/* ===== RESET & BASE ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: #1a1a2e;
  background: #fff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ===== UTILITIES ===== */
.container {
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.highlight {
  background: linear-gradient(135deg, #FFD700, #FF8C00);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  font-family: inherit;
  font-weight: 600;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  background: linear-gradient(135deg, #FFD700, #FF8C00);
  color: #1a1a2e;
  text-align: center;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 140, 0, 0.35);
}

.btn:active {
  transform: translateY(0);
}

.btn--small {
  padding: 10px 20px;
  font-size: 0.875rem;
  border-radius: 10px;
}

.btn--large {
  padding: 16px 40px;
  font-size: 1.125rem;
  border-radius: 14px;
}

.btn--cta {
  font-size: 1.25rem;
  padding: 20px 48px;
  border-radius: 16px;
  box-shadow: 0 4px 20px rgba(255, 140, 0, 0.3);
}

/* ===== ANIMATIONS ===== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== HEADER (5%) ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

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

.header__logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.125rem;
}

.header__logo-icon {
  font-size: 1.5rem;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 80px 24px 60px;
  background: linear-gradient(180deg, #FFFDF5 0%, #FFF8E7 100%);
}

.hero__inner {
  max-width: 720px;
}

.hero__title {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2.5vw, 1.3rem);
  color: #555;
  margin-bottom: 36px;
  line-height: 1.5;
}

.hero__note {
  margin-top: 16px;
  font-size: 0.9rem;
  color: #888;
}

/* ===== SECTIONS ===== */
.section {
  padding: 80px 0;
}

.section__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section__subtitle {
  text-align: center;
  color: #666;
  font-size: 1.1rem;
  margin-bottom: 48px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== PAINS (15%) ===== */
.pains {
  min-height: 50vh;
  background: #fff;
}

.pains__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 48px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.pain-card {
  background: #FFF9EE;
  border: 1px solid #FFE8B8;
  border-radius: 16px;
  padding: 28px 24px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.pain-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(255, 200, 0, 0.15);
}

.pain-card__icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.pain-card__text {
  font-size: 1rem;
  color: #444;
  line-height: 1.5;
}

/* ===== BENEFITS (20%) ===== */
.benefits {
  min-height: 60vh;
  background: linear-gradient(180deg, #FFFDF5 0%, #fff 100%);
}

.benefits__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.benefit-card {
  background: #fff;
  border: 1px solid #f0f0f0;
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}

.benefit-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.benefit-card__icon {
  font-size: 2.5rem;
  margin-bottom: 14px;
}

.benefit-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.benefit-card__text {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.5;
}

/* ===== PRODUCT (40%) ===== */
.product {
  min-height: 100vh;
  background: #fff;
  padding-bottom: 60px;
}

.product__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.product-card {
  background: linear-gradient(145deg, #FFFDF5, #FFF8E7);
  border: 1px solid #FFE8B8;
  border-radius: 20px;
  padding: 32px 24px;
  transition: transform 0.3s, box-shadow 0.3s;
}

.product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 35px rgba(255, 200, 0, 0.18);
}

.product-card--wide {
  grid-column: 1 / -1;
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  width: 100%;
}

.product-card__icon {
  font-size: 2.5rem;
  margin-bottom: 14px;
}

.product-card__title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.product-card__text {
  font-size: 0.95rem;
  color: #555;
  line-height: 1.5;
  margin-bottom: 14px;
}

.product-card__cost {
  display: inline-block;
  background: linear-gradient(135deg, #FFD700, #FF8C00);
  color: #1a1a2e;
  font-weight: 600;
  font-size: 0.85rem;
  padding: 5px 14px;
  border-radius: 20px;
}

/* Models */
.product__models {
  margin-top: 64px;
  text-align: center;
}

.product__models-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 32px;
}

.models__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 800px;
  margin: 0 auto;
}

.model-card {
  background: #fff;
  border: 2px solid #f0f0f0;
  border-radius: 20px;
  padding: 32px 20px;
  transition: transform 0.3s, box-shadow 0.3s;
  position: relative;
}

.model-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
}

.model-card--popular {
  border-color: #FFD700;
  box-shadow: 0 4px 20px rgba(255, 215, 0, 0.2);
}

.model-card__badge {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, #FFD700, #FF8C00);
  color: #1a1a2e;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 20px;
  white-space: nowrap;
}

.model-card__name {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.model-card__desc {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 16px;
}

.model-card__price {
  font-size: 1.1rem;
  font-weight: 700;
  color: #FF8C00;
}

/* ===== CTA (20%) ===== */
.cta {
  min-height: 60vh;
  background: linear-gradient(180deg, #FFF8E7 0%, #FFFDF5 50%, #fff 100%);
  display: flex;
  align-items: center;
}

.cta__inner {
  text-align: center;
}

.cta__content {
  margin-bottom: 48px;
}

.cta__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.cta__subtitle {
  font-size: 1.15rem;
  color: #555;
  margin-bottom: 32px;
  max-width: 550px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.6;
}

.referral-block {
  background: #fff;
  border: 2px solid #FFE8B8;
  border-radius: 20px;
  padding: 32px 40px;
  max-width: 560px;
  margin: 0 auto;
}

.referral-block__title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.referral-block__text {
  font-size: 1rem;
  color: #555;
  line-height: 1.6;
}

/* ===== FOOTER ===== */
.footer {
  background: #1a1a2e;
  color: #aaa;
  padding: 24px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer__logo {
  font-weight: 600;
  font-size: 1rem;
  color: #fff;
}

.footer__link {
  color: #FFD700;
  font-weight: 500;
  transition: color 0.2s;
}

.footer__link:hover {
  color: #FF8C00;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .pains__grid {
    grid-template-columns: 1fr;
  }

  .benefits__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .product__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .models__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .model-card--popular {
    order: -1;
  }

  .hero {
    padding: 100px 20px 48px;
    min-height: auto;
  }

  .section {
    padding: 60px 0;
  }

  .btn--large {
    padding: 14px 32px;
    font-size: 1rem;
  }

  .btn--cta {
    padding: 16px 36px;
    font-size: 1.1rem;
  }

  .referral-block {
    padding: 24px 20px;
  }

  .header__inner {
    height: 56px;
  }

  .btn--small {
    padding: 8px 16px;
    font-size: 0.8rem;
  }

  .footer__inner {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 15px;
  }

  .hero__title {
    font-size: 2rem;
  }

  .container {
    padding: 0 16px;
  }
}