/* Reset and base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: #1a1a1a;
  background: #f5f5f5;
  display: flex;
  flex-direction: column;
  height: 100vh;
}

/* Header */
header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: #1a1a2e;
  color: #fff;
  position: relative;
  z-index: 20;
}

#header-title {
  font-size: 1.25rem;
  white-space: nowrap;
  cursor: pointer;
  transition: opacity 0.15s;
}

#header-title:hover {
  opacity: 0.85;
}

#search-area {
  flex: 1;
  max-width: 600px;
  margin-left: auto;
  position: relative;
}

#search-form {
  display: flex;
}

.search-wrapper {
  flex: 1;
  position: relative;
  display: flex;
}

#search-input {
  flex: 1;
  padding: 0.5rem 2rem 0.5rem 0.75rem;
  border: none;
  border-radius: 4px 0 0 4px;
  font-size: 0.95rem;
  outline: none;
}

.search-clear {
  position: absolute;
  right: 0.4rem;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #999;
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0 0.25rem;
  line-height: 1;
  transition: color 0.15s;
}

.search-clear:hover {
  color: #333;
}

#search-btn {
  padding: 0.5rem 1.25rem;
  border: none;
  border-radius: 0 4px 4px 0;
  background: #e94560;
  color: #fff;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background 0.2s;
}

#search-btn:hover {
  background: #c73e54;
}

#search-btn:disabled {
  background: #999;
  cursor: not-allowed;
}

/* Sidebar toggle (mobile only) */
.sidebar-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
}

/* Query history dropdown */
.history-dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 0 0 4px 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  z-index: 30;
  max-height: 300px;
  overflow-y: auto;
}

.history-item {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 0.9rem;
  color: #333;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: background 0.1s;
}

.history-item:hover {
  background: #f0f0f0;
}

.history-clear {
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  font-size: 0.8rem;
  color: #e94560;
  border-top: 1px solid #eee;
  text-align: center;
  transition: background 0.1s;
}

.history-clear:hover {
  background: #fdf0ef;
}

/* Main layout */
main {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ADR list sidebar */
#adr-list {
  width: 280px;
  min-width: 220px;
  background: #fff;
  border-right: 1px solid #ddd;
  overflow-y: auto;
  padding: 0.75rem 0;
  display: flex;
  flex-direction: column;
}

#adr-list h2 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #888;
  padding: 0 1rem 0.5rem;
}

/* Filter bar */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0 0.75rem 0.5rem;
}

.filter-btn {
  padding: 0.2rem 0.5rem;
  border: 1px solid #ddd;
  border-radius: 3px;
  background: #fff;
  color: #666;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.15s;
}

.filter-btn:hover {
  border-color: #e94560;
  color: #e94560;
}

.filter-btn.active {
  background: #e94560;
  color: #fff;
  border-color: #e94560;
}

/* Sort bar */
.sort-bar {
  padding: 0 0.75rem 0.5rem;
}

.sort-bar select {
  width: 100%;
  padding: 0.25rem 0.4rem;
  border: 1px solid #ddd;
  border-radius: 3px;
  font-size: 0.8rem;
  color: #444;
  background: #fff;
  cursor: pointer;
}

/* ADR list items */
#adr-list-items {
  list-style: none;
  flex: 1;
  overflow-y: auto;
}

#adr-list-items li {
  padding: 0.5rem 1rem;
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: background 0.15s, border-color 0.15s;
  font-size: 0.9rem;
}

#adr-list-items li:hover {
  background: #f0f0f0;
}

#adr-list-items li.active {
  background: #eef;
  border-left-color: #e94560;
}

.adr-list-number {
  font-weight: 600;
  color: #1a1a2e;
}

.adr-list-title {
  color: #444;
  margin-left: 0.25rem;
}

.adr-list-empty {
  padding: 1rem;
  color: #888;
  font-style: italic;
}

.adr-list-empty a {
  color: #e94560;
  text-decoration: none;
}

.adr-list-empty a:hover {
  text-decoration: underline;
}

/* Status badges */
.badge {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  border-radius: 3px;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: capitalize;
  letter-spacing: 0.02em;
  vertical-align: middle;
  margin-top: 0.15rem;
}

.badge-accepted {
  background: #27ae60;
  color: #fff;
}

.badge-proposed {
  background: #2980b9;
  color: #fff;
}

.badge-deprecated {
  background: #e67e22;
  color: #fff;
}

.badge-superseded {
  background: #95a5a6;
  color: #fff;
}

.badge-unknown {
  background: #bdc3c7;
  color: #fff;
}

/* Content area */
#content-area {
  flex: 1;
  overflow-y: auto;
  padding: 1.5rem;
  background: #fff;
}

/* Breadcrumb */
.breadcrumb {
  padding: 0.4rem 0;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: #888;
  border-bottom: 1px solid #eee;
}

.breadcrumb-sep {
  margin: 0 0.35rem;
  color: #ccc;
}

.breadcrumb-link {
  color: #2980b9;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.15s;
}

.breadcrumb-link:hover {
  color: #e94560;
  text-decoration: underline;
}

.breadcrumb-link.current {
  color: #444;
  font-weight: 600;
  cursor: default;
  text-decoration: none;
}

/* About content */
#about-content h2 {
  margin-bottom: 0.25rem;
  color: #1a1a2e;
}

#about-content .about-tagline {
  font-size: 1.05rem;
  color: #666;
  margin-bottom: 1.25rem;
}

