:root {
  --bg: #f6efe5;
  --bg-strong: #eadbc8;
  --panel: rgba(255, 249, 241, 0.82);
  --line: rgba(89, 65, 38, 0.14);
  --text: #2e241c;
  --muted: #6f6051;
  --accent: #bf5a36;
  --accent-dark: #8d3f22;
  --success: #32694d;
  --danger: #9a2f2f;
  --shadow: 0 24px 70px rgba(75, 49, 24, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Noto Serif SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(191, 90, 54, 0.22), transparent 28%),
    radial-gradient(circle at bottom right, rgba(144, 103, 60, 0.18), transparent 22%),
    linear-gradient(135deg, #f7f0e7, #f0e0c8 52%, #e5d4c0);
  min-height: 100vh;
  padding: 20px 0 30px;
}

.site-header {
  width: min(1500px, calc(100vw - 32px));
  margin: 0 auto 14px;
  padding: 16px 0 0;
}

.site-header-top {
  position: relative;
  display: grid;
  grid-template-columns: minmax(380px, 0.95fr) minmax(0, 1.35fr);
  gap: 20px;
  align-items: stretch;
  padding: 26px 30px;
  border-radius: 32px;
  background:
    radial-gradient(circle at left top, rgba(191, 90, 54, 0.12), transparent 34%),
    linear-gradient(135deg, rgba(255, 250, 243, 0.92), rgba(246, 235, 218, 0.88));
  border: 1px solid rgba(89, 65, 38, 0.1);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.site-header-top::after {
  content: "";
  position: absolute;
  right: -30px;
  top: -28px;
  width: 180px;
  height: 180px;
  border-radius: 999px;
  background: radial-gradient(circle, rgba(191, 90, 54, 0.12), rgba(191, 90, 54, 0));
  pointer-events: none;
}

.site-header-top.authed .site-header-main {
  grid-column: 1;
}

.site-header-main {
  min-width: 0;
  grid-column: 1 / -1;
  position: relative;
  z-index: 1;
  max-width: 700px;
}

.site-kicker {
  display: inline-flex;
  align-items: center;
  margin: 0 0 10px;
  padding: 6px 11px;
  border-radius: 999px;
  color: var(--accent-dark);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: none;
  background: rgba(191, 90, 54, 0.1);
  border: 1px solid rgba(191, 90, 54, 0.12);
}

.site-header h1 {
  margin: 0;
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.site-header-note {
  max-width: 560px;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.site-header-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.site-header-tag {
  display: inline-flex;
  align-items: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(89, 65, 38, 0.08);
  color: var(--text);
  font-size: 13px;
}

.site-subtitle {
  max-width: 880px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.hero-band {
  margin-top: 24px;
  padding: 26px 28px;
  border-radius: 28px;
  background: var(--panel);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  display: grid;
  grid-template-columns: minmax(320px, 1.05fr) minmax(0, 1.25fr);
  gap: 18px;
  align-items: stretch;
}

.hero-band-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-shell {
  width: min(1500px, calc(100vw - 32px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(380px, 0.95fr) minmax(0, 1.35fr);
  gap: 24px;
  align-items: start;
}

.upload-panel,
.card {
  background: var(--panel);
  backdrop-filter: blur(14px);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.upload-panel {
  border-radius: 28px;
  padding: 30px;
  align-self: start;
  position: sticky;
  top: 24px;
  min-height: 760px;
}

.eyebrow {
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--muted);
  margin: 0 0 12px;
}

h1,
h2,
h3,
strong {
  font-family: "Songti SC", "STSong", serif;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.08;
}

h2 {
  margin: 0;
  font-size: clamp(26px, 3vw, 40px);
  line-height: 1.16;
}

.hero-copy {
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 560px;
}

.hero-cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.mini-card {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(89, 65, 38, 0.08);
}

.mini-card span {
  display: inline-flex;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  align-items: center;
  justify-content: center;
  background: rgba(191, 90, 54, 0.12);
  color: var(--accent-dark);
  margin-bottom: 10px;
  font-weight: 700;
}

.app-panel {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.card {
  border-radius: 26px;
  padding: 28px;
}

