/* ==========================================================================
   Titanes Granos — sitio institucional
   Hoja de estilos única. Tokens semánticos, mobile-first.
   ========================================================================== */

/* ---------- Tokens ---------- */
:root {
  /* Color — paleta del brief */
  --verde: #15803D;
  --verde-claro: #22C55E;
  --verde-oscuro: #166534;
  --dorado: #A16207;
  --navy: #0F172A;
  --piedra: #64748B;
  --fondo: #F0FDF4;
  --superficie: #FFFFFF;
  --borde: #BBF7D0;
  --borde-fuerte: #E2E8F0;
  --error: #DC2626;

  /* Derivados necesarios para AA sobre fondos teñidos (ver README) */
  --piedra-oscuro: #475569;
  --dorado-hover: #854D0E;
  --verde-hover: #166534;
  --footer-texto: #E2E8F0;
  --footer-suave: #94A3B8;

  /* Tipografía */
  --fuente-titulo: "Lexend", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --fuente-texto: "Source Sans 3", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;

  /* Espaciado (base 4) */
  --e-1: 4px;
  --e-2: 8px;
  --e-3: 12px;
  --e-4: 16px;
  --e-6: 24px;
  --e-8: 32px;
  --e-12: 48px;
  --e-16: 64px;
  --e-24: 96px;

  /* Formas y sombras */
  --radio: 8px;
  --radio-pill: 999px;
  --radio-input: 4px;
  --sombra-1: 0 1px 3px rgba(15, 23, 42, 0.08);
  --sombra-2: 0 8px 24px rgba(15, 23, 42, 0.12);

  /* Layout */
  --max: 1240px;
  --nav-h: 64px;
}

@media (min-width: 1100px) {
  :root {
    --nav-h: 76px;
  }
}

/* ---------- Base ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--fondo);
  color: var(--navy);
  font-family: var(--fuente-texto);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  text-rendering: optimizeLegibility;
}

main {
  flex: 1 0 auto;
}

.site-footer {
  margin-top: auto;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--fuente-titulo);
  color: var(--navy);
  margin: 0;
  text-wrap: balance;
}

p {
  margin: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: var(--verde);
}

[hidden] {
  display: none !important;
}

.container {
  width: 100%;
  max-width: var(--max);
  margin-inline: auto;
  padding-inline: 20px;
}

@media (min-width: 768px) {
  .container {
    padding-inline: 32px;
  }
}

/* ---------- Foco visible ---------- */
:focus-visible {
  outline: 3px solid var(--verde);
  outline-offset: 3px;
  border-radius: var(--radio-input);
}

.site-footer :focus-visible {
  outline-color: var(--borde);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 200;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--radio-pill);
  background-color: var(--superficie);
  color: var(--verde);
  font-weight: 600;
  text-decoration: none;
  box-shadow: var(--sombra-2);
  transition: top 0.18s ease-out;
}

.skip-link:focus {
  top: 16px;
}

/* ---------- Iconos ---------- */
.icon {
  width: 24px;
  height: 24px;
  flex: none;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon--sm {
  width: 16px;
  height: 16px;
}

/* ---------- Tipografía utilitaria ---------- */
.eyebrow {
  font-family: var(--fuente-texto);
  font-size: 0.75rem;
  font-weight: 600;
  line-height: 1.33;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--verde);
  margin-bottom: var(--e-3);
}

.section__title {
  font-size: clamp(1.75rem, 1.3rem + 1.4vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  max-width: 26ch;
}

.section__intro {
  margin-top: var(--e-4);
  font-size: 1.125rem;
  line-height: 1.55;
  color: var(--piedra-oscuro);
  max-width: 62ch;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--e-2);
  min-height: 44px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: var(--radio-pill);
  font-family: var(--fuente-texto);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.25;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.18s ease-out, color 0.18s ease-out,
    border-color 0.18s ease-out, box-shadow 0.18s ease-out;
}

.btn--lg {
  min-height: 52px;
  padding: 14px 28px;
}

/* CTA unitario del sitio: acción de conversión (dorado cosecha) */
.btn--primary {
  background-color: var(--dorado);
  border-color: var(--dorado);
  color: #FFFFFF;
  box-shadow: var(--sombra-1);
}

