:root {
  --primary-color: #0D7377;
  --secondary-color: #095558;
  --accent-color: #14A0A6;
  --light-color: #DFF4F5;
  --dark-color: #052E30;
  --gradient-primary: linear-gradient(135deg, #14A0A6 0%, #0D7377 100%);
  --hover-color: #0A5F63;
  --background-color: #F5FBFB;
  --text-color: #062022;
  --border-color: rgba(13, 115, 119, 0.18);
  --divider-color: rgba(13, 115, 119, 0.1);
  --shadow-color: rgba(5, 46, 48, 0.1);
  --highlight-color: #B8912A;
  --highlight-light: #FBF3DC;
  --surface-color: #FFFFFF;
  --muted-color: #3D7275;
  --main-font: 'Source Sans Pro', sans-serif;
  --alt-font: 'Raleway', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--main-font);
  font-size: clamp(14px, 4vw, 16px);
  color: var(--text-color);
  background-color: var(--background-color);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* PATTERN: sine wave rows */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background-color: var(--background-color);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='20'%3E%3Cpath d='M0 10 C 25 0, 75 20, 100 10' stroke='%230D7377' stroke-width='0.6' fill='none' opacity='0.09'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 100px 20px;
}

/* ===================== HEADER ===================== */
.site-header {
  background-color: var(--dark-color);
  padding: 1.2rem 0;
  position: relative;
  overflow: hidden;
}
.header-decor {
  display: none;
  position: absolute;
  inset: 0;
  pointer-events: none;
}
@media (min-width: 768px) { .header-decor { display: block; } }
.header-decor::before {
  content: '';
  position: absolute;
  right: 20px; top: 50%;
  transform: translateY(-50%) rotate(30deg);
  width: 80px; height: 80px;
  background: rgba(20,160,166,0.12);
  clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
}
.header-decor::after {
  content: '';
  position: absolute;
  right: 130px; top: 50%;
  transform: translateY(-50%) rotate(15deg);
  width: 50px; height: 50px;
  background: rgba(184,145,42,0.15);
  clip-path: polygon(50% 0%, 93% 25%, 93% 75%, 50% 100%, 7% 75%, 7% 25%);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

/* Octagon logo */
.logo-icon {
  width: 38px; height: 38px;
  background: var(--accent-color);
  clip-path: polygon(30% 0%, 70% 0%, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0% 70%, 0% 30%);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.logo-icon svg { width: 20px; height: 20px; fill: #FFFFFF; }

.logo-text {
  font-family: var(--alt-font);
  font-size: clamp(17px, 4vw, 22px);
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: #FFFFFF;
}

/* ===================== CONTAINER ===================== */
.container {
  width: 100%;
  max-width: 1040px;
  margin: 0 auto;
  padding: 0 16px;
}
@media (min-width: 768px) { .container { padding: 0 28px; } }

/* ===================== MAIN ===================== */
main { flex: 1; padding: 2rem 0 1rem; }

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  align-items: start;
}
@media (min-width: 768px) {
  .product-grid {
    grid-template-columns: 380px 1fr;
    gap: 52px;
  }
}

/* --- LEFT --- */
.product-left { display: flex; flex-direction: column; gap: 16px; }

.product-image-wrap {
  background: var(--surface-color);
  padding: 24px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  border-radius: 2px;
  position: relative;
  box-shadow: 6px 6px 0 rgba(13,115,119,0.12);
}
.product-image-wrap picture,
.product-image-wrap img {
  max-width: 100%;
  height: auto;
  max-height: 252px;
  object-fit: contain;
  display: inline-block;
}

/* GUARANTEE */
.guarantee-block {
  display: flex;
  align-items: stretch;
  border: 1px solid var(--border-color);
  border-radius: 2px;
  overflow: hidden;
  background: var(--surface-color);
}
.guarantee-stripe {
  width: 8px;
  background: repeating-linear-gradient(
    180deg,
    var(--primary-color) 0px,
    var(--primary-color) 8px,
    var(--accent-color) 8px,
    var(--accent-color) 16px
  );
  flex-shrink: 0;
}
.guarantee-content {
  padding: 13px 15px;
}
.guarantee-content h3 {
  font-family: var(--alt-font);
  font-size: clamp(11px, 3vw, 12px);
  font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 5px;
}
.guarantee-content p {
  font-size: clamp(12px, 3vw, 13px);
  color: var(--muted-color);
  line-height: 1.6;
}

