frontend/src/App.css

.app-shell {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px 20px 80px;
}

.hero {
  margin-bottom: 28px;
}

.eyebrow,
.panel-kicker,
.section-label,
.field-label,
.support-title {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--muted-strong);
}

.hero h1 {
  margin: 10px 0 14px;
  font-size: clamp(2.2rem, 4vw, 3.8rem);
  line-height: 1.04;
  letter-spacing: -0.04em;
  max-width: 12ch;
}

.hero-subtitle {
  max-width: 720px;
  margin: 0;
  font-size: 1.02rem;
  color: var(--muted);
}

.top-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(300px, 0.95fr);
  gap: 20px;
  margin-bottom: 20px;
}

.view-switch {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  width: min(420px, 100%);
  padding: 7px;
  margin: 0 0 28px;
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 18px 36px rgba(15, 23, 42, 0.08);
}

.panel {
  background: var(--panel-bg);
  border: 1px solid var(--panel-border);
  border-radius: 24px;
  box-shadow: var(--panel-shadow);
  padding: 24px;
  backdrop-filter: blur(12px);
}

.panel-header,
.answer-header,
.source-header,
.claim-card-header,
.claim-sources-header,
.health-summary,
.actions,
.token-row,
.health-grid,
.source-meta {
  display: flex;
  align-items: center;
}

.panel-header,
.answer-header,
.source-header,
.health-summary {
  justify-content: space-between;
  gap: 16px;
}

.panel-header h2,
.answer-header h3 {
  margin: 6px 0 0;
  font-size: 1.2rem;
}

.mode-switch {
  display: inline-grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 6px;
  margin: 24px 0;
  border-radius: 16px;
  background: var(--accent-soft);
}

.mode-button,
.view-button,
.primary-button,
.secondary-button,
.ghost-button {
  border: 0;
  border-radius: 14px;
  font: inherit;
  cursor: pointer;
  transition: background-color 160ms ease, color 160ms ease, transform 160ms ease, border-color 160ms ease;
}

.mode-button {
  padding: 12px 14px;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
}

.view-button {
  padding: 14px 20px;
  background: transparent;
  color: var(--muted-strong);
  font-weight: 700;
}

.mode-button.is-active,
.view-button.is-active {
  background: var(--panel-bg);
  color: var(--text-color);
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.08);
}

.field {
  display: grid;
  gap: 10px;
  margin-bottom: 20px;
}

.field-input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 16px;
  border: 1px solid var(--input-border);
  background: var(--input-bg);
  color: var(--text-color);
  font: inherit;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.field-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(27, 83, 157, 0.12);
  background: #ffffff;
}

.field-input-file {
  padding: 12px;
}

.field-textarea {
  min-height: 150px;
  resize: vertical;
}

.field-help,
.subtle-copy,
.version-copy,
.empty-sources,
.results-meta {
  color: var(--muted);
  font-size: 0.92rem;
}

.token-row {
  gap: 10px;
}

.token-row .field-input {
  flex: 1;
}

.actions {
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.primary-button,
.secondary-button,
.ghost-button {
  padding: 12px 16px;
  font-weight: 700;
}

.primary-button {
  background: linear-gradient(135deg, #154f8d, #13386b);
  color: #ffffff;
  box-shadow: 0 12px 28px rgba(19, 56, 107, 0.22);
}

.secondary-button {
  background: #eef4fb;
  color: var(--text-color);
}

.ghost-button {
  background: transparent;
  border: 1px solid var(--panel-border);
  color: var(--muted-strong);
}

.primary-button:hover,
.secondary-button:hover,
.ghost-button:hover,
.mode-button:hover,
.view-button:hover {
  transform: translateY(-1px);
}

.primary-button:disabled,
.secondary-button:disabled,
.ghost-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.status-panel {
  display: grid;
  gap: 16px;
  align-content: start;
}

.health-card,
.support-card,
.answer-card,
.source-card,
.loading-box,
.empty-state,
.notice {
  border-radius: 20px;
}

.health-card,
.support-card,
.answer-card,
.loading-box,
.empty-state,
.notice {
  border: 1px solid var(--panel-border);
  background: rgba(255, 255, 255, 0.78);
}

.health-card,
.support-card {
  padding: 18px;
}

.health-grid {
  align-items: stretch;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

