:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #EFF6FF;
  --text-main: #0F172A;
  --text-muted: #64748B;
  --bg-page: #F8FAFC;
  --bg-card: #FFFFFF;
  --border: #E2E8F0;
  --radius: 12px;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

header {
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
}

.logo-badge {
  background: var(--primary);
  color: white;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  transition: color 0.2s;
}

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

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 24px;
}

.hero {
  text-align: center;
  padding: 60px 20px;
}

.badge-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  padding: 6px 14px;
  border-radius: 20px;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

h1 {
  font-size: 38px;
  font-weight: 900;
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.2;
}

.subtitle {
  font-size: 18px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto 30px auto;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  margin-bottom: 24px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.04);
}

h2 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin: 28px 0 12px 0;
}

h2:first-child {
  margin-top: 0;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 18px 0 8px 0;
}

p, li {
  color: #334155;
  font-size: 15px;
  margin-bottom: 12px;
}

ul {
  padding-left: 20px;
  margin-bottom: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: white;
  padding: 12px 24px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 15px;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s;
}

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

.form-group {
  margin-bottom: 20px;
}

label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
}

input, textarea, select {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 15px;
  color: var(--text-main);
  background: #FFFFFF;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

footer {
  border-top: 1px solid var(--border);
  background: #FFFFFF;
  padding: 30px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 60px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-bottom: 12px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--primary);
}

@media (max-width: 640px) {
  h1 { font-size: 28px; }
  .card { padding: 24px; }
  .nav-container { flex-direction: column; gap: 12px; }
}