* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f4f7fb;
  color: #202b3c;
}

.topbar {
  background: #173b68;
  color: white;
  padding: 20px 7%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 15px;
}

.topbar h1 {
  margin: 0 0 6px;
  font-size: 25px;
}

.topbar p {
  margin: 0;
  color: #dce8f7;
}

main {
  width: min(1050px, 92%);
  margin: 30px auto;
  min-height: 70vh;
}

.auth-card, .search-card, .welcome {
  background: white;
  padding: 24px;
  border-radius: 12px;
  box-shadow: 0 3px 15px #152b4512;
  margin-bottom: 20px;
}

.auth-card {
  max-width: 450px;
  margin: 40px auto;
}

h2 {
  margin-top: 0;
}

label {
  display: block;
  margin: 15px 0 7px;
  font-weight: 600;
}

input {
  width: 100%;
  padding: 13px;
  border: 1px solid #cbd5e1;
  border-radius: 7px;
  font-size: 15px;
  outline: none;
}

input:focus {
  border-color: #2563eb;
}

button {
  border: 0;
  padding: 12px 18px;
  border-radius: 7px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

.primary {
  background: #1765c1;
  color: white;
}

.secondary {
  background: #e5edf7;
  color: #173b68;
}

button:hover {
  opacity: 0.9;
}

.tabs, .search-actions {
  display: flex;
  gap: 10px;
  margin: 15px 0;
  flex-wrap: wrap;
}

.tab {
  flex: 1;
  background: #e8eef6;
  color: #173b68;
}

.tab.active {
  background: #173b68;
  color: white;
}

#authSubmit {
  width: 100%;
  margin-top: 18px;
}

.hidden {
  display: none !important;
}

.message {
  color: #b42318;
  line-height: 1.5;
}

.results-heading {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin: 25px 0 15px;
}

.centres-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
  gap: 18px;
}

.centre-card {
  background: white;
  border-radius: 12px;
  padding: 20px;
  box-shadow: 0 3px 15px #152b4512;
  border-top: 4px solid #1765c1;
}

.centre-card h3 {
  margin: 0 0 12px;
  color: #173b68;
}

.centre-card p {
  line-height: 1.6;
  overflow-wrap: anywhere;
}

.centre-card .courses {
  color: #334155;
}

.centre-card .phone {
  font-weight: 700;
}

.centre-card .map-button {
  display: inline-block;
  margin-top: 8px;
  padding: 11px 14px;
  border-radius: 7px;
  color: white;
  background: #16834a;
  text-decoration: none;
  font-weight: 600;
}

footer {
  text-align: center;
  padding: 20px;
  color: #64748b;
}

@media (max-width: 600px) {
  .topbar {
    padding: 18px 5%;
  }

  .topbar h1 {
    font-size: 20px;
  }

  main {
    width: 94%;
    margin-top: 18px;
  }

  .auth-card, .search-card, .welcome {
    padding: 17px;
  }

  .search-actions button {
    width: 100%;
  }
}