:root {
  --primary-color: #2D5C7F;
  --secondary-color: #1D3A52;
  --accent-color: #4A90E2;
  --light-color: #EAF2FB;
  --dark-color: #1D2A3C;
  --gradient-primary: linear-gradient(135deg, #2D5C7F 0%, #1D3A52 100%);
  --hover-color: #245070;
  --background-color: #F5F8FC;
  --text-color: #2C3E50;
  --border-color: rgba(45, 92, 127, 0.14);
  --divider-color: rgba(29, 42, 60, 0.08);
  --shadow-color: rgba(29, 42, 60, 0.10);
  --highlight-color: #B3D0D9;
  --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 {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: -1;
  background-image:
    radial-gradient(ellipse at 20% 85%, rgba(74,144,226,0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 15%, rgba(45,92,127,0.07) 0%, transparent 50%),
    repeating-linear-gradient(
      -55deg,
      transparent,
      transparent 36px,
      rgba(45,92,127,0.03) 36px,
      rgba(45,92,127,0.03) 38px
    );
}

/* HEADER */
header {
  background: #fff;
  padding: 1.2rem 0;
  position: relative;
  overflow: hidden;
  box-shadow: 0 1px 5px var(--shadow-color);
  border-bottom: 2px solid var(--highlight-color);
}

.header-decor {
  position: absolute;
  top: 0; right: 0;
  height: 100%; width: 200px;
  pointer-events: none;
  display: none;
}
@media (min-width: 768px) { .header-decor { display: block; } }

.header-decor-circle {
  position: absolute;
  top: 50%; right: 40px;
  transform: translateY(-50%);
  width: 30px; height: 30px;
  border-radius: 50%;
  border: 1.5px solid var(--highlight-color);
  opacity: 0.5;
}
.header-decor-circle-sm {
  position: absolute;
  top: 30%; right: 80px;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 1.5px solid var(--accent-color);
  opacity: 0.4;
}
.header-decor-dash {
  position: absolute;
  top: 65%; right: 60px;
  width: 40px; height: 2px;
  background: var(--primary-color);
  opacity: 0.2; border-radius: 2px;
}

.container {
  max-width: 1050px;
  margin: 0 auto;
  width: 100%;
  padding: 0 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--primary-color);
  font-family: var(--main-font);
  font-size: 1.5rem;
  font-weight: 700;
  text-decoration: none;
  text-transform: uppercase;
  letter-spacing: 2.5px;
}

.logo-icon {
  width: 36px; height: 36px;
  background: var(--primary-color);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; color: #fff;
  border-radius: 8px; flex-shrink: 0;
}

/* MAIN */
main {
  flex: 1;
  display: flex;
  align-items: center;
  padding: 1.5rem 0;
  justify-content: center;
}

.product-section {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  align-items: flex-start;
}
@media (min-width: 768px) {
  .product-section { grid-template-columns: 1fr 1fr; }
}

.product-left {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.product-image-container {
  display: flex;
  justify-content: center;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 3px 14px var(--shadow-color);
  border: 1px solid var(--border-color);
  padding: 0.85rem;
}

.product-image { width: 100%; height: auto; border-radius: 7px; display: block; }

.guarantee-block {
  background: var(--light-color);
  color: var(--text-color);
  padding: 0.9rem 1rem;
  border-radius: 8px;
  border-left: 3px solid var(--accent-color);
}
.guarantee-block h3 {
  font-family: var(--main-font);
  color: var(--primary-color);
  margin-bottom: 0.4rem;
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.guarantee-block p { font-size: 0.82rem; line-height: 1.6; }

/* 3 icons */
.features-icons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.feature-item {
  display: flex; flex-direction: column;
  align-items: center; gap: 0.4rem;
  padding: 0.7rem 0.25rem;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 5px var(--shadow-color);
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all 0.2s ease;
}
.feature-item:hover { transform: translateY(-2px); border-color: var(--accent-color); }

.feature-item .feature-icon {
  width: 40px; height: 40px;
  background: var(--light-color);
  border: 2px solid var(--highlight-color);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.feature-item span {
  font-size: 0.63rem; font-weight: 700;
  color: var(--text-color);
  font-family: var(--main-font);
  text-transform: uppercase; letter-spacing: 0.3px;
}

.cart-button {
  background: var(--accent-color);
  color: #fff;
  padding: 0.85rem 1.4rem;
  border: none; border-radius: 6px;
  font-size: 0.93rem; font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: block; text-align: center;
  box-shadow: 0 3px 8px rgba(74,144,226,0.25);
  font-family: var(--main-font);
  text-transform: uppercase; letter-spacing: 1.2px;
}
.cart-button:hover { background: #3a7cc8; transform: translateY(-1px); }

/* PRODUCT RIGHT */
.product-right h1 {
  font-family: var(--main-font);
  font-size: 1.9rem; color: var(--primary-color);
  margin-bottom: 0.55rem;
  font-weight: 700; text-transform: uppercase; letter-spacing: 2.5px;
}

.price {
  font-size: 1.6rem; font-weight: 700;
  color: var(--primary-color);
  margin: 0.55rem 0;
  font-family: var(--main-font);
}