.btn--primary:hover {
  background-color: var(--dorado-hover);
  border-color: var(--dorado-hover);
}

/* Acción de marca en la barra de navegación */
.btn--brand {
  background-color: var(--verde);
  border-color: var(--verde);
  color: #FFFFFF;
}

.btn--brand:hover {
  background-color: var(--verde-hover);
  border-color: var(--verde-hover);
}

.btn--secondary {
  background-color: var(--superficie);
  border-color: var(--verde);
  color: var(--verde);
}

.btn--secondary:hover {
  background-color: var(--fondo);
}

.btn--ghost {
  background-color: var(--superficie);
  border-color: var(--piedra);
  color: var(--navy);
}

.btn--ghost:hover {
  border-color: var(--navy);
}

/* ---------- Enlace con flecha ---------- */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--e-2);
  min-height: 44px;
  padding-block: 8px;
  color: var(--verde);
  font-weight: 600;
  text-decoration: none;
  text-underline-offset: 4px;
}

.link-arrow .icon {
  transition: transform 0.18s ease-out;
}

.link-arrow:hover {
  text-decoration: underline;
}

.link-arrow:hover .icon {
  transform: translateX(2px);
}

/* ==========================================================================
   Header / navegación
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--superficie);
  border-bottom: 1px solid var(--borde);
  transition: box-shadow 0.2s ease-out;
}

.site-header.is-scrolled {
  box-shadow: var(--sombra-1);
}

.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--e-4);
  min-height: var(--nav-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--e-3);
  min-height: 44px;
  text-decoration: none;
  color: var(--navy);
}

.brand__mark {
  display: block;
  width: 30px;
  height: 30px;
  flex: none;
}

.brand__name {
  font-family: var(--fuente-titulo);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand__name-soft {
  color: var(--verde);
}

.brand--footer {
  color: var(--superficie);
}

.brand--footer .brand__name-soft {
  color: var(--borde);
}

/* Botón hamburguesa */
.nav-toggle {
  display: inline-flex;
  align-items: center;
  gap: var(--e-2);
  min-width: 44px;
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid var(--piedra);
  border-radius: var(--radio-pill);
  background-color: var(--superficie);
  color: var(--navy);
  font-family: var(--fuente-texto);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
}

.nav-toggle:hover {
  border-color: var(--navy);
}

.nav-toggle__close {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__open {
  display: none;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__close {
  display: block;
}

/* Navegación móvil */
.nav {
  display: none;
}

.nav.is-open {
  display: flex;
  flex-direction: column;
  gap: var(--e-4);
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  max-height: calc(100dvh - var(--nav-h));
  overflow-y: auto;
  padding: var(--e-4) 20px var(--e-6);
  background-color: var(--superficie);
  border-bottom: 1px solid var(--borde);
  box-shadow: var(--sombra-2);
  animation: nav-in 0.18s ease-out;
}

@keyframes nav-in {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.nav__list {
  display: flex;
  flex-direction: column;
}

.nav__link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding-block: var(--e-2);
  color: var(--navy);
  font-size: 1rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid var(--borde-fuerte);
}

.nav__link:hover {
  color: var(--verde);
}

/* Navegación escritorio */
@media (min-width: 1100px) {
  .nav-toggle {
    display: none;
  }

  .nav,
  .nav.is-open {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--e-6);
    position: static;
    padding: 0;
    background: none;
    border: 0;
    box-shadow: none;
    animation: none;
    max-height: none;
    overflow: visible;
    margin-left: auto;
  }

  .nav__list {
    flex-direction: row;
    gap: var(--e-6);
  }

  .nav__link {
    min-height: 44px;
    border-bottom: 0;
    padding-block: 0;
    text-underline-offset: 6px;
    white-space: nowrap;
  }

  .nav__link:hover {
    text-decoration: underline;
    text-decoration-color: var(--verde-claro);
    text-decoration-thickness: 2px;
  }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  background-color: var(--superficie);
  padding-block: var(--e-8) var(--e-12);
}

.hero__grid {
  display: grid;
  gap: var(--e-8);
}

.hero__title {
  font-size: clamp(2rem, 1.15rem + 3.4vw, 3rem);
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.02em;
  max-width: 24ch;
}

.hero__lead {
  margin-top: var(--e-4);
  font-size: 1.125rem;
  line-height: 1.6;
  color: var(--piedra-oscuro);
  max-width: 54ch;
}

