/* ===================================================================
   UXUARIA — diagnostico.css
   Funnel del diagnóstico AI MVP Rescue estilo Typeform (una pregunta por pantalla)
   =================================================================== */

:root {
  --tf-question-size: clamp(20px, 2.4vw, 26px);
  --tf-welcome-size:  clamp(32px, 5vw, 52px);
  --tf-input-size:    clamp(20px, 2.6vw, 28px);
  --tf-max-w:         720px;
  --tf-step-ease:     cubic-bezier(.2, .8, .2, 1);
  --tf-step-duration: .45s;
  --color-error:      #D93025;
  --color-error-bg:   #FDECEA;
  --color-choice-bg:  rgba(17,17,17,.03);
  --color-choice-bg-hover: rgba(17,17,17,.07);
  --color-choice-bg-selected: rgba(17,17,17,.12);
  --color-input-line: rgba(17,17,17,.25);
}

/* ===== PAGE ===== */
.tf-page {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font);
  min-height: 100vh;
  min-height: 100dvh;
}

/* ===== PROGRESS ===== */
.tf-progress {
  position: fixed;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--color-border);
  z-index: 20;
}

.tf-progress__bar {
  height: 100%;
  width: 0;
  background: var(--color-text);
  transition: width var(--tf-step-duration) var(--tf-step-ease);
}

/* ===== HEADER ===== */
.tf-header {
  position: fixed;
  inset: 4px 0 auto 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  z-index: 10;
  background: linear-gradient(var(--color-bg) 70%, transparent);
}

.tf-header__logo { text-decoration: none; }
.tf-header__logo .logo-text { font-size: var(--font-size-2xl); }

.tf-header__close {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  transition: background var(--transition), color var(--transition);
}

.tf-header__close:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

/* ===== STEPS (base: no-JS, everything stacked) ===== */
.tf-main {
  padding: 120px 24px 80px;
}

.tf-form {
  max-width: var(--tf-max-w);
  margin: 0 auto;
}

.tf-step {
  padding: 48px 0;
}

.tf-step--welcome,
.tf-nav { display: none; }

.tf-fieldset {
  border: 0;
  min-width: 0;
}

/* ===== QUESTION ===== */
.tf-question {
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: var(--tf-question-size);
  font-weight: var(--font-weight-medium);
  line-height: 1.35;
  letter-spacing: -.01em;
  margin-bottom: 28px;
  padding: 0;
}

.tf-question__num {
  flex-shrink: 0;
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  white-space: nowrap;
}

.tf-question__desc {
  margin: -16px 0 24px;
  padding-left: 44px;
  font-size: var(--font-size-lg);
  color: var(--color-text-muted);
}

.tf-required { color: var(--color-text-light); }

.tf-optional {
  font-size: .7em;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-light);
}

/* Honeypot anti-spam: fuera de pantalla, no display:none */
.tf-hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.tf-noscript {
  max-width: var(--tf-max-w);
  margin: 0 auto;
  font-size: var(--font-size-xl);
  line-height: var(--line-height-normal);
}

.tf-noscript a { text-decoration: underline; }

.tf-question + .tf-input,
.tf-question__desc + .tf-input,
.tf-choices,
.tf-actions,
.tf-error { margin-left: 44px; }

/* ===== TEXT INPUT ===== */
.tf-input {
  display: block;
  width: calc(100% - 44px);
  font-family: var(--font);
  font-size: var(--tf-input-size);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  background: transparent;
  border: 0;
  border-bottom: 1.5px solid var(--color-input-line);
  padding: 8px 0 10px;
  outline: none;
  border-radius: 0;
  transition: border-color var(--transition);
}

.tf-input::placeholder { color: var(--color-text-light); opacity: .6; }
.tf-input:focus { border-bottom: 2px solid var(--color-text); }

.tf-input--textarea {
  resize: none;
  overflow: hidden;
  line-height: 1.4;
  min-height: 52px;
}

/* ===== CHOICES ===== */
.tf-choices {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 420px;
}

.tf-choice {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px 10px 10px;
  border: 1px solid var(--color-input-line);
  border-radius: var(--radius-sm);
  background: var(--color-choice-bg);
  font-size: var(--font-size-lg);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
}

.tf-choice:hover { background: var(--color-choice-bg-hover); }

.tf-choice input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.tf-choice__key {
  flex-shrink: 0;
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid var(--color-input-line);
  border-radius: 4px;
  background: var(--color-bg);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  transition: background var(--transition), color var(--transition);
}

.tf-choice:has(input:checked) {
  background: var(--color-choice-bg-selected);
  border-color: var(--color-text);
}

.tf-choice:has(input:checked) .tf-choice__key {
  background: var(--color-text);
  border-color: var(--color-text);
  color: var(--color-text-inverse);
}

.tf-choice:has(input:focus-visible) {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.tf-choice.is-blinking { animation: tf-blink .5s steps(1) 1; }

@keyframes tf-blink {
  0%, 50%  { background: var(--color-choice-bg-selected); }
  25%, 75% { background: var(--color-choice-bg); }
}

/* ===== ACTIONS ===== */
.tf-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.tf-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font);
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-inverse);
  background: var(--color-text);
  border: 0;
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  cursor: pointer;
  text-decoration: none;
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), transform var(--transition);
}

