:root {
  --bg: #f5f7fb;
  --surface: #ffffff;
  --text: #1b1f29;
  --muted: #586076;
  --accent: #3757ff;
  --accent-dark: #2a43c7;
  --line: #e5e9f3;
  --ok: #167a36;
  --radius: 14px;
  --container: 1140px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.5;
}

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

.container {
  width: min(var(--container), calc(100% - 48px));
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(245, 247, 251, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  min-height: 72px;
}

.brand {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.2px;
}

.nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  font-weight: 500;
  color: var(--muted);
}

.nav a:hover,
.nav a.active {
  color: var(--text);
}

.hero {
  padding: 72px 0 52px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px;
}

h1,
h2,
h3 {
  margin: 0 0 14px;
  line-height: 1.2;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
}

h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.1rem);
}

p {
  margin: 0 0 14px;
  color: var(--muted);
}

.btn-row {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid var(--accent);
}

.btn.primary {
  background: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-dark);
}

.btn.secondary {
  color: var(--accent);
}

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.stat {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 14px;
}

.stat strong {
  display: block;
  font-size: 1.35rem;
  margin-bottom: 4px;
}

.section {
  padding: 24px 0;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

ul.clean {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.badge {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.84rem;
  color: var(--muted);
  margin-bottom: 14px;
}

form {
  display: grid;
  gap: 12px;
}

label {
  font-weight: 600;
  font-size: 0.95rem;
}

input,
textarea {
  width: 100%;
  border: 1px solid #d5dced;
  border-radius: 10px;
  padding: 10px 12px;
  font: inherit;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.notice {
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #bde8c6;
  background: #effbf2;
  color: var(--ok);
  font-weight: 600;
}

.visually-hidden {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.footer {
  margin-top: 40px;
  border-top: 1px solid var(--line);
  padding: 26px 0;
  color: var(--muted);
}

@media (max-width: 900px) {
  .hero-grid,
  .grid-3,
  .grid-2,
  .stats {
    grid-template-columns: 1fr;
  }

  .header-inner {
    padding: 10px 0;
    flex-direction: column;
    align-items: flex-start;
  }
}