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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: #000;
  color: #fff;
  overflow-x: hidden;
}

/* ==========================
   HEADER
========================== */
header {
  padding: 24px 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  transition: background 0.3s ease, border-color 0.3s ease;
  background: transparent;
  border-bottom: 1px solid transparent;
  z-index: 100;
}

header.scrolled {
  backdrop-filter: blur(10px);
  background: rgba(10, 10, 10, 0.8);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.logo {
  font-family: 'Unbounded', sans-serif;
  font-size: 24px;
  font-weight: 700;
  background: linear-gradient(135deg, #0ea5e9, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-link {
  text-decoration: none;
  color: inherit;
}

nav {
  display: flex;
  gap: 40px;
}

nav a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 15px;
  transition: color 0.3s;
}

nav a:hover {
  color: #06b6d4;
}

/* ==========================
   HERO SECTION
========================== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 100px 20px 60px;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(14,165,233,0.15) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(80px);
  z-index: 0;
}

.hero-content {
  max-width: 900px;
  position: relative;
  z-index: 1;
}

h1 {
  font-family: 'Unbounded', sans-serif;
  font-size: 72px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.subtitle {
  font-size: 20px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 48px;
  line-height: 1.6;
}

/* ==========================
   BUTTON
========================== */
.subscribe-button {
  position: relative;
  overflow: hidden;
  text-align: center;
  text-transform: uppercase;
  font-weight: 500;
  font-family: 'Unbounded', sans-serif;
  transition: background 0.3s;
  background: #0ea5e9;
  color: #fff;
  border: 1px solid #0ea5e9;
  cursor: pointer;
  padding: 24px 64px;
  border-radius: 24px;
  font-size: 15px;
  letter-spacing: 0.5px;
}

.subscribe-button:hover {
  background: rgba(14,165,233,0.8);
}

.subscribe-button::before {
  content: '';
  position: absolute;
  inset: 0;
  width: 128px;
  height: 128px;
  background: radial-gradient(circle, rgba(255,255,255,0.6) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
  left: var(--mouse-x, 50%);
  top: var(--mouse-y, 50%);
  transform: translate(-50%, -50%);
  backdrop-filter: blur(8px);
}

.subscribe-button:hover::before {
  opacity: 1;
}

.subscribe-button .text {
  position: relative;
  z-index: 10;
}

/* ==========================
   FEATURES SECTION
========================== */
.features {
  padding: 100px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 48px;
  text-align: center;
  margin-bottom: 80px;
  font-weight: 600;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 40px;
  max-width: 1400px;
  margin: 0 auto;
}

.feature-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 40px 32px;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  height: 100%;
  min-height: 320px;
}

.feature-card:hover {
  background: rgba(255,255,255,0.04);
  border-color: rgba(14,165,233,0.3);
}

.feature-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg,#0ea5e9,#06b6d4);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 24px;
}

.feature-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 20px;
  margin-bottom: 12px;
  font-weight: 600;
}

.feature-description {
  color: rgba(255,255,255,0.65);
  line-height: 1.7;
  font-size: 15px;
}

/* ==========================
   PRICING SECTION
========================== */
.pricing {
  padding: 100px 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: rgba(255,255,255,0.03);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 20px;
  padding: 40px 32px;
  transition: all 0.3s;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.pricing-card:hover {
  background: rgba(255,255,255,0.04);
  border-color: rgba(14,165,233,0.3);
}

.pricing-title {
  font-family: 'Unbounded', sans-serif;
  font-size: 24px;
  margin-bottom: 16px;
  font-weight: 700;
}

.pricing-price {
  font-size: 32px;
  margin-bottom: 24px;
  font-weight: 700;
  background: linear-gradient(135deg, #fff, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.pricing-card ul {
  list-style: none;
  padding: 0;
  margin: 0 auto;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.pricing-card ul li {
  color: rgba(255,255,255,0.8);
  font-size: 16px;
  line-height: 1.6;
}

/* ==========================
   ABOUT SECTION
========================== */
.about {
  padding: 100px 40px;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
  background: transparent;
  border-radius: 0;
  position: relative;
}

.about-content p {
  font-size: 18px;
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
  margin-bottom: 24px;
}

.about::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 600px;
  height: 400px;
  background: radial-gradient(circle, rgba(14,165,233,0.05) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  border-radius: 50%;
  z-index: 0;
  pointer-events: none;
}

