/* ══════════════════════════════════════════════════════════════
   ATS Gastronómico — styles.css
   Mobile-first | Dark premium | Red + Gold accent
   Paleta: fondo oscuro · rojo #d42020 · gold #c9953a
   ══════════════════════════════════════════════════════════════ */

/* ── 1. VARIABLES ── */
:root {
  /* Backgrounds */
  --bg:         #0b0b0f;
  --bg-surface: #13131a;
  --bg-raised:  #1b1b24;
  --bg-hover:   #21212d;

  /* Borders */
  --border:       rgba(255, 255, 255, 0.07);
  --border-focus: rgba(255, 255, 255, 0.18);

  /* Brand */
  --red:       #d42020;
  --red-dark:  #a61919;
  --red-light: #e83434;
  --red-glow:  rgba(212, 32, 32, 0.14);

  --gold:      #c9953a;
  --gold-lt:   #e0b050;
  --gold-glow: rgba(201, 149, 58, 0.12);

  /* Text */
  --t1: #f0efe8;
  --t2: #8a8a9e;
  --t3: #474758;

  /* Semantic */
  --warn: rgba(212, 32, 32, 0.1);
  --warn-border: rgba(212, 32, 32, 0.3);

  /* Quiz accent colors */
  --qa1: #b92b2b;
  --qa2: #1f6ea8;
  --qa3: #c46010;
  --qa4: #197a36;

  /* Spacing */
  --s1: 0.375rem;
  --s2: 0.625rem;
  --s3: 1rem;
  --s4: 1.5rem;
  --s5: 2rem;
  --s6: 3rem;

  /* Layout */
  --header-h:    64px;
  --progress-h:  3px;
  --indicator-h: 34px;
  --nav-h:       72px;
  --max-w:       520px;

  /* Radii */
  --r-sm:  8px;
  --r-md:  12px;
  --r-lg:  16px;
  --r-xl:  22px;
  --r-pill: 999px;

  /* Transitions */
  --ease-out: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-spring: cubic-bezier(0.34, 1.3, 0.64, 1);
  --t-fast: 0.14s ease;
  --t-base: 0.24s ease;
  --t-slow: 0.38s var(--ease-out);

  /* Typography */
  --font: -apple-system, BlinkMacSystemFont, 'Helvetica Neue',
          'Segoe UI', Arial, sans-serif;
}

/* ── 2. RESET ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  /* Sin scroll-behavior en html para evitar conflictos */
}

/* body ocupa exactamente la pantalla, sin scroll propio */
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--t1);
  line-height: 1.55;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;           /* el scroll lo maneja form-main */
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { display: block; max-width: 100%; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  -webkit-appearance: none;
  appearance: none;
}

input, textarea, select {
  font-family: inherit;
  -webkit-appearance: none;
  appearance: none;
}

/* ── 3. APP SHELL ── */
#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;             /* altura exacta del viewport */
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  overflow: hidden;           /* contiene el scroll dentro */

  background:
    radial-gradient(ellipse 90% 35% at 50% 0%,
      rgba(212, 32, 32, 0.07) 0%,
      transparent 60%
    ),
    var(--bg);
}

/* ── 4. HEADER ── */
.app-header {
  display: flex;
  align-items: center;
  gap: var(--s3);
  padding: 0 var(--s4);
  height: var(--header-h);
  background: rgba(11, 11, 15, 0.92);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;             /* no se comprime */
  z-index: 30;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.header-logos {
  display: flex;
  align-items: center;
  gap: var(--s2);
  flex-shrink: 0;
}

.logo {
  object-fit: contain;
  flex-shrink: 0;
}

.logo--sabores {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--bg-surface);
}

.logo--ext {
  width: 36px;
  height: 36px;
  border-radius: var(--r-sm);
  background: var(--bg-surface);
}

.logo-divider {
  width: 1px;
  height: 28px;
  background: var(--border);
}

.header-text { flex: 1; min-width: 0; }

.header-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--t1);
  letter-spacing: 0.015em;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.header-sub {
  font-size: 0.7rem;
  color: var(--t2);
  margin-top: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── 5. PROGRESS BAR ── */
.progress-wrap {
  height: var(--progress-h);
  background: var(--bg-raised);
  flex-shrink: 0;
  z-index: 29;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--red), var(--gold));
  border-radius: 0 var(--r-pill) var(--r-pill) 0;
  transition: width var(--t-slow);
}

/* ── 6. STEP INDICATOR ── */
.step-indicator {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--s4);
  height: var(--indicator-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  z-index: 28;
}

