/* ===== VARIABLES ===== */
:root {
  /* Colors */
  --primary-color: #3b82f6;
  --primary-light: #60a5fa;
  --primary-dark: #1d4ed8;
  --secondary-color: #06b6d4;
  --secondary-light: #22d3ee;
  --accent-color: #25d366;
  --text-color: #ffffff;
  --text-light: #d1d5db;
  --text-muted: #9ca3af;
  --white: #ffffff;
  --black: #000000;
  --gray-50: #1a1a1a;
  --gray-100: #262626;
  --gray-200: #404040;
  --gray-300: #525252;
  --gray-800: #1f2937;
  --gray-900: #111827;
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  --gradient-secondary: linear-gradient(135deg, var(--secondary-color) 0%, var(--secondary-light) 100%);
  
  /* Typography */
  --font-primary: 'Montserrat', sans-serif;
  --font-secondary: 'Open Sans', sans-serif;
  
  /* Font Sizes */
  --fs-xs: 0.75rem;
  --fs-sm: 0.875rem;
  --fs-base: 1rem;
  --fs-lg: 1.125rem;
  --fs-xl: 1.25rem;
  --fs-2xl: 1.5rem;
  --fs-3xl: 1.875rem;
  --fs-4xl: 2.25rem;
  --fs-5xl: 3rem;
  --fs-6xl: 3.75rem;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;
  
  /* Border Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  
  /* Transitions */
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.3s ease-in-out;
  --transition-slow: 0.5s ease-in-out;
  
  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-secondary);
  font-size: var(--fs-base);
  color: var(--text-color);
  line-height: 1.6;
  background-color: var(--black);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-color);
}

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

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

ul {
  list-style: none;
}

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

.section {
  padding: var(--spacing-3xl) 0;
}

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section__title {
  font-size: var(--fs-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.section__subtitle {
  font-size: var(--fs-lg);
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

.text-gradient {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-primary);
  font-size: var(--fs-sm);
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  text-decoration: none;
  white-space: nowrap;
}

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

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

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

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

.btn--large {
  padding: var(--spacing-md) var(--spacing-lg);
  font-size: var(--fs-base);
}

.btn--full {
  width: 100%;
}

/* ===== HEADER ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 90px;
  padding: 0 var(--spacing-lg);
}

.nav__logo-img {
  height: 60px;
  width: auto;
  filter: brightness(1.1);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.nav__link {
  font-family: var(--font-primary);
  font-weight: 500;
  color: var(--text-color);
  transition: color var(--transition-fast);
}

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

.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.nav__toggle,
.nav__close {
  display: none;
  font-size: var(--fs-xl);
  cursor: pointer;
  color: var(--text-color);
}

/* ===== HERO ===== */
.hero {
  padding-top: 180px;
  padding-bottom: var(--spacing-3xl);
  background: linear-gradient(135deg, var(--black) 0%, var(--gray-900) 100%);
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.hero__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.hero__title {
  font-size: var(--fs-5xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.1;
}

.hero__description {
  font-size: var(--fs-lg);
  color: var(--text-light);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
}

.hero__actions {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.hero__trust {
  display: flex;
  gap: var(--spacing-lg);
  flex-wrap: wrap;
}

.trust__item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: var(--fs-sm);
  color: var(--text-light);
}

.trust__item i {
  color: var(--accent-color);
}

.hero__image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero__crypto-visual {
  position: relative;
  width: 300px;
  height: 300px;
}

.crypto-card {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 140px;
  height: 140px;
  background: transparent;
  border-radius: var(--radius-2xl);
  transition: transform var(--transition-normal);
}

.crypto-card:hover {
  transform: translateY(-10px);
}

.crypto-card .crypto-icon {
  width: 100px;
  height: 100px;
  margin-bottom: var(--spacing-xs);
  transition: transform var(--transition-normal);
}

.crypto-card:hover .crypto-icon {
  transform: scale(1.1);
}

.crypto-card span {
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--white);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  margin-top: var(--spacing-xs);
}