/* FEATURES LIST — icon + text, teal left bar */
.features-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.features-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: clamp(12px, 3.5vw, 13px);
  color: var(--text-color);
  padding: 9px 14px;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  border-left: 3px solid var(--accent-color);
}
.feature-diamond {
  width: 14px; height: 14px;
  background: var(--primary-color);
  transform: rotate(45deg);
  flex-shrink: 0;
}

/* CTA BUTTON */
.btn-cart {
  display: block;
  width: 100%;
  padding: 14px 20px;
  min-height: 44px;
  background: var(--primary-color);
  color: #FFFFFF;
  font-family: var(--alt-font);
  font-size: clamp(14px, 4vw, 16px);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 2px;
  text-align: center;
  text-decoration: none;
  border-radius: 2px;
  border: none;
  cursor: pointer;
  box-shadow: 4px 4px 0 rgba(13,115,119,0.3);
  transition: box-shadow 0.15s, transform 0.15s;
}
.btn-cart:hover {
  box-shadow: 2px 2px 0 rgba(13,115,119,0.3);
  transform: translate(2px, 2px);
}

/* --- RIGHT --- */
.product-right { display: flex; flex-direction: column; gap: 16px; }

.product-category {
  font-family: var(--alt-font);
  font-size: clamp(10px, 2.5vw, 11px);
  font-weight: 700;
  color: var(--accent-color);
  text-transform: uppercase;
  letter-spacing: 3px;
}

.product-title {
  font-family: var(--alt-font);
  font-size: clamp(30px, 6.5vw, 50px);
  font-weight: 800;
  color: var(--dark-color);
  line-height: 1.05;
  letter-spacing: 0px;
}
.product-title mark {
  background: var(--light-color);
  color: var(--primary-color);
  padding: 0 6px;
  font-style: normal;
}

.product-description {
  font-size: clamp(13px, 3.5vw, 15px);
  color: var(--text-color);
  line-height: 1.82;
}

/* FEATURE ITEMS — numbered horizontal with teal number accent */
.feature-items {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 16px;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  box-shadow: 3px 3px 0 rgba(13,115,119,0.08);
  transition: box-shadow 0.15s, transform 0.15s;
}
.feature-item:hover {
  box-shadow: 5px 5px 0 rgba(13,115,119,0.15);
  transform: translate(-1px, -1px);
}
.feature-item-num {
  font-family: var(--alt-font);
  font-size: clamp(26px, 5vw, 36px);
  font-weight: 800;
  color: var(--light-color);
  line-height: 1;
  flex-shrink: 0;
  min-width: 36px;
  text-align: center;
  background: var(--primary-color);
  padding: 6px 10px;
  border-radius: 2px;
}
.feature-item-body h4 {
  font-family: var(--alt-font);
  font-size: clamp(13px, 3.5vw, 15px);
  font-weight: 700;
  color: var(--dark-color);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 4px;
}
.feature-item-body p {
  font-size: clamp(12px, 3vw, 13px);
  color: var(--muted-color);
  line-height: 1.55;
}

.cta-text {
  background: var(--highlight-color);
  color: #FFFFFF;
  padding: 13px 18px;
  border-radius: 2px;
  font-family: var(--alt-font);
  font-size: clamp(14px, 4vw, 16px);
  font-weight: 700;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  box-shadow: 4px 4px 0 rgba(184,145,42,0.25);
}

/* ===================== BENEFITS BAND — 3-col icon-title cards, light bg ===================== */
.benefits-band {
  width: 100%;
  background: var(--dark-color);
  margin-top: 2rem;
  padding: 2.5rem 0;
  position: relative;
  overflow: hidden;
}
.benefits-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='20'%3E%3Cpath d='M0 10 C 25 0, 75 20, 100 10' stroke='%2314A0A6' stroke-width='0.6' fill='none' opacity='0.08'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 100px 20px;
  pointer-events: none;
}