.health-grid > div {
  min-width: 132px;
  flex: 1 1 132px;
  padding: 14px;
  border-radius: 16px;
  background: var(--accent-soft);
}

.health-grid dt {
  margin-bottom: 6px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.health-grid dd {
  margin: 0;
  font-weight: 700;
  color: var(--text-color);
  word-break: break-word;
}

.status-message {
  margin: 16px 0 0;
  color: var(--danger);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.status-healthy,
.status-ok {
  background: rgba(13, 148, 103, 0.12);
  color: #0f7a57;
}

.status-checking,
.status-no_context {
  background: rgba(217, 119, 6, 0.14);
  color: #a35404;
}

.status-unhealthy,
.status-error {
  background: rgba(220, 38, 38, 0.12);
  color: #b42318;
}

.status-supported {
  background: rgba(13, 148, 103, 0.12);
  color: #0f7a57;
}

.status-weakly_supported {
  background: rgba(217, 119, 6, 0.14);
  color: #a35404;
}

.status-unsupported {
  background: rgba(220, 38, 38, 0.12);
  color: #b42318;
}

.results-panel {
  display: grid;
  gap: 18px;
}

.history-panel,
.history-list {
  display: grid;
  gap: 16px;
}

.history-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.history-context {
  padding: 16px;
  border: 1px solid rgba(21, 79, 141, 0.12);
  border-radius: 18px;
  background: var(--accent-soft);
}

.history-context h3,
.history-context p {
  margin: 6px 0 0;
}

.history-row {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  width: 100%;
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text-color);
  text-align: left;
  cursor: pointer;
  font: inherit;
  transition: border-color 160ms ease, transform 160ms ease;
}

.history-row:hover {
  border-color: rgba(21, 79, 141, 0.32);
  transform: translateY(-1px);
}

.history-meta {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.92rem;
}

.history-counts {
  min-width: 110px;
  color: var(--muted-strong);
  font-size: 0.92rem;
  font-weight: 700;
  text-align: right;
}

.history-query {
  padding: 18px;
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
}

.history-query-header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.history-query h3,
.history-query p {
  margin: 6px 0 0;
}

.loading-box,
.empty-state,
.notice {
  padding: 18px 20px;
}

.loading-box,
.empty-state {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted-strong);
}

.notice-error {
  border-color: rgba(220, 38, 38, 0.24);
  background: rgba(254, 242, 242, 0.92);
  color: #8b1e18;
}

.spinner {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  border: 2px solid rgba(19, 56, 107, 0.16);
  border-top-color: #154f8d;
  animation: spin 0.8s linear infinite;
}

.answers-grid {
  display: grid;
  gap: 18px;
}

.answer-card {
  padding: 22px;
}

.answer-copy {
  margin-top: 18px;
}

.answer-copy p:last-child {
  margin: 8px 0 0;
  color: var(--text-color);
}

.claim-section,
.source-section {
  margin-top: 22px;
}

.claim-list,
.source-list {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.claim-card,
.source-card {
  padding: 16px;
  border: 1px solid rgba(21, 79, 141, 0.12);
  background: var(--accent-soft);
}

.claim-card {
  border-radius: 20px;
  background: rgba(237, 244, 253, 0.92);
}

.claim-card-header,
.claim-sources-header {
  justify-content: space-between;
  gap: 14px;
}

.claim-text,
.claim-rationale {
  margin: 0;
}

.claim-text {
  font-weight: 700;
  color: var(--text-color);
}

.claim-rationale {
  margin-top: 10px;
  color: var(--muted-strong);
}

.claim-sources {
  margin-top: 16px;
}

.source-meta {
  justify-content: flex-start;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--muted-strong);
}

.source-card p {
  margin: 0;
  color: var(--text-color);
}

.support-title {
  margin: 0 0 10px;
}

.support-copy,
.section-label {
  margin: 0;
}

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

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

@media (max-width: 980px) {
  .top-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .app-shell {
    padding: 36px 16px 60px;
  }

  .panel {
    padding: 20px;
  }

  .panel-header,
  .answer-header,
  .history-query-header,
  .source-header,
  .claim-card-header,
  .claim-sources-header,
  .health-summary,
  .token-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .token-row .ghost-button,
  .actions button {
    width: 100%;
  }

  .actions {
    display: grid;
  }

  .view-switch {
    width: 100%;
  }

  .history-row {
    flex-direction: column;
  }

  .history-counts {
    text-align: left;
  }
}