.card-head h2,
.card-head h3 {
  margin: 0 0 6px;
}

.card-head p {
  margin: 0;
  color: var(--muted);
}

.form-grid,
.upload-box,
.chat-form {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

label span {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
}

input,
select,
textarea,
button {
  font: inherit;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid rgba(89, 65, 38, 0.14);
  background: rgba(255, 255, 255, 0.74);
  border-radius: 16px;
  padding: 14px 16px;
  color: var(--text);
}

textarea {
  resize: vertical;
  min-height: 110px;
}

button {
  border: none;
  border-radius: 16px;
  padding: 14px 18px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: white;
  cursor: pointer;
  transition: transform 0.18s ease, opacity 0.18s ease;
}

button:hover {
  transform: translateY(-1px);
}

button.ghost {
  background: rgba(255, 255, 255, 0.58);
  color: var(--text);
  border: 1px solid rgba(89, 65, 38, 0.12);
}

button.small {
  padding: 10px 12px;
  border-radius: 12px;
}

button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.danger-btn {
  border: none;
  border-radius: 12px;
  padding: 10px 12px;
  background: rgba(154, 47, 47, 0.12);
  color: var(--danger);
  cursor: pointer;
}

.actions,
.status-pills {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.dashboard {
  display: grid;
  gap: 18px;
}

.status-strip {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}

.site-header-top .status-strip {
  margin-left: auto;
  width: 100%;
  align-self: end;
  min-height: 100%;
  position: relative;
  z-index: 1;
}

.pill {
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(191, 90, 54, 0.12);
  color: var(--accent-dark);
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: stretch;
}

.upload-card {
  min-height: 340px;
}

.file-list,
.chat-log {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.file-item,
.chat-bubble {
  border-radius: 18px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(89, 65, 38, 0.08);
}

.chat-bubble p {
  margin: 10px 0 0;
  line-height: 1.7;
  white-space: pre-wrap;
}

.chat-sources {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid rgba(89, 65, 38, 0.08);
}

.chat-sources strong {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--muted);
}

.chat-source-list {
  margin: 10px 0 0;
  padding-left: 18px;
  color: var(--muted);
}

.chat-source-item + .chat-source-item {
  margin-top: 10px;
}

.chat-source-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.chat-source-name {
  color: var(--text);
  font-weight: 600;
}

.chat-source-page {
  flex-shrink: 0;
  font-size: 12px;
  color: var(--muted);
}

.chat-source-details {
  margin-top: 8px;
}

.chat-source-details summary {
  cursor: pointer;
  color: var(--accent-dark);
  font-size: 13px;
}

.chat-source-details p {
  margin-top: 8px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

.file-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.file-main {
  display: grid;
  gap: 10px;
  min-width: 0;
  flex: 1;
}

.file-preview {
  width: min(220px, 100%);
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(89, 65, 38, 0.08);
  background: rgba(255, 255, 255, 0.7);
  cursor: zoom-in;
}

.file-preview img,
.file-preview video {
  display: block;
  width: 100%;
  height: 132px;
  object-fit: cover;
  background: rgba(235, 223, 209, 0.6);
}

.file-preview-placeholder {
  height: 132px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-size: 13px;
}

.file-side,
.file-meta {
  display: grid;
  gap: 8px;
  justify-items: end;
  text-align: right;
}

.file-delete-btn {
  min-width: 72px;
}

.file-item.clickable {
  cursor: pointer;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.file-item.clickable:hover {
  transform: translateY(-1px);
  border-color: rgba(191, 90, 54, 0.24);
}

.file-item.selected {
  background: rgba(191, 90, 54, 0.12);
  border-color: rgba(191, 90, 54, 0.34);
}

.file-item p,
.file-item small,
.chat-bubble p {
  margin: 6px 0 0;
  color: var(--muted);
}

.chat-card {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 760px;
}

.chat-scope-box {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.chat-scope-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.chat-scope-option {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(89, 65, 38, 0.08);
  color: var(--text);
}

.chat-scope-option input {
  width: auto;
  margin: 0;
}

.chat-file-select {
  display: grid;
  gap: 8px;
}

.chat-file-select span {
  color: var(--muted);
  font-size: 13px;
}

.web-search-toggle {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(89, 65, 38, 0.08);
}

.web-search-toggle input {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  flex-shrink: 0;
}

.web-search-toggle strong {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
}

.web-search-toggle p {
  margin: 0;
  color: var(--muted);
  line-height: 1.6;
  font-size: 13px;
}

.chat-file-select.disabled {
  opacity: 0.55;
}

.chat-log {
  align-content: start;
  overflow-y: auto;
  max-height: 520px;
}

.chat-bubble.user {
  background: rgba(191, 90, 54, 0.12);
}

.chat-bubble.thinking {
  background: rgba(255, 255, 255, 0.72);
}

.thinking-dots {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 8px;
  vertical-align: middle;
}

.thinking-dots i {
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--accent-dark);
  opacity: 0.25;
  animation: thinking-pulse 1.1s infinite ease-in-out;
}

.thinking-dots i:nth-child(2) {
  animation-delay: 0.18s;
}

.thinking-dots i:nth-child(3) {
  animation-delay: 0.36s;
}

@keyframes thinking-pulse {
  0%,
  80%,
  100% {
    opacity: 0.25;
    transform: translateY(0);
  }

