:root {
  --bg: #f7f8ff;
  --ink: #2e2a4d;
  --muted: #625e84;
  --card: #ffffff;
  --line: #d8d4f8;
  --primary: #ff6f91;
  --primary-dark: #f6547b;
  --ghost: #f5f2ff;
  --success: #31b889;
  --warning: #f7a531;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #fff5fb 0%, var(--bg) 55%);
  color: var(--ink);
  font-family: "Nunito", "Avenir Next", "Segoe UI", sans-serif;
}

a {
  color: #5c4fd7;
}

.topbar {
  align-items: center;
  background: #fff;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  padding: 1rem 2rem;
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand-link {
  align-items: center;
  color: inherit;
  display: flex;
  gap: 0.85rem;
  text-decoration: none;
}

.brand-logo {
  border-radius: 12px;
  height: 52px;
  object-fit: cover;
  width: 52px;
}

.brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  margin: 0;
}

.brand-tagline {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.topbar__actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: flex-end;
}

.welcome {
  color: var(--muted);
  font-size: 0.95rem;
}

.page {
  margin: 0 auto;
  max-width: 980px;
  padding: 1.5rem 1rem 3rem;
}

.hero,
.section,
.form-card,
.reading-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 8px 30px rgba(65, 46, 120, 0.06);
  padding: 1.15rem 1.25rem;
}

.hero h1,
.section h1 {
  margin-top: 0;
}

.section {
  margin-top: 1.1rem;
}

.card-grid {
  display: grid;
  gap: 0.9rem;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
}

.card {
  background: #fffdfc;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 0.9rem;
}

.card h3 {
  margin-top: 0.1rem;
}

.card__meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.card__actions {
  align-items: center;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.8rem;
}

.btn {
  appearance: none;
  border: 1px solid transparent;
  border-radius: 999px;
  cursor: pointer;
  display: inline-block;
  font-size: 0.92rem;
  font-weight: 700;
  padding: 0.45rem 0.95rem;
  text-decoration: none;
}

.btn--primary {
  background: var(--primary);
  color: #fff;
}

.btn--primary:hover {
  background: var(--primary-dark);
}

.btn--ghost {
  background: var(--ghost);
  border-color: var(--line);
  color: var(--ink);
}

.btn--success {
  background: var(--success);
  color: #fff;
}

.btn--warning {
  background: var(--warning);
  color: #fff;
}

.btn--small {
  font-size: 0.82rem;
  padding: 0.32rem 0.72rem;
}

.pill {
  background: #f4f1ff;
  border: 1px solid #d8d1ff;
  border-radius: 999px;
  color: #533dc2;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
}

.flash {
  border-radius: 12px;
  margin: 0.35rem 0 0.7rem;
  padding: 0.75rem 0.95rem;
}

.flash--notice {
  background: #ebfff7;
  border: 1px solid #b8efd8;
}

.flash--alert {
  background: #fff4ef;
  border: 1px solid #ffd3c2;
}

.field {
  margin-top: 0.85rem;
}

.field__label {
  display: block;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

.field__input {
  border: 1px solid #cac3f7;
  border-radius: 12px;
  font: inherit;
  padding: 0.6rem 0.7rem;
  width: 100%;
}

.field__input--textarea {
  resize: vertical;
}

.field__trix {
  background: #fff;
  border: 1px solid #cac3f7;
  border-radius: 12px;
  min-height: 230px;
}

.trix-button-group {
  border-radius: 10px;
}

.actions {
  margin-top: 1rem;
}

.chapter-list {
  display: grid;
  gap: 0.6rem;
  padding-left: 1.2rem;
}

.chapter-list li {
  align-items: center;
  background: #fdfcff;
  border: 1px solid var(--line);
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  padding: 0.55rem 0.65rem;
}

.chapter-actions {
  display: inline-flex;
  gap: 0.3rem;
}

.reading-card h1 {
  margin-top: 0.35rem;
}

.reading-content {
  font-size: 1.05rem;
  line-height: 1.8;
}

.empty-state {
  color: var(--muted);
  margin-top: 0.6rem;
}

.error-box {
  background: #fff5f5;
  border: 1px solid #ffcfcf;
  border-radius: 12px;
  padding: 0.6rem 0.8rem;
}

.error-box h2 {
  font-size: 1rem;
  margin-top: 0;
}

@media (max-width: 700px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.9rem 1rem;
  }

  .chapter-list li {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.45rem;
  }
}