/* ========================================
   ARCHIVO: styles.css
   PROPÓSITO: Estilos profesionales y responsivos para Next Move Ajedrez
   ======================================== */

/* ==================== VARIABLES CSS ==================== */
:root {
  /* Colores principales */
  --color-primary: #001F3F;
  --color-accent: #FF6B35;
  --color-white: #FFFFFF;
  --color-text-primary: #111111;
  --color-text-secondary: #555555;
  --color-bg-light: #F2F2F2;
  
  /* Tipografía */
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  /* Espaciado */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 4rem;
  
  /* Sombras */
  --shadow-sm: 0 2px 8px rgba(0, 31, 63, 0.1);
  --shadow-md: 0 4px 16px rgba(0, 31, 63, 0.15);
  --shadow-lg: 0 8px 32px rgba(0, 31, 63, 0.2);
  
  /* Transiciones */
  --transition: all 0.3s ease;
  
  /* Bordes */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
}

/* ==================== RESET Y BASE ==================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-primary);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

ul {
  list-style: none;
}

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

/* ==================== UTILIDADES ==================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

.section__title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary);
}

.section__subtitle {
  text-align: center;
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.highlight {
  color: var(--color-accent);
}

/* ==================== BOTONES ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 0.875rem 1.75rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  text-align: center;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  background-color: #e55a28;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

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

.btn-large {
  padding: 1.125rem 2.25rem;
  font-size: 1.125rem;
}

/* ==================== HEADER / NAVEGACIÓN ==================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  transition: var(--transition);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.logo-icon {
  font-size: 2rem;
  color: var(--color-accent);
}

.nav__list {
  display: flex;
  gap: var(--spacing-md);
}

.nav__link {
  font-weight: 500;
  color: var(--color-text-primary);
  position: relative;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: var(--transition);
}

.nav__link:hover::after,
.nav__link.active::after {
  width: 100%;
}

.nav__toggle,
.nav__close {
  display: none;
  font-size: 1.5rem;
  color: var(--color-primary);
}

/* ==================== WHATSAPP FLOTANTE ==================== */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 60px;
  height: 60px;
  background-color: #25D366;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  transition: var(--transition);
  animation: pulse 2s infinite;
}

.whatsapp-float:hover {
  transform: scale(1.1);
  box-shadow: 0 8px 32px rgba(37, 211, 102, 0.4);
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

/* ==================== HERO SECTION ==================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #003366 100%);
  padding: var(--spacing-xl) 0;
  margin-top: 80px;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.hero__content {
  color: var(--color-white);
}

.hero__title {
  font-family: var(--font-heading);
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

.hero__subtitle {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-md);
  opacity: 0.9;
  line-height: 1.7;
}

.hero__buttons {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.hero__image {
  position: relative;
}

.hero__img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-bg-light);
  min-height: 400px;
  object-fit: cover;
}

/* ==================== WHY SECTION ==================== */
.why-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-white);
}

.why__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.why__card {
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  transition: var(--transition);
  text-align: center;
}

.why__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.why__icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, var(--color-accent) 0%, #ff8c5a 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--spacing-sm);
  font-size: 2rem;
  color: var(--color-white);
}

.why__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.why__text {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ==================== RESULTS SECTION ==================== */
.results-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-light);
}

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.testimonial__card {
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.testimonial__card:hover {
  box-shadow: var(--shadow-md);
}

.testimonial__image {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-sm);
}

.testimonial__img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  background-color: var(--color-bg-light);
}

.testimonial__text {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
  font-style: italic;
}

.testimonial__author {
  text-align: center;
}

.testimonial__name {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}

.testimonial__role {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.stat__card {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  text-align: center;
  transition: var(--transition);
}

.stat__card:hover {
  transform: translateY(-4px);
}

.stat__icon {
  font-size: 2.5rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.stat__number {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.stat__text {
  font-size: 1rem;
  opacity: 0.9;
}

/* ==================== METHODOLOGY SECTION ==================== */
.methodology-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-white);
}

.methodology__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.method__card {
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: var(--transition);
}

.method__card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.method__number {
  position: absolute;
  top: -20px;
  right: 20px;
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.2;
}

.method__icon {
  width: 70px;
  height: 70px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  font-size: 1.75rem;
  color: var(--color-white);
}

.method__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.method__text {
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ==================== PLANS SECTION ==================== */
.plans-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-light);
}

.plans__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-md);
}

.plan__card {
  background-color: var(--color-white);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  text-align: center;
  position: relative;
  transition: var(--transition);
}

.plan__card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.plan__current {
  border: 3px solid var(--color-accent);
}

.plan__badge {
  position: absolute;
  top: -15px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 0.5rem 1.5rem;
  border-radius: 20px;
  font-weight: 600;
  font-size: 0.9rem;
}

.plan__icon {
  width: 70px;
  height: 70px;
  background-color: var(--color-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: var(--spacing-sm) auto;
  font-size: 1.75rem;
  color: var(--color-white);
}

.plan__title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
}

.plan__schedule {
  font-size: 1.25rem;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.plan__description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

/* ==================== ACADEMY SECTION ==================== */
.academy-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-white);
}

.academy__content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.academy__description {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-sm);
}

.instructor__card {
  background-color: var(--color-bg-light);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
}

.instructor__image {
  width: 150px;
  height: 150px;
  margin: 0 auto var(--spacing-sm);
}

.instructor__img {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid var(--color-accent);
  background-color: var(--color-white);
}

.instructor__name {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: 0.25rem;
}

