/* [hidden] must always win: several components below (.badge, .chat-footer, ...) set
 * `display: inline-block`/`flex` at equal specificity, which -- without `!important` --
 * would beat the UA [hidden] rule by source order and show elements JS has hidden. */
[hidden] {
  display: none !important;
}

:root {
  --color-bg: #f7f7f5;
  --color-surface: #ffffff;
  --color-text: #1c1c1e;
  --color-muted: #6b6b70;
  --color-border: #dedede;
  --color-primary: #2f5d50;
  --color-primary-contrast: #ffffff;
  --color-danger: #b3261e;
  --color-warning: #8a5a00;
  --color-warning-bg: #fff3cd;
  --color-danger-bg: #fbe4e2;
  --color-success: #1b7a4f;
  --radius: 8px;
  --spacing: 1rem;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #16171a;
    --color-surface: #212226;
    --color-text: #f0f0f0;
    --color-muted: #a3a3aa;
    --color-border: #35363b;
    --color-primary: #6fb79a;
    --color-primary-contrast: #0d1210;
    --color-warning-bg: #3a2f0a;
    --color-danger-bg: #3a1614;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

a {
  color: var(--color-primary);
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing);
  padding: 0.75rem var(--spacing);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header .brand {
  font-weight: 700;
  text-decoration: none;
  color: var(--color-text);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.content {
  max-width: 960px;
  margin: 0 auto;
  padding: var(--spacing);
}

h1, h2 {
  line-height: 1.2;
}

.btn, button, .link-button {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  font: inherit;
  text-decoration: none;
}

.btn-primary, button[type="submit"] {
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  border-color: var(--color-primary);
}

.btn-danger, .btn-danger[type="submit"] {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger);
}

.link-button {
  background: none;
  border: none;
  padding: 0;
  text-decoration: underline;
  color: var(--color-muted);
}

.inline-form {
  display: inline;
}

.badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.badge-status-ready { color: var(--color-success); border-color: var(--color-success); }
.badge-status-failed { color: var(--color-danger); border-color: var(--color-danger); }
.badge-status-ingesting,
.badge-status-uploaded { color: var(--color-warning); border-color: var(--color-warning); }

.days-left {
  margin-left: 0.5rem;
  color: var(--color-muted);
  font-size: 0.9rem;
}

.banner {
  padding: 0.75rem var(--spacing);
  border-radius: var(--radius);
  margin: 1rem 0;
}

.banner-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.banner-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 0.5rem 0 1.5rem;
  background: var(--color-surface);
}

th, td {
  text-align: left;
  padding: 0.5rem 0.6rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
}

.row-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  margin-bottom: 0.75rem;
  background: var(--color-surface);
}

.drop-zone.dragover {
  border-color: var(--color-primary);
  background: var(--color-warning-bg);
}

.drop-zone label {
  display: block;
  color: var(--color-muted);
  cursor: pointer;
}

form {
  margin: 0.5rem 0;
}

textarea, select, input[type="file"], input[type="text"] {
  font: inherit;
  padding: 0.4rem;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  width: 100%;
  max-width: 480px;
}

.upload-messages {
  list-style: none;
  padding: 0;
  margin: 0 0 0.75rem;
}

.upload-messages li {
  padding: 0.4rem 0.6rem;
  border-radius: var(--radius);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  margin-bottom: 0.3rem;
  font-size: 0.9rem;
}

.flash {
  padding: 0.6rem 0.8rem;
  border-radius: var(--radius);
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.flash-error {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.privacy-note ul {
  padding-left: 1.2rem;
}

.workspace-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.workspace-actions {
  display: flex;
  gap: 0.5rem;
}

@media (max-width: 900px) {
  .site-header {
    flex-direction: column;
    align-items: flex-start;
  }

