:root {
  --bg: #f6f4ef;
  --paper: #fffdf8;
  --text: #18202a;
  --muted: #4b5a68;
  --line: #dde4ea;
  --primary: #0f6a76;
  --primary-2: #d8792e;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: "Manrope", "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top right, rgba(15, 106, 118, 0.1), transparent 35%),
    radial-gradient(circle at bottom left, rgba(216, 121, 46, 0.1), transparent 35%),
    var(--bg);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Literata", Georgia, serif;
}

a {
  color: inherit;
}

.app {
  width: min(1080px, calc(100% - 2rem));
  margin: 0 auto;
  padding-bottom: 3rem;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
  padding: 0.8rem 0;
  background: rgba(246, 244, 239, 0.88);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-weight: 800;
  letter-spacing: 0.01em;
}

.brand img {
  width: auto;
  height: 2.35rem;
  padding: 0.2rem 0.38rem;
  border-radius: 0.4rem;
  border: 0;
  background: #18202a;
  object-fit: contain;
}

.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.quick-links a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--muted);
}

.quick-links a:hover {
  color: var(--text);
}

.hero {
  padding: 2.5rem 0 2rem;
  border-bottom: 1px solid var(--line);
}

.kicker {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 700;
}

.hero h1 {
  margin-top: 0.65rem;
  font-size: clamp(2.1rem, 5.5vw, 3.8rem);
  max-width: 20ch;
}

.lead {
  margin: 1rem 0 0;
  color: var(--muted);
  line-height: 1.7;
  max-width: 70ch;
}

.hero-actions {
  margin-top: 1.35rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.72rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  text-decoration: none;
  font-weight: 700;
  font-size: 0.95rem;
}

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

.btn-ghost {
  background: transparent;
}

.preview-btn {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--muted);
  cursor: pointer;
  font: inherit;
}

.preview-btn:hover {
  color: var(--text);
}

.section {
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--line);
}

.section h2 {
  font-size: clamp(1.55rem, 3.5vw, 2.4rem);
}

.section h3 {
  margin: 0;
  font-size: 1.15rem;
}

.text-flow {
  margin-top: 0.85rem;
  display: grid;
  gap: 0.75rem;
}

.text-flow p {
  margin: 0;
  line-height: 1.75;
  color: var(--muted);
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.9rem;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.section-note {
  margin: 0.75rem 0 0;
  color: var(--muted);
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.filter-row button {
  padding: 0.45rem 0.85rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper);
  cursor: pointer;
  font: inherit;
  color: var(--muted);
}

.filter-row button.active {
  background: #d9ecee;
  color: #14454d;
  border-color: #afced2;
}

.library-list {
  margin-top: 1rem;
  display: grid;
  gap: 1rem;
}

.entry {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 1rem;
  align-items: start;
  padding-bottom: 1rem;
  border-bottom: 1px dashed var(--line);
}

.entry:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.entry img {
  width: 100%;
  height: 120px;
  object-fit: cover;
  border-radius: 0.6rem;
  border: 1px solid var(--line);
  background: #e9ecef;
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.35rem;
}

.chip {
  display: inline-flex;
  padding: 0.2rem 0.5rem;
  border-radius: 999px;
  background: #eef2f5;
  color: #445464;
  font-size: 0.78rem;
}

.entry h3 {
  margin: 0;
}

.entry p {
  margin: 0.55rem 0 0;
  color: var(--muted);
  line-height: 1.65;
}

.entry-links {
  margin-top: 0.7rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.entry-links a {
  font-size: 0.9rem;
  color: var(--primary);
  text-decoration: none;
}

.entry-links button {
  padding: 0;
  border: 0;
  background: transparent;
  color: var(--primary);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.entry-links a:hover {
  text-decoration: underline;
}

.entry-links button:hover {
  text-decoration: underline;
}

.entry-children {
  margin-top: 0.65rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.child-item {
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  border: 1px solid #c9d6df;
  background: #f5f9fc;
  color: #355064;
  font: inherit;
  font-size: 0.78rem;
  cursor: pointer;
}

.child-item:hover {
  background: #e8f1f7;
}

.links-grid {
  margin-top: 0.9rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.links-grid ul {
  list-style: none;
  padding: 0;
  margin: 0.7rem 0 0;
  display: grid;
  gap: 0.4rem;
}

.links-grid a {
  color: var(--primary);
  text-decoration: none;
  word-break: break-word;
}

.links-grid a:hover {
  text-decoration: underline;
}

.footer {
  padding-top: 1.2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.8rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  z-index: 30;
}

.modal.open {
  display: block;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(14, 20, 29, 0.55);
}

.modal-dialog {
  position: relative;
  width: min(760px, calc(100% - 1.5rem));
  max-height: calc(100vh - 2rem);
  overflow: auto;
  margin: 1rem auto;
  padding: 1rem;
  border-radius: 0.75rem;
  border: 1px solid var(--line);
  background: var(--paper);
}

.modal-close {
  position: sticky;
  top: 0;
  margin-left: auto;
  display: block;
  width: 2rem;
  height: 2rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: #ffffff;
  cursor: pointer;
}

.modal-content {
  margin-top: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
}

.modal-content p {
  margin: 0 0 0.65rem;
}

.modal-content ul {
  margin: 0;
  padding-left: 1rem;
}

.modal-content li {
  margin: 0 0 0.45rem;
}

.modal-content a {
  color: var(--primary);
  word-break: break-word;
}

@media (max-width: 800px) {
  .entry {
    grid-template-columns: 1fr;
  }

  .entry img {
    height: 180px;
  }

  .links-grid {
    grid-template-columns: 1fr;
  }
}