.crypto-card--bitcoin {
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

.crypto-card--ethereum {
  bottom: 0;
  left: 0;
}

.crypto-card--usdt {
  bottom: 0;
  right: 0;
}

/* ===== ABOUT ===== */
.about {
  background: var(--gray-900);
  padding: var(--spacing-3xl) 0;
}

.about__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  text-align: center;
}

.about__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.about__text {
  font-size: var(--fs-lg);
  color: var(--text-light);
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.about__features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  justify-items: center;
}

@media (max-width: 768px) {
  .about__features {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
}

.feature {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: 0;
  background: transparent;
  border-radius: 0;
  transition: transform var(--transition-normal);
  border: none;
  text-align: center;
  max-width: 280px;
}

.feature:hover {
  transform: translateY(-5px);
}

.feature__icon {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  color: var(--white);
  font-size: var(--fs-3xl);
  margin: 0 auto var(--spacing-sm) auto;
}

.feature__title {
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.feature__description {
  color: var(--text-light);
  font-size: var(--fs-base);
  line-height: 1.6;
  max-width: 280px;
}

.about__location {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-xl);
  font-size: var(--fs-base);
  color: var(--text-light);
}

.about__location i {
  color: var(--primary-color);
}

/* ===== SERVICES ===== */
.services {
  background: var(--black);
  padding: var(--spacing-3xl) 0;
}

.services__container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: var(--spacing-3xl);
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.service-card {
  position: relative;
  background: var(--gray-900);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-2xl);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transition: transform var(--transition-normal);
  border: 1px solid var(--gray-200);
}

.service-card:hover {
  transform: translateY(-15px);
  border-color: var(--primary-color);
  box-shadow: 0 35px 60px -12px rgba(59, 130, 246, 0.3);
}

.service-card--featured {
  border: 2px solid var(--primary-color);
}

.service-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gradient-primary);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
  font-size: var(--fs-sm);
  font-weight: 600;
}

.service-card__header {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.service-card__icon {
  flex-shrink: 0;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: var(--white);
  font-size: var(--fs-2xl);
}

.service-card__title {
  font-size: var(--fs-2xl);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  color: var(--text-color);
}

.service-card__subtitle {
  font-size: var(--fs-base);
  color: var(--text-light);
}

.service-card__description {
  font-size: var(--fs-base);
  color: var(--text-light);
  margin-bottom: var(--spacing-lg);
  line-height: 1.6;
}

.service-card__features {
  margin-bottom: var(--spacing-lg);
}

.service-card__features li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
  font-size: var(--fs-base);
  color: var(--text-color);
}

.service-card__features i {
  color: var(--accent-color);
  font-size: var(--fs-sm);
}

.service-card__volume {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-sm);
  background: var(--gray-50);
  border-radius: var(--radius-md);
  font-size: var(--fs-sm);
  color: var(--text-light);
}

.service-card__volume i {
  color: var(--primary-color);
}

/* ===== CRYPTOS ===== */
.cryptos {
  background: var(--gray-900);
  padding: var(--spacing-3xl) 0;
}

.cryptos__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.cryptos__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-2xl);
  text-align: center;
  justify-items: center;
  place-items: center;
}

.crypto-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0;
  background: transparent;
  border-radius: 0;
  transition: all var(--transition-normal);
  border: none;
  text-align: center;
  max-width: 150px;
}

.crypto-item:hover {
  transform: translateY(-8px);
}

.crypto-item__icon-img {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md) auto;
  transition: transform var(--transition-normal);
}

.crypto-item__icon {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  color: var(--white);
  font-size: var(--fs-3xl);
  margin: 0 auto var(--spacing-md) auto;
}

.crypto-item__name {
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-color);
}

.crypto-item__symbol {
  font-size: var(--fs-base);
  color: var(--text-light);
  font-weight: 500;
}

.cryptos__cta {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
}

.cryptos__cta p {
  font-size: var(--fs-lg);
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

/* ===== WHATSAPP FLOAT ===== */
.whatsapp-float {
  position: fixed;
  bottom: 30px;
  right: 30px;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: var(--accent-color);
  color: var(--white);
  padding: var(--spacing-md);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  z-index: var(--z-fixed);
  transition: all var(--transition-normal);
  text-decoration: none;
}

