:root {
  --primary-color: #2D5C7F;
  --secondary-color: #1D2A3C;
  --accent-color: #4A90E2;
  --light-color: #EAF3FB;
  --dark-color: #1A2840;
  --gradient-primary: linear-gradient(135deg, #2D5C7F 0%, #1D2A3C 100%);
  --hover-color: #2C7FB2;
  --background-color: #F5F9FC;
  --text-color: #2C3E50;
  --border-color: rgba(45, 92, 127, 0.15);
  --divider-color: rgba(45, 92, 127, 0.1);
  --shadow-color: rgba(29, 42, 60, 0.1);
  --highlight-color: #D6EAF8;
  --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 background - diagonal lines */
.pattern-bg {
  background-image:
    repeating-linear-gradient(
      45deg,
      rgba(45, 92, 127, 0.03) 0px,
      rgba(45, 92, 127, 0.03) 1px,
      transparent 1px,
      transparent 12px
    ),
    radial-gradient(ellipse at 80% 20%, rgba(74, 144, 226, 0.06) 0%, transparent 50%),
    radial-gradient(ellipse at 10% 80%, rgba(29, 42, 60, 0.05) 0%, transparent 50%);
  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-deco {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  gap: 6px;
  align-items: center;
}

.header-deco-bar {
  width: 3px;
  background: rgba(255,255,255,0.15);
  border-radius: 2px;
}

.header-deco-bar:nth-child(1) { height: 22px; }
.header-deco-bar:nth-child(2) { height: 14px; }
.header-deco-bar:nth-child(3) { height: 30px; }
.header-deco-bar:nth-child(4) { height: 18px; }
.header-deco-bar:nth-child(5) { height: 26px; }

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

.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: 0.6rem;
  color: white;
  font-family: var(--main-font);
  font-size: 1.45rem;
  font-weight: 700;
  text-decoration: none;
  width: fit-content;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.logo-icon {
  width: 32px; height: 32px;
  background: rgba(255,255,255,0.15);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  border: 1px solid rgba(255,255,255,0.25);
}

main {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 1.8rem 0;
  justify-content: center;
}

.product-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.8rem;
  align-items: flex-start;
}

@media (min-width: 768px) {
  .product-section { grid-template-columns: 40% 60%; }
}

.product-left {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
}

.product-image-container {
  display: flex;
  justify-content: center;
  border-radius: 8px;
  box-shadow: 0 4px 16px var(--shadow-color);
  padding: 16px 20px;
  background: white;
  border: 1px solid var(--border-color);
  position: relative;
}

.product-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: #2ECC71;
  color: white;
  font-family: var(--main-font);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: 3px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

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

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

.guarantee-block {
  background: var(--highlight-color);
  padding: 0.9rem 1rem;
  border-radius: 8px;
  border-left: 4px solid var(--primary-color);
}

.guarantee-block h3 {
  font-family: var(--main-font);
  color: var(--primary-color);
  margin-bottom: 0.35rem;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

.guarantee-block p {
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-color);
}

.features-icons {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 0.55rem;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.35rem;
  padding: 0.7rem 0.4rem;
  background: white;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 1px 5px var(--shadow-color);
  transition: all 0.25s ease;
}

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

.feature-item .feature-icon {
  width: 38px; height: 38px;
  background: var(--light-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.05rem;
}

.feature-item span {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--secondary-color);
  font-family: var(--main-font);
  letter-spacing: 0.03em;
}

.cart-button {
  background: var(--gradient-primary);
  color: white;
  padding: 0.85rem 1.6rem;
  border: none;
  border-radius: 5px;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  text-decoration: none;
  display: block;
  text-align: center;
  box-shadow: 0 3px 10px var(--shadow-color);
  font-family: var(--main-font);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cart-button:hover {
  background: linear-gradient(135deg, var(--hover-color) 0%, var(--accent-color) 100%);
  transform: translateY(-2px);
  box-shadow: 0 5px 14px var(--shadow-color);
}

