:root {
  --primary-color: #86B3D1;
  --secondary-color: #B3D0D9;
  --accent-color: #2A3E58;
  --light-color: #ECF1F1;
  --dark-color: #1D2A3C;
  --gradient-primary: linear-gradient(155deg, #86B3D1 0%, #9FC4D8 100%);
  --hover-color: #75A4C4;
  --background-color: #F8FAFB;
  --text-color: #2C3E50;
  --border-color: rgba(134, 179, 209, 0.2);
  --divider-color: rgba(134, 179, 209, 0.1);
  --shadow-color: rgba(29, 42, 60, 0.12);
  --highlight-color: #F0DB4F;
  --main-font: 'Montserrat', sans-serif;
  --alt-font: 'Lato', sans-serif;
}

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

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

body {
  font-family: var(--alt-font);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  color: var(--text-color);
  background-color: var(--background-color);
}

.pattern-bg {
  background-image: 
    radial-gradient(circle at 25% 40%, rgba(134, 179, 209, 0.045) 0%, transparent 38%),
    radial-gradient(circle at 75% 60%, rgba(179, 208, 217, 0.035) 0%, transparent 38%),
    repeating-linear-gradient(-45deg, transparent, transparent 45px, rgba(42, 62, 88, 0.02) 45px, rgba(42, 62, 88, 0.02) 90px);
  background-size: 100% 100%, 100% 100%, 90px 90px;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

header {
  background: var(--gradient-primary);
  padding: 1.2rem 0;
  position: relative;
  overflow: hidden;
  box-shadow: 0 2px 9px var(--shadow-color);
}

.header-decoration {
  position: absolute;
  top: 50%;
  right: 5.5%;
  width: 24px;
  height: 24px;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 3px;
  transform: translateY(-50%) rotate(45deg);
  display: none;
}

.header-decoration::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.25);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.header-decoration::after {
  content: '';
  position: absolute;
  top: -8px;
  right: -8px;
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
}

@media (min-width: 768px) {
  .header-decoration {
    display: block;
  }
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  width: 100%;
  padding: 0 1rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 1.5rem;
  }
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: white;
  font-family: var(--main-font);
  font-size: 1.8rem;
  font-weight: 700;
  text-decoration: none;
  width: fit-content;
  letter-spacing: 1.2px;
}

.logo-icon {
  width: 42px;
  height: 42px;
  background: #2A3E58;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.38rem;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.13);
  transform: rotate(-8deg);
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 2.5rem 0;
  justify-content: center;
}

.product-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: flex-start;
}

@media (min-width: 768px) {
  .product-section {
    grid-template-columns: 1fr 1fr;
  }
}

.product-left {
  display: flex;
  flex-direction: column;
  gap: 1.3rem;
}

.product-image-container {
  position: relative;
  display: flex;
  justify-content: center;
  border-radius: 15px;
  box-shadow: 0 5px 14px var(--shadow-color);
  background: white;
  border: 1px solid var(--border-color);
}

.product-image-container picture {
  display: flex;
  justify-content: center;
}

.product-image {
  width: 100%;
  padding: 27px;
  height: auto;
  transition: transform 0.3s ease;
}

@media (min-width: 768px) {
  .product-image {
    padding: 34px 42px;
  }
}

.product-image:hover {
  transform: scale(1.02);
}

.guarantee-block {
  background: linear-gradient(130deg, var(--light-color) 0%, white 100%);
  color: var(--text-color);
  padding: 1.5rem;
  border-radius: 15px;
  box-shadow: 0 4px 11px var(--shadow-color);
  border: 1px solid var(--border-color);
  border-bottom: 4px solid var(--primary-color);
}

.guarantee-block h3 {
  font-family: var(--main-font);
  color: var(--accent-color);
  margin-bottom: 0.85rem;
  font-size: 1.04rem;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.features-icons {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 480px) {
  .features-icons {
    grid-template-columns: 1fr;
  }
}

.feature-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  text-align: left;
  gap: 0.9rem;
  padding: 1.15rem 1.05rem;
  background: white;
  border-radius: 15px;
  box-shadow: 0 4px 11px var(--shadow-color);
  transition: all 0.3s ease;
  border: 2px solid var(--border-color);
}

.feature-item:hover {
  transform: scale(1.02);
  box-shadow: 0 6px 17px var(--shadow-color);
  border-color: var(--primary-color);
}

.feature-item .feature-icon {
  width: 46px;
  height: 46px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.feature-item span {
  font-size: 0.87rem;
  font-weight: 600;
  color: var(--text-color);
  font-family: var(--main-font);
  letter-spacing: 0.4px;
}