.whatsapp-float:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 50px -12px rgba(37, 211, 102, 0.5);
}

.whatsapp-float i {
  font-size: var(--fs-2xl);
}

.whatsapp-float__text {
  font-family: var(--font-primary);
  font-weight: 600;
  font-size: var(--fs-sm);
}

/* ===== RESPONSIVE ===== */
@media screen and (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero__crypto-visual {
    width: 250px;
    height: 250px;
  }
  
  .crypto-card {
    width: 100px;
    height: 100px;
  }
  
  .crypto-card i {
    font-size: var(--fs-2xl);
  }
  
  .services__container {
    grid-template-columns: 1fr;
    max-width: 500px;
  }
}

@media screen and (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: rgba(0, 0, 0, 0.98);
    backdrop-filter: blur(20px);
    padding: var(--spacing-3xl) var(--spacing-md);
    transition: right var(--transition-normal);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
  
  .nav__menu.show-menu {
    right: 0;
  }
  
  .nav__list {
    flex-direction: column;
    gap: var(--spacing-xl);
    text-align: center;
  }
  
  .nav__link {
    font-size: var(--fs-xl);
    color: var(--white);
    font-weight: 600;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition-fast);
  }
  
  .nav__link:hover {
    color: var(--primary-color);
    transform: translateX(10px);
  }
  
  .nav__close {
    display: block;
    position: absolute;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    font-size: var(--fs-2xl);
    color: var(--white);
    z-index: 1001;
  }
  
  .nav__toggle {
    display: block;
    color: var(--white);
  }
  
  .nav__actions .btn {
    display: none;
  }
  
  .section__title {
    font-size: var(--fs-3xl);
  }
  
  .hero {
    padding-top: 120px;
  }
  
  .hero__title {
    font-size: var(--fs-4xl);
  }
  
  .hero__actions {
    flex-direction: column;
    align-items: center;
  }
  
  .hero__trust {
    justify-content: center;
  }
  
  .about__features {
    grid-template-columns: 1fr;
  }
  
  .feature {
    flex-direction: column;
    text-align: center;
  }
  
  .cryptos__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .whatsapp-float__text {
    display: none;
  }
  
  .whatsapp-float {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    justify-content: center;
  }
}

@media screen and (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }
  
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .hero__title {
    font-size: var(--fs-3xl);
  }
  
  .hero__actions .btn {
    width: 100%;
  }
  
  .trust__item {
    font-size: var(--fs-xs);
  }
  
  .service-card {
    padding: var(--spacing-lg);
  }
  
  .services__container {
    grid-template-columns: 1fr;
  }
  
  .cryptos__grid {
    grid-template-columns: 1fr;
  }
}


/* ===== HOW IT WORKS ===== */
.how-it-works {
  background: var(--black);
  padding: var(--spacing-3xl) 0;
}

.how-it-works .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.steps__container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-3xl);
  margin-bottom: var(--spacing-xl);
  justify-items: center;
  place-items: center;
}

.step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--spacing-2xl);
  background: var(--gray-900);
  border-radius: var(--radius-2xl);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  transition: transform var(--transition-normal);
  border: 1px solid var(--gray-200);
  max-width: 350px;
  width: 100%;
}

.step:hover {
  transform: translateY(-15px);
  border-color: var(--primary-color);
  box-shadow: 0 35px 60px -12px rgba(59, 130, 246, 0.3);
}

.step__number {
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  color: var(--white);
  border-radius: 50%;
  font-family: var(--font-primary);
  font-weight: 700;
  font-size: var(--fs-lg);
}

.step__icon {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  color: var(--white);
  font-size: var(--fs-3xl);
  margin: 0 auto var(--spacing-lg) auto;
}

.step__title {
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.step__description {
  color: var(--text-light);
  line-height: 1.6;
}

.steps__cta {
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* ===== DIFFERENTIALS ===== */
.differentials {
  background: var(--gray-900);
  padding: var(--spacing-3xl) 0;
}