.benefits-band h2 {
  font-family: var(--alt-font);
  font-size: clamp(15px, 3.5vw, 21px);
  font-weight: 800;
  color: #FFFFFF;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 2.5px;
  margin-bottom: 2rem;
  position: relative;
}

.benefits-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  position: relative;
}
@media (min-width: 768px) { .benefits-grid { grid-template-columns: repeat(3, 1fr); } }

.benefit-card {
  text-align: center;
  padding: 24px 18px;
  border: 1px solid rgba(20,160,166,0.25);
  border-top: 3px solid var(--accent-color);
  border-radius: 2px;
  background: rgba(255,255,255,0.04);
  transition: background 0.2s;
}
.benefit-card:hover { background: rgba(255,255,255,0.08); }
.benefit-icon-circle {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: rgba(20,160,166,0.15);
  border: 1px solid rgba(20,160,166,0.3);
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 14px;
  font-size: 22px;
}
.benefit-card h3 {
  font-family: var(--alt-font);
  font-size: clamp(13px, 3.5vw, 15px);
  font-weight: 700;
  color: #FFFFFF;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  margin-bottom: 8px;
}
.benefit-card p {
  font-size: clamp(12px, 3vw, 13px);
  color: rgba(255,255,255,0.65);
  line-height: 1.58;
}

/* ===================== TESTIMONIALS ===================== */
.testimonials-section {
  background-color: var(--light-color);
  padding: 2.5rem 0;
}
.testimonials-section h2 {
  font-family: var(--alt-font);
  font-size: clamp(15px, 3.5vw, 22px);
  font-weight: 800;
  color: var(--dark-color);
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 1.8rem;
}
.testimonials-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}
@media (min-width: 768px) { .testimonials-grid { grid-template-columns: 1fr 1fr; } }

.testimonial-card {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 2px;
  padding: 18px 20px;
  box-shadow: 4px 4px 0 rgba(13,115,119,0.1);
}
.testimonial-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
/* Octagon avatar */
.testimonial-avatar {
  width: 40px; height: 40px;
  background: var(--primary-color);
  clip-path: polygon(30% 0%, 70% 0%, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0% 70%, 0% 30%);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 12px;
  font-weight: 700;
  color: #FFFFFF;
  font-family: var(--alt-font);
}
.testimonial-name {
  font-family: var(--alt-font);
  font-size: clamp(13px, 3.5vw, 15px);
  font-weight: 700;
  color: var(--dark-color);
  text-transform: uppercase;
  letter-spacing: 0.8px;
}
.testimonial-stars {
  font-size: 12px;
  color: var(--highlight-color);
  margin-top: 2px;
  letter-spacing: 1.5px;
}
.testimonial-text {
  font-size: clamp(13px, 3.5vw, 14px);
  color: var(--muted-color);
  line-height: 1.68;
}

/* ===================== FOOTER ===================== */
.site-footer {
  background-color: var(--dark-color);
  border-top: 2px solid rgba(20,160,166,0.3);
  padding: 0 0 1rem;
}
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  padding-top: 1.4rem;
}
@media (min-width: 768px) {
  .footer-inner { flex-direction: row; align-items: center; justify-content: space-between; }
}
.footer-logo {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none;
}
.footer-logo .logo-icon {
  width: 30px; height: 30px;
  background: var(--accent-color);
  clip-path: polygon(30% 0%, 70% 0%, 100% 30%, 100% 70%, 70% 100%, 30% 100%, 0% 70%, 0% 30%);
  display: flex; align-items: center; justify-content: center;
}
.footer-logo .logo-icon svg { width: 15px; height: 15px; fill: #FFFFFF; }
.footer-logo .logo-text {
  font-family: var(--alt-font);
  font-size: 15px;
  font-weight: 800;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: #FFFFFF;
}
.footer-nav {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 4px 16px;
}
@media (min-width: 768px) { .footer-nav { justify-content: flex-end; } }
.footer-nav li a {
  font-size: 12px;
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  letter-spacing: 0.3px;
  transition: color 0.2s;
}
.footer-nav li a:hover { color: var(--accent-color); }
.footer-copy {
  font-size: 11px;
  color: rgba(255,255,255,0.28);
  text-align: center;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid rgba(255,255,255,0.07);
  width: 100%;
}