/*
* Traqueamento Avançado - Estilos CSS
* Desenvolvido para Rafael Gestor
* Otimizado para performance e SEO
*/

/* ===== Variáveis CSS ===== */
:root {
  /* Cores */
  --color-primary: #2e1a47;
  --color-secondary: #3d2a5a;
  --color-accent: #00e676;
  --color-accent-hover: #00c853;
  --color-secondary-accent: #ff4081;
  --color-text: #f8f9fa;
  --color-text-dark: #212529;
  --color-bg-light: #4b3a6b;
  --color-bg-lighter: #5d4a7d;
  --color-border: rgba(255, 255, 255, 0.1);

  /* Tipografia */
  --font-primary: 'Poppins', sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;

  /* Espaçamento */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;

  /* Bordas */
  --border-radius-sm: 0.25rem;
  --border-radius-md: 0.5rem;
  --border-radius-lg: 1rem;
  --border-radius-full: 9999px;

  /* Sombras */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1);

  /* Transições */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;

  /* Layout */
  --container-max-width: 1200px;
  --header-height: 80px;
}

/* ===== Reset e Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

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

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

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

ul, ol {
  list-style: none;
}

button, input, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

/* ===== Utilitários ===== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  border-radius: var(--border-radius-md);
  font-weight: 600;
  transition: all var(--transition-fast);
  text-align: center;
}

.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

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

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

.btn--secondary:hover {
  background-color: rgba(0, 230, 118, 0.1);
  transform: translateY(-2px);
}

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

.section__header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section__title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  position: relative;
  display: inline-block;
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background-color: var(--color-accent);
  border-radius: var(--border-radius-full);
}
/* =============================================== */
.badge {
  display: inline-block;
  padding: 0.5rem 1rem;
  background-color: rgba(255, 64, 129, 0.2); /* seu fundo */
  /* color: var(--color-secondary-accent); */
  color:#f8f9fa;
  /* color: var(--color-secondary-accent); */

  border-radius: var(--border-radius-full);
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-md);

  border: 3px solid transparent; /* cria a borda base */
  background-clip: padding-box;
  position: relative;
  z-index: 0;
  overflow: hidden;
}

.badge::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: inherit;
  padding: 3px; /* mesma largura da borda */
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary-accent), var(--color-accent));
  background-size: 300% 100%;
  animation: moveGradient 2s ease-in-out infinite alternate;
  z-index: -1;
  mask:
    linear-gradient(#fff 0 0) content-box,
    linear-gradient(#fff 0 0);
  mask-composite: exclude;
  -webkit-mask-composite: destination-out;
  box-sizing: border-box;
}

/* animação */
@keyframes moveGradient {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}


/* =============================================== */

/* ===== Header ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  background-color: rgba(46, 26, 71, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  transition: all var(--transition-normal);
}

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

.header__logo {
  height: 60px;
  display: flex;
  align-items: center;
}

.header__logo img {
  height: 100%;
  width: auto;
}

@media (max-width: 1024px) {
  .header__logo {
    display: none!important;
  }
}

.faq__answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq__item.active .faq__answer {
    max-height: 200px; /* Ajuste dependendo do tamanho do seu conteúdo */
    padding-top: 10px;
}


.header__nav {
  display: flex;
}

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

.nav__link {
  font-weight: 500;
  position: relative;
  padding: var(--spacing-xs) 0;
}

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

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

.header__toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 30px;
  height: 21px;
}

.header__toggle span {
  width: 100%;
  height: 3px;
  background-color: var(--color-text);
  border-radius: var(--border-radius-full);
  transition: all var(--transition-fast);
}

/* Header scroll state */
.header.scrolled {
  height: 70px;
  box-shadow: var(--shadow-md);
}

/* ===== Hero Section ===== */
.hero {
  padding: calc(var(--header-height) + var(--spacing-3xl)) 0 var(--spacing-3xl);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 100%;
  height: 100%;
  background-image: url('../images/hero-bg-pattern.svg');
  background-size: cover;
  opacity: 0.1;
  z-index: 0;
}

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.hero__title {
  font-size: var(--font-size-5xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(90deg, #ffffff, #00e676);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__subtitle {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
}

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

.hero__image {
  position: relative;
}

.hero__image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
}

.hero__image::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius-lg);
  z-index: -1;
}

/* ===== Solution Section ===== */
.solution {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-secondary);
}

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

.solution__image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.solution__subtitle {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

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

.problems__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-xl);
}

.problem__item {
  background-color: var(--color-bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-md);
  text-align: center;
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.problem__item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.problem__icon {
  width: 70px;
  height: 70px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
}

.problem__title {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

/* ===== Benefits Section ===== */
.benefits {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-primary);
}

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

.benefit__item {
  background-color: var(--color-bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-md);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.benefit__item:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
}