.differentials .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.differentials__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-2xl);
  text-align: center;
  justify-items: center;
  place-items: center;
}

.differential {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-md);
  padding: 0;
  background: transparent;
  border-radius: 0;
  transition: all var(--transition-normal);
  border: none;
  text-align: center;
  max-width: 280px;
}

.differential:hover {
  transform: translateY(-8px);
}

.differential__icon {
  width: 80px;
  height: 80px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-2xl);
  color: var(--white);
  font-size: var(--fs-3xl);
  margin: 0 auto var(--spacing-sm) auto;
}

.differential__title {
  font-size: var(--fs-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-color);
}

.differential__description {
  color: var(--text-light);
  line-height: 1.6;
  max-width: 280px;
}

/* ===== FAQ ===== */
.faq {
  background: var(--black);
  padding: var(--spacing-3xl) 0;
}

.faq .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.faq__container {
  max-width: 800px;
  margin: 0 auto var(--spacing-xl);
}

.faq__item {
  background: var(--gray-900);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
  overflow: hidden;
  border: 1px solid var(--gray-200);
}

.faq__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-lg);
  cursor: pointer;
  transition: background-color var(--transition-fast);
  background: transparent;
}

.faq__question:hover {
  background: rgba(59, 130, 246, 0.1);
}

.faq__question h3 {
  color: var(--text-color);
  font-size: var(--fs-lg);
  font-weight: 600;
  margin: 0;
}

.faq__question i {
  color: var(--primary-color);
  font-size: var(--fs-lg);
  transition: transform var(--transition-normal);
}

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

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  background: var(--gray-800);
}

.faq__item.active .faq__answer {
  max-height: 300px;
}

/* ===== CONTACT ===== */
.contact {
  background: var(--gray-900);
  padding: var(--spacing-3xl) 0;
}

.contact .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.contact__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  max-width: 1000px;
  margin: 0 auto;
}

.contact__form {
  background: var(--gray-900);
  padding: var(--spacing-2xl);
  border-radius: var(--radius-2xl);
  border: 1px solid var(--gray-200);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-normal);
  padding-top: var(--spacing-lg);
}

.faq__item.active .faq__answer {
  max-height: 300px;
}

.faq__answer p {
  padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg);
  color: var(--text-light);
  line-height: 1.6;
  margin: 0;
}

.faq__cta {
  text-align: center;
}

.faq__cta p {
  font-size: var(--fs-lg);
  color: var(--text-light);
  margin-bottom: var(--spacing-md);
}

/* ===== CONTACT ===== */
.contact {
  background: var(--black);
  padding: var(--spacing-3xl) 0;
}

.contact__container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  max-width: 1000px;
  margin: 0 auto;
}

.contact__form {
  background: var(--gray-50);
  padding: var(--spacing-xl);
  border-radius: var(--radius-2xl);
}

.form__group {
  margin-bottom: var(--spacing-lg);
}

.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.form__label {
  display: block;
  font-family: var(--font-primary);
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: var(--spacing-xs);
}

.form__input,
.form__select,
.form__textarea {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  font-family: var(--font-secondary);
  font-size: var(--fs-base);
  color: var(--text-color);
  background: var(--white);
  transition: border-color var(--transition-fast);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.form__textarea {
  resize: vertical;
  min-height: 100px;
}

.contact__info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

.contact__methods {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.contact__method {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--gray-900);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-200);
}

.contact__method-icon {
  flex-shrink: 0;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-primary);
  border-radius: var(--radius-lg);
  color: var(--white);
  font-size: var(--fs-xl);
}

.contact__method-content h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-color);
}

.contact__method-content p {
  color: var(--text-light);
  margin-bottom: var(--spacing-xs);
}

.contact__method-content a {
  color: var(--primary-color);
  font-weight: 500;
  text-decoration: underline;
}

.contact__details {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
}

.contact__detail {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.contact__detail i {
  color: var(--primary-color);
  font-size: var(--fs-lg);
  margin-top: 2px;
}

.contact__detail strong {
  display: block;
  font-family: var(--font-primary);
  font-weight: 600;
  color: var(--text-color);
  margin-bottom: var(--spacing-xs);
}