.instructor__title {
  text-align: center;
  color: var(--color-accent);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.instructor__achievement {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-start;
  background-color: var(--color-white);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  margin-top: var(--spacing-sm);
}

.instructor__achievement i {
  color: var(--color-accent);
  font-size: 1.5rem;
  flex-shrink: 0;
}

.instructor__achievement p {
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ==================== FAQ SECTION ==================== */
.faq-section {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-light);
}

.faq__container {
  max-width: 800px;
  margin: 0 auto;
}

.faq__item {
  background-color: var(--color-white);
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq__question {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-primary);
  text-align: left;
  transition: var(--transition);
}

.faq__question:hover {
  background-color: var(--color-bg-light);
}

.faq__question i {
  color: var(--color-accent);
  transition: var(--transition);
  font-size: 1rem;
}

.faq__item.active .faq__question i {
  transform: rotate(180deg);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq__item.active .faq__answer {
  max-height: 500px;
}

.faq__answer p {
  padding: 0 var(--spacing-md) var(--spacing-sm);
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ==================== OFFER SECTION ==================== */
.offer-section {
  padding: var(--spacing-xl) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #003366 100%);
}

.offer__card {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  position: relative;
}

.offer__badge {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-accent);
  color: var(--color-white);
  padding: 0.75rem 2rem;
  border-radius: 30px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  box-shadow: var(--shadow-md);
}

.offer__badge i {
  font-size: 1.25rem;
}

.offer__title {
  font-family: var(--font-heading);
  font-size: 2rem;
  color: var(--color-primary);
  margin-top: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.offer__subtitle {
  font-size: 1.5rem;
  color: var(--color-accent);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.offer__includes {
  text-align: left;
  margin: var(--spacing-md) 0;
}

.offer__includes-title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.offer__list {
  list-style: none;
}

.offer__list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.offer__list i {
  color: var(--color-accent);
  font-size: 1.25rem;
  flex-shrink: 0;
}

.offer__note {
  margin-top: var(--spacing-sm);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-style: italic;
}

/* ==================== FINAL CTA ==================== */
.final-cta {
  padding: var(--spacing-xl) 0;
  background-color: var(--color-bg-light);
}

.final-cta__content {
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.final-cta__title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.final-cta__subtitle {
  font-size: 1.25rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

/* ==================== FOOTER ==================== */
.footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.footer__description {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}

.footer__social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer__social a {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.footer__social a:hover {
  background-color: var(--color-accent);
  transform: translateY(-3px);
}

.footer__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

.footer__links,
.footer__contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.footer__links a,
.footer__contact a {
  color: rgba(255, 255, 255, 0.8);
  transition: var(--transition);
}

.footer__links a:hover,
.footer__contact a:hover {
  color: var(--color-accent);
  padding-left: 5px;
}

.footer__contact li {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: rgba(255, 255, 255, 0.8);
}

.footer__contact i {
  color: var(--color-accent);
  font-size: 1.125rem;
}

.footer__bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.6);
}

/* ==================== SCROLL TO TOP ==================== */
.scroll-top {
  position: fixed;
  bottom: 100px;
  right: 30px;
  width: 50px;
  height: 50px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 998;
}

.scroll-top.show {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  background-color: var(--color-accent);
  transform: translateY(-4px);
}

/* ==================== ANIMACIONES ==================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* ==================== RESPONSIVE ==================== */
@media screen and (max-width: 1024px) {
  .hero__title {
    font-size: 2.5rem;
  }
  
  .section__title {
    font-size: 2rem;
  }
  
  .academy__content {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 768px) {
  /* Navegación móvil */
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100%;
    background-color: var(--color-white);
    padding: var(--spacing-lg) var(--spacing-md);
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
  }
  
  .nav__menu.show-menu {
    right: 0;
  }
  
  .nav__list {
    flex-direction: column;
    gap: var(--spacing-md);
  }
  
  .nav__toggle,
  .nav__close {
    display: block;
  }
  
  .nav__close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
  }
  
  /* Hero */
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero__title {
    font-size: 2rem;
  }
  
  .hero__subtitle {
    font-size: 1.125rem;
  }
  
  .hero__buttons {
    justify-content: center;
  }
  
  .hero__image {
    order: -1;
  }
  
  /* Botones */
  .btn {
    font-size: 0.9rem;
    padding: 0.75rem 1.5rem;
  }
  
  .btn-large {
    font-size: 1rem;
    padding: 1rem 2rem;
  }
  
  /* Secciones */
  .section__title {
    font-size: 1.75rem;
  }
  
  .section__subtitle {
    font-size: 1rem;
  }
  
  /* WhatsApp flotante */
  .whatsapp-float {
    width: 50px;
    height: 50px;
    font-size: 1.75rem;
    bottom: 20px;
    right: 20px;
  }
  
  /* Scroll to top */
  .scroll-top {
    bottom: 80px;
    right: 20px;
    width: 45px;
    height: 45px;
  }
  
  /* Grids */
  .why__grid,
  .testimonials__grid,
  .methodology__grid,
  .plans__grid,
  .stats__grid {
    grid-template-columns: 1fr;
  }
  
  /* Footer */
  .footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer__social {
    justify-content: center;
  }
  
  .footer__links,
  .footer__contact {
    align-items: center;
  }
}

@media screen and (max-width: 480px) {
  :root {
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
  }
  
  .hero__title {
    font-size: 1.75rem;
  }
  
  .section__title {
    font-size: 1.5rem;
  }
  
  .offer__title {
    font-size: 1.5rem;
  }
  
  .final-cta__title {
    font-size: 1.75rem;
  }
  
  .btn {
    width: 100%;
    justify-content: center;
  }
}