.hero__actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: var(--e-3);
  margin-top: var(--e-6);
}

.trustbar {
  display: grid;
  gap: var(--e-4) var(--e-6);
  margin-top: var(--e-8);
  padding-top: var(--e-6);
  border-top: 1px solid var(--borde);
}

.trustbar__item {
  display: flex;
  align-items: flex-start;
  gap: var(--e-3);
}

.trustbar__icon {
  color: var(--verde);
  margin-top: 2px;
}

.trustbar__text {
  font-size: 0.875rem;
  line-height: 1.43;
  color: var(--piedra-oscuro);
}

.trustbar__text strong {
  display: block;
  font-family: var(--fuente-titulo);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--navy);
  font-variant-numeric: tabular-nums;
}

.hero__media {
  order: -1;
}

.illustration,
.mockup {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radio);
}

.illustration {
  max-width: 560px;
  margin-inline: auto;
}

@media (min-width: 480px) {
  .trustbar {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 600px) {
  .hero__actions {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
  }
}

@media (min-width: 1040px) {
  .hero {
    padding-block: var(--e-12) var(--e-16);
  }

  .hero__grid {
    grid-template-columns: 1.02fr 0.98fr;
    align-items: center;
    gap: var(--e-16);
  }

  .hero__media {
    order: 0;
  }
}

/* ==========================================================================
   Secciones
   ========================================================================== */
.section {
  padding-block: var(--e-12);
  scroll-margin-top: calc(var(--nav-h) + 8px);
}

.section--plain {
  background-color: var(--superficie);
}

.section__head {
  margin-bottom: var(--e-8);
}

.about {
  display: grid;
  gap: var(--e-4) var(--e-8);
  max-width: 80ch;
}

.about p {
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--piedra-oscuro);
}

@media (min-width: 760px) {
  .about {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

@media (min-width: 1040px) {
  .section {
    padding-block: var(--e-24);
  }

  .section__head {
    margin-bottom: var(--e-12);
  }
}

/* ---------- Tarjetas de servicios ---------- */
.cards {
  display: grid;
  gap: var(--e-4);
}

.card {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--e-3);
  padding: var(--e-6);
  background-color: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  box-shadow: var(--sombra-1);
  transition: border-color 0.2s ease-out, box-shadow 0.2s ease-out,
    transform 0.2s ease-out;
}

.card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radio);
  background-color: var(--fondo);
  color: var(--verde);
}

.card__title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
}

.card__text {
  font-size: 1rem;
  line-height: 1.5;
  color: var(--piedra-oscuro);
  max-width: 46ch;
}

.card .link-arrow {
  margin-top: auto;
}

.cards__more {
  margin-top: var(--e-6);
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--piedra);
}

@media (hover: hover) {
  .card:hover {
    border-color: var(--verde-claro);
    box-shadow: var(--sombra-2);
    transform: translateY(-2px);
  }
}

@media (min-width: 768px) {
  .cards {
    grid-template-columns: 1fr 1fr;
    gap: var(--e-6);
  }
}

@media (min-width: 1040px) {
  .card {
    padding: var(--e-8);
  }
}

/* ---------- Proceso ---------- */
.steps {
  display: grid;
  gap: var(--e-8);
}

.step {
  padding-top: var(--e-4);
  border-top: 2px solid var(--borde);
}

.step__num {
  display: block;
  margin-bottom: var(--e-2);
  font-family: var(--fuente-titulo);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--dorado);
  font-variant-numeric: tabular-nums;
}

.step__title {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
}

.step__text {
  margin-top: var(--e-2);
  font-size: 1rem;
  line-height: 1.5;
  color: var(--piedra-oscuro);
  max-width: 58ch;
}

@media (min-width: 900px) {
  .steps {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--e-6);
  }
}

/* ---------- Confianza y calidad ---------- */
.trust {
  display: grid;
  gap: var(--e-4);
}

.trust__item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--e-3);
  padding: var(--e-6);
  background-color: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  box-shadow: var(--sombra-1);
}

.trust__item--accent {
  border-color: var(--verde-claro);
  box-shadow: var(--sombra-2);
}

.badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--e-2);
  margin-top: auto;
  padding-top: var(--e-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 6px 14px;
  border-radius: var(--radio-pill);
  background-color: var(--fondo);
  border: 1px solid var(--borde);
  color: var(--verde-oscuro);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.43;
}

.badge--soft {
  background-color: #F1F5F9;
  border-color: var(--borde-fuerte);
  color: var(--piedra-oscuro);
  font-weight: 500;
}

@media (min-width: 640px) {
  .trust {
    grid-template-columns: 1fr 1fr;
  }

  .trust__item--accent {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1040px) {
  .trust {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--e-6);
  }

  .trust__item--accent {
    grid-column: auto;
  }

  .trust__item {
    padding: var(--e-8);
  }
}

/* ---------- Cifras ---------- */
.stats {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--e-6) var(--e-4);
  padding-bottom: var(--e-8);
}

.stat {
  padding-left: var(--e-4);
  border-left: 2px solid var(--borde);
}

.stat__value {
  font-family: var(--fuente-titulo);
  font-size: clamp(1.25rem, 1.05rem + 1.2vw, 2.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--verde);
  font-variant-numeric: tabular-nums;
  overflow-wrap: break-word;
  text-wrap: balance;
}

.stat__label {
  margin-top: var(--e-2);
  font-size: 0.875rem;
  line-height: 1.43;
  color: var(--piedra);
}

@media (min-width: 400px) {
  .stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1040px) {
  .stats {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--e-6);
  }

  .stat__label {
    font-size: 1rem;
    line-height: 1.5;
  }
}

/* ---------- Franja de clientes ---------- */
.clients {
  padding: var(--e-6);
  border-radius: var(--radio);
  background-color: var(--borde-fuerte);
}

.clients__label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--piedra-oscuro);
  text-align: center;
}

.clients__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--e-3);
  margin-top: var(--e-4);
}

.clients__item {
  display: grid;
  place-items: center;
  height: 64px;
  padding: var(--e-2);
  border-radius: var(--radio);
  background-color: var(--superficie);
  box-shadow: var(--sombra-1);
  color: var(--piedra);
  font-size: 0.75rem;
  line-height: 1.33;
  letter-spacing: 0.04em;
  text-align: center;
  filter: grayscale(1);
}

@media (min-width: 600px) {
  .clients {
    padding: var(--e-8);
  }

  .clients__list {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 1040px) {
  .clients__list {
    grid-template-columns: repeat(6, 1fr);
  }
}

/* ---------- Tarjeta simple (404) ---------- */
.contact__card {
  padding: var(--e-6);
  background-color: var(--superficie);
  border: 1px solid var(--borde);
  border-radius: var(--radio);
  box-shadow: var(--sombra-1);
}

@media (min-width: 900px) {
  .contact__card {
    padding: var(--e-8);
  }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background-color: var(--navy);
  color: var(--footer-texto);
  padding-top: var(--e-12);
}

.footer__top {
  padding-bottom: var(--e-6);
}

.footer__brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--e-2);
}

.footer__grid {
  display: grid;
  gap: var(--e-8);
  padding-top: var(--e-8);
  padding-bottom: var(--e-12);
  border-top: 1px solid rgba(226, 232, 240, 0.16);
}

.footer__text {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--footer-suave);
  max-width: 40ch;
}

.footer__title {
  font-family: var(--fuente-titulo);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.5;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--borde);
}

.footer__list {
  display: grid;
  gap: 2px;
  margin-top: var(--e-3);
}

.footer__list--plain li {
  padding-block: var(--e-2);
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--footer-texto);
}

.footer__link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-block: 10px;
  color: var(--footer-texto);
  font-size: 0.9375rem;
  text-decoration: none;
  text-underline-offset: 4px;
}

.footer__link:hover {
  color: var(--borde);
  text-decoration: underline;
}

.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--e-2);
  padding-block: var(--e-6);
  border-top: 1px solid rgba(226, 232, 240, 0.16);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--footer-suave);
}

@media (min-width: 600px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1040px) {
  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--e-6);
    padding-bottom: var(--e-16);
    max-width: 48rem;
  }
}

/* ==========================================================================
   Revelado progresivo (respeta prefers-reduced-motion)
   ========================================================================== */
.js .reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease-out, transform 0.45s ease-out;
}

.js .reveal.is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal,
  .js .reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}