/* ════════════════════════════════════════════════════════════
   CÓGNITY · styles.css
   Paleta provisional — reemplazar con colores del manual de marca
   ════════════════════════════════════════════════════════════ */

/* ── Variables ─────────────────────────────────────────────── */
:root {
  /* Colores de marca Cognity */
  --color-primary:    #2B1A57;
  --color-primary-dk: #1B1137;
  --color-accent:     #7D63C7;
  --color-dark:       #101225;
  --color-dark-soft:  #2B2350;
  --color-mid:        #686387;
  --color-light:      #F3F0FA;
  --color-white:      #FFFFFF;
  --color-border:     #D8D0E8;
  --color-success:    #22C55E;
  --color-error:      #EF4444;

  /* Tipografía */
  --font-display: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-body:    'Manrope', system-ui, -apple-system, sans-serif;

  /* Espaciado */
  --space-xs:  0.5rem;
  --space-sm:  1rem;
  --space-md:  1.5rem;
  --space-lg:  2.5rem;
  --space-xl:  4rem;
  --space-2xl: 6rem;

  /* Radio */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Sombras */
  --shadow-sm: 0 1px 4px rgba(14,21,39,.08);
  --shadow-md: 0 4px 20px rgba(14,21,39,.10);
  --shadow-lg: 0 12px 40px rgba(14,21,39,.14);

  /* Transición */
  --transition: 200ms ease;

  /* Contenedor */
  --container-max: 1140px;
}

/* ── Reset básico ──────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-dark);
  background: var(--color-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: inherit; text-decoration: none; }

ul { list-style: none; }

/* ── Utilidades ────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

.section-eyebrow {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: .75rem;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-xl);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  line-height: 1.2;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-mid);
}

/* ── Botones ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .95rem;
  border-radius: var(--radius-sm);
  padding: .7rem 1.4rem;
  cursor: pointer;
  transition: background var(--transition), color var(--transition),
              box-shadow var(--transition), transform var(--transition);
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}
.btn--primary:hover, .btn--primary:focus-visible {
  background: var(--color-primary-dk);
  border-color: var(--color-primary-dk);
  box-shadow: 0 4px 16px rgba(43,26,87,.35);
  transform: translateY(-1px);
}

.btn--ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn--ghost:hover, .btn--ghost:focus-visible {
  background: rgba(43,26,87,.08);
}

.btn--sm { padding: .5rem 1rem; font-size: .875rem; }
.btn--lg { padding: .9rem 2rem; font-size: 1.05rem; }
.btn--full { width: 100%; }

/* Botón destacado "Experimentar ahora" */
.btn--cta {
  background: var(--color-accent, #7C3AED);
  border-color: var(--color-accent, #7C3AED);
  color: var(--color-white);
  box-shadow: 0 0 0 0 rgba(124,58,237,.45);
  animation: cta-pulse 2.4s ease-in-out infinite;
}
.btn--cta:hover, .btn--cta:focus-visible {
  background: #6D28D9;
  border-color: #6D28D9;
  box-shadow: 0 4px 18px rgba(124,58,237,.5);
  animation: none;
  transform: translateY(-2px);
}
@keyframes cta-pulse {
  0%,100% { box-shadow: 0 0 0 0 rgba(124,58,237,.45); }
  50%      { box-shadow: 0 0 0 7px rgba(124,58,237,0); }
}

/* ── NAV ────────────────────────────────────────────────────── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow-md); }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.nav__logo {
  display: flex;
  align-items: center;
  line-height: 1;
}
.nav__logo-image {
  width: auto;
  height: 42px;
  aspect-ratio: 6069 / 2585;
  object-fit: contain;
}

.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-size: .9rem;
  font-weight: 500;
}
.nav__links a:not(.btn) {
  color: var(--color-mid);
  transition: color var(--transition);
}
.nav__links a:not(.btn):hover { color: var(--color-dark); }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: .4rem;
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-dark);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav__mobile {
  display: none;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--color-border);
  padding: .5rem 1.25rem 1rem;
}
.nav__mobile a {
  display: block;
  padding: .65rem 0;
  font-size: .95rem;
  font-weight: 500;
  color: var(--color-mid);
  border-bottom: 1px solid var(--color-border);
}
.nav__mobile a:last-child { border-bottom: none; color: var(--color-primary); }
.nav__mobile.open { display: flex; }

