:root {
  color-scheme: light dark;
  --bg: #f4f5f7; --card: #ffffff; --text: #1a1a1a; --muted: #6b7280;
  --border: #e2e4e9; --accent: #0f766e; --accent-hover: #0d5c56; --accent2: #2dd4bf;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #10141a; --card: #1b2028; --text: #eceef1; --muted: #9aa1ab; --border: #2c3038; --accent: #2dd4bf; --accent-hover: #5eead4; }
}
:root[data-theme="dark"] { --bg: #10141a; --card: #1b2028; --text: #eceef1; --muted: #9aa1ab; --border: #2c3038; --accent: #2dd4bf; --accent-hover: #5eead4; }
:root[data-theme="light"] { --bg: #f4f5f7; --card: #ffffff; --text: #1a1a1a; --muted: #6b7280; --border: #e2e4e9; --accent: #0f766e; --accent-hover: #0d5c56; }
* { box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg); color: var(--text); margin: 0; line-height: 1.6;
}
a { color: var(--accent); }
.brand img { display: block; filter: none; }

.nav {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  padding: 1rem 2rem; border-bottom: 1px solid var(--border); flex-wrap: wrap;
}
.nav nav { display: flex; gap: 1.4rem; }
.nav nav a { color: var(--text); text-decoration: none; font-size: 0.92rem; font-weight: 600; }
.nav nav a:hover { color: var(--accent); }
.nav-right { display: flex; align-items: center; gap: 0.7rem; }
.theme-toggle { font-size: 0.9rem; padding: 0.25rem 0.55rem; border-radius: 8px; border: 1px solid var(--border); background: var(--card); color: var(--text); cursor: pointer; }
.lang-switch a { margin: 0 0.12rem; font-size: 1.1rem; text-decoration: none; color: var(--muted); opacity: 0.55; filter: grayscale(0.3); transition: opacity 0.15s, filter 0.15s; }
.lang-switch a.active { opacity: 1; filter: none; }
.lang-switch a:hover { opacity: 1; }

.hero {
  text-align: center; padding: 5rem 1.5rem 4rem;
  background: radial-gradient(circle at 50% 0%, rgba(45,212,191,0.16), transparent 60%);
}
.hero h1 { font-size: 2.4rem; margin: 0 0 0.8rem; max-width: 700px; margin-left: auto; margin-right: auto; }
.hero-sub { color: var(--muted); font-size: 1.1rem; max-width: 560px; margin: 0 auto 2rem; }
.btn-cta {
  display: inline-flex; align-items: center; gap: 0.55rem; font-size: 1.05rem; font-weight: 700; padding: 0.9rem 1.8rem;
  border-radius: 14px; background: linear-gradient(135deg, var(--accent2), var(--accent));
  color: white; text-decoration: none; box-shadow: 0 8px 24px rgba(15,118,110,0.35);
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.btn-cta img { display: block; }
.btn-cta:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(15,118,110,0.45); }
.btn-cta.secondary { background: var(--card); color: var(--accent); border: 1px solid var(--border); box-shadow: none; }
.btn-cta.secondary:hover { border-color: var(--accent); transform: none; box-shadow: none; }

.section { max-width: 900px; margin: 0 auto; padding: 3.5rem 1.5rem; }
.section h2 { font-size: 1.6rem; margin-bottom: 1rem; }
.section > p { color: var(--muted); max-width: 680px; }

.product-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 1.2rem; margin-top: 1.5rem; }
.product-card {
  display: block; background: var(--card); border: 1px solid var(--border); border-radius: 16px;
  padding: 1.6rem; text-decoration: none; color: var(--text);
  transition: transform 0.15s ease, border-color 0.15s ease;
}
.product-card:not(.muted):hover { transform: translateY(-3px); border-color: var(--accent); }
.product-card.muted { opacity: 0.65; }
.product-icon { font-size: 2rem; margin-bottom: 0.6rem; }
.product-card h3 { margin: 0 0 0.5rem; }
.product-card p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.values-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.4rem; margin-top: 1.5rem; }
.value-icon { font-size: 1.8rem; margin-bottom: 0.4rem; }
.value h3 { margin: 0 0 0.4rem; font-size: 1.05rem; }
.value p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.footer { text-align: center; padding: 3rem 1.5rem; border-top: 1px solid var(--border); margin-top: 2rem; }
.footer img { opacity: 0.7; margin-bottom: 0.8rem; }
.footer p { color: var(--muted); font-size: 0.82rem; margin: 0; }