:root {
  color-scheme: dark;
  --bg: #0b1020;
  --panel: #131a2e;
  --panel-2: #1b2340;
  --border: #2a365f;
  --text: #eef2ff;
  --muted: #aab4d6;
  --accent: #68a0ff;
  --accent-2: #7cf5c7;
  --danger: #ff8080;
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #edf2ff;
  --panel: #ffffff;
  --panel-2: #eef3ff;
  --border: #cad5f2;
  --text: #14203d;
  --muted: #5a6d96;
  --accent: #2f63d8;
  --accent-2: #158f67;
  --danger: #c34141;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #152148 0%, var(--bg) 48%);
  color: var(--text);
}

.app-shell {
  display: grid;
  grid-template-columns: 0 minmax(0, 1fr);
  min-height: 100vh;
  transition: grid-template-columns 0.2s ease;
}

.app-shell[data-drawer-open="true"] {
  grid-template-columns: 320px minmax(0, 1fr);
}

.settings-panel {
  border-right: 1px solid var(--border);
  background: rgba(8, 13, 28, 0.82);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
  padding: 24px 18px 24px 24px;
  transition: padding 0.2s ease, border-color 0.2s ease;
}

.settings-panel.collapsed {
  padding-left: 0;
  padding-right: 0;
  border-right-color: transparent;
}

.settings-panel.collapsed .sidebar-content {
  opacity: 0;
  pointer-events: none;
}

.workspace-panel {
  min-width: 0;
  min-height: 100vh;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.workspace-brand-group,
.workspace-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.workspace-brand {
  white-space: nowrap;
}

.sidebar-toggle-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  font-size: 1.2rem;
}

.language-toggle {
  width: fit-content;
  padding: 8px 12px;
}

.sidebar-content {
  overflow-y: auto;
  flex: 1;
  padding-right: 6px;
  transition: opacity 0.2s ease;
}

.settings-panel h1,
.tips h2 {
  margin: 0 0 8px;
}

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

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

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

.account-card,
.chat-history-card,
.settings-card,
.tool-reference {
  margin: 22px 0 0;
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(19, 26, 46, 0.7);
}

.account-card h2,
.chat-history-card h2,
.settings-card h2,
.tool-reference h2 {
  margin: 0 0 8px;
}

.field {
  display: block;
  margin: 18px 0;
}

.field span {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.field-help {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 0.82rem;
}

.account-identity {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin: 16px 0 10px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
}

.account-identity-label {
  color: var(--muted);
  font-size: 0.9rem;
}

input,
select,
textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--panel);
  color: var(--text);
  font: inherit;
}

textarea {
  resize: vertical;
}

select {
  appearance: none;
}

.toggle-field {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
  color: var(--text);
}

.toggle-field input {
  width: auto;
  margin: 0;
}

.primary-button,
.secondary-button,
.chip {
  border: 0;
  border-radius: 999px;
  cursor: pointer;
  font: inherit;
}

.primary-button {
  padding: 12px 18px;
  background: linear-gradient(135deg, var(--accent), #8d8aff);
  color: white;
  font-weight: 600;
}

.secondary-button {
  width: 100%;
  padding: 12px 18px;
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.inline-button {
  border: 1px solid var(--border);
  background: var(--panel-2);
  color: var(--text);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font: inherit;
}

.auth-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.register-page {
  max-width: 480px;
  margin: 0 auto;
  padding: 60px 20px;
  text-align: center;
}

.register-page h2 {
  margin-bottom: 8px;
  color: var(--text);
}

.register-page .hero-copy {
  margin-bottom: 28px;
  color: var(--muted);
}

.register-page .success-message {
  background: #1a3a1a;
  border: 1px solid #2d6b2d;
  color: #7ddf7d;
  padding: 16px;
  border-radius: 12px;
  margin-bottom: 16px;
  font-size: 13px;
}

.register-page .error-message {
  background: #3a1a1a;
  border: 1px solid #6b2d2d;
  color: #df7d7d;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 16px;
  font-size: 13px;
}

.register-page label {
  display: block;
  text-align: left;
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 4px;
  margin-top: 14px;
}