.step-ind-cur {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.step-ind-name {
  font-size: 0.7rem;
  color: var(--t3);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── 7. FORM MAIN ── */
.form-main {
  flex: 1;                          /* ocupa el espacio restante */
  overflow-y: scroll;               /* scroll siempre visible en iOS */
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior-y: contain;
  scroll-behavior: smooth;
  padding: var(--s4);
  padding-bottom: calc(var(--nav-h) + var(--s5));
  /* Fuerza un contexto de scroll propio en iOS */
  transform: translateZ(0);
  -webkit-transform: translateZ(0);
}

/* ── 8. FORM STEPS — sistema de transición ── */
.form-step {
  display: none;
}

.form-step.is-active {
  display: block;
  animation: stepIn var(--t-slow) forwards;
}

@keyframes stepIn {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ── 9. STEP HEADER ── */
.step-header {
  margin-bottom: var(--s5);
}

.step-title {
  font-size: clamp(1.6rem, 5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--t1);
  line-height: 1.15;
}

.step-sub {
  font-size: 0.875rem;
  color: var(--t2);
  margin-top: var(--s1);
}

/* ── 10. CONFIG PANEL ── */
.config-panel {
  background: rgba(201, 149, 58, 0.05);
  border: 1px solid rgba(201, 149, 58, 0.18);
  border-radius: var(--r-md);
  padding: var(--s3);
  margin-bottom: var(--s4);
}

.config-label {
  display: flex;
  align-items: center;
  gap: var(--s1);
  font-size: 0.68rem;
  font-weight: 700;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: var(--s2);
  cursor: default;
}

.config-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(201, 149, 58, 0.25);
  border-radius: var(--r-sm);
  padding: 0.5rem 0.75rem;
  font-size: 0.78rem;
  color: var(--t1);
  outline: none;
  transition: border-color var(--t-fast);
}

.config-input:focus {
  border-color: var(--gold);
}

.config-input::placeholder { color: var(--t3); }

/* ── 11. FIELD LAYOUT ── */
.field {
  margin-bottom: var(--s4);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s3);
  margin-bottom: var(--s4);
}

.field-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--t2);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--s2);
}

.req { color: var(--red); margin-left: 2px; }

.field-hint {
  display: block;
  font-size: 0.7rem;
  color: var(--t3);
  margin-top: 5px;
}

.field-desc {
  font-size: 0.825rem;
  color: var(--t2);
  line-height: 1.55;
  margin-bottom: var(--s2);
  font-style: italic;
}

/* ── 12. INPUTS ── */
.field-input {
  width: 100%;
  background: var(--bg-raised);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.875rem 1rem;
  font-size: 1rem;
  color: var(--t1);
  outline: none;
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  line-height: 1.4;
}

.field-input::placeholder { color: var(--t3); }

.field-input:focus {
  border-color: var(--red);
  box-shadow: 0 0 0 3px var(--red-glow);
}

.field-input.is-error {
  border-color: var(--red-light);
  box-shadow: 0 0 0 3px var(--red-glow);
}

.field-input[type="number"]::-webkit-inner-spin-button,
.field-input[type="number"]::-webkit-outer-spin-button { -webkit-appearance: none; }
.field-input[type="number"] { -moz-appearance: textfield; }

/* ── 13. SECTION SEPARATOR ── */
.section-sep {
  display: flex;
  align-items: center;
  gap: var(--s3);
  margin: var(--s5) 0 var(--s4);
}

.section-sep::before,
.section-sep::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.section-sep-lbl {
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--red);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

/* ── 14. OPTION BUTTONS (radio-style) ── */
.opt-group {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
}

.opt-btn {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  width: 100%;
  padding: 0.875rem 1rem;
  background: var(--bg-raised);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  text-align: left;
  position: relative;
  overflow: hidden;
  transition:
    border-color var(--t-fast),
    background    var(--t-fast),
    box-shadow    var(--t-fast),
    transform     var(--t-fast);
}

.opt-btn::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 3px;
  background: transparent;
  border-radius: 0 2px 2px 0;
  transition: background var(--t-fast);
}

.opt-btn:hover {
  border-color: var(--border-focus);
  background: var(--bg-hover);
}

.opt-btn:active { transform: scale(0.985); }

.opt-btn.is-sel {
  border-color: var(--red);
  background: rgba(212, 32, 32, 0.06);
  box-shadow: 0 0 0 1px rgba(212, 32, 32, 0.2);
}