  .workspace-header {
    flex-direction: column;
    align-items: flex-start;
  }

  table, thead, tbody, th, td, tr {
    display: block;
  }

  thead {
    display: none;
  }

  tbody tr {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-bottom: 0.75rem;
    padding: 0.5rem;
  }

  td {
    border-bottom: none;
    padding: 0.25rem 0;
  }

  .row-actions {
    flex-wrap: wrap;
  }
}

/* --- Task 7b: chat page ---------------------------------------------- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.chat-toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.chat-subtitle {
  color: var(--color-muted);
  margin: 0.25rem 0 0;
}

.model-selector {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 220px;
}

.model-selector select {
  max-width: none;
}

.self-hosted-link {
  font-size: 0.9rem;
}

.self-hosted-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  margin-bottom: 1rem;
}

.chat-layout {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.chat-conversation {
  flex: 2;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.chat-messages {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  min-height: 200px;
}

.chat-empty {
  color: var(--color-muted);
}

.chat-bubble {
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  max-width: 90%;
}

.chat-bubble-user {
  align-self: flex-end;
  background: var(--color-primary);
  color: var(--color-primary-contrast);
  border-color: var(--color-primary);
}

.chat-bubble-assistant {
  align-self: flex-start;
  background: var(--color-surface);
}

.chat-text {
  white-space: pre-wrap;
  word-break: break-word;
}

.chat-note {
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.chat-note-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.chat-note-error {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.chat-footer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-muted);
}

.feedback-btn {
  padding: 0.15rem 0.5rem;
  font-size: 0.95rem;
}

.feedback-selected {
  border-color: var(--color-primary);
}

.citation-chip {
  display: inline-block;
  padding: 0 0.35rem;
  margin: 0 0.1rem;
  border-radius: 999px;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  background: var(--color-surface);
  font-size: 0.85rem;
  cursor: pointer;
}

.chat-form {
  display: flex;
  gap: 0.5rem;
  align-items: flex-end;
}

.chat-form textarea {
  max-width: none;
  flex: 1;
  min-height: 3rem;
}

.why-panel {
  flex: 1;
  min-width: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
  position: sticky;
  top: 1rem;
  max-height: 80vh;
  overflow-y: auto;
}

.why-empty {
  color: var(--color-muted);
}

.why-item {
  border-bottom: 1px solid var(--color-border);
  padding: 0.6rem 0;
}

.why-item:last-child {
  border-bottom: none;
}

.why-item-highlighted {
  background: var(--color-warning-bg);
  border-radius: var(--radius);
  padding-left: 0.4rem;
  padding-right: 0.4rem;
}

.why-item-head {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex-wrap: wrap;
}

.why-rank {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.why-title {
  font-weight: 600;
}

.why-cited-badge {
  color: var(--color-success);
  border-color: var(--color-success);
}

.why-meta {
  color: var(--color-muted);
  font-size: 0.85rem;
  margin: 0.15rem 0;
}

.why-score-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8rem;
  margin: 0.15rem 0;
}

.why-score-label {
  color: var(--color-muted);
  min-width: 90px;
}

.why-score-bar {
  flex: 1;
  height: 0.5rem;
}

.why-excerpt {
  margin-top: 0.35rem;
  font-size: 0.85rem;
}

.why-excerpt-text {
  white-space: pre-wrap;
}

.why-excerpt-text mark {
  background: var(--color-warning-bg);
  color: var(--color-text);
}

@media (max-width: 900px) {
  .chat-layout {
    flex-direction: column;
  }

  .why-panel {
    position: static;
    max-height: none;
    width: 100%;
  }
}

/* --- Task 7b: admin -------------------------------------------------- */

.admin-nav,
.admin-subnav {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.admin-subnav a.active {
  font-weight: 700;
  text-decoration: underline;
}

.admin-table {
  width: 100%;
}

.admin-section {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
}

.admin-section summary {
  cursor: pointer;
  font-weight: 600;
}

.admin-form {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 480px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  width: auto;
}

.checkbox-label input {
  width: auto;
}

.copy-field {
  max-width: 100%;
  font-family: monospace;
}

.query-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  padding: 0.75rem 1rem;
  margin-bottom: 0.75rem;
}

.query-meta {
  color: var(--color-muted);
  font-size: 0.85rem;
}

.pagination {
  display: flex;
  gap: 1rem;
}