/* ── HERO ───────────────────────────────────────────────────── */
.hero {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #101225 0%, #2B1A57 58%, #7D63C7 100%);
  color: var(--color-white);
  padding: var(--space-2xl) 0 var(--space-xl);
}

.hero__bg-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 80% 20%, rgba(155,194,216,.2) 0%, transparent 52%),
    radial-gradient(circle at 10% 80%, rgba(125,99,199,.3) 0%, transparent 50%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

.hero__eyebrow {
  display: inline-block;
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-sm);
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  line-height: 1.1;
  margin-bottom: var(--space-md);
  color: var(--color-white);
}

.hero__subtitle {
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255,255,255,.78);
  margin-bottom: var(--space-lg);
  max-width: 520px;
}

.hero__ctas {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero .btn--ghost {
  color: var(--color-white);
  border-color: rgba(255,255,255,.78);
  background: rgba(255,255,255,.08);
}

.hero .btn--ghost:hover,
.hero .btn--ghost:focus-visible {
  background: rgba(255,255,255,.16);
  border-color: var(--color-white);
}

/* Chat mock */
.hero__visual {
  display: flex;
  justify-content: flex-end;
}

.chat-mock {
  background: #e5e1ee;
  border: 1px solid #d8d1e8;
  border-radius: 22px;
  width: 100%;
  max-width: 520px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(15, 8, 35, .33);
}

.chat-mock__header {
  background: var(--color-primary);
  padding: .95rem 1rem .7rem;
  text-align: center;
}

.chat-mock__brand-image {
  width: auto;
  height: 42px;
  margin-inline: auto;
  filter: brightness(0) saturate(100%) invert(100%);
}

.chat-mock__tagline {
  color: rgba(255,255,255,.64);
  font-size: .72rem;
  font-style: italic;
  margin-top: .3rem;
}

.chat-mock__viewport {
  position: relative;
  background: #e7e3f0;
  padding: 1rem .95rem .9rem;
}

.chat-mock__row {
  display: flex;
  align-items: flex-start;
  gap: .55rem;
  margin-bottom: .65rem;
}

.chat-mock__avatar {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 999px;
  border: 2px solid #8c73c7;
  background: #f7f5fd;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.chat-mock__avatar-image {
  width: 19px;
  height: 19px;
  object-fit: contain;
}

.chat-mock__bubble {
  background: #ffffff;
  border: 1px solid #ddd6ea;
  border-radius: 14px;
  color: #4f4a68;
  padding: .68rem .78rem;
  font-size: .875rem;
  line-height: 1.45;
  box-shadow: 0 3px 10px rgba(26, 13, 52, .08);
}

#chatMockIntro,
#chatMockHint,
#chatMockQuery {
  display: block;
  min-height: 2.9em;
}

.chat-mock__bubble--user {
  max-width: 82%;
  margin-left: auto;
  margin-bottom: .78rem;
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: 14px 14px 4px 14px;
  box-shadow: 0 8px 18px rgba(29, 14, 61, .34);
}

.chat-mock__time {
  display: block;
  font-size: .64rem;
  color: rgba(255,255,255,.72);
  text-align: right;
  margin-top: .38rem;
}

.chat-mock__section-title {
  color: #302a4f;
  font-weight: 700;
  font-size: .88rem;
  margin-bottom: .45rem;
  min-height: 1.35em;
}

.chat-mock.state-intro .chat-mock__bubble--user,
.chat-mock.state-intro .chat-mock__section-title,
.chat-mock.state-intro .chat-mock__books {
  opacity: 0;
}

.chat-mock.state-query .chat-mock__section-title,
.chat-mock.state-query .chat-mock__books {
  opacity: 0;
}