.opt-btn.is-sel::before { background: var(--red); }

.opt-dot {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid var(--t3);
  flex-shrink: 0;
  position: relative;
  transition: border-color var(--t-fast);
}

.opt-btn.is-sel .opt-dot {
  border-color: var(--red);
  background: var(--red);
}

.opt-btn.is-sel .opt-dot::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #fff;
}

.opt-lbl {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--t1);
  line-height: 1.4;
}

.opt-btn.is-sel .opt-lbl { color: #fff; }

/* ── 15. CHECKBOX GROUP ── */
.check-group {
  display: flex;
  flex-direction: column;
  gap: var(--s2);
}

.check-opt {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.875rem 1rem;
  background: var(--bg-raised);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  cursor: pointer;
  user-select: none;
  transition: border-color var(--t-fast), background var(--t-fast);
}

.check-opt input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.check-box {
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 2px solid var(--t3);
  flex-shrink: 0;
  position: relative;
  transition: all var(--t-fast);
  background: transparent;
}

.check-opt.is-checked .check-box {
  background: var(--red);
  border-color: var(--red);
}

.check-opt.is-checked .check-box::after {
  content: '';
  position: absolute;
  left: 5px;
  top: 2px;
  width: 6px;
  height: 10px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(44deg);
}

.check-opt.is-checked {
  border-color: var(--red);
  background: rgba(212, 32, 32, 0.06);
}

.check-lbl {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--t1);
}

/* ── 16. BADGES Y ADVERTENCIAS ── */
.badge-excl {
  display: inline-flex;
  align-items: center;
  background: rgba(212, 32, 32, 0.12);
  color: #ff7070;
  font-size: 0.6rem;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: var(--r-pill);
  letter-spacing: 0.07em;
  vertical-align: middle;
  margin-left: 6px;
}

.excl-warn {
  display: flex;
  align-items: flex-start;
  gap: var(--s2);
  background: var(--warn);
  border: 1px solid var(--warn-border);
  border-radius: var(--r-md);
  padding: var(--s3);
  margin-top: var(--s2);
  font-size: 0.85rem;
  color: #ff8585;
  line-height: 1.5;
  animation: stepIn var(--t-base) forwards;
}

.step-error {
  display: none;
  background: var(--warn);
  border: 1px solid var(--warn-border);
  border-radius: var(--r-md);
  padding: var(--s3);
  margin-bottom: var(--s3);
  font-size: 0.85rem;
  color: #ff8585;
  animation: stepIn var(--t-base) forwards;
}

.step-error.is-visible { display: block; }

/* ── 17. QUIZ ── */
.quiz-header { margin-bottom: var(--s4); }

.quiz-progress-track {
  height: 3px;
  background: rgba(255, 255, 255, 0.07);
  border-radius: var(--r-pill);
  overflow: hidden;
  margin-bottom: var(--s3);
}

.quiz-progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--red), var(--gold));
  border-radius: var(--r-pill);
  transition: width 0.45s var(--ease-out);
}

.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--s3);
}

.quiz-counter {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--gold);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.quiz-tag {
  font-size: 0.68rem;
  color: var(--t3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.quiz-title {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--t2);
  line-height: 1.55;
}

.quiz-body { margin-bottom: var(--s5); }

.quiz-question {
  font-size: clamp(1rem, 3.5vw, 1.2rem);
  font-weight: 600;
  color: var(--t1);
  line-height: 1.5;
  margin-bottom: var(--s4);
  min-height: 3rem;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.quiz-answers {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s2);
}

.quiz-ans {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s2);
  padding: 1rem 0.625rem;
  min-height: 88px;
  border-radius: var(--r-lg);
  border: 2px solid transparent;
  font-size: 0.8rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.92);
  text-align: center;
  line-height: 1.3;
  cursor: pointer;
  transition: filter var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
  -webkit-tap-highlight-color: transparent;
}

.quiz-ans:active { transform: scale(0.96); }
.quiz-ans:hover  { filter: brightness(1.08); }

.quiz-ans--1 { background: var(--qa1); }
.quiz-ans--2 { background: var(--qa2); }
.quiz-ans--3 { background: var(--qa3); }
.quiz-ans--4 { background: var(--qa4); }

.quiz-ans.is-picked {
  border-color: rgba(255, 255, 255, 0.85);
  filter: brightness(1.12);
}

