:root {
  --ink: #111;
  --muted: #5f6368;
  --line: #e6e8eb;
  --bg: #fff;
  --soft: #f5f7f9;
  --brand: #3bb4f2;
  --brand-dark: #1593d4;
  --radius: 14px;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.header .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 16px; }
.logo img { height: 40px; width: auto; }
.nav { display: flex; align-items: center; gap: 28px; font-weight: 500; font-size: 15px; }
.nav a:hover { color: var(--brand-dark); }
.lang {
  border: 1px solid var(--line); background: none; border-radius: 999px;
  padding: 6px 12px; font: inherit; font-size: 13px; font-weight: 600; cursor: pointer;
}
.lang:hover { border-color: var(--brand); }
.menu-btn { display: none; background: none; border: 0; font-size: 26px; cursor: pointer; }

/* Buttons */
.btn {
  display: inline-block; padding: 12px 22px; border-radius: 999px;
  font-weight: 600; font-size: 15px; transition: background .2s, color .2s;
}
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--brand-dark); }
.btn-ghost { border: 1px solid var(--line); }
.btn-ghost:hover { border-color: var(--ink); }

/* Hero */
.hero { padding: 96px 0 80px; background: radial-gradient(ellipse at 80% 0%, #e6f6fe 0%, transparent 60%); }
.eyebrow { color: var(--brand-dark); font-weight: 600; font-size: 14px; letter-spacing: .08em; text-transform: uppercase; }
.hero h1 { font-size: clamp(36px, 6vw, 60px); line-height: 1.1; margin: 12px 0 20px; letter-spacing: -0.02em; max-width: 820px; }
.hero h1 span { color: var(--brand); }
.hero p { font-size: 19px; color: var(--muted); max-width: 640px; margin: 0 0 32px; }
.hero .actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Sections */
section { padding: 88px 0; }
section.alt { background: var(--soft); }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head h2 { font-size: clamp(28px, 4vw, 40px); margin: 8px 0 12px; letter-spacing: -0.01em; line-height: 1.2; }
.section-head p { color: var(--muted); margin: 0; font-size: 17px; }

/* Product cards */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 28px; display: flex; flex-direction: column; gap: 12px;
  transition: transform .2s, box-shadow .2s, border-color .2s;
}
.card:hover { transform: translateY(-3px); box-shadow: 0 12px 32px rgba(0,0,0,.06); border-color: var(--brand); }
.card .icon {
  width: 56px; height: 56px; border-radius: 12px; display: grid; place-items: center;
  background: #e6f6fe; color: var(--brand-dark); font-size: 22px;
}
.card h3 { margin: 4px 0 0; font-size: 22px; }
.card .tag { color: var(--brand-dark); font-weight: 600; font-size: 14px; }
.card p { color: var(--muted); margin: 0; flex: 1; }
.card .more { font-weight: 600; font-size: 15px; }

.card .icon img, .product-hero .icon img { width: 100%; height: 100%; object-fit: cover; border-radius: inherit; }
.card .icon:has(img), .product-hero .icon:has(img) { background: none; overflow: hidden; }
.product-hero .btn + .btn { margin-left: 10px; }

/* About */
.about { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; }
.stat b { display: block; font-size: 32px; color: var(--brand-dark); }
.stat span { color: var(--muted); font-size: 14px; }
.values { list-style: none; padding: 0; margin: 24px 0 0; display: grid; gap: 14px; }
.values li { padding-left: 28px; position: relative; }
.values li::before { content: ""; position: absolute; left: 0; top: 7px; width: 12px; height: 12px; border-radius: 3px; border: 2px solid var(--brand); }

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; }
.contact-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 18px; }
.contact-list small { display: block; color: var(--muted); font-size: 13px; }
.contact-list a:hover { color: var(--brand-dark); }
form { display: grid; gap: 14px; }
input, textarea, select {
  width: 100%; font: inherit; padding: 12px 14px; border: 1px solid var(--line);
  border-radius: 10px; background: #fff;
}
input:focus, textarea:focus, select:focus { outline: 2px solid var(--brand); border-color: transparent; }
textarea { min-height: 130px; resize: vertical; }
.hidden { display: none; }
button:disabled { opacity: .6; cursor: wait !important; }
.form-status { margin: 0; font-size: 15px; font-weight: 500; }
.form-status.ok { color: #1a7f4b; }
.form-status.err { color: #c62828; }

/* Product page */
.product-hero { padding: 80px 0 64px; background: radial-gradient(ellipse at 80% 0%, #e6f6fe 0%, transparent 60%); }
.product-hero .icon { width: 80px; height: 80px; font-size: 30px; border-radius: 16px; display: grid; place-items: center; background: #e6f6fe; color: var(--brand-dark); margin-bottom: 20px; }
.back { color: var(--muted); font-size: 14px; display: inline-block; margin-bottom: 28px; }
.back:hover { color: var(--ink); }
.features { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.feature { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; background: #fff; font-weight: 500; }
.feature::before { content: "✓"; color: var(--brand-dark); font-weight: 700; margin-right: 10px; }
.others { display: flex; gap: 10px; flex-wrap: wrap; }
.others a { border: 1px solid var(--line); border-radius: 999px; padding: 8px 16px; font-weight: 500; }
.others a:hover { border-color: var(--brand); color: var(--brand-dark); }

/* Footer */
.footer { border-top: 1px solid var(--line); padding: 40px 0; color: var(--muted); font-size: 14px; }
.footer .wrap { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; align-items: center; }
.footer img { height: 28px; }

@media (max-width: 820px) {
  .menu-btn { display: block; }
  .nav {
    display: none; position: absolute; top: 72px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; align-items: flex-start; padding: 16px 20px; gap: 16px;
  }
  .nav.open { display: flex; }
  .about, .contact { grid-template-columns: 1fr; }
  section { padding: 64px 0; }
  .hero { padding: 64px 0 56px; }
}