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

:root {
  --color-bg: #0f0f0f;
  --color-bg-secondary: #1a1a1a;
  --color-bg-card: #141414;
  --color-text: #ffffff;
  --color-text-secondary: #a0a0a0;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-border: #2a2a2a;
  --color-border-hover: #404040;
  --font-main: "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-family: var(--font-main);
  font-size: 14px;
  font-weight: 500;
  text-decoration: none;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.btn--primary {
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}

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

.btn--outline {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-border-hover);
  background: var(--color-bg-secondary);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
}

.btn--lg {
  padding: 14px 28px;
  font-size: 15px;
}

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(15, 15, 15, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
}

.logo__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--color-primary);
  border-radius: 6px;
  font-weight: 700;
  font-size: 14px;
}

.logo__text {
  font-weight: 600;
  font-size: 16px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav__link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition);
}

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

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.burger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

.burger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.burger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 999;
  padding: 24px 20px;
}

.mobile-menu.active {
  display: block;
}

.mobile-menu__nav {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.mobile-menu__link {
  color: var(--color-text);
  text-decoration: none;
  font-size: 18px;
  font-weight: 500;
}

/* Hero */
.hero {
  padding: 140px 0 80px;
}

.hero__content {
  max-width: 640px;
}

.hero__badge {
  display: inline-block;
  padding: 6px 12px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}

.hero__title {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero__title span {
  color: var(--color-primary);
}

.hero__text {
  font-size: 18px;
  color: var(--color-text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
}

.hero__price {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.hero__price strong {
  font-size: 24px;
  color: var(--color-text);
  font-weight: 600;
}

.hero__buttons {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
}

.hero__note {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 80px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.stat__value {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.stat__label {
  font-size: 14px;
  color: var(--color-text-secondary);
}

/* Section Styles */
.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-secondary);
}

/* Features */
.features {
  padding: 80px 0;
  background: var(--color-bg-secondary);
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature {
  padding: 32px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition);
}

.feature:hover {
  border-color: var(--color-border-hover);
}

.feature__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-primary);
  margin-bottom: 20px;
}

.feature__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.feature__text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* How it works */
.how {
  padding: 80px 0;
}

.how__steps {
  max-width: 640px;
  margin: 0 auto;
}

.step {
  display: flex;
  gap: 24px;
  padding: 32px 0;
  border-bottom: 1px solid var(--color-border);
}

.step:last-child {
  border-bottom: none;
}

.step__number {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  flex-shrink: 0;
}

.step__title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step__text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.how__cta {
  text-align: center;
  margin-top: 40px;
}

/* Pricing */
.pricing {
  padding: 80px 0;
  background: var(--color-bg-secondary);
}

.pricing__grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.price-card {
  position: relative;
  padding: 28px 24px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.price-card:hover {
  border-color: var(--color-border-hover);
}

.price-card--popular {
  border-color: var(--color-primary);
}

.price-card__badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  padding: 4px 12px;
  background: var(--color-primary);
  border-radius: 20px;
  font-size: 11px;
  font-weight: 500;
  white-space: nowrap;
}

.price-card__header {
  margin-bottom: 20px;
}

.price-card__name {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 4px;
}

.price-card__clicks {
  font-size: 16px;
  font-weight: 600;
}

.price-card__price {
  margin-bottom: 20px;
}

.price-card__amount {
  display: block;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 4px;
}

.price-card__per {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* Crypto Card */
.pricing__crypto {
  margin-bottom: 24px;
}

.crypto-card {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 28px 32px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.crypto-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  color: var(--color-primary);
  flex-shrink: 0;
}

.crypto-card__title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.crypto-card__text {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.pricing__note {
  text-align: center;
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* FAQ */
.faq {
  padding: 80px 0;
}

.faq__list {
  max-width: 720px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-main);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.faq-item__icon {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--color-text-secondary);
}

.faq-item.active .faq-item__icon {
  transform: rotate(180deg);
}

.faq-item__answer {
  display: none;
  padding-bottom: 20px;
}

.faq-item.active .faq-item__answer {
  display: block;
}

.faq-item__answer p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* CTA */
.cta {
  padding: 80px 0;
  background: var(--color-bg-secondary);
}

.cta__inner {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}

.cta__title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.cta__text {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 32px;
}

.cta__buttons {
  display: flex;
  justify-content: center;
  gap: 12px;
}

/* Footer */
.footer {
  padding: 48px 0 24px;
  border-top: 1px solid var(--color-border);
}

.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer__desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-top: 16px;
  max-width: 280px;
}

.footer__title {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
}

.footer__links {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer__links a {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition);
}

.footer__links a:hover {
  color: var(--color-text);
}

.footer__bottom {
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.footer__bottom p {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* Responsive */
@media (max-width: 1024px) {
  .features__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 768px) {
  .nav {
    display: none;
  }

  .header .btn {
    display: none;
  }

  .burger {
    display: flex;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .hero__title {
    font-size: 32px;
  }

  .hero__text {
    font-size: 16px;
  }

  .hero__buttons {
    flex-direction: column;
  }

  .hero__stats {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-top: 48px;
  }

  .stat__value {
    font-size: 28px;
  }

  .section-title {
    font-size: 28px;
  }

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

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

  .crypto-card {
    flex-direction: column;
    text-align: center;
  }

  .cta__buttons {
    flex-direction: column;
  }

  .footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}