.quiz-ans.is-off {
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}

.quiz-ans.is-picked.is-off {
  opacity: 1;
  pointer-events: none;
}

.quiz-shape {
  font-size: 1.2rem;
  line-height: 1;
  display: block;
}

.quiz-footer { margin-top: var(--s3); }

.btn-quiz-next {
  width: 100%;
  background: var(--red);
  color: #fff;
  border-radius: var(--r-md);
  padding: 1rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: background var(--t-fast), transform var(--t-fast);
}

.btn-quiz-next:hover  { background: var(--red-light); }
.btn-quiz-next:active { background: var(--red-dark); transform: scale(0.99); }

/* ── 18. NAV STICKY ── */
.form-nav {
  position: relative;            /* ya no es fixed — vive en el flex */
  flex-shrink: 0;
  width: 100%;
  display: flex;
  align-items: center;
  gap: var(--s2);
  padding: var(--s3) var(--s4);
  padding-bottom: calc(var(--s3) + env(safe-area-inset-bottom, 0px));
  background: rgba(11, 11, 15, 0.96);
  border-top: 1px solid var(--border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  z-index: 40;
  height: var(--nav-h);
}

.btn-back {
  flex-shrink: 0;
  min-width: 88px;
  background: var(--bg-raised);
  color: var(--t2);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  transition: all var(--t-fast);
}

.btn-back:hover  { border-color: var(--border-focus); color: var(--t1); }
.btn-back:active { transform: scale(0.98); }

.btn-next {
  flex: 1;
  background: var(--red);
  color: #fff;
  border-radius: var(--r-md);
  padding: 0.875rem 1.25rem;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.015em;
  transition: background var(--t-fast), transform var(--t-fast);
}

.btn-next:hover  { background: var(--red-light); }
.btn-next:active { background: var(--red-dark); transform: scale(0.99); }
.btn-next:disabled {
  background: var(--bg-raised);
  color: var(--t3);
  cursor: not-allowed;
}

/* ── 19. PANTALLA DE GRACIAS ── */
.thanks-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--s5) 0 var(--s6);
  gap: var(--s3);
}

.thanks-logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--s3);
  margin-bottom: var(--s2);
}

.thanks-logos .logo--sabores { width: 52px; height: 52px; }
.thanks-logos .logo--ext     { width: 46px; height: 46px; }

.thanks-icon {
  font-size: 3.25rem;
  line-height: 1;
  animation: popIn 0.45s var(--ease-spring) forwards;
}

@keyframes popIn {
  from { transform: scale(0.4); opacity: 0; }
  to   { transform: scale(1);   opacity: 1; }
}

.thanks-title {
  font-size: clamp(1.6rem, 5vw, 2rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--t1);
  line-height: 1.15;
}

.thanks-msg {
  font-size: 0.9375rem;
  color: var(--t2);
  line-height: 1.65;
  max-width: 440px;
}

.thanks-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--s2);
  padding: 0.9375rem 1.5rem;
  border: 1.5px solid var(--red);
  border-radius: var(--r-md);
  background: var(--red);
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}

.thanks-cta:hover {
  background: var(--red-dark);
  border-color: var(--red-dark);
}

.thanks-cta:active { transform: scale(0.98); }

.thanks-cta:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--red) 35%, transparent);
  outline-offset: 3px;
}

.btn-exit {
  margin-top: var(--s1);
  background: var(--bg-raised);
  color: var(--t1);
  border: 1.5px solid var(--border);
  border-radius: var(--r-md);
  padding: 0.875rem 2.5rem;
  font-size: 1rem;
  font-weight: 600;
  transition: all var(--t-fast);
}

.btn-exit:hover  { background: var(--bg-hover); border-color: var(--border-focus); }
.btn-exit:active { transform: scale(0.98); }

/* ── 20. UTILIDADES ── */
[hidden] { display: none !important; }

/* ── 21. RESPONSIVE ── */
@media (max-width: 380px) {
  .field-row { grid-template-columns: 1fr; }
  .quiz-answers { grid-template-columns: 1fr 1fr; }
  .quiz-ans { min-height: 78px; font-size: 0.75rem; }
}

@media (min-width: 600px) {
  .form-main {
    padding: var(--s5);
    padding-bottom: calc(var(--nav-h) + var(--s5));
  }

  .step-title,
  .thanks-title { font-size: 2.2rem; }

  .opt-btn,
  .check-opt { padding: 1rem 1.25rem; }

  .field-input { padding: 1rem 1.1rem; }

  .quiz-ans { min-height: 100px; padding: 1.1rem 0.75rem; }
}

@media (min-width: 600px) and (min-height: 700px) {
  .field { margin-bottom: var(--s5); }
}