.register-page input {
  width: 100%;
  box-sizing: border-box;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
  font: inherit;
  font-size: 14px;
}

.register-page .primary-button {
  width: 100%;
  margin-top: 22px;
  padding: 12px;
}

.register-page .auth-links {
  margin-top: 18px;
  font-size: 13px;
  color: var(--muted);
}

.register-page .auth-links a {
  color: var(--accent);
  text-decoration: none;
}

.register-page .auth-links a:hover {
  text-decoration: underline;
}

.register-page .pricing-box {
  background: var(--panel-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  margin-top: 24px;
}

.register-page .pricing-box .price {
  font-size: 36px;
  font-weight: 700;
  color: var(--text);
}

.register-page .pricing-box .price-sub {
  font-size: 13px;
  color: var(--muted);
}

#logout-button {
  margin-top: 10px;
}

.admin-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.admin-table th,
.admin-table td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
}

.admin-table th {
  color: var(--muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.admin-table td {
  color: var(--text);
}

.admin-table tbody tr:hover {
  background: rgba(255, 255, 255, 0.04);
}

.marketing-card p.error {
  color: #e74c3c;
}

::root[data-theme="light"] .admin-table tbody tr:hover {
  background: rgba(0, 0, 0, 0.02);
}

.tips {
  margin-top: 28px;
}

.chat-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.chat-list-button {
  width: 100%;
  text-align: left;
  padding: 12px 14px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  cursor: pointer;
}

.chat-list-button.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px rgba(104, 160, 255, 0.25);
}

.chat-list-title {
  font-weight: 600;
}

.chat-list-preview,
.chat-list-meta {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.82rem;
}

.chip {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 12px 14px;
  text-align: left;
  background: #18203b;
  color: var(--text);
  border: 1px solid var(--border);
}

.chat-panel {
  min-width: 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.messages {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding-right: 6px;
}

.settings-view {
  flex: 1;
  min-width: 0;
  overflow: auto;
  display: grid;
  align-content: start;
  gap: 20px;
  width: min(840px, 100%);
  padding-right: 6px;
}

.settings-intro {
  margin: 0;
  line-height: 1.6;
}

.settings-view .account-card,
.settings-view .settings-card,
.settings-view .tool-reference,
.settings-view .tips {
  margin-top: 0;
}

.settings-panel .chat-history-card {
  margin-top: 0;
}

.message {
  margin-bottom: 16px;
  padding: 16px 18px;
  border-radius: 18px;
  background: rgba(19, 26, 46, 0.88);
  border: 1px solid var(--border);
}

.message[data-role="user"] {
  background: rgba(30, 51, 98, 0.88);
}

.message-role {
  margin-bottom: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-2);
}

.message-body {
  line-height: 1.55;
}

.message-body > :first-child {
  margin-top: 0;
}

.message-body > :last-child {
  margin-bottom: 0;
}

.message-body p,
.message-body ul,
.message-body ol,
.message-body pre,
.message-body blockquote,
.message-body table {
  margin: 0 0 12px;
}

.message-body ul,
.message-body ol {
  padding-left: 24px;
}

.message-body pre,
.tool-trace pre {
  overflow: auto;
  max-height: 360px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0d1326;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.message-body code {
  padding: 0.15rem 0.35rem;
  border-radius: 6px;
  background: rgba(104, 160, 255, 0.16);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.message-body pre code,
.tool-trace pre {
  padding: 0;
  background: transparent;
}

.message-body blockquote {
  padding-left: 14px;
  border-left: 3px solid var(--accent);
  color: var(--muted);
}

.message-body a {
  color: var(--accent-2);
}

.message-body table {
  width: 100%;
  border-collapse: collapse;
}

.message-body th,
.message-body td {
  padding: 8px 10px;
  border: 1px solid var(--border);
  text-align: left;
}

.message-tools {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.message-map-card,
.message-image-card,
.message-chart-card,
.message-table-card,
.tool-trace,
.tool-card {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(104, 160, 255, 0.08);
  padding: 10px 12px;
}

.message-map-header,
.message-image-header,
.message-chart-header,
.message-table-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-bottom: 10px;
}