.chat-mock.state-thinking .chat-mock__section-title,
.chat-mock.state-thinking .chat-mock__books {
  opacity: 0;
}

.chat-mock.state-skeleton .chat-mock__section-title,
.chat-mock.state-skeleton .chat-mock__books,
.chat-mock.state-complete .chat-mock__section-title,
.chat-mock.state-complete .chat-mock__books,
.chat-mock.state-skeleton .chat-mock__bubble--user,
.chat-mock.state-complete .chat-mock__bubble--user {
  opacity: 1;
}

.chat-mock__books {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: .42rem;
  margin-bottom: .75rem;
  min-height: 128px;
  transition: opacity .28s ease;
}

.chat-mock__book {
  background: #f7f5fc;
  border: 1px solid #dfd7ed;
  border-radius: 10px;
  padding: .24rem;
}

.chat-mock__cover {
  width: 100%;
  aspect-ratio: 1 / 1;
  min-height: 80px;
  border-radius: 8px;
  margin-bottom: .33rem;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  background-color: #d9cdef;
}

.chat-mock__cover--a {
  background-image: url("assets/covers/tapa1.jfif");
}

.chat-mock__cover--b {
  background-image: url("assets/covers/tapa2.jfif");
}

.chat-mock__cover--c {
  background-image: url("assets/covers/tapa3.jfif");
}

.chat-mock__cover--d {
  background-image: url("assets/covers/tapa4.jfif");
}

.chat-mock__line {
  height: 6px;
  border-radius: 999px;
  background: #d4c8ee;
  margin-bottom: .24rem;
}

.chat-mock__line--short {
  width: 70%;
  margin-bottom: 0;
}

.chat-mock__book--ghost {
  background: #f2edf8;
}

.chat-mock.state-complete .chat-mock__book--ghost {
  background: #f7f5fc;
}

.chat-mock__cover--skeleton,
.chat-mock__line--skeleton {
  position: relative;
  overflow: hidden;
  background: #d7caee;
}

.chat-mock__cover--skeleton::after,
.chat-mock__line--skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(255,255,255,.45), transparent);
  animation: shimmer 1.7s infinite;
}

.chat-mock.state-complete .chat-mock__cover--skeleton::after,
.chat-mock.state-complete .chat-mock__line--skeleton::after {
  display: none;
}

.chat-mock.state-complete .chat-mock__cover--c.chat-mock__cover--skeleton {
  background-color: transparent;
  background-image: url("assets/covers/tapa3.jfif");
}

.chat-mock.state-complete .chat-mock__cover--d.chat-mock__cover--skeleton {
  background-color: transparent;
  background-image: url("assets/covers/tapa4.jfif");
}

.chat-mock.state-complete .chat-mock__line--skeleton {
  background: #d4c8ee;
}

.chat-mock__input {
  border-radius: 999px;
  border: 2px solid #a58cdc;
  background: #fff;
  color: #564d73;
  padding: .45rem .44rem .45rem .75rem;
  font-size: .75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

#chatMockInput {
  display: block;
  min-height: 1.2em;
}

.chat-mock__send {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  font-size: .7rem;
}

.chat-mock__thinking {
  position: absolute;
  left: 53%;
  top: 58%;
  transform: translate(-50%, -50%);
  width: 58%;
  background: rgba(255,255,255,.95);
  border: 1px solid #ddd6ea;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(26, 13, 52, .16);
  padding: .8rem;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
}

.chat-mock.state-thinking .chat-mock__thinking {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.chat-mock__thinking p {
  color: #4a4168;
  font-size: .9rem;
  margin-bottom: .45rem;
}

.chat-mock__thinking-books {
  display: flex;
  justify-content: center;
  gap: .55rem;
}

.chat-mock__thinking-books span {
  width: 17px;
  height: 26px;
  border-radius: 3px;
  background: linear-gradient(180deg, #7e62c8, #5e44a8);
  box-shadow: 0 4px 8px rgba(68, 42, 131, .28);
  animation: bob 1.2s ease-in-out infinite;
}

