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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, sans-serif;
  background: linear-gradient(135deg, #f8fafc 0%, #e0e7ff 100%);
  min-height: 100vh;
  padding-bottom: 100px;
}

.icon {
  width: 24px;
  height: 24px;
}

.header {
  background: white;
  border-bottom: 1px solid #e5e7eb;
  padding: 20px;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header-title {
  font-size: 24px;
  font-weight: 700;
  background: black;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
  text-align: center;
}

.header-subtitle {
  font-size: 14px;
  color: #6b7280;
}

/* Main Content */
.main-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 20px;
}

.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: white;
  border-top: 1px solid #e5e7eb;
  padding: 16px 20px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.nav-btn {
  background: none;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 8px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  color: #6b7280;
}

.nav-btn:hover {
  color: #111827;
}

.nav-icon {
  width: 24px;
  height: 24px;
}

.nav-label {
  font-size: 12px;
  font-weight: 600;
}

.btn-primary {
  background: black;
  color: white;
  border: none;
  padding: 18px;
  border-radius: 16px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
}

.btn-primary:hover {
  transform: translateY(-2px);
}

.btn-primary:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: #111827;
}

.section-icon {
  width: 24px;
  height: 24px;
  color: #2563eb;
}

.card {
  background: white;
  border-radius: 16px;
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  border: 1px solid #f3f4f6;
}

/* Responsive Design */
@media (max-width: 768px) {
  .header-title {
    font-size: 20px;
  }

  .main-content {
    padding: 24px 16px;
  }
}