.message-map-title,
.message-image-title,
.message-chart-title,
.message-table-title {
  color: var(--text);
}

.message-map-meta,
.message-image-meta,
.message-chart-meta,
.message-table-meta {
  color: var(--muted);
  font-size: 0.86rem;
}

.message-map-link {
  margin-left: auto;
  color: var(--accent-2);
  font-size: 0.86rem;
}

.message-image-grid {
  display: grid;
  gap: 10px;
}

.message-image-source {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(8, 13, 28, 0.52);
  padding: 10px;
}

.message-image-source-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}

.message-image-source-title {
  color: var(--text);
}

.message-image-status {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.8rem;
}

.message-image-note {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.message-image-previews {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 10px;
  margin-top: 10px;
}

.message-image-figure {
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.message-image-preview {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: #0d1326;
}

.message-image-caption {
  color: var(--muted);
  font-size: 0.8rem;
}

.message-image-link {
  color: var(--accent-2);
  font-size: 0.86rem;
  text-decoration: none;
}

.message-chart-wrap {
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #0d1326;
  overflow: hidden;
}

.message-chart-svg {
  display: block;
  width: 100%;
  height: auto;
}

.message-chart-grid {
  stroke: rgba(148, 163, 184, 0.16);
  stroke-width: 1;
}

.message-chart-axis-label,
.message-chart-range-label {
  fill: var(--muted);
  font-size: 12px;
}

.message-chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: 10px;
}

.message-chart-legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(8, 13, 28, 0.52);
}

.message-chart-legend-swatch {
  width: 10px;
  height: 10px;
  border-radius: 999px;
  flex: 0 0 auto;
}

.message-chart-legend-text {
  color: var(--text);
  font-size: 0.82rem;
}

.message-map {
  height: 260px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  background: #0d1326;
}

.message-map .leaflet-control-attribution {
  background: rgba(11, 16, 32, 0.8);
  color: var(--muted);
}

.message-map .leaflet-control-attribution a {
  color: var(--accent-2);
}

.message-map-fallback-heading {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.86rem;
}

.message-map-point-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.message-map-point {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(124, 245, 199, 0.25);
  background: rgba(124, 245, 199, 0.08);
  color: #dffcf1;
  font-size: 0.8rem;
  text-decoration: none;
}

.message-table-wrap {
  overflow: auto;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #0d1326;
}

.message-tool-table {
  width: 100%;
  border-collapse: collapse;
}

.message-tool-table th,
.message-tool-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
}

.message-tool-table th {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.message-tool-table tr:last-child td {
  border-bottom: 0;
}

.tool-trace summary,
.tool-card summary {
  cursor: pointer;
  color: #cfe0ff;
  font-weight: 600;
}

.tool-card-body {
  margin-top: 12px;
}

.tool-card-body p {
  margin: 0 0 10px;
  color: var(--text);
}

.tool-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.parameter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.parameter-chip {
  display: inline-flex;
  padding: 7px 10px;
  border-radius: 999px;
  border: 1px solid rgba(124, 245, 199, 0.25);
  background: rgba(124, 245, 199, 0.08);
  color: #dffcf1;
  font-size: 0.8rem;
}

.composer {
  border: 1px solid var(--border);
  border-radius: 20px;
  background: rgba(8, 13, 28, 0.7);
  padding: 14px;
}

.composer-files {
  margin-bottom: 12px;
}

.composer-files-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.composer-files-title {
  color: var(--muted);
  font-size: 0.9rem;
}

.file-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.file-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.file-chip,
.file-delete-button {
  border-radius: 999px;
  border: 1px solid var(--border);
  font: inherit;
}

.file-chip {
  flex: 1;
  text-align: left;
  padding: 10px 12px;
  background: #18203b;
  color: var(--text);
  cursor: default;
}

.file-delete-button {
  padding: 10px 12px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
}

:root[data-theme="light"] body {
  background: radial-gradient(circle at top, #f8fbff 0%, var(--bg) 50%);
}

:root[data-theme="light"] .settings-panel {
  background: rgba(255, 255, 255, 0.9);
}

:root[data-theme="light"] .message {
  background: rgba(255, 255, 255, 0.92);
}

:root[data-theme="light"] .message[data-role="user"] {
  background: rgba(223, 235, 255, 0.95);
}

