* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f8f9fb;
  color: #222;
}

/* HEADER */
.app-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 20px;
  background: #fff;
  border-bottom: 1px solid #ddd;
  flex-wrap: wrap;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo {
  height: 36px;
  max-width: 180px;
  object-fit: contain;
}

.app-name {
  font-size: 18px;
  font-weight: 700;
}

.header-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.nav-link {
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 20px;
  background: #f2f2f2;
  color: #333;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid #ddd;
  transition: all 0.2s ease;
}

.nav-link:hover {
  background: #1f5fbf;
  color: #fff;
  border-color: #1f5fbf;
}

.nav-link.active {
  background: #1f5fbf;
  color: #fff;
  border-color: #1f5fbf;
}

/* FOOTER */
.app-footer {
  text-align: center;
  padding: 12px;
  font-size: 12px;
  background: #fff;
  border-top: 1px solid #ddd;
  margin-top: 30px;
}

/* PAGE CONTENT */
.page-content {
  padding: 16px 20px;
}

/* MOBILE */
@media (max-width: 600px) {
  .header-left {
    width: 100%;
    margin-bottom: 8px;
  }

  .header-nav {
    width: 100%;
  }
}