.chat-mock__thinking-books span:nth-child(2) {
  animation-delay: .15s;
}

.chat-mock__thinking-books span:nth-child(3) {
  animation-delay: .3s;
}

.chat-mock__swap {
  transition: opacity .35s ease, transform .35s ease;
}

.chat-mock__swap.is-out {
  opacity: .2;
  transform: translateY(4px);
}

@keyframes shimmer {
  to {
    transform: translateX(100%);
  }
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-4px); }
}

.visible {
  opacity: 1 !important;
  transform: none !important;
}

.hero__scroll-hint {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  margin-top: var(--space-xl);
  font-size: .78rem;
  color: rgba(255,255,255,.4);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* ── PROBLEMA ───────────────────────────────────────────────── */
.problema {
  background: var(--color-light);
  padding: var(--space-2xl) 0;
}

.problema__inner { text-align: center; }

.problema__label {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--color-mid);
  margin-bottom: .75rem;
}

.problema__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  color: var(--color-dark);
  margin-bottom: var(--space-xl);
}

.problema__cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.problema__card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  text-align: left;
  transition: box-shadow var(--transition), transform var(--transition);
}
.problema__card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.problema__icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(43,26,87,.08);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: .75rem;
}

.problema__icon svg {
  width: 20px;
  height: 20px;
}

.problema__card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .5rem;
  color: var(--color-dark);
}

.problema__card p {
  font-size: .9rem;
  color: var(--color-mid);
  line-height: 1.65;
}

/* ── BENEFICIOS ─────────────────────────────────────────────── */
.beneficios {
  padding: var(--space-2xl) 0;
  background: var(--color-white);
}

.beneficios__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.beneficio-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.beneficio-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: var(--color-primary);
}

.beneficio-card__icon {
  width: 44px;
  height: 44px;
  background: rgba(43,26,87,.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}
.beneficio-card__icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--color-primary);
}

.beneficio-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: .5rem;
  color: var(--color-dark);
}

.beneficio-card p {
  font-size: .9rem;
  color: var(--color-mid);
  line-height: 1.65;
}

/* ── CASOS ──────────────────────────────────────────────────── */
.casos {
  background: var(--color-light);
  padding: var(--space-2xl) 0;
}

.caso-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.caso-card__badge {
  display: inline-block;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: .3rem .75rem;
  border-radius: 0 0 var(--radius-sm) 0;
}

.caso-card__inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 2rem;
  padding: 2rem 2rem 2.5rem;
}

.caso-card__context h3 {
  font-family: var(--font-display);
  font-size: 1.3rem;
  margin-bottom: .75rem;
  color: var(--color-dark);
}

.caso-card__situation {
  font-size: .9rem;
  color: var(--color-mid);
  line-height: 1.7;
}

.caso-card__resultados {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.resultado-item {
  display: flex;
  gap: .75rem;
  align-items: flex-start;
}

.resultado-item__icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .7rem;
  font-weight: 700;
  margin-top: .1rem;
}

.resultado-item strong {
  font-size: .9rem;
  font-weight: 700;
  color: var(--color-dark);
  display: block;
  margin-bottom: .2rem;
}

.resultado-item p {
  font-size: .85rem;
  color: var(--color-mid);
  line-height: 1.65;
}

/* ── CTA BAND ───────────────────────────────────────────────── */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dk));
  color: var(--color-white);
  padding: var(--space-xl) 0;
}

.cta-band__inner {
  text-align: center;
  max-width: 640px;
}

.cta-band h2 {
  font-family: var(--font-display);
  font-size: clamp(1.4rem, 3vw, 2rem);
  margin-bottom: .75rem;
}

.cta-band p {
  font-size: 1rem;
  color: rgba(255,255,255,.8);
  margin-bottom: 1.75rem;
}

.cta-band .btn--primary {
  background: var(--color-accent);
  color: var(--color-dark);
  border-color: var(--color-accent);
  font-size: 1rem;
}
.cta-band .btn--primary:hover {
  background: #6C52B7;
  border-color: #6C52B7;
  box-shadow: 0 6px 24px rgba(0,0,0,.2);
}

