/* =========================================================
   CONFIRMA ONLINE — Estilos principales
   Mobile-first, CSS variables, sin dependencias externas
   ========================================================= */

/* ---------------------------------------------------------
   1. VARIABLES Y RESET
   --------------------------------------------------------- */
:root {
  /* Paleta */
  --color-sage:         #7a9e87;      /* verde salvia */
  --color-sage-dark:    #5c7d68;      /* sage oscuro para hover */
  --color-sage-light:   #a8c4b0;      /* sage claro */
  --color-sage-pale:    #e8f0ea;      /* sage muy claro, fondos */
  --color-cream:        #f9f5ef;      /* crema principal */
  --color-cream-dark:   #ede7db;      /* crema más oscura */
  --color-gold:         #c9a84c;      /* dorado */
  --color-gold-light:   #e2c97e;      /* dorado claro */
  --color-text:         #2e3830;      /* texto oscuro */
  --color-text-muted:   #5a6b5d;      /* texto secundario */
  --color-white:        #ffffff;

  /* Tipografía */
  --font-logo:     'Alex Brush', cursive;
  --font-heading:  'Bodoni Moda', serif;
  --font-body:     'Josefin Sans', sans-serif;

  /* Tamaños de fuente (fluid) */
  --fs-xs:   0.75rem;
  --fs-sm:   0.875rem;
  --fs-base: 1rem;
  --fs-md:   1.125rem;
  --fs-lg:   1.5rem;
  --fs-xl:   2rem;
  --fs-2xl:  2.75rem;
  --fs-3xl:  3.5rem;

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

  /* Radios */
  --radius-sm:   4px;
  --radius-md:   10px;
  --radius-lg:   20px;
  --radius-full: 999px;

  /* Sombras */
  --shadow-sm: 0 2px 8px rgba(46, 56, 48, 0.07);
  --shadow-md: 0 6px 24px rgba(46, 56, 48, 0.12);
  --shadow-lg: 0 12px 40px rgba(46, 56, 48, 0.16);

  /* Transiciones */
  --transition: 0.25s ease;

  /* Layout */
  --max-width: 1100px;
  --header-height: 68px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: 300;
  color: var(--color-text);
  background-color: var(--color-cream);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

ul, ol {
  list-style: none;
}

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

/* ---------------------------------------------------------
   2. UTILIDADES
   --------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-md);
}

.section__title {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-text);
  text-align: center;
  line-height: 1.25;
  margin-bottom: var(--space-xs);
}

.section__subtitle {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--space-lg);
  max-width: 520px;
  margin-inline: auto;
  margin-bottom: var(--space-lg);
}

/* ---------------------------------------------------------
   3. BOTONES
   --------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), box-shadow var(--transition),
              transform var(--transition);
}

.btn--primary {
  background-color: var(--color-sage);
  color: var(--color-white);
  border-color: var(--color-sage);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-sage-dark);
  border-color: var(--color-sage-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--large {
  padding: 1rem 2.5rem;
  font-size: var(--fs-base);
}

/* ---------------------------------------------------------
   4. LOGO
   --------------------------------------------------------- */
.logo {
  font-family: var(--font-logo);
  font-size: 1.75rem;
  color: var(--color-sage-dark);
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

.logo:hover {
  color: var(--color-gold);
}

/* ---------------------------------------------------------
   5. HEADER
   --------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(249, 245, 239, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-cream-dark);
  height: var(--header-height);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

/* Nav desktop */
.nav__list {
  display: none; /* oculto en mobile */
  align-items: center;
  gap: var(--space-md);
}

.nav__link {
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

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

.nav__cta {
  font-size: var(--fs-sm);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 400;
  color: var(--color-sage-dark);
  border: 1.5px solid var(--color-sage);
  border-radius: var(--radius-full);
  padding: 0.45rem 1.1rem;
  transition: background-color var(--transition), color var(--transition);
}

.nav__cta:hover {
  background-color: var(--color-sage);
  color: var(--color-white);
}

/* Hamburguesa */
.nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: var(--radius-full);
  transition: transform var(--transition), opacity var(--transition);
}

/* Estado abierto */
.nav__toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}
.nav__toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Menú mobile desplegado */
.nav--open .nav__list {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: var(--header-height);
  left: 0;
  right: 0;
  background-color: var(--color-cream);
  border-bottom: 1px solid var(--color-cream-dark);
  padding: var(--space-md) var(--space-md) var(--space-lg);
  gap: var(--space-sm);
  align-items: flex-start;
  box-shadow: var(--shadow-md);
}

/* ---------------------------------------------------------
   6. HERO
   --------------------------------------------------------- */
.hero {
  position: relative;
  background: linear-gradient(160deg, var(--color-cream) 55%, var(--color-sage-pale) 100%);
  padding: var(--space-2xl) 0 var(--space-xl);
  overflow: hidden;
  text-align: center;
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.hero__badge {
  display: inline-block;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gold);
  border: 1px solid var(--color-gold-light);
  border-radius: var(--radius-full);
  padding: 0.3rem 0.9rem;
  background-color: rgba(201, 168, 76, 0.06);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text);
  max-width: 700px;
}

