:root {
  --bg: #1a1614;
  --card-bg: #26201d;
  --accent: #d98c3d;
  --text: #f2e9e1;
  --text-dim: #b8a99a;
  --free: #4caf7d;
  --paid: #d98c3d;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

header.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid #3a322c;
}

header.site-header h1 {
  font-size: 1.1rem;
  margin: 0;
}

header.site-header a {
  color: var(--text);
  text-decoration: none;
}

#auth-status {
  font-size: 0.85rem;
  color: var(--text-dim);
}

#auth-status button {
  margin-left: 8px;
  background: none;
  border: 1px solid var(--text-dim);
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 4px;
  cursor: pointer;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px;
}

.volume-block {
  margin-bottom: 32px;
}

.volume-block h2 {
  border-left: 4px solid var(--accent);
  padding-left: 10px;
}

.chapter-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chapter-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: var(--card-bg);
  border-radius: 8px;
  padding: 12px 16px;
  text-decoration: none;
  color: var(--text);
  transition: transform 0.15s;
}

.chapter-card:hover {
  transform: translateY(-2px);
}

.chapter-card img {
  width: 56px;
  height: 56px;
  object-fit: cover;
  border-radius: 6px;
  background: #333;
}

.chapter-card .info {
  flex: 1;
}

.chapter-card .title {
  font-weight: bold;
}

.badge {
  font-size: 0.75rem;
  padding: 3px 10px;
  border-radius: 999px;
  white-space: nowrap;
}

.badge.free {
  background: var(--free);
  color: #0a1c12;
}

.badge.paid {
  background: var(--paid);
  color: #2b1a05;
}

.badge.owned {
  background: #4b7bd9;
  color: #061426;
}

/* login page */
.login-box {
  max-width: 420px;
  margin: 60px auto;
  background: var(--card-bg);
  padding: 32px;
  border-radius: 10px;
}

.login-box input[type="email"] {
  width: 100%;
  padding: 10px;
  border-radius: 6px;
  border: 1px solid #4a3f37;
  background: #1f1a17;
  color: var(--text);
  margin: 12px 0;
}

.login-box button,
.buy-button {
  background: var(--accent);
  color: #2b1a05;
  border: none;
  padding: 10px 18px;
  border-radius: 6px;
  font-weight: bold;
  cursor: pointer;
}

.msg {
  font-size: 0.9rem;
  margin-top: 12px;
  color: var(--text-dim);
}

/* reader page */
.reader {
  max-width: 640px;
  margin: 0 auto;
  padding: 16px;
  text-align: center;
}

.reader img.page {
  width: 100%;
  display: block;
  margin-bottom: 8px;
  border-radius: 4px;
}

.paywall {
  background: var(--card-bg);
  padding: 40px 24px;
  border-radius: 10px;
  margin-top: 40px;
}

.paywall .price {
  font-size: 1.6rem;
  color: var(--accent);
  margin: 16px 0;
}

.nav-links {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
}

.nav-links a {
  color: var(--accent);
  text-decoration: none;
}