body {
  margin: 0;
  font-family: 'Segoe UI', Arial, sans-serif;
  background: #f5f6fa;
  color: #222;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 16px;
}

.main-topbar {
  background: #23272f;
  color: #fff;
  padding: 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.main-topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.topbar-left .logo {
  font-size: 1.6rem;
  font-weight: bold;
  letter-spacing: 1px;
}
.topbar-menu a {
  color: #fff;
  text-decoration: none;
  margin-left: 32px;
  font-size: 1.1rem;
  font-weight: 500;
  transition: color 0.2s;
}
.topbar-menu a:hover {
  color: #3b82f6;
}

.landing-main {
  padding-top: 0;
}
.hero-section {
  background: linear-gradient(90deg, #3b82f6 0%, #2563eb 100%);
  color: #fff;
  padding: 56px 0 48px 0;
  text-align: center;
}
.hero-section h1 {
  font-size: 2.5rem;
  margin-bottom: 18px;
}
.hero-section p {
  font-size: 1.2rem;
  margin-bottom: 28px;
}
.btn {
  background: #3b82f6;
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 10px 22px;
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.2s;
  font-weight: 500;
  text-decoration: none;
  display: inline-block;
}
.btn-lg {
  font-size: 1.2rem;
  padding: 14px 36px;
}
.btn:hover {
  background: #2563eb;
}

.rates-section {
  background: #fff;
  padding: 40px 0 32px 0;
  margin-top: -32px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
}
.rates-section h2 {
  font-size: 1.5rem;
  margin-bottom: 18px;
}
.main-rates-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 0;
}
.main-rates-table th, .main-rates-table td {
  padding: 14px 10px;
  text-align: left;
}
.main-rates-table th {
  background: #f3f4f6;
  color: #374151;
  font-weight: 600;
  border-bottom: 2px solid #e5e7eb;
}
.main-rates-table td {
  border-bottom: 1px solid #e5e7eb;
}

.exchange-calc-section {
  background: #f5f6fa;
  padding: 40px 0 32px 0;
}
.exchange-calc-section h2 {
  font-size: 1.3rem;
  margin-bottom: 18px;
}
.exchange-form {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.04);
  padding: 28px 32px;
  max-width: 480px;
  margin: 0 auto;
}
.form-row {
  display: flex;
  align-items: center;
  margin-bottom: 18px;
  gap: 12px;
}
.form-row label {
  min-width: 90px;
  font-weight: 500;
}
.form-row input, .form-row select {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  font-size: 1rem;
  background: #f9fafb;
}
.form-row input:focus, .form-row select:focus {
  outline: none;
  border-color: #3b82f6;
}

.advantages-section {
  background: #fff;
  padding: 40px 0 32px 0;
}
.advantages-section h2 {
  font-size: 1.3rem;
  margin-bottom: 18px;
  text-align: center;
}
.advantages-list {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.advantage-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: #f3f4f6;
  border-radius: 10px;
  padding: 24px 32px;
  min-width: 180px;
  margin-bottom: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}
.adv-icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

.about-section {
  background: #f5f6fa;
  padding: 40px 0 32px 0;
}
.about-section h2 {
  font-size: 1.3rem;
  margin-bottom: 12px;
}

.main-footer {
  background: #23272f;
  color: #fff;
  padding: 24px 0;
  margin-top: 0;
}
.main-footer .container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
}
.footer-menu a {
  color: #fff;
  text-decoration: none;
  margin-left: 24px;
  font-size: 1rem;
  transition: color 0.2s;
}
.footer-menu a:hover {
  color: #3b82f6;
}

@media (max-width: 900px) {
  .main-topbar .container {
    flex-direction: column;
    height: auto;
    padding: 12px 0;
  }
  .topbar-menu a {
    margin-left: 16px;
    font-size: 1rem;
  }
  .advantages-list {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }
  .exchange-form {
    padding: 16px 8px;
  }
  .main-footer .container {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
}