  40% {
    opacity: 1;
    transform: translateY(-2px);
  }
}

.chat-bubble span {
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent-dark);
}

.message-bar {
  min-height: 24px;
  margin: 0;
  padding: 0 6px 6px;
}

.message-bar.success {
  color: var(--success);
}

.message-bar.error {
  color: var(--danger);
}

.media-lightbox {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 24px;
}

.media-lightbox-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(38, 24, 15, 0.58);
  backdrop-filter: blur(6px);
}

.media-lightbox-dialog {
  position: relative;
  z-index: 1;
  width: min(980px, calc(100vw - 32px));
  max-height: calc(100vh - 48px);
  overflow: auto;
  padding: 18px;
  border-radius: 28px;
  background: rgba(255, 249, 241, 0.95);
  border: 1px solid rgba(89, 65, 38, 0.12);
  box-shadow: 0 24px 80px rgba(33, 20, 11, 0.24);
}

.media-lightbox-close {
  position: sticky;
  top: 0;
  margin-left: auto;
  display: block;
  padding: 10px 14px;
}

.media-lightbox-body {
  display: grid;
  gap: 16px;
}

.media-lightbox-meta strong {
  display: block;
  font-size: 18px;
}

.media-lightbox-meta span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.media-lightbox-media {
  border-radius: 20px;
  overflow: hidden;
  background: rgba(234, 219, 200, 0.45);
}

.media-lightbox-media img,
.media-lightbox-media video {
  display: block;
  width: 100%;
  max-height: min(72vh, 760px);
  object-fit: contain;
  background: rgba(234, 219, 200, 0.35);
}

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

.hidden {
  display: none !important;
}

@media (max-width: 980px) {
  body {
    padding-top: 18px;
  }

  .site-header {
    padding: 12px 0 0;
  }

  .site-header-top,
  .page-shell,
  .dashboard-grid {
    grid-template-columns: 1fr;
  }

  .site-header-top {
    padding: 24px 22px;
    border-radius: 30px;
  }

  .site-header h1 {
    font-size: clamp(40px, 15vw, 62px);
  }

  .site-header-note {
    font-size: 15px;
  }

  .hero-band {
    grid-template-columns: 1fr;
    padding: 22px;
  }

  .hero-cards {
    grid-template-columns: 1fr;
  }

  .upload-panel {
    position: relative;
    top: auto;
    min-height: auto;
  }

  .upload-panel,
  .card {
    padding: 22px;
  }

  .status-strip {
    align-items: flex-start;
    flex-direction: column;
  }

  .file-item {
    flex-direction: column;
  }

  .file-side,
  .file-meta {
    width: 100%;
    justify-items: start;
    text-align: left;
  }
}

.admin-body {
  min-height: 100vh;
}

.admin-shell {
  width: min(1460px, calc(100vw - 28px));
  margin: 20px auto;
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 18px;
}

.admin-sidebar {
  align-self: start;
  position: sticky;
  top: 20px;
}

.admin-nav {
  margin-top: 18px;
}

.admin-link {
  display: inline-flex;
  text-decoration: none;
}

.admin-main,
.admin-dashboard {
  display: grid;
  gap: 18px;
}

.admin-metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric-card {
  padding: 20px;
}

.metric-card span {
  display: block;
  color: var(--muted);
  margin-bottom: 10px;
}

.metric-card strong {
  display: block;
  font-size: 34px;
}

.admin-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.admin-chart-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.toolbar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.toolbar select {
  min-width: 160px;
  border: 1px solid rgba(89, 65, 38, 0.14);
  background: rgba(255, 255, 255, 0.74);
  border-radius: 16px;
  padding: 14px 16px;
  color: var(--text);
  font: inherit;
}

.table-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
}

.table-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(89, 65, 38, 0.08);
}

.table-main p {
  margin: 6px 0 0;
  color: var(--muted);
  word-break: break-word;
}

.table-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: flex-end;
}

.chart-list {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.chart-row {
  display: grid;
  gap: 8px;
}

.chart-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.chart-meta span {
  color: var(--muted);
}

.chart-bar {
  height: 12px;
  border-radius: 999px;
  background: rgba(89, 65, 38, 0.08);
  overflow: hidden;
}

.chart-bar i {
  display: block;
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
}

.pager {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 16px;
  color: var(--muted);
}

@media (max-width: 1180px) {
  .admin-shell,
  .admin-grid,
  .admin-chart-grid,
  .admin-metrics {
    grid-template-columns: 1fr;
  }

  .admin-sidebar {
    position: static;
  }

  .table-row {
    grid-template-columns: 1fr;
  }

  .table-actions {
    align-items: stretch;
  }
}