gap: 2px;
  z-index: 55;
}
.nav__btn {
  width: 46px; height: 42px;
  display: grid;
  place-items: center;
  background: var(--vm-ink);
  color: #fff;
  border: none;
  cursor: pointer;
  transition: background 160ms ease, opacity 160ms ease;
}
.nav__btn:first-child { border-radius: 3px 0 0 3px; border-right: 1px solid rgba(255,255,255,0.18); }
.nav__btn:last-child  { border-radius: 0 3px 3px 0; }
.nav__btn:hover:not(:disabled) { background: var(--vm-red); }
.nav__btn:disabled { opacity: 0.32; cursor: default; }
.nav__btn svg { width: 16px; height: 16px; }

/* ----------------------------------------------------------------
   PORTADA + CIERRE
   ---------------------------------------------------------------- */
.cover__kicker,
.end__kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--vm-dim);
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 30px;
}
.cover__kicker .red,
.end__kicker .red { color: var(--vm-red); }

.cover__wm {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(40px, 6vw, 84px);
  line-height: 0.94;
  letter-spacing: -0.045em;
  margin: 0 0 28px;
}
.cover__wm .dot { color: var(--vm-red); }

.cover__title,
.end__title {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.02;
  letter-spacing: -0.035em;
  margin: 0;
  text-wrap: balance;
  max-width: 18ch;
}
.cover__title .dot,
.end__title .dot { color: var(--vm-red); }

.cover__desc,
.end__desc {
  margin: 26px 0 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--vm-ink-soft);
  max-width: 46ch;
  text-wrap: pretty;
}

.cover__cta {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  margin-top: clamp(36px, 5vh, 56px);
}
.btn-start {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  background: var(--vm-red);
  color: #fff;
  border: none;
  border-radius: 2px;
  padding: 16px 32px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 19px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: background 180ms ease, transform 180ms ease;
}
.btn-start:hover { background: var(--vm-red-ink); transform: translateY(-1px); }
.cover__cta .hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vm-dim);
}
.cover__cta .hint kbd {
  background: var(--vm-paper-soft);
  border: 1px solid var(--vm-rule-soft);
  border-radius: 3px;
  padding: 1px 6px;
  color: var(--vm-ink);
}

.cover__meta,
.end__meta {
  margin-top: clamp(48px, 8vh, 88px);
  padding-top: 18px;
  border-top: 1px solid var(--vm-rule-soft);
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vm-dim);
  max-width: var(--q-max);
}
.cover__meta .red,
.end__meta .red { color: var(--vm-red); }

.end__title { font-size: clamp(40px, 6vw, 76px); }
.end__seal {
  margin-top: 38px;
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--vm-dim);
}
.end__seal .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--vm-red);
}

/* ----------------------------------------------------------------
   RESPONSIVE
   ---------------------------------------------------------------- */
@media (max-width: 720px) {
  .chrome__meta { gap: 12px; }
  .nav { bottom: 18px; }
  .screen { padding-top: 24px; padding-bottom: 96px; }
  .grid__row { grid-template-columns: 1fr; gap: 12px; }
  .grid__head { display: none; }
  .grid__dots { gap: 10px; }
  .grid__dot { width: 40px; height: 40px; }
  .q-foot { flex-wrap: wrap; }
}