:root {
  color-scheme: light;
  font-family: "Pretendard", "Apple SD Gothic Neo", sans-serif;
  line-height: 1.5;
  background: #f4f6f8;
  color: #1a1a1a;
}

* { box-sizing: border-box; }

body { margin: 0; }

.topbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: #1e3a5f;
  color: #fff;
}

.topbar button {
  margin-left: auto;
  border: 0;
  border-radius: 6px;
  padding: 0.4rem 0.75rem;
  background: rgba(255,255,255,0.15);
  color: #fff;
}

.portal-nav {
  display: flex;
  gap: 0;
  max-width: 720px;
  margin: 0 auto;
  padding: 0.5rem 1rem 0;
}

.portal-nav .tab {
  flex: 1;
  border: 0;
  background: #e8edf2;
  color: #1e3a5f;
  padding: 0.65rem 0.5rem;
  font: inherit;
  border-radius: 10px 10px 0 0;
}

.portal-nav .tab.active {
  background: #fff;
  font-weight: 700;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem;
}

.card {
  background: #fff;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 0.75rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.08);
}

.card button, .card a.item-link {
  display: block;
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  padding: 0.5rem 0;
  font: inherit;
  color: inherit;
  text-decoration: none;
}

.section-title {
  font-weight: 700;
  color: #1e3a5f;
  margin: 0.5rem 0;
}

.muted { color: #666; font-size: 0.9rem; }

.badge-owned {
  display: inline-block;
  margin-left: 0.5rem;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  background: #e8f5e9;
  color: #2e7d32;
  font-size: 0.8rem;
}

button.buy-btn {
  margin-top: 0.75rem;
  width: 100%;
  padding: 0.7rem;
  border: 0;
  border-radius: 8px;
  background: #1e3a5f;
  color: #fff;
  font: inherit;
}

button.buy-btn:disabled {
  background: #9aa8b8;
}

.empty-hint {
  padding: 1rem 0;
  color: #666;
}

form label {
  display: block;
  margin-bottom: 0.75rem;
}

input {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  font: inherit;
}

button.primary {
  width: 100%;
  padding: 0.75rem;
  border: 0;
  border-radius: 8px;
  background: #1e3a5f;
  color: #fff;
  font: inherit;
}

.reader img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
}

.reader h1, .reader h2 { line-height: 1.3; }

.error { color: #b00020; }