.contact__detail p {
  color: var(--text-light);
  font-size: var(--fs-sm);
  line-height: 1.4;
}

/* ===== FOOTER ===== */
.footer {
  background: var(--gray-900);
  color: var(--white);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer__content {
  margin-bottom: var(--spacing-xl);
}

.footer__main {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
}

.footer__logo {
  height: 60px;
  width: auto;
  margin-bottom: var(--spacing-md);
}

.footer__description {
  color: var(--white);
  line-height: 1.6;
  max-width: 300px;
}

.footer__title {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--white);
}

.footer__details p {
  color: var(--white);
  margin-bottom: var(--spacing-xs);
}

.footer__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__list a {
  color: var(--white);
  transition: color var(--transition-fast);
}

.footer__list a:hover {
  color: var(--primary-color);
}

.footer__contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer__contact-info p {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--white);
}

.footer__contact-info i {
  color: var(--primary-light);
  width: 16px;
}

.footer__bottom {
  border-top: 1px solid var(--gray-800);
  padding-top: var(--spacing-lg);
}

.footer__legal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer__legal p {
  color: var(--white);
  font-size: var(--fs-sm);
}

.footer__legal-links {
  display: flex;
  gap: var(--spacing-lg);
}

.footer__legal-links a {
  color: var(--gray-200);
  font-size: var(--fs-sm);
  transition: color var(--transition-fast);
}

.footer__legal-links a:hover {
  color: var(--white);
}

/* ===== RESPONSIVE DESIGN ===== */
@media screen and (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .hero__container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-xl);
  }
  
  .hero__crypto-visual {
    width: 250px;
    height: 250px;
    margin: 0 auto;
  }
  
  .crypto-card {
    width: 100px;
    height: 100px;
  }
  
  .crypto-card img {
    width: 60px;
    height: 60px;
  }
  
  .services__container {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }
  
  .about__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cryptos__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .steps__container {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin: 0 auto var(--spacing-xl);
  }
  
  .differentials__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .contact__container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }
  
  .footer__main {
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
  }
}

@media screen and (max-width: 768px) {
  .nav__menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background: var(--black);
    padding: var(--spacing-3xl) var(--spacing-md);
    transition: right var(--transition-normal);
    z-index: 1000;
  }
  
  .nav__menu.show-menu {
    right: 0;
  }
  
  .nav__list {
    flex-direction: column;
    gap: var(--spacing-xl);
  }
  
  .nav__link {
    font-size: var(--fs-lg);
    color: var(--white);
  }
  
  .nav__close {
    display: block;
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    color: var(--white);
    font-size: var(--fs-2xl);
    cursor: pointer;
  }
  
  .nav__toggle {
    display: block;
    color: var(--white);
    font-size: var(--fs-xl);
    cursor: pointer;
  }
  
  .hero__title {
    font-size: var(--fs-3xl);
  }
  
  .hero__subtitle {
    font-size: var(--fs-lg);
  }
  
  .about__grid {
    grid-template-columns: 1fr;
  }
  
  .cryptos__grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .differentials__grid {
    grid-template-columns: 1fr;
  }
  
  .form__row {
    grid-template-columns: 1fr;
  }
  
  .contact__methods {
    gap: var(--spacing-md);
  }
  
  .contact__method {
    padding: var(--spacing-md);
  }
  
  .footer__main {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer__legal {
    flex-direction: column;
    text-align: center;
  }
  
  .whatsapp-float__text {
    display: none;
  }
  
  .whatsapp-float {
    padding: var(--spacing-md);
  }
}

@media screen and (max-width: 480px) {
  .section {
    padding: var(--spacing-2xl) 0;
  }
  
  .hero {
    padding: calc(var(--spacing-3xl) + var(--spacing-xl)) 0 var(--spacing-2xl);
  }
  
  .hero__content {
    margin-top: calc(var(--spacing-xl) + var(--spacing-lg));
  }
  
  .hero__title {
    font-size: var(--fs-2xl);
    margin-bottom: var(--spacing-lg);
  }
  