.cart-button {
  background: var(--gradient-primary);
  color: var(--dark-color);
  padding: 1.12rem 2.15rem;
  border: none;
  border-radius: 15px;
  font-size: 1.03rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  box-shadow: 0 4px 12px var(--shadow-color);
  font-family: var(--main-font);
  letter-spacing: 0.7px;
}

.cart-button:hover {
  background: linear-gradient(155deg, var(--hover-color) 0%, #8EBBD2 100%);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px var(--shadow-color);
}

.product-right h1 {
  font-family: var(--main-font);
  font-size: 2.38rem;
  color: var(--accent-color);
  margin-bottom: 1.05rem;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: 0.85px;
}

.price {
  font-size: 1.83rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 1.05rem 0;
  font-family: var(--main-font);
}

.product-description {
  font-size: 0.95rem;
  margin-bottom: 1.55rem;
  line-height: 1.87;
  color: var(--text-color);
}

.highlight-text {
  background: var(--highlight-color);
  color: var(--dark-color);
  padding: 1.35rem;
  border-radius: 15px;
  font-weight: 700;
  margin: 1.55rem 0;
  text-align: center;
  font-size: 1.03rem;
  box-shadow: 0 4px 12px var(--shadow-color);
  font-family: var(--main-font);
  letter-spacing: 0.6px;
}

.features-list {
  list-style: none;
  margin: 1.55rem 0;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 0.95rem;
  margin-bottom: 0.95rem;
  padding: 1.05rem;
  background: white;
  border-radius: 15px;
  box-shadow: 0 4px 11px var(--shadow-color);
  transition: all 0.3s ease;
  border-top: 2px solid var(--primary-color);
}

.features-list li:hover {
  transform: translateX(4px);
  box-shadow: 0 5px 14px var(--shadow-color);
  border-top-color: var(--accent-color);
}

.feature-check {
  width: 23px;
  height: 23px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  flex-shrink: 0;
  font-size: 0.76rem;
}

.benefits-section {
  background: var(--accent-color);
  padding: 3.15rem 1.5rem;
  position: relative;
  color: white;
}

.benefits-content {
  max-width: 1180px;
  margin: 0 auto;
}

.benefits-section h2 {
  font-family: var(--main-font);
  font-size: 1.98rem;
  font-weight: 700;
  margin-bottom: 2.35rem;
  letter-spacing: 0.75px;
  color: white;
  text-align: center;
}

.benefits-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
  margin-top: 2rem;
}

@media (min-width: 768px) {
  .benefits-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.benefit-card {
  background: rgba(255, 255, 255, 0.12);
  padding: 1.65rem 1.4rem;
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
  text-align: left;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 1rem;
}

.benefit-card:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.17);
  border-color: rgba(255, 255, 255, 0.3);
}

.benefit-icon {
  width: 50px;
  height: 50px;
  background: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
  flex-shrink: 0;
}

.benefit-content {
  flex: 1;
}

.benefit-card h3 {
  font-family: var(--main-font);
  font-size: 1.06rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: 0.5px;
  color: white;
}

.benefit-card p {
  font-size: 0.89rem;
  line-height: 1.74;
  color: rgba(255, 255, 255, 0.88);
}

.testimonials {
  background: var(--dark-color);
  color: white;
  padding: 3.15rem 1.5rem;
}

.testimonials h2 {
  font-family: var(--main-font);
  text-align: center;
  margin-bottom: 2.3rem;
  font-size: 1.98rem;
  font-weight: 700;
  letter-spacing: 0.75px;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.65rem;
  max-width: 1180px;
  margin: 0 auto;
}

@media (min-width: 768px) {
  .testimonials-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.testimonial {
  background: rgba(255, 255, 255, 0.08);
  padding: 1.6rem;
  border-radius: 15px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: transform 0.3s ease;
}

.testimonial:hover {
  transform: translateY(-2px);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 0.95rem;
  margin-bottom: 1.05rem;
}

.testimonial-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
}

.testimonial-name {
  font-weight: 700;
  font-size: 1.01rem;
  font-family: var(--main-font);
  letter-spacing: 0.5px;
}

.testimonial p {
  line-height: 1.75;
  font-size: 0.9rem;
}

footer {
  background: var(--dark-color);
  color: white;
  padding: 2rem 1.5rem;
}

.footer-content {
  max-width: 1180px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: center;
  padding-bottom: 1.5rem;
}

@media (min-width: 768px) {
  .footer-content {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-nav {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.05rem;
  justify-content: center;
}

@media (min-width: 768px) {
  .footer-nav {
    justify-content: flex-end;
  }
}

.footer-nav a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 0.85rem;
}

.footer-nav a:hover {
  color: var(--light-color);
}

.footer-credit {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
  max-width: 1180px;
  margin: 0 auto;
}

.footer-credit a {
  color: var(--light-color);
  text-decoration: none;
}