/* ===== Adams Chart Visual Companion - styles ===== */

:root {
  --bg: #f5ecd7;            /* cream / parchment */
  --bg-alt: #efe3c4;        /* slightly darker parchment */
  --text: #2b2417;          /* warm dark brown */
  --title: #1a3a6b;         /* dark blue */
  --accent: #8a5a2b;        /* warm accent */
  --border: #c9b58a;
  --btn-bg: #ffffff;
  --btn-bg-hover: #1a3a6b;
  --btn-text: #1a3a6b;
  --btn-text-hover: #ffffff;
  --shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.5;
}

main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.25rem 2rem;
}

/* ===== Header ===== */
.site-header {
  text-align: center;
  padding: 2rem 1rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
}

.site-header h1 {
  margin: 0 0 0.5rem;
  color: var(--title);
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
  letter-spacing: 0.5px;
}

.intro {
  margin: 0 auto;
  max-width: 720px;
  font-size: 1.05rem;
  color: var(--text);
}

/* ===== Search ===== */
.search-section {
  position: relative;
  margin: 1.5rem 0 1rem;
}

#searchInput {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  background: #fff;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
}

#searchInput:focus {
  outline: 2px solid var(--title);
  outline-offset: 1px;
}

.search-results {
  list-style: none;
  margin: 0.5rem 0 0;
  padding: 0;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
  max-height: 320px;
  overflow-y: auto;
}

.search-results li {
  padding: 0.6rem 0.9rem;
  border-bottom: 1px solid #eee;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 0.8rem;
  align-items: baseline;
}

.search-results li:last-child { border-bottom: none; }
.search-results li:hover { background: var(--bg-alt); }

.search-results .result-title {
  font-weight: bold;
  color: var(--title);
}

.search-results .result-meta {
  font-size: 0.85rem;
  color: var(--accent);
  font-style: italic;
}

.search-results .no-result {
  cursor: default;
  font-style: italic;
  color: #777;
}

.search-results .no-result:hover { background: #fff; }

/* ===== Navigation ===== */
.panel-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0;
  justify-content: center;
}

.nav-btn {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.5rem 0.9rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--title);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.nav-btn:hover {
  background: var(--btn-bg-hover);
  color: var(--btn-text-hover);
}

.nav-btn.active {
  background: var(--title);
  color: #fff;
  font-weight: bold;
}

/* ===== Viewer ===== */
.viewer-header {
  text-align: center;
  margin: 1rem 0 0.5rem;
  max-width: 820px;
  margin-left: auto;
  margin-right: auto;
}

.viewer-header h2 {
  margin: 0 0 0.15rem;
  color: var(--title);
  font-size: 1.4rem;
  letter-spacing: 0.5px;
}

.viewer-header h3 {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: normal;
  font-style: italic;
}

.viewer-header h3:empty {
  display: none;
}

.viewer-header p {
  margin: 0;
  font-size: 0.97rem;
  color: var(--text);
  line-height: 1.55;
}

.viewer {
  width: 100%;
  height: 70vh;
  background: var(--bg-alt); /* no black background */
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow);
  margin-top: 0.75rem;
}

/* Wrapper to position the loading overlay on top of the viewer */
.viewer-wrapper {
  position: relative;
}

.loading-overlay {
  position: absolute;
  inset: 0.75rem 0 0 0; /* match .viewer margin-top */
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(245, 236, 215, 0.92);
  border-radius: 6px;
  z-index: 10;
  pointer-events: none;
}

/* Honor the [hidden] attribute even when display is set elsewhere */
.loading-overlay[hidden] {
  display: none !important;
}

.loading-box {
  text-align: center;
  color: var(--title);
  font-size: 1rem;
}

.loading-box small {
  color: var(--accent);
  font-size: 0.85rem;
}

.spinner {
  width: 36px;
  height: 36px;
  margin: 0 auto 0.75rem;
  border: 3px solid var(--border);
  border-top-color: var(--title);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* OpenSeadragon canvas inherits parent bg via this */
.viewer .openseadragon-container {
  background-color: var(--bg-alt) !important;
}

.viewer-note {
  text-align: center;
  font-style: italic;
  color: var(--accent);
  margin: 1rem 0;
  font-size: 0.95rem;
}

/* ===== Action buttons ===== */
.viewer-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.action-btn {
  font-family: inherit;
  font-size: 0.95rem;
  padding: 0.6rem 1rem;
  background: var(--btn-bg);
  color: var(--btn-text);
  border: 1px solid var(--title);
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.action-btn:hover {
  background: var(--btn-bg-hover);
  color: var(--btn-text-hover);
}

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

.action-btn.primary:hover {
  background: #142d54;
}

.action-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 1.25rem 1rem;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
  font-size: 0.9rem;
  color: var(--accent);
}

/* ===== Mobile ===== */
@media (max-width: 700px) {
  .viewer { height: 60vh; }
  .nav-btn { font-size: 0.85rem; padding: 0.4rem 0.7rem; }
  .action-btn { font-size: 0.9rem; padding: 0.5rem 0.8rem; }
  .site-header { padding: 1.25rem 1rem 0.75rem; }
  main { padding: 0.75rem 0.9rem 1.5rem; }
}

/* -------- Book promo banner -------- */
.book-promo {
  margin: 1.5rem auto;
  padding: 1.25rem 1.5rem;
  background: #ede0c0;
  border: 1px solid var(--accent);
  border-left: 4px solid var(--accent);
  border-radius: 4px;
  max-width: 900px;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.book-promo-text {
  flex: 1;
  margin: 0;
  font-size: 1rem;
  line-height: 1.45;
  color: var(--text);
  min-width: 240px;
}

.book-promo-text strong {
  color: var(--title);
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.05rem;
}

.book-promo-btn {
  background: var(--title);
  color: #fff;
  border: none;
  padding: 0.7rem 1.4rem;
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.2s;
}

.book-promo-btn:hover {
  background: var(--accent);
}

@media (max-width: 600px) {
  .book-promo {
    flex-direction: column;
    align-items: stretch;
  }
  .book-promo-btn {
    width: 100%;
  }
}

/* -------- Book modal -------- */
.book-modal {
  position: fixed;
  inset: 0;
  background: rgba(20, 15, 10, 0.55);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}

.book-modal[hidden] {
  display: none !important;
}

.book-modal-content {
  background: var(--bg);
  padding: 2rem 2.5rem;
  border: 1px solid var(--accent);
  border-radius: 6px;
  max-width: 480px;
  width: 100%;
  position: relative;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.book-modal-content h2 {
  color: var(--title);
  margin-top: 0;
  font-family: inherit;
}

.book-modal-content p {
  line-height: 1.55;
  color: var(--text);
}

.book-modal-hint {
  font-style: italic;
  font-size: 0.9rem;
  color: #6a5a4a;
  margin-bottom: 0;
}

.book-modal-close {
  position: absolute;
  top: 0.5rem;
  right: 0.85rem;
  background: none;
  border: none;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  color: var(--text);
}

.book-modal-close:hover {
  color: var(--title);
}