:root[data-theme="light"] .message-map {
  background: #dde8ff;
}

:root[data-theme="light"] .message-image-preview,
:root[data-theme="light"] .message-image-source {
  background: #dde8ff;
}

:root[data-theme="light"] .message-table-wrap {
  background: #dde8ff;
}

.composer textarea {
  min-height: 96px;
}

.composer-notice {
  color: var(--muted);
  font-size: 0.78rem;
  font-style: italic;
  margin: 8px 0 4px 2px;
  opacity: 0.8;
}

.composer-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 12px;
}

.status {
  color: var(--muted);
  font-size: 0.9rem;
}

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

@media (max-width: 980px) {
  .app-shell,
  .app-shell[data-drawer-open="true"] {
    grid-template-columns: 1fr;
  }

  .settings-panel {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 20;
    width: min(320px, calc(100vw - 32px));
    border-right: 1px solid var(--border);
    transform: translateX(-100%);
    transition: transform 0.2s ease;
  }

  .app-shell[data-drawer-open="true"] .settings-panel {
    transform: translateX(0);
  }

  .workspace-panel {
    padding: 18px;
  }

  .settings-view {
    width: 100%;
  }
}

.marketing-page {
  min-height: 100vh;
  padding: 24px;
}

.marketing-header,
.marketing-main {
  width: min(1080px, 100%);
  margin: 0 auto;
}

.marketing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 32px;
}

.brand-link,
.marketing-nav a,
.marketing-nav-button,
.primary-link,
.secondary-link {
  color: var(--text);
  text-decoration: none;
}

.brand-link {
  font-size: 1.35rem;
  font-weight: 700;
}

.marketing-nav {
  display: flex;
  gap: 18px;
  align-items: center;
}

.marketing-nav a,
.marketing-nav-button {
  color: var(--muted);
  background: none;
  border: 0;
  padding: 0;
  font: inherit;
  cursor: pointer;
}

.marketing-main {
  display: grid;
  gap: 24px;
}

.hero-card,
.marketing-card {
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 28px;
  background: rgba(19, 26, 46, 0.82);
  backdrop-filter: blur(14px);
}

.hero-card h1,
.marketing-card h2 {
  margin-top: 0;
}

.hero-copy {
  font-size: 1.06rem;
  line-height: 1.65;
  max-width: 590px;
  margin: 0 auto 32px;
  color: var(--muted);
}

/* Centred hero wrapper */
.hero-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  padding: 20px 0;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.primary-link,
.secondary-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 12px 18px;
  font-weight: 600;
}

.primary-link {
  background: linear-gradient(135deg, var(--accent), #8d8aff);
  color: white;
}

.secondary-link {
  border: 1px solid var(--border);
  background: var(--panel-2);
}

/* 2x2 feature cards grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 24px;
}

.feature-card {
  padding: 28px 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(19, 26, 46, 0.6);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
  border-color: var(--accent);
}

.feature-card h3 {
  margin: 0 0 10px;
  font-size: 1.1rem;
  color: var(--text);
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.6;
}

.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 1.02rem;
}
.marketing-form {
  display: grid;
  gap: 12px;
}

.auth-marketing-card {
  max-width: 520px;
}

.pricing-card {
  max-width: 420px;
  width: 100%;
  padding: 34px 32px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
  text-align: center;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.pricing-card:hover {
  box-shadow: 0 0 40px rgba(104, 160, 255, 0.12);
  border-color: var(--accent);
}
.price-label {
  margin: 0 0 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
}

.price-value {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  white-space: nowrap;
}

.price-value span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--muted);
}

@media (max-width: 720px) {
  .marketing-page {
    padding: 18px;
  }

  .marketing-header,
  .pricing-card {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* ---------- Site footer ---------- */

.site-footer {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--muted);
  line-height: 1.7;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
}

.footer-col {
  flex: 1 1 200px;
}

.footer-col strong {
  color: var(--text);
}

.footer-col a {
  color: var(--accent);
  text-decoration: none;
}

.footer-col a:hover {
  text-decoration: underline;
}