  .hero__subtitle {
    font-size: var(--fs-base);
  }
  
  .hero__crypto-visual {
    width: 200px;
    height: 200px;
  }
  
  .crypto-card {
    width: 80px;
    height: 80px;
  }
  
  .crypto-card img {
    width: 50px;
    height: 50px;
  }
  
  .service-card {
    padding: var(--spacing-lg);
  }
  
  .cryptos__grid {
    grid-template-columns: 1fr;
    max-width: 200px;
    margin: 0 auto;
  }
  
  .step {
    padding: var(--spacing-lg);
  }
  
  .step__icon {
    width: 60px;
    height: 60px;
    font-size: var(--fs-2xl);
  }
  
  .differential {
    padding: var(--spacing-lg);
  }
  
  .differential__icon {
    width: 60px;
    height: 60px;
    font-size: var(--fs-2xl);
  }
  
  .contact__form {
    padding: var(--spacing-lg);
  }
  
  .faq__question {
    padding: var(--spacing-md);
  }
  
  .faq__question h3 {
    font-size: var(--fs-base);
  }
  
  .faq__answer {
    padding-top: var(--spacing-lg);
  }
  
  .faq__answer p {
    padding: var(--spacing-md) var(--spacing-md) var(--spacing-lg);
    font-size: var(--fs-sm);
    line-height: 1.6;
  }
  
  .footer__main {
    grid-template-columns: 1fr;
    text-align: left;
    gap: var(--spacing-lg);
  }
  
  .footer__logo {
    margin: 0 auto var(--spacing-md) auto;
    display: block;
  }
  
  .footer__description {
    text-align: center;
    margin: 0 auto var(--spacing-lg) auto;
  }
  
  .footer__section {
    text-align: center;
  }
  
  .footer__title {
    text-align: center;
    margin-bottom: var(--spacing-md);
  }
  
  .footer__details,
  .footer__contact-info {
    text-align: center;
  }
  
  .footer__legal {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
}


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

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

@keyframes float {
  0%, 100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes gradient {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* ===== SCROLL HEADER ===== */
.scroll-header {
  background: rgba(0, 0, 0, 0.98);
  box-shadow: 0 4px 20px rgba(59, 130, 246, 0.1);
  border-bottom: 1px solid var(--primary-color);
}

/* ===== LOADING STATES ===== */
.loaded .hero__title {
  animation: fadeInUp 0.8s ease-out;
}

.loaded .hero__description {
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.loaded .hero__actions {
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.loaded .hero__trust {
  animation: fadeInUp 0.8s ease-out 0.6s both;
}

.loaded .hero__crypto-visual {
  animation: fadeInRight 0.8s ease-out 0.3s both;
}

/* ===== ANIMATE IN ===== */
.animate-in {
  animation: fadeInUp 0.6s ease-out;
}

/* ===== FLOATING CRYPTO CARDS ===== */
.float-animation {
  animation: float 3s ease-in-out infinite;
}

.crypto-card--bitcoin.float-animation {
  animation-delay: 0s;
}

.crypto-card--ethereum.float-animation {
  animation-delay: 1s;
}

.crypto-card--usdt.float-animation {
  animation-delay: 2s;
}

/* ===== GRADIENT ANIMATIONS ===== */
.text-gradient {
  background-size: 200% 200%;
  animation: gradient 3s ease infinite;
}

.btn--primary {
  background-size: 200% 200%;
  animation: gradient 3s ease infinite;
}

/* ===== HOVER EFFECTS ===== */
.service-card:hover .service-card__icon {
  transform: scale(1.1);
}

.crypto-item:hover .crypto-item__icon {
  transform: scale(1.1) rotate(5deg);
}

.step:hover .step__icon {
  transform: scale(1.1);
}

.differential:hover .differential__icon {
  transform: scale(1.1) rotate(-5deg);
}

.feature:hover .feature__icon {
  transform: scale(1.1);
}

/* ===== FOCUS STATES ===== */
.btn:focus,
.nav__link:focus,
.faq__question:focus {
  outline: 2px solid var(--primary-color);
  outline-offset: 2px;
}

