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

body {
  font-family: Georgia, serif;
  background: #fdf6f0;
  color: #3a2e28;
  min-height: 100vh;
}

nav {
  background: #fff8f3;
  border-bottom: 2px solid #f0d9c8;
  padding: 1rem 2rem;
  display: flex;
  gap: 2rem;
  align-items: center;
}

nav a {
  text-decoration: none;
  color: #8b5e3c;
  font-size: 1rem;
  letter-spacing: 0.05em;
}

nav a:hover {
  color: #c0845a;
}

nav .brand {
  font-size: 1.3rem;
  font-weight: bold;
  color: #3a2e28;
  margin-right: auto;
}

.hero {
  text-align: center;
  padding: 5rem 2rem 3rem;
}

.hero .emoji {
  font-size: 5rem;
  display: block;
  margin-bottom: 1rem;
}

.hero h1 {
  font-size: 3rem;
  color: #3a2e28;
  margin-bottom: 0.5rem;
}

.hero .subtitle {
  font-size: 1.2rem;
  color: #8b5e3c;
  font-style: italic;
  margin-bottom: 2rem;
}

.hero .age-badge {
  display: inline-block;
  background: #f0d9c8;
  color: #6b3e26;
  padding: 0.4rem 1.2rem;
  border-radius: 999px;
  font-size: 0.95rem;
  letter-spacing: 0.05em;
}

.cards {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
  padding: 3rem 2rem;
}

.card {
  background: #fff8f3;
  border: 1.5px solid #f0d9c8;
  border-radius: 16px;
  padding: 2rem;
  width: 240px;
  text-align: center;
  text-decoration: none;
  color: inherit;
  transition: transform 0.15s, box-shadow 0.15s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(139, 94, 60, 0.12);
}

.card .card-icon {
  font-size: 2.8rem;
  display: block;
  margin-bottom: 0.75rem;
}

.card h2 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: #3a2e28;
}

.card p {
  font-size: 0.9rem;
  color: #7a6558;
}

.page-header {
  text-align: center;
  padding: 4rem 2rem 2rem;
  border-bottom: 1px solid #f0d9c8;
}

.page-header .emoji {
  font-size: 3.5rem;
  display: block;
  margin-bottom: 0.75rem;
}

.page-header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.4rem;
}

.page-header p {
  color: #8b5e3c;
  font-style: italic;
  font-size: 1.05rem;
}

.content {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 2rem;
}

.page-photo {
  display: block;
  max-width: 100%;
  max-height: 40vh;
  width: auto;
  object-fit: contain;
  border-radius: 16px;
  margin: 0 auto 2.5rem;
}

.milestone-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.milestone-list li {
  background: #fff8f3;
  border: 1.5px solid #f0d9c8;
  border-radius: 12px;
  padding: 1.2rem 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.milestone-list .m-icon {
  font-size: 1.8rem;
  flex-shrink: 0;
}

.milestone-list .m-text strong {
  display: block;
  font-size: 1.05rem;
  margin-bottom: 0.2rem;
}

.milestone-list .m-text span {
  font-size: 0.9rem;
  color: #7a6558;
}

.keys {
  display: flex;
  justify-content: center;
  gap: 0;
  margin: 2.5rem 0;
}

.white-key {
  width: 48px;
  height: 160px;
  background: #fff;
  border: 1.5px solid #d4b89a;
  border-radius: 0 0 8px 8px;
  position: relative;
  z-index: 1;
  cursor: default;
  transition: background 0.1s;
}

.white-key:hover {
  background: #fef3e8;
}

.black-key {
  width: 30px;
  height: 100px;
  background: #3a2e28;
  border-radius: 0 0 5px 5px;
  margin-left: -15px;
  margin-right: -15px;
  position: relative;
  z-index: 2;
  cursor: default;
}

.music-facts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-top: 2rem;
}

.fact-card {
  background: #fff8f3;
  border: 1.5px solid #f0d9c8;
  border-radius: 12px;
  padding: 1.2rem 1.4rem;
  text-align: center;
}

.fact-card .f-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 0.5rem;
}

.fact-card strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 0.3rem;
}

.fact-card span {
  font-size: 0.88rem;
  color: #7a6558;
}

footer {
  text-align: center;
  padding: 2rem;
  font-size: 0.85rem;
  color: #b09080;
  border-top: 1px solid #f0d9c8;
  margin-top: 4rem;
}