body {
  font-family: "Microsoft JhengHei", "Segoe UI", sans-serif;
  background: linear-gradient(180deg, #cfeaf5, #8fd0e8);
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.card {
  background: rgba(255, 255, 255, 0.92);
  border-radius: 16px;
  padding: 32px;
  width: 320px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.card.wide {
  width: 480px;
}

h1 {
  font-size: 20px;
  color: #0b3a4a;
  margin: 0 0 16px 0;
}

h2 {
  font-size: 16px;
  color: #0b3a4a;
  margin: 8px 0;
}

label {
  display: block;
  margin: 12px 0 4px;
  color: #0b3a4a;
  font-size: 14px;
}

input[type="text"],
input[type="password"],
input[type="number"],
textarea,
select {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #a9c9d4;
  box-sizing: border-box;
  font-size: 15px;
}

input[type="color"] {
  width: 100%;
  height: 40px;
  border-radius: 8px;
  border: 1px solid #a9c9d4;
  padding: 2px;
}

input[type="file"] {
  width: 100%;
  margin-top: 4px;
}

.row {
  display: flex;
  gap: 12px;
}

.col {
  flex: 1;
}

button {
  margin-top: 20px;
  width: 100%;
  padding: 12px;
  border: none;
  border-radius: 10px;
  background: #2e9cc2;
  color: white;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #278aac;
}

button.secondary {
  width: auto;
  margin-top: 0;
  background: #8fa6ac;
  padding: 8px 16px;
  font-size: 14px;
}

.header-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.error {
  color: #c0392b;
  font-size: 13px;
  margin-top: 8px;
  min-height: 16px;
}

.status {
  color: #0b3a4a;
  font-size: 14px;
  margin-top: 12px;
  min-height: 18px;
}

.hidden {
  display: none;
}