.product-right h1 {
  font-family: var(--main-font);
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 0.4rem;
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.price {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--primary-color);
  margin: 0.5rem 0;
  font-family: var(--main-font);
  display: inline-block;
  letter-spacing: 0.04em;
}

.product-description {
  font-size: 0.85rem;
  margin-bottom: 0.9rem;
  line-height: 1.7;
  color: var(--text-color);
}

.product-description p { margin-bottom: 0.65rem; }

.highlight-text {
  background: var(--gradient-primary);
  color: white;
  padding: 0.8rem 1rem;
  border-radius: 6px;
  font-weight: 700;
  margin: 0.9rem 0;
  text-align: center;
  font-size: 0.86rem;
  font-family: var(--main-font);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  box-shadow: 0 3px 10px var(--shadow-color);
}

.features-list {
  list-style: none;
  margin: 0.7rem 0;
}

.features-list li {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 0.45rem;
  padding: 0.55rem 0.8rem;
  background: white;
  border-radius: 5px;
  box-shadow: 0 1px 4px var(--shadow-color);
  border: 1px solid var(--border-color);
  font-size: 0.82rem;
  transition: border-color 0.2s ease;
}

.features-list li:hover { border-color: var(--accent-color); }

.feature-check {
  width: 16px; height: 16px;
  background: var(--gradient-primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  flex-shrink: 0;
  font-size: 0.58rem;
}

/* Benefits banner */
.benefits-banner {
  background: var(--gradient-primary);
  padding: 2rem 1.5rem;
  color: white;
}

.benefits-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.benefits-banner h2 {
  font-family: var(--main-font);
  text-align: center;
  margin-bottom: 1.4rem;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

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

.benefit-card {
  background: rgba(255,255,255,0.1);
  padding: 1.1rem;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.15);
  text-align: center;
  transition: background 0.3s ease;
}

.benefit-card:hover { background: rgba(255,255,255,0.16); }

.benefit-card-icon {
  font-size: 1.8rem;
  margin-bottom: 0.6rem;
  display: block;
}

.benefit-card h3 {
  font-family: var(--main-font);
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
  letter-spacing: 0.03em;
}

.benefit-card p {
  font-size: 0.79rem;
  line-height: 1.5;
  color: rgba(255,255,255,0.88);
}

/* Testimonials */
.testimonials {
  background: var(--dark-color);
  color: white;
  padding: 2rem 1.5rem;
}

.testimonials h2 {
  font-family: var(--main-font);
  text-align: center;
  margin-bottom: 1.6rem;
  font-size: 1.4rem;
  font-weight: 700;
  color: white;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  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: 1rem;
  border-radius: 7px;
  border-top: 3px solid var(--accent-color);
  transition: all 0.3s ease;
}

.testimonial:hover {
  background: rgba(255,255,255,0.11);
  transform: translateY(-2px);
}

.testimonial-header {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.65rem;
}

.testimonial-icon {
  width: 34px; height: 34px;
  background: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.testimonial-name {
  font-weight: 700;
  font-size: 0.86rem;
  font-family: var(--main-font);
  color: white;
  letter-spacing: 0.03em;
}

.testimonial-city { font-size: 0.74rem; color: rgba(255,255,255,0.55); }

.testimonial p {
  line-height: 1.55;
  font-size: 0.81rem;
  color: rgba(255,255,255,0.85);
}

footer {
  background: var(--secondary-color);
  color: white;
  padding: 1.6rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.footer-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  align-items: center;
  padding-bottom: 1rem;
}

@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: 0.8rem;
  justify-content: center;
}

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

.footer-nav a {
  color: rgba(255,255,255,0.65);
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 0.78rem;
}

.footer-nav a:hover { color: white; }

.footer-credit {
  text-align: center;
  padding-top: 0.9rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.4);
  font-size: 0.72rem;
  max-width: 1100px;
  margin: 0 auto;
}

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