/* ===== SELECTION ===== */
::selection {
  background: var(--primary-color);
  color: var(--white);
}

::-moz-selection {
  background: var(--primary-color);
  color: var(--white);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--primary-color);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* ===== IMPROVED MOBILE MENU ===== */
@media screen and (max-width: 768px) {
  .nav__menu {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
  }
  
  .nav__list {
    padding-top: var(--spacing-2xl);
  }
  
  .nav__link {
    font-size: var(--fs-xl);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--gray-200);
    width: 100%;
    text-align: center;
  }
  
  .nav__link:hover {
    background: var(--gray-50);
  }
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== HIGH CONTRAST MODE ===== */
@media (prefers-contrast: high) {
  :root {
    --text-color: #000000;
    --text-light: #333333;
    --primary-color: #0000ff;
    --secondary-color: #008080;
  }
}

/* ===== PRINT STYLES ===== */
@media print {
  .header,
  .whatsapp-float,
  .nav__toggle,
  .nav__close {
    display: none !important;
  }
  
  .section {
    page-break-inside: avoid;
  }
  
  .hero {
    padding-top: var(--spacing-lg);
  }
  
  body {
    font-size: 12pt;
    line-height: 1.4;
  }
  
  h1, h2, h3 {
    page-break-after: avoid;
  }
}

/* ===== LOADING SPINNER ===== */
.loading {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--gray-200);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ===== FORM IMPROVEMENTS ===== */
.form__input:invalid {
  border-color: #ef4444;
}

.form__input:valid {
  border-color: var(--accent-color);
}

.form__error {
  color: #ef4444;
  font-size: var(--fs-sm);
  margin-top: var(--spacing-xs);
  display: none;
}

.form__success {
  color: var(--accent-color);
  font-size: var(--fs-sm);
  margin-top: var(--spacing-xs);
  display: none;
}

/* ===== TOOLTIP ===== */
.tooltip {
  position: relative;
  cursor: help;
}

.tooltip::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gray-900);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-size: var(--fs-xs);
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  z-index: var(--z-tooltip);
}

.tooltip:hover::before {
  opacity: 1;
}

/* ===== SKELETON LOADING ===== */
.skeleton {
  background: linear-gradient(90deg, var(--gray-200) 25%, var(--gray-100) 50%, var(--gray-200) 75%);
  background-size: 200% 100%;
  animation: loading 1.5s infinite;
}

@keyframes loading {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

/* ===== ENHANCED WHATSAPP BUTTON ===== */
.whatsapp-float {
  animation: pulse 2s infinite;
}

.whatsapp-float::before {
  content: '';
  position: absolute;
  top: -5px;
  left: -5px;
  right: -5px;
  bottom: -5px;
  background: var(--accent-color);
  border-radius: inherit;
  opacity: 0.3;
  animation: pulse 2s infinite;
  z-index: -1;
}

/* ===== IMPROVED CARDS ===== */
.service-card,
.crypto-item,
.step,
.differential,
.feature {
  transition: all var(--transition-normal);
  will-change: transform;
}

.service-card:hover,
.crypto-item:hover,
.step:hover,
.differential:hover,
.feature:hover {
  will-change: auto;
}

/* ===== PERFORMANCE OPTIMIZATIONS ===== */
.hero__crypto-visual,
.crypto-card {
  will-change: transform;
}

.loaded .hero__crypto-visual,
.loaded .crypto-card {
  will-change: auto;
}

/* ===== DARK MODE SUPPORT (Future) ===== */
@media (prefers-color-scheme: dark) {
  /* Dark mode styles can be added here in the future */
}

/* ===== FINAL RESPONSIVE ADJUSTMENTS ===== */
@media screen and (max-width: 320px) {
  .container {
    padding: 0 var(--spacing-xs);
  }
  
  .hero__title {
    font-size: var(--fs-2xl);
  }
  
  .section__title {
    font-size: var(--fs-2xl);
  }
  
  .btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--fs-xs);
  }
  
  .whatsapp-float {
    bottom: 20px;
    right: 20px;
    width: 50px;
    height: 50px;
  }
}