.about-content {
  position: relative;
  z-index: 1;
}

/* ==========================
   CTA SECTION
========================== */
.cta {
  padding: 100px 40px;
  text-align: center;
  position: relative;
}

.cta::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 400px;
  background: radial-gradient(circle, rgba(14,165,233,0.1) 0%, transparent 70%);
  border-radius: 50%;
  filter: blur(100px);
}

.cta-content {
  position: relative;
  z-index: 1;
}

.cta h2 {
  font-family: 'Unbounded', sans-serif;
  font-size: 56px;
  margin-bottom: 24px;
  font-weight: 700;
}

.cta p {
  font-size: 20px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 48px;
}

/* ==========================
   FOOTER
========================== */
footer {
  padding: 60px 40px;
  border-top: 1px solid rgba(255,255,255,0.05);
  text-align: center;
  color: rgba(255,255,255,0.4);
}

.footer-links {
  margin-top: 20px;
  display: flex;
  justify-content: center;
  gap: 24px;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: #06b6d4;
}

/* ==========================
   RESPONSIVE
========================== */
@media (max-width: 992px) {
  .features-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  nav { display: none; }
  h1 { font-size: 42px; }
  .section-title,
  .cta h2 { font-size: 36px; }
}

/* ==========================
   LEGAL PAGES (TERMS & PRIVACY)
========================== */
main {
  max-width: 900px;
  margin: 140px auto 80px;
  padding: 0 24px;
  line-height: 1.8;
}

main h1 {
  font-family: 'Unbounded', sans-serif;
  font-size: 42px;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

main h2 {
  font-family: 'Unbounded', sans-serif;
  font-size: 24px;
  margin-top: 40px;
  margin-bottom: 16px;
  color: #fff;
}

main p,
main ul li {
  font-size: 17px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 16px;
}

main ul {
  margin-left: 24px;
  list-style: disc;
}

.back-link {
  display: inline-block;
  margin-bottom: 40px;
  font-size: 16px;
  color: #06b6d4;
  text-decoration: none;
  transition: opacity 0.3s;
}

.back-link:hover {
  opacity: 0.7;
}

main a {
  color: #06b6d4;
  text-decoration: rgba(255,255,255,0.3);
  transition: color 0.3s, text-decoration-color 0.3s;
}

main a:hover {
  color: #0ea5e9;
  text-decoration-color: rgba(14,165,233,0.8);
}

/* ====== Карусель обновлений ====== */
.updates-carousel {
  width: 100%;
  overflow: hidden;
  padding: 50px 0;
  position: relative;
}

.updates-track {
  display: flex;
  gap: 40px;
  align-items: center;
  transition: transform 0.35s ease;
  /* Центрируем первую карточку по середине экрана */
  padding-left: calc(50% - 250px); /* половина ширины карточки */
}

.update-card {
  flex-shrink: 0;
  width: 500px; /* фиксированная ширина */
  height: 380px; /* фиксированная высота */
  transition: transform 0.35s ease, opacity 0.35s ease;
  transform: scale(0.85);
  opacity: 0.55;
}

.update-card:hover {
  background: rgba(255,255,255,0.04);
  border-color: rgba(14,165,233,0.3);
}

/* центральная карточка увеличена */
.update-card.active {
  transform: scale(1);
  opacity: 1;
}

@media (max-width: 768px) {
  .updates-track {
    padding-left: calc(50% - 70%);
  }
  .update-card {
    width: 85%;
    height: auto; /* подстраивается под экран */
  }
}

/* Мобильная версия */
@media (max-width: 768px) {
  
  /* Хедер */
  header nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
  }

  /* Hero */
  .hero-content h1 {
    font-size: 24px;
  }
  .hero-content p.subtitle {
    font-size: 16px;
  }
  .hero-content button.subscribe-button {
    width: 80%;
  }

  /* Features */
  .features-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }

  /* Updates carousel */
  .updates-carousel {
    overflow-x: auto;
  }
  .updates-track {
    display: flex;
    gap: 20px;
  }
  .update-card {
    min-width: 250px; /* карточка с v1.1.0 по центру */
  }

  /* Pricing */
  .pricing-grid {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: center;
  }
  .pricing-card {
    width: 90%;
    text-align: center;
  }

  /* CTA */
  .cta-content h2 {
    font-size: 22px;
  }
  .cta-content p {
    font-size: 16px;
  }
  .cta-content button {
    width: 80%;
  }

  /* About */
  .about-content {
    padding: 0 10px;
    font-size: 14px;
  }
}