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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  background: linear-gradient(180deg, #1e293b, #0f172a);
  color: #f9fafb;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

header {
  text-align: center;
  padding: 1.5rem 1rem;
}

header h1 {
  font-size: 2rem;
  margin-bottom: 0.25rem;
}

header p {
  font-size: 0.9rem;
  opacity: 0.8;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1rem;
  max-width: 600px;
  width: 100%;
  margin: 0 auto;
}

.card {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 12px;
  padding: 1.25rem 1.5rem;
  box-shadow: 0 12px 25px rgba(15, 23, 42, 0.7);
}

.card h2 {
  margin-bottom: 0.75rem;
}

form {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

label {
  font-size: 0.9rem;
}

input[type="text"] {
  padding: 0.6rem 0.8rem;
  border-radius: 8px;
  border: 1px solid #64748b;
  background: #020617;
  color: #f9fafb;
}

input[type="text"]::placeholder {
  color: #9ca3af;
}

button {
  padding: 0.6rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  background: #38bdf8;
  color: #0f172a;
  transition: transform 0.1s ease, box-shadow 0.1s ease,
    background-color 0.1s ease;
}

button:hover {
  background: #0ea5e9;
  box-shadow: 0 8px 18px rgba(8, 47, 73, 0.8);
  transform: translateY(-1px);
}

button:active {
  transform: translateY(0);
  box-shadow: none;
}

.error {
  color: #f97373;
  font-size: 0.9rem;
  min-height: 1.2em;
}

#weatherResult p {
  margin-bottom: 0.25rem;
}

footer {
  text-align: center;
  padding: 1rem;
  font-size: 0.75rem;
  opacity: 0.8;
}

.hidden {
  display: none;
}

@media (min-width: 640px) {
  main {
    padding: 2rem 1rem 3rem;
  }

  header h1 {
    font-size: 2.2rem;
  }
}