:root {
  --bg: #fff7f9;
  --card: #fff;
  --accent: #ffd1dc;
  --accent2: #ffeeba;
  --text: #444;
  --radius: 16px;
  font-family: "Noto Sans JP", "Rounded Mplus 1c", sans-serif;
}

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

body {
  background: var(--bg);
  color: var(--text);
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  font-family: "Noto Sans JP", "Rounded Mplus 1c", sans-serif;
}

.card {
  background: var(--card);
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  width: 90%;
  max-width: 400px;
  text-align: center;
}

.title {
  margin-bottom: 24px;
  font-size: 22px;
  font-weight: bold;
}

input {
  width: 100%;
  padding: 10px;
  margin: 8px 0;
  border-radius: 12px;
  border: 1px solid #ddd;
  font-size: 15px;
  outline: none;
  transition: border-color 0.2s;
}

input:focus {
  border-color: var(--accent);
}

.btn {
  width: 100%;
  padding: 10px;
  margin-top: 12px;
  border: none;
  border-radius: 12px;
  background: linear-gradient(180deg, var(--accent), var(--accent2));
  font-weight: bold;
  cursor: pointer;
  font-size: 16px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.btn:hover {
  transform: scale(1.03);
  opacity: 0.9;
}

.link {
  margin-top: 16px;
}

.link a {
  text-decoration: none;
  color: #ff7fa3;
  font-weight: bold;
  font-size: 14px;
  transition: text-decoration 0.2s;
}

.link a:hover {
  text-decoration: underline;
}