#about-content h3 {
  margin-top: 1.25rem;
  margin-bottom: 0.4rem;
  color: #1a1a2e;
  font-size: 1rem;
}

#about-content p {
  margin-bottom: 0.75rem;
  line-height: 1.6;
  color: #333;
}

#about-content ul {
  margin: 0.4rem 0 0.75rem 1.25rem;
  line-height: 1.6;
  color: #333;
}

#about-content li {
  margin-bottom: 0.4rem;
}

#about-content code {
  background: #f0f0f0;
  padding: 0.1rem 0.35rem;
  border-radius: 3px;
  font-size: 0.9em;
}

.about-queries li {
  font-style: italic;
  color: #444;
  margin-bottom: 0.5rem;
  cursor: pointer;
  transition: color 0.15s;
}

.about-queries li:hover {
  color: #e94560;
}

.about-author {
  margin-top: 1.5rem;
  font-style: italic;
  color: #666;
}

#about-content a {
  color: #e94560;
  text-decoration: none;
}

#about-content a:hover {
  text-decoration: underline;
}

/* Answer view */
#answer-view {
  line-height: 1.6;
  overflow-wrap: break-word;
}

.answer-loading {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: #666;
  padding: 1rem 0;
}

.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid #ddd;
  border-top-color: #e94560;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

#answer-content h1, #answer-content h2, #answer-content h3 {
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
}

#answer-content p {
  margin-bottom: 0.5rem;
}

#answer-content code {
  background: #f0f0f0;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.9em;
}

#answer-content pre {
  background: #f0f0f0;
  padding: 0.75rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 0.5rem 0;
}

/* Citation summary */
#answer-citations {
  margin-top: 0.75rem;
  padding-top: 0.5rem;
  border-top: 1px solid #eee;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.citation-link {
  display: inline-block;
  padding: 0.2rem 0.5rem;
  background: #e8e8e8;
  border-radius: 3px;
  color: #1a1a2e;
  text-decoration: none;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.15s;
}

.citation-link:hover {
  background: #d0d0d0;
}

/* Inline citation links */
.citation-inline {
  color: #2980b9;
  text-decoration: none;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.15s;
}

.citation-inline:hover {
  color: #e94560;
  text-decoration: underline;
}

/* ADR detail view */
.adr-detail-header {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid #eee;
}

.adr-detail-header h1 {
  font-size: 1.3rem;
  margin: 0;
}

.adr-detail-date {
  font-size: 0.85rem;
  color: #888;
}

#adr-detail h1, #adr-detail h2, #adr-detail h3 {
  margin-top: 1rem;
  margin-bottom: 0.25rem;
}

#adr-detail h1:first-child {
  margin-top: 0;
}

#adr-detail p {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

#adr-detail ul, #adr-detail ol {
  margin: 0.5rem 0 0.5rem 1.5rem;
}

#adr-detail li {
  margin-bottom: 0.25rem;
}

#adr-detail code {
  background: #f0f0f0;
  padding: 0.1rem 0.3rem;
  border-radius: 3px;
  font-size: 0.9em;
}

#adr-detail pre {
  background: #f0f0f0;
  padding: 0.75rem;
  border-radius: 4px;
  overflow-x: auto;
  margin: 0.5rem 0;
}

#adr-detail strong {
  font-weight: 600;
}

/* Error messages */
.error-msg {
  color: #c0392b;
  padding: 0.5rem;
  background: #fdf0ef;
  border-radius: 4px;
}

.error-container {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.5rem;
}

.retry-btn {
  padding: 0.35rem 0.75rem;
  border: 1px solid #e94560;
  border-radius: 4px;
  background: #fff;
  color: #e94560;
  font-size: 0.85rem;
  cursor: pointer;
  transition: all 0.15s;
}

.retry-btn:hover {
  background: #e94560;
  color: #fff;
}

/* ADR Relationships */
.adr-relationships {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid #e0e0e0;
}

.adr-relationships h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
  color: #2c3e50;
}

.adr-relationships h4 {
  font-size: 0.9rem;
  color: #7f8c8d;
  margin: 0.5rem 0 0.25rem;
}

.adr-relationships ul {
  list-style: none;
  padding-left: 0;
}

.adr-relationships li {
  margin: 0.25rem 0;
}

.rel-link {
  color: #2980b9;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.15s;
}

.rel-link:hover {
  color: #e94560;
  text-decoration: underline;
}

/* Loading skeleton */
.skeleton-item {
  padding: 0.75rem 1rem;
}

.skeleton-line {
  height: 0.75rem;
  background: linear-gradient(90deg, #eee 25%, #ddd 50%, #eee 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: 3px;
  margin-bottom: 0.4rem;
}

.skeleton-short {
  width: 60%;
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Noscript */
.noscript-msg {
  padding: 2rem;
  text-align: center;
  font-size: 1.1rem;
  color: #c0392b;
}

/* Alpine transitions */
[x-cloak] { display: none !important; }

/* Responsive layout */
@media (max-width: 768px) {
  header {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
  }

  .sidebar-toggle {
    display: block;
    order: -1;
  }

  #header-title {
    font-size: 1.1rem;
  }

  #search-area {
    order: 3;
    max-width: 100%;
    flex-basis: 100%;
  }

  #adr-list {
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    width: 280px;
    z-index: 100;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: none;
    padding-top: 3.5rem;
  }

  #adr-list.sidebar-open {
    transform: translateX(0);
    box-shadow: 4px 0 16px rgba(0,0,0,0.15);
  }

  #content-area {
    padding: 1rem;
  }

}