.product-description {
  font-size: 0.85rem; margin-bottom: 0.85rem; line-height: 1.65;
}
.product-description p + p { margin-top: 0.5rem; }

.highlight-text {
  background: var(--primary-color);
  color: #fff;
  padding: 0.85rem 1rem;
  border-radius: 6px;
  font-weight: 700; margin: 0.85rem 0;
  text-align: center; font-size: 0.88rem;
  box-shadow: 0 3px 8px var(--shadow-color);
  font-family: var(--main-font);
  text-transform: uppercase; letter-spacing: 0.5px;
}

.features-list {
  list-style: none; margin: 0.7rem 0;
  display: flex; flex-direction: column; gap: 0.45rem;
}
.features-list li {
  display: flex; align-items: flex-start; gap: 0.65rem;
  padding: 0.65rem 0.8rem;
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 1px 4px var(--shadow-color);
  border: 1px solid var(--border-color);
  font-size: 0.83rem;
  transition: border-color 0.2s ease;
}
.features-list li:hover { border-color: var(--accent-color); }

.feature-check {
  width: 20px; height: 20px;
  background: var(--accent-color);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: bold; flex-shrink: 0; font-size: 0.68rem;
}

/* PROMO BLOCK */
.promo-block {
  background: var(--dark-color);
  color: #fff;
  padding: 1.8rem 1rem;
}
.promo-block-inner {
  max-width: 1050px;
  margin: 0 auto;
}
.promo-block h2 {
  font-family: var(--main-font);
  font-size: 1.2rem; font-weight: 700;
  margin-bottom: 1.1rem; text-align: center;
  text-transform: uppercase; letter-spacing: 1.5px;
  color: var(--highlight-color);
}
.promo-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
}
@media (min-width: 768px) {
  .promo-grid { grid-template-columns: repeat(3, 1fr); }
}
.promo-card {
  background: rgba(255,255,255,0.06);
  padding: 1rem; border-radius: 8px;
  border: 1px solid rgba(179,208,217,0.18);
  text-align: center;
}
.promo-card-icon { font-size: 1.7rem; margin-bottom: 0.55rem; }
.promo-card h3 {
  font-family: var(--main-font);
  font-size: 0.88rem; font-weight: 700;
  margin-bottom: 0.4rem;
  text-transform: uppercase; letter-spacing: 0.4px;
  color: var(--highlight-color);
}
.promo-card p { font-size: 0.8rem; line-height: 1.5; color: rgba(255,255,255,0.78); }

/* TESTIMONIALS */
.testimonials {
  background: var(--light-color);
  color: var(--text-color);
  padding: 1.8rem 1rem;
}
.testimonials h2 {
  font-family: var(--main-font);
  text-align: center; margin-bottom: 1.3rem;
  font-size: 1.35rem; font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase; letter-spacing: 1.5px;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.9rem;
  max-width: 1050px;
  margin: 0 auto;
}
@media (min-width: 768px) {
  .testimonials-grid { grid-template-columns: 1fr 1fr; }
}
.testimonial {
  background: #fff; padding: 1rem; border-radius: 8px;
  border-left: 3px solid var(--primary-color);
  box-shadow: 0 2px 7px var(--shadow-color);
  transition: transform 0.2s ease;
}
.testimonial:hover { transform: translateY(-2px); }
.testimonial-header {
  display: flex; align-items: center; gap: 0.65rem; margin-bottom: 0.65rem;
}
.testimonial-icon {
  width: 36px; height: 36px;
  background: var(--light-color);
  border: 1.5px solid var(--highlight-color);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; flex-shrink: 0;
}
.testimonial-name {
  font-weight: 700; font-size: 0.87rem;
  font-family: var(--main-font);
  color: var(--primary-color);
  text-transform: uppercase; letter-spacing: 0.3px;
}
.testimonial-location { font-size: 0.75rem; opacity: 0.7; }
.testimonial p { line-height: 1.6; font-size: 0.82rem; }

/* FOOTER */
footer {
  background: var(--dark-color);
  color: #fff;
  padding: 1.3rem 1rem;
}
.footer-content {
  max-width: 1050px; margin: 0 auto;
  display: flex; flex-direction: column;
  gap: 0.85rem; align-items: center;
  padding-bottom: 0.85rem;
}
@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: 0.65rem; justify-content: center;
}
@media (min-width: 768px) { .footer-nav { justify-content: flex-end; } }
.footer-content .logo { color: #fff; }
.footer-content .logo-icon { background: #fff; color: var(--dark-color); }
.footer-nav a {
  color: rgba(255,255,255,0.75); text-decoration: none;
  transition: color 0.2s ease; font-size: 0.79rem;
}
.footer-nav a:hover { color: var(--highlight-color); }
.footer-credit {
  text-align: center; padding-top: 0.85rem;
  border-top: 1px solid rgba(255,255,255,0.1);
  color: rgba(255,255,255,0.45); font-size: 0.75rem;
  max-width: 1050px; margin: 0 auto;
}
.footer-credit a { color: var(--highlight-color); text-decoration: none; }