.hero__title em {
  font-style: italic;
  color: var(--color-sage-dark);
}

.hero__subtitle {
  font-size: var(--fs-md);
  color: var(--color-text-muted);
  max-width: 540px;
  line-height: 1.75;
}

/* Ornamentos decorativos */
.hero__decoration {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero__ornament {
  position: absolute;
  font-size: 6rem;
  color: var(--color-sage-light);
  opacity: 0.25;
  line-height: 1;
}

.hero__ornament--left {
  bottom: -1rem;
  left: -1rem;
  transform: rotate(180deg);
}

.hero__ornament--right {
  top: 2rem;
  right: -1rem;
}

/* ---------------------------------------------------------
   7. FEATURES
   --------------------------------------------------------- */
.features {
  padding: var(--space-2xl) 0;
  background-color: var(--color-white);
}

.features__grid {
  display: grid;
  gap: var(--space-md);
}

.card {
  background-color: var(--color-cream);
  border: 1px solid var(--color-cream-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  transition: box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

.card__icon {
  font-size: 1.75rem;
  color: var(--color-gold);
  margin-bottom: var(--space-sm);
}

.card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
  line-height: 1.3;
}

.card__text {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ---------------------------------------------------------
   8. CASOS DE USO
   --------------------------------------------------------- */
.use-cases {
  padding: var(--space-2xl) 0;
  background-color: var(--color-sage-pale);
}

.use-cases__list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
}

.use-case {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-sm);
  border: 1px solid var(--color-cream-dark);
  transition: box-shadow var(--transition), transform var(--transition);
}

.use-case:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

.use-case__icon {
  font-size: 2.25rem;
}

.use-case__label {
  font-family: var(--font-heading);
  font-size: var(--fs-base);
  font-weight: 400;
  color: var(--color-text);
  text-align: center;
}

/* ---------------------------------------------------------
   9. CÓMO FUNCIONA
   --------------------------------------------------------- */
.how-it-works {
  padding: var(--space-2xl) 0;
  background-color: var(--color-white);
}

.steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: 680px;
  margin-inline: auto;
}

.step {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.step__number {
  flex-shrink: 0;
  font-family: var(--font-heading);
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: var(--color-cream-dark);
  line-height: 1;
  width: 56px;
  text-align: right;
  padding-top: 0.1rem;
}

.step__content {
  border-left: 2px solid var(--color-gold-light);
  padding-left: var(--space-md);
}

.step__title {
  font-family: var(--font-heading);
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.step__text {
  font-size: var(--fs-base);
  color: var(--color-text-muted);
  line-height: 1.75;
}

/* ---------------------------------------------------------
   10. CTA FINAL
   --------------------------------------------------------- */
.cta-section {
  padding: var(--space-2xl) 0;
  background: linear-gradient(135deg, var(--color-sage-dark) 0%, var(--color-sage) 100%);
  text-align: center;
}

.cta-section__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.cta-section__title {
  font-family: var(--font-heading);
  font-size: var(--fs-xl);
  font-weight: 600;
  color: var(--color-white);
  line-height: 1.25;
}

.cta-section__text {
  font-size: var(--fs-md);
  color: rgba(255, 255, 255, 0.82);
  max-width: 480px;
  line-height: 1.75;
}

.cta-section .btn--primary {
  background-color: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-text);
}

.cta-section .btn--primary:hover {
  background-color: var(--color-gold-light);
  border-color: var(--color-gold-light);
}

/* ---------------------------------------------------------
   11. FOOTER
   --------------------------------------------------------- */
.footer {
  background-color: var(--color-text);
  padding: var(--space-xl) 0;
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  text-align: center;
}

.footer__logo {
  color: var(--color-cream);
  font-size: 2rem;
}

.footer__logo:hover {
  color: var(--color-gold-light);
}

.footer__tagline {
  font-family: var(--font-heading);
  font-style: italic;
  font-size: var(--fs-base);
  color: var(--color-sage-light);
  opacity: 0.85;
}

.footer__copy {
  font-size: var(--fs-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.06em;
  opacity: 0.7;
}

/* ---------------------------------------------------------
   12. RESPONSIVE — Tablet (≥ 640px)
   --------------------------------------------------------- */
@media (min-width: 640px) {

  .hero__title {
    font-size: var(--fs-3xl);
  }

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

  .use-cases__list {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ---------------------------------------------------------
   13. RESPONSIVE — Desktop (≥ 900px)
   --------------------------------------------------------- */
@media (min-width: 900px) {

  /* Nav desktop visible, toggle oculto */
  .nav__list {
    display: flex;
  }

  .nav__toggle {
    display: none;
  }

  .section__title {
    font-size: var(--fs-2xl);
  }

  .hero {
    padding: 8rem 0 6rem;
  }

  .steps {
    gap: var(--space-xl);
  }

  .step__number {
    font-size: var(--fs-3xl);
    width: 72px;
  }
}