:root {
  --bg: #f5f5f7;
  --dark: #22252a;
  --accent: #43c4b5;
  --muted: #7a7f89;
  --white: #ffffff;
  --ash: #c8c9cc;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

body {
  background: var(--bg);
  color: var(--dark);
  line-height: 1.6;
}

a {
  color: inherit;
  text-decoration: none;
}

header {
  padding: 16px 6vw;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(245, 245, 247, 0.94);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.03);
}

.logo {
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.logo span {
  color: var(--accent);
}

nav a {
  margin-left: 24px;
  font-size: 0.92rem;
  position: relative;
}

nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.2s ease;
}

nav a:hover::after {
  width: 100%;
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-radius: 999px;
  padding: 10px 22px;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  box-shadow: 0 9px 20px rgba(67, 196, 181, 0.3);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 24px rgba(67, 196, 181, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--dark);
  border-radius: 999px;
  padding: 10px 22px;
  border: 1px solid var(--ash);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
}

main {
  padding-bottom: 40px;
}

.hero {
  padding: 40px 6vw 70px;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
}

.hero-tag {
  text-transform: uppercase;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  margin-bottom: 12px;
  color: var(--accent);
  font-weight: 600;
}

.hero h1 {
  font-size: 2.7rem;
  margin-bottom: 18px;
}

.hero p {
  margin-bottom: 24px;
  color: var(--muted);
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-note {
  font-size: 0.78rem;
  color: var(--muted);
}

.hero-image {
  background: radial-gradient(circle at top, #ffffff, #e8f7f5);
  border-radius: 32px;
  padding: 40px;
  box-shadow: 0 24px 40px rgba(0, 0, 0, 0.06);
  min-height: 260px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image-placeholder {
  width: 190px;
  height: 280px;
  border-radius: 32px;
  border: 2px solid var(--accent);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #ffffff, #ecf8f6);
}

.hero-image-placeholder img {
  max-width: 80%;
  max-height: 80%;
  object-fit: contain;
}

section {
  padding: 40px 6vw;
}

.section-title {
  font-size: 1.6rem;
  margin-bottom: 10px;
}

.section-subtitle {
  color: var(--muted);
  margin-bottom: 28px;
  max-width: 560px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 24px;
}

.card {
  background: var(--white);
  border-radius: 20px;
  padding: 20px 22px;
  box-shadow: 0 12px 26px rgba(0, 0, 0, 0.03);
}

.card h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.card p {
  font-size: 0.9rem;
  color: var(--muted);
}

.pill {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(67, 196, 181, 0.1);
  color: var(--accent);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  margin-bottom: 6px;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

.sustain {
  background: #e8f2f1;
  border-radius: 30px;
}

.sustain-list {
  list-style: none;
  padding-left: 0;
}

.sustain-list li {
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 0.95rem;
}

.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 22px;
}

.review-quote {
  font-size: 0.98rem;
  margin-bottom: 8px;
}

.review-name {
  font-size: 0.85rem;
  color: var(--muted);
}

.faq-item {
  margin-bottom: 18px;
}

.faq-item h3 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.faq-item p {
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-box {
  background: var(--white);
  border-radius: 20px;
  box-shadow: 0 14px 28px rgba(0, 0, 0, 0.04);
  padding: 24px 22px;
  max-width: 460px;
}

.contact-box label {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.contact-box input,
.contact-box textarea {
  width: 100%;
  padding: 9px 10px;
  border-radius: 10px;
  border: 1px solid #d7dbe2;
  font-size: 0.9rem;
  margin-bottom: 10px;
}

.contact-box textarea {
  resize: vertical;
  min-height: 90px;
}

.form-status {
  font-size: 0.8rem;
  margin-top: 6px;
  color: var(--muted);
}

footer {
  padding: 26px 6vw 30px;
  font-size: 0.8rem;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  border-top: 1px solid #d7dbe2;
  margin-top: 30px;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .hero-image {
    order: -1;
  }
  nav {
    display: none;
  }
}

@media (max-width: 640px) {
  .hero h1 {
    font-size: 2.1rem;
  }
  header {
    padding: 14px 5vw;
  }
  section {
    padding: 32px 5vw;
  }
}