.tf-btn:hover { background: var(--color-text-hover); }
.tf-btn:active { transform: scale(.98); }
.tf-btn:disabled { opacity: .6; cursor: progress; }

.tf-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.tf-hint strong { font-weight: var(--font-weight-bold); color: var(--color-text); }

/* ===== ERROR ===== */
.tf-error {
  display: none;
  width: fit-content;
  margin-top: 14px;
  padding: 6px 12px;
  border-radius: 4px;
  background: var(--color-error-bg);
  color: var(--color-error);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.tf-error.is-visible {
  display: block;
  animation: tf-shake .3s ease;
}

@keyframes tf-shake {
  0%, 100% { transform: translateX(0); }
  25%      { transform: translateX(-4px); }
  75%      { transform: translateX(4px); }
}

/* ===== WELCOME / END ===== */
.tf-welcome__title {
  font-size: var(--tf-welcome-size);
  font-weight: var(--font-weight-bold);
  letter-spacing: -.035em;
  line-height: var(--line-height-tight);
  margin-bottom: 16px;
}

.tf-welcome__eyebrow {
  margin-bottom: 12px;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.tf-welcome__desc {
  font-size: var(--font-size-xl);
  color: var(--color-text-muted);
  line-height: var(--line-height-normal);
  max-width: 560px;
}

.tf-welcome__desc + .tf-welcome__desc { margin-top: 12px; }
.tf-welcome__desc a { color: var(--color-text); text-decoration: underline; }

.tf-step--welcome .tf-actions,
.tf-thanks .tf-actions { margin-left: 0; margin-top: 32px; }

.tf-welcome__time {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ===== THANK YOU PAGE (/diagnostico/gracias) ===== */
.tf-thanks {
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--tf-max-w);
  min-height: calc(100vh - 200px);
  min-height: calc(100dvh - 200px);
  margin: 0 auto;
}

.tf-end__icon {
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin-bottom: 24px;
  border-radius: var(--radius-full);
  background: var(--color-text);
  color: var(--color-text-inverse);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
}

/* Level A booking block on the thank-you page */
.tf-booking__title {
  margin-top: 28px;
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}
.tf-booking__list {
  margin-top: 10px;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--color-text-muted);
  line-height: 1.55;
}
.tf-booking__note {
  margin-top: 16px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}
.tf-booking .tf-actions { margin-left: 0; margin-top: 28px; }
ul.tf-booking__list { list-style: disc; }
ol.tf-booking__list { list-style: decimal; }
.tf-thanks [hidden] { display: none !important; }

/* ===================================================================
   ENHANCED MODE (JS) — one step per screen
   =================================================================== */
/* .is-enhanced goes on <html> from an inline script in <head>, so the
   one-step layout applies from the first paint (no flash of stacked steps) */
.is-enhanced .tf-page { overflow: hidden; }

.is-enhanced .tf-main {
  position: fixed;
  inset: 0;
  padding: 0;
}

.is-enhanced .tf-form {
  position: relative;
  height: 100%;
  max-width: none;
}

.is-enhanced .tf-step {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 96px 24px 96px;
  overflow-y: auto;
  opacity: 0;
  visibility: hidden;
  transform: translateY(40px);
  transition:
    opacity var(--tf-step-duration) var(--tf-step-ease),
    transform var(--tf-step-duration) var(--tf-step-ease),
    visibility 0s linear var(--tf-step-duration);
}

.is-enhanced .tf-step.is-above { transform: translateY(-40px); }

.is-enhanced .tf-step.is-active {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition-delay: 0s;
}

.is-enhanced .tf-step__inner {
  width: 100%;
  max-width: var(--tf-max-w);
  margin: auto 0;
}

.is-enhanced .tf-nav {
  position: fixed;
  right: 24px;
  bottom: 24px;
  display: flex;
  gap: 1px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  z-index: 10;
}

.tf-nav__btn {
  display: grid;
  place-items: center;
  width: 40px;
  height: 36px;
  border: 0;
  background: var(--color-text);
  color: var(--color-text-inverse);
  cursor: pointer;
  transition: background var(--transition);
}

.tf-nav__btn:hover { background: var(--color-text-hover); }
.tf-nav__btn:disabled { opacity: .35; cursor: default; }

.is-enhanced .tf-step--welcome { display: flex; }

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
  .tf-header { padding: 16px 20px; }

  .tf-question { flex-direction: column; gap: 4px; }

  .tf-question + .tf-input,
  .tf-question__desc + .tf-input,
  .tf-choices,
  .tf-actions,
  .tf-error { margin-left: 0; }

  .tf-question__desc { padding-left: 0; margin-top: -20px; }
  .tf-input { width: 100%; }
  .tf-choices { max-width: none; }
  .tf-hint { display: none; }

  .is-enhanced .tf-step { padding: 88px 20px 88px; align-items: flex-start; }
  .is-enhanced .tf-step__inner { margin-top: 12vh; }
}

@media (prefers-reduced-motion: reduce) {
  .is-enhanced .tf-step,
  .tf-progress__bar { transition-duration: 0s; }
  .tf-choice.is-blinking,
  .tf-error.is-visible { animation: none; }
}