:root {
  --primary-color: #4A5C6A;
  --secondary-color: #6B7B8A;
  --accent-color: #7A9B8E;
  --light-color: #C5D0D8;
  --dark-color: #2C3E50;
  --gradient-primary: linear-gradient(135deg, #4A5C6A 0%, #7A9B8E 100%);
  --hover-color: #5A6C7A;
  --background-color: #F8F9FA;
  --text-color: #334155;
  --border-color: rgba(122, 155, 142, 0.2);
  --divider-color: rgba(74, 92, 106, 0.1);
  --shadow-color: rgba(74, 92, 106, 0.15);
  --highlight-color: #8BAF9F;
  --main-font: 'Ubuntu', sans-serif;
  --alt-font: 'Ubuntu', 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% 25%, var(--accent-color) 1px, transparent 1px),
    radial-gradient(circle at 75% 75%, var(--light-color) 1px, transparent 1px),
    linear-gradient(135deg, transparent 30%, rgba(74, 92, 106, 0.03) 50%, transparent 70%);
  background-size: 40px 40px, 28px 28px, 60px 60px;
  background-position: 0 0, 20px 20px, 0 0;
  opacity: 0.6;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

header {
  background: var(--gradient-primary);
  padding: 1.5rem 0;
  position: relative;
  overflow: hidden;
  box-shadow: 0 3px 15px var(--shadow-color);
}

.header-decoration {
  position: absolute;
  top: -15%;
  right: -2%;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(197, 208, 216, 0.12);
  display: none;
}

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

.container {
  max-width: 1150px;
  margin: 0 auto;
  width: 100%;
  padding: 0 1.5rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: white;
  font-family: var(--main-font);
  font-size: 1.6rem;
  font-weight: 700;
  text-decoration: none;
  width: fit-content;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--light-color);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 3rem 0;
  justify-content: center;
}

.product-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  align-items: flex-start;
}

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

.product-left {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.product-image-container {
  position: relative;
}

.product-image {
  width: 100%;
  height: auto;
  border-radius: 15px;
  box-shadow: 0 10px 28px var(--shadow-color);
  transition: transform 0.3s ease;
}

.product-image:hover {
  transform: translateY(-3px);
}

.price-badge {
  position: absolute;
  top: 15px;
  right: 15px;
  background: var(--accent-color);
  color: white;
  padding: 8px 16px;
  border-radius: 16px;
  font-weight: 600;
  font-size: 0.9rem;
  font-family: var(--main-font);
  box-shadow: 0 3px 10px rgba(122, 155, 142, 0.3);
}

.guarantee-block {
  background: var(--gradient-primary);
  color: white;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 6px 20px var(--shadow-color);
  position: relative;
  overflow: hidden;
}

.guarantee-block::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 50%;
}

.guarantee-block h3 {
  font-family: var(--main-font);
  color: white;
  margin-bottom: 1rem;
  font-size: 1.1rem;
  font-weight: 600;
}

.features-icons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 1.2rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 15px var(--shadow-color);
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.feature-item:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
}

.feature-item .feature-icon {
  width: 45px;
  height: 45px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.7rem;
  font-size: 1.3rem;
}

.feature-item span {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-color);
  font-family: var(--main-font);
}

.cart-button {
  background: var(--gradient-primary);
  color: white;
  padding: 1.2rem 2.5rem;
  border: none;
  border-radius: 10px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  box-shadow: 0 6px 20px var(--shadow-color);
  font-family: var(--main-font);
}

.cart-button:hover {
  background: linear-gradient(135deg, var(--hover-color) 0%, var(--highlight-color) 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 25px var(--shadow-color);
}

.product-right h1 {
  font-family: var(--main-font);
  font-size: 2.2rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
}

.price {
  font-size: 2.3rem;
  font-weight: 700;
  color: var(--accent-color);
  margin: 1.5rem 0;
  font-family: var(--main-font);
}

.product-description {
  font-size: 1rem;
  margin-bottom: 2rem;
  line-height: 1.7;
  color: var(--text-color);
}

.highlight-text {
  background: var(--gradient-primary);
  color: white;
  padding: 1.6rem;
  border-radius: 10px;
  font-weight: 600;
  margin: 2rem 0;
  text-align: center;
  font-size: 1.1rem;
  box-shadow: 0 6px 20px var(--shadow-color);
  font-family: var(--main-font);
}

.features-list {
  list-style: none;
  margin: 2rem 0;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1rem;
  padding: 1rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 4px 12px var(--shadow-color);
  transition: all 0.3s ease;
  border-left: 3px solid var(--accent-color);
}

.features-list li:hover {
  transform: translateX(3px);
  box-shadow: 0 5px 15px var(--shadow-color);
}

.feature-check {
  width: 22px;
  height: 22px;
  background: var(--accent-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  flex-shrink: 0;
  font-size: 0.8rem;
}

.testimonials {
  background: var(--primary-color);
  color: white;
  padding: 4rem 1.5rem;
}

.testimonials h2 {
  font-family: var(--main-font);
  text-align: center;
  margin-bottom: 3rem;
  font-size: 2.2rem;
  font-weight: 700;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  max-width: 1150px;
  margin: 0 auto;
}

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

.testimonial {
  background: rgba(255, 255, 255, 0.06);
  padding: 2rem;
  border-radius: 12px;
  backdrop-filter: blur(6px);
  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: 1.2rem;
  margin-bottom: 1.5rem;
}

.testimonial-icon {
  width: 48px;
  height: 48px;
  background: var(--light-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.testimonial-name {
  font-weight: 600;
  font-size: 1.1rem;
  font-family: var(--main-font);
}

.testimonial p {
  line-height: 1.7;
  font-size: 0.95rem;
}

footer {
  background: var(--dark-color);
  color: white;
  padding: 3rem 1.5rem;
}

.footer-content {
  max-width: 1150px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
  padding-bottom: 2rem;
}

@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: 1.5rem;
  justify-content: center;
}

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

.footer-nav a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 0.9rem;
}

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

.footer-credit {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
  max-width: 1150px;
  margin: 0 auto;
}

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