:root {
  --primary-color: #2D5C7F;
  --secondary-color: #1F4460;
  --accent-color: #4A90E2;
  --light-color: #ECF1F1;
  --dark-color: #1A3548;
  --gradient-primary: linear-gradient(125deg, #2D5C7F 0%, #3A7096 100%);
  --hover-color: #3B6D91;
  --background-color: #F8FAFB;
  --text-color: #3D4F5C;
  --border-color: rgba(45, 92, 127, 0.18);
  --divider-color: rgba(45, 92, 127, 0.1);
  --shadow-color: rgba(26, 53, 72, 0.12);
  --highlight-color: #B3D0D9;
  --main-font: 'Oswald', 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: 
    linear-gradient(30deg, rgba(45, 92, 127, 0.03) 12%, transparent 12.5%, transparent 87%, rgba(45, 92, 127, 0.03) 87.5%, rgba(45, 92, 127, 0.03)),
    linear-gradient(150deg, rgba(74, 144, 226, 0.03) 12%, transparent 12.5%, transparent 87%, rgba(74, 144, 226, 0.03) 87.5%, rgba(74, 144, 226, 0.03)),
    linear-gradient(30deg, rgba(179, 208, 217, 0.03) 12%, transparent 12.5%, transparent 87%, rgba(179, 208, 217, 0.03) 87.5%, rgba(179, 208, 217, 0.03));
  background-size: 80px 140px;
  background-position: 0 0, 0 0, 40px 70px;
  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 8px var(--shadow-color);
}

.header-decoration {
  position: absolute;
  top: 50%;
  right: 4%;
  width: 50px;
  height: 50px;
  border: 3px solid rgba(236, 241, 241, 0.15);
  border-radius: 50%;
  transform: translateY(-50%);
  display: none;
}

.header-decoration::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 30px;
  height: 30px;
  border: 2px solid rgba(236, 241, 241, 0.1);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

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

.container {
  max-width: 1100px;
  margin: 0 auto;
  width: 100%;
  padding: 0 1rem;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: white;
  font-family: var(--main-font);
  font-size: 1.7rem;
  font-weight: 600;
  text-decoration: none;
  width: fit-content;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--light-color);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

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: 1.2rem;
}

.product-image-container {
  position: relative;
  display: flex;
  justify-content: center;
  border-radius: 12px;
  box-shadow: 0 3px 14px var(--shadow-color);
  background: white;
}

.product-image-container picture {
  display: flex;
  justify-content: center;
  width: 100%;
}

.product-image {
  width: 100%;
  padding: 25px;
  height: auto;
  transition: transform 0.3s ease;
}

@media (min-width: 768px) {
  .product-image {
    padding: 30px 40px;
  }
}

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

.guarantee-block {
  background: var(--gradient-primary);
  color: white;
  padding: 1.4rem;
  border-radius: 10px;
  box-shadow: 0 3px 12px var(--shadow-color);
  position: relative;
  overflow: hidden;
}

.guarantee-block::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -8%;
  width: 90px;
  height: 90px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
}

.guarantee-block h3 {
  font-family: var(--main-font);
  color: white;
  margin-bottom: 0.7rem;
  font-size: 1.05rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.guarantee-block p {
  font-size: 0.9rem;
  line-height: 1.5;
}

.features-icons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0.9rem;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 8px var(--shadow-color);
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.feature-item:hover {
  transform: translateY(-2px);
  border-color: var(--accent-color);
  box-shadow: 0 4px 12px var(--shadow-color);
}

.feature-item .feature-icon {
  width: 42px;
  height: 42px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.feature-item span {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-color);
  font-family: var(--main-font);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.cart-button {
  background: var(--gradient-primary);
  color: white;
  padding: 1rem 2rem;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  text-align: center;
  box-shadow: 0 3px 10px var(--shadow-color);
  font-family: var(--main-font);
  text-transform: uppercase;
  letter-spacing: 0.6px;
}

.cart-button:hover {
  background: linear-gradient(125deg, var(--hover-color) 0%, var(--accent-color) 100%);
  transform: translateY(-1px);
  box-shadow: 0 5px 14px var(--shadow-color);
}

.product-right h1 {
  font-family: var(--main-font);
  font-size: 2.2rem;
  color: var(--primary-color);
  margin-bottom: 1rem;
  font-weight: 600;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 1.5px;
}

.price {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--accent-color);
  margin: 1rem 0;
  font-family: var(--main-font);
}

.product-description {
  font-size: 0.95rem;
  margin-bottom: 1.4rem;
  line-height: 1.6;
  color: var(--text-color);
}

.highlight-text {
  background: var(--gradient-primary);
  color: white;
  padding: 1.2rem;
  border-radius: 10px;
  font-weight: 600;
  margin: 1.4rem 0;
  text-align: center;
  font-size: 1rem;
  box-shadow: 0 3px 10px var(--shadow-color);
  font-family: var(--main-font);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.features-list {
  list-style: none;
  margin: 1.4rem 0;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
  padding: 0.9rem;
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 6px 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 3px 8px var(--shadow-color);
}

.feature-check {
  width: 20px;
  height: 20px;
  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: 0.75rem;
}

.benefits-section {
  background: linear-gradient(125deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: white;
  padding: 3rem 1.5rem;
  text-align: center;
  position: relative;
}

.benefits-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(255, 255, 255, 0.05) 0%, transparent 50%);
  pointer-events: none;
}

.benefits-content {
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.benefits-section h2 {
  font-family: var(--main-font);
  font-size: 1.9rem;
  font-weight: 600;
  margin-bottom: 1.8rem;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.benefits-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
  margin-top: 1.8rem;
}

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

.benefit-card {
  background: rgba(255, 255, 255, 0.09);
  padding: 1.5rem;
  border-radius: 10px;
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.12);
  transition: all 0.3s ease;
}

.benefit-card:hover {
  transform: translateY(-3px);
  background: rgba(255, 255, 255, 0.12);
}

.benefit-icon {
  width: 54px;
  height: 54px;
  background: rgba(255, 255, 255, 0.13);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin: 0 auto 0.8rem;
}

.benefit-card h3 {
  font-family: var(--main-font);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.benefit-card p {
  font-size: 0.9rem;
  line-height: 1.55;
  opacity: 0.92;
}

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

.testimonials h2 {
  font-family: var(--main-font);
  text-align: center;
  margin-bottom: 2rem;
  font-size: 1.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1.2px;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.4rem;
  max-width: 1100px;
  margin: 0 auto;
}

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

.testimonial {
  background: rgba(255, 255, 255, 0.07);
  padding: 1.5rem;
  border-radius: 10px;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.3s ease;
}

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

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1rem;
}

.testimonial-icon {
  width: 44px;
  height: 44px;
  background: var(--light-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}

.testimonial-name {
  font-weight: 600;
  font-size: 1rem;
  font-family: var(--main-font);
  text-transform: uppercase;
  letter-spacing: 0.4px;
}

.testimonial p {
  line-height: 1.6;
  font-size: 0.9rem;
}

footer {
  background: var(--dark-color);
  color: white;
  padding: 2.5rem 1.5rem;
}

.footer-content {
  max-width: 1100px;
  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: 1.2rem;
  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: 1100px;
  margin: 0 auto;
}

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