/* ── CONTACTO ───────────────────────────────────────────────── */
.contacto {
  padding: var(--space-2xl) 0;
  background: var(--color-white);
}

.contacto__inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: var(--space-xl);
  align-items: start;
}

.contacto__info .section-title { text-align: left; }

.contacto__info p {
  font-size: .95rem;
  color: var(--color-mid);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.contacto__detalles {
  display: flex;
  flex-direction: column;
  gap: .75rem;
}

.contacto__link {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: .9rem;
  font-weight: 500;
  color: var(--color-primary);
  transition: color var(--transition);
}
.contacto__link:hover { color: var(--color-primary-dk); }
.contacto__link svg { width: 16px; height: 16px; }

/* Formulario */
.contacto__form {
  background: var(--color-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.form-group label {
  font-size: .83rem;
  font-weight: 600;
  color: var(--color-dark-soft);
}

.form-optional {
  font-weight: 400;
  color: var(--color-mid);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-body);
  font-size: .9rem;
  padding: .6rem .85rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-white);
  color: var(--color-dark);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  width: 100%;
  resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(43,26,87,.16);
}

.form-group input.invalid,
.form-group textarea.invalid {
  border-color: var(--color-error);
}

.form-error {
  font-size: .78rem;
  color: var(--color-error);
  min-height: 1em;
}

.form-disclaimer {
  font-size: .78rem;
  color: var(--color-mid);
  text-align: center;
  margin-top: -.25rem;
}

.form-success {
  background: #f0fdf4;
  border: 1px solid #bbf7d0;
  border-radius: var(--radius-sm);
  color: #166534;
  font-size: .9rem;
  font-weight: 500;
  padding: .75rem 1rem;
  text-align: center;
}

/* ── FOOTER ─────────────────────────────────────────────────── */
.footer {
  background: var(--color-dark);
  color: rgba(255,255,255,.5);
  padding: var(--space-lg) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  text-align: center;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  margin-bottom: .25rem;
}

.footer__logo-icon {
  width: 26px;
  height: 26px;
  aspect-ratio: 1 / 1;
  object-fit: contain;
}

.footer__logo-image {
  width: auto;
  height: 24px;
  aspect-ratio: 6069 / 2585;
  object-fit: contain;
  filter: brightness(0) saturate(100%) invert(100%);
}

.footer__tagline { font-size: .85rem; }
.footer__copy    { font-size: .78rem; }

/* ════════════════════════════════════════════════════════════
   RESPONSIVE
   ════════════════════════════════════════════════════════════ */

@media (max-width: 960px) {
  .hero__inner       { grid-template-columns: 1fr; }
  .hero__visual      { justify-content: flex-start; margin-top: 2rem; }
  .chat-mock         { max-width: 100%; }
  .chat-mock__books  { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .chat-mock__book:nth-child(4) { display: none; }
  .chat-mock__thinking {
    width: 54%;
    left: 58%;
    top: 62%;
  }
  .problema__cards   { grid-template-columns: 1fr; }
  .beneficios__grid  { grid-template-columns: 1fr 1fr; }
  .caso-card__inner  { grid-template-columns: 1fr; }
  .contacto__inner   { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .nav__links        { display: none; }
  .nav__burger       { display: flex; }
  .nav__inner        { height: 66px; }
  .nav__logo-image   { height: 36px; }
  .chat-mock__brand-image { height: 30px; }
  .chat-mock__tagline { font-size: .66rem; }
  .chat-mock__bubble,
  .chat-mock__section-title,
  .chat-mock__input  { font-size: .78rem; }
  .chat-mock__books  { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .chat-mock__book:nth-child(3),
  .chat-mock__book:nth-child(4) { display: none; }
  .chat-mock__thinking { display: none; }
  .beneficios__grid  { grid-template-columns: 1fr; }
  .hero__ctas        { flex-direction: column; }
  .hero__ctas .btn   { width: 100%; }
  :root              { --space-2xl: 4rem; --space-xl: 2.5rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}