.benefit__icon {
  width: 80px;
  height: 80px;
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-full);
}

.benefit__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

.benefit__text {
  opacity: 0.9;
}

/* ===== Process Section ===== */
.process {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-secondary);
}

.process__steps {
  position: relative;
}

.process__steps::before {
  content: '';
  position: absolute;
  top: 0;
  left: 30px;
  width: 2px;
  height: 100%;
  background-color: var(--color-accent);
  opacity: 0.5;
}

.process__step {
  display: flex;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  position: relative;
}

.process__step:last-child {
  margin-bottom: 0;
}

.step__number {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: var(--color-primary);
  font-size: var(--font-size-xl);
  font-weight: 700;
  border-radius: var(--border-radius-full);
  z-index: 1;
}

.step__content {
  flex: 1;
  padding: var(--spacing-lg);
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius-md);
  transition: transform var(--transition-normal);
}

.process__step:hover .step__content {
  transform: translateX(10px);
}

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

/* ===== Cases Section ===== */
.cases {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-primary);
}

.cases__slider {
  overflow: hidden;
  width: 100%;
  position: relative;
}
.cases__slider > div {
  display: flex;
  flex-wrap: nowrap;
  width: 100%;
}

.case__item {
  flex: 0 0 100%;
  max-width: 100%;
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
}


.case__title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

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

.case__testimonial {
  background-color: var(--color-bg-lighter);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-md);
  position: relative;
}

.testimonial__text {
  font-style: italic;
  margin-bottom: var(--spacing-lg);
  position: relative;
  padding-left: var(--spacing-lg);
}

.testimonial__text::before {
  content: '"';
  position: absolute;
  top: -10px;
  left: -5px;
  font-size: 3rem;
  color: var(--color-accent);
  opacity: 0.5;
}

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

.author__image {
  width: 60px;
  height: 60px;
  border-radius: var(--border-radius-full);
  object-fit: cover;
}

.author__name {
  font-weight: 600;
  display: block;
}

.author__role {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

.cases__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: var(--spacing-xl);
  gap: var(--spacing-md);
}

.cases__prev,
.cases__next {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-full);
  background-color: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.cases__prev:hover,
.cases__next:hover {
  background-color: var(--color-accent);
  color: var(--color-primary);
}

.cases__prev::before,
.cases__next::before {
  content: '';
  width: 10px;
  height: 10px;
  border-top: 2px solid currentColor;
  border-right: 2px solid currentColor;
}

.cases__prev::before {
  transform: rotate(-135deg);
}

.cases__next::before {
  transform: rotate(45deg);
}

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

.cases__dot {
  width: 10px;
  height: 10px;
  border-radius: var(--border-radius-full);
  background-color: var(--color-bg-lighter);
  transition: all var(--transition-fast);
}

.cases__dot.active {
  background-color: var(--color-accent);
  width: 20px;
}

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

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

.faq__item {
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-md);
  overflow: hidden;
}

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

.faq__question h3 {
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.faq__icon {
  position: relative;
  width: 20px;
  height: 20px;
}

.faq__icon::before,
.faq__icon::after {
  content: '';
  position: absolute;
  background-color: var(--color-accent);
  transition: all var(--transition-fast);
}

.faq__icon::before {
  top: 50%;
  left: 0;
  width: 100%;
  height: 2px;
  transform: translateY(-50%);
}

.faq__icon::after {
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  transform: translateX(-50%);
}

.faq__item.active .faq__icon::after {
  transform: translateX(-50%) rotate(90deg);
  opacity: 0;
}

.faq__answer {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  padding: 0 var(--spacing-lg);
  transition: all 0.4s ease;
}

.faq__item.active .faq__answer {
  max-height: 300px; /* ajuste conforme o conteúdo real */
  opacity: 1;
  padding: var(--spacing-md) var(--spacing-lg);
}


.faq__item.active .faq__question {
  background-color: var(--color-bg-lighter);
}

/* ===== Expert Section ===== */
.expert {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-primary);
}

.expert__content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.expert__image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

.expert__name {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  color: var(--color-accent);
}

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

.expert__social {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.social__link {
  width: 40px;
  height: 40px;
  border-radius: var(--border-radius-full);
  background-color: var(--color-bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.social__link:hover {
  background-color: var(--color-accent);
  transform: translateY(-5px);
}

/* ===== Contact Section ===== */
.contact {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-secondary);
}

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

.pricing {
  background-color: var(--color-bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  position: relative;
  overflow: hidden;
}

.pricing::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary-accent), var(--color-accent));
  background-size: 300% 100%;
  animation: moveGradient 2s ease-in-out infinite alternate;
}

/* Animação */
@keyframes moveGradient {
  0% {
    background-position: 0% 50%;
  }
  100% {
    background-position: 100% 50%;
  }
}


.pricing__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.pricing__value {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  color: var(--color-accent);
  text-align: center;
  margin-bottom: var(--spacing-xs);
}

.pricing__note {
  text-align: center;
  opacity: 0.8;
  margin-bottom: var(--spacing-lg);
}

.pricing__subtitle {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
}

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

.pricing__features li {
  padding: var(--spacing-sm) 0;
  position: relative;
  padding-left: var(--spacing-xl);
}

.pricing__features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.pricing__guarantee {
  background-color: rgba(0, 230, 118, 0.1);
  padding: var(--spacing-md);
  border-radius: var(--border-radius-md);
  margin-bottom: var(--spacing-xl);
  font-size: var(--font-size-sm);
  border-left: 3px solid var(--color-accent);
}

.consultation {
  background-color: var(--color-bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
}

.consultation__title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

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

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.form__group {
  position: relative;
}

.form__group input {
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-bg-lighter);
  border-radius: var(--border-radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.form__group input:focus {
  box-shadow: 0 0 0 2px var(--color-accent);
}

.form__group input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

/* ======================= */

.form__group select {
  width: 100%;
  padding: var(--spacing-md);
  background-color: var(--color-bg-lighter);
  border-radius: var(--border-radius-md);
  color: var(--color-text);
  transition: all var(--transition-fast);
  appearance: none; /* Tira o estilo padrão do select do navegador */
  -webkit-appearance: none;
  -moz-appearance: none;
}

.form__group select:focus {
  box-shadow: 0 0 0 2px var(--color-accent);
}


/* ===== Platforms Section ===== */
.platforms {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-primary);
}

.platforms__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.platform__item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius-md);
  transition: all var(--transition-normal);
}

.platform__item:hover {
  transform: translateY(-10px);
  background-color: var(--color-bg-lighter);
}

.platforms__text {
  text-align: center;
  font-size: var(--font-size-lg);
  opacity: 0.9;
}

/* ===== Footer ===== */
.footer {
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
  background-color: var(--color-secondary);
  border-top: 1px solid var(--color-border);
}

.footer__content {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-2xl);
}

.footer__logo {
  margin-bottom: var(--spacing-md);
}

.footer__tagline {
  opacity: 0.8;
}

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

.footer__menu li,
.footer__info li {
  margin-bottom: var(--spacing-sm);
}

.footer__menu a:hover,
.footer__info a:hover {
  color: var(--color-accent);
}

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

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.footer__copyright {
  opacity: 0.8;
  font-size: var(--font-size-sm);
}

.footer__legal {
  display: flex;
  gap: var(--spacing-lg);
  font-size: var(--font-size-sm);
}

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

/* ===== Floating Elements ===== */
.whatsapp-button {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 60px;
  height: 60px;
  background-color: #25d366;
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 99;
  transition: all var(--transition-fast);
}

.whatsapp-button:hover {
  transform: scale(1.1);
}

.back-to-top {
  position: fixed;
  bottom: 20px;
  left: 20px;
  width: 50px;
  height: 50px;
  background-color: var(--color-accent);
  color: var(--color-primary);
  border-radius: var(--border-radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-5px);
}

/* ===== Animations ===== */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

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

/* ===== Media Queries ===== */
@media (max-width: 1200px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
  }

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

@media (max-width: 992px) {
  :root {
    --font-size-5xl: 2.25rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.5rem;
  }

  .hero .container,
  .solution__content,
  .benefits__grid,
  .expert__content,
  .contact__content {
    grid-template-columns: 1fr;
  }

  .hero__image {
    order: -1;
    margin-bottom: var(--spacing-xl);
  }

  .problems__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.5rem;
    --spacing-3xl: 3rem;
  }

  .header__nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: 0;
    background-color: var(--color-primary);
    overflow: hidden;
    transition: height var(--transition-normal);
    z-index: 999;
  }

  .header__nav.active {
    height: calc(100vh - var(--header-height));
  }

  .nav__list {
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-xl) 0;
  }

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

  .header__toggle {
    display: flex;
  }

  .header__toggle.active span:nth-child(1) {
    transform: translateY(9px) rotate(45deg);
  }

  .header__toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .header__toggle.active span:nth-child(3) {
    transform: translateY(-9px) rotate(-45deg);
  }

  .hero__cta {
    flex-direction: column;
  }

  .problems__grid {
    grid-template-columns: 1fr;
  }

  .platforms__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer__content {
    grid-template-columns: 1fr;
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--spacing-md);
    text-align: center;
  }
}

@media (max-width: 576px) {
  :root {
    --font-size-5xl: 1.75rem;
    --font-size-4xl: 1.5rem;
    --font-size-3xl: 1.25rem;
    --spacing-3xl: 2.5rem;
  }

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

  .platforms__grid {
    grid-template-columns: 1fr;
  }

  .footer__legal {
    flex-direction: column;
    gap: var(--spacing-md);
  }
}