:root {
  --bg-top: #f4efe5;
  --bg-bottom: #dce8e6;
  --panel: rgba(255, 250, 244, 0.86);
  --panel-strong: rgba(255, 252, 248, 0.96);
  --ink: #1f2a2a;
  --muted: #546262;
  --accent: #0f766e;
  --accent-strong: #0b5c56;
  --accent-soft: #d7efe8;
  --border: rgba(31, 42, 42, 0.12);
  --shadow: 0 18px 50px rgba(19, 37, 35, 0.14);
  --radius-xl: 28px;
  --radius-lg: 18px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI Variable Text", "Aptos", "Trebuchet MS", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(15, 118, 110, 0.18), transparent 30%),
    radial-gradient(circle at top right, rgba(212, 113, 73, 0.16), transparent 28%),
    linear-gradient(180deg, var(--bg-top), var(--bg-bottom));
}

.shell {
  max-width: 1500px;
  margin: 0 auto;
  padding: 28px;
  transition: opacity 160ms ease, filter 160ms ease;
}

.shell.auth-locked {
  opacity: 0.22;
  filter: blur(4px) saturate(0.8);
  pointer-events: none;
  user-select: none;
}

.auth-gate {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: rgba(16, 28, 28, 0.34);
  backdrop-filter: blur(8px);
  z-index: 20;
}

.auth-gate.hidden {
  display: none;
}

.auth-panel {
  width: min(460px, 100%);
  background: linear-gradient(145deg, rgba(255, 252, 248, 0.98), rgba(237, 247, 243, 0.92));
  box-shadow: 0 24px 70px rgba(14, 26, 25, 0.22);
}

.view-tabs {
  display: inline-flex;
  gap: 8px;
  margin-top: 22px;
  padding: 8px;
  border-radius: 24px;
  background: rgba(255, 250, 244, 0.78);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.view-tab {
  border: 1px solid transparent;
  border-radius: 18px;
  padding: 12px 18px;
  background: rgba(255, 255, 255, 0.45);
  color: var(--ink);
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease, box-shadow 140ms ease;
}

.view-tab:hover {
  transform: translateY(-1px);
  border-color: rgba(15, 118, 110, 0.18);
  background: rgba(255, 255, 255, 0.7);
}

.view-tab.active {
  background: var(--panel-strong);
  color: var(--accent-strong);
  border-color: rgba(15, 118, 110, 0.18);
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.12);
}

.tab-panels {
  margin-top: 18px;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: stretch;
  padding: 26px 28px;
  border: 1px solid var(--border);
  border-radius: 32px;
  background: linear-gradient(135deg, rgba(255, 252, 248, 0.94), rgba(236, 247, 244, 0.82));
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 10px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--accent-strong);
  font-weight: 700;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
}

.subtitle {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.hero-card {
  min-width: 280px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 20px;
  border-radius: 22px;
  background: rgba(15, 118, 110, 0.08);
  border: 1px solid rgba(15, 118, 110, 0.1);
}

.hero-stat span {
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-strong);
}

.hero-stat label {
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.9rem;
}

.layout {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 22px;
  margin-top: 22px;
}

.panel {
  padding: 22px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--border);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.articles-panel,
.detail-panel {
  min-height: 420px;
}

.workspace-panel {
  min-height: 76vh;
}

.question-panel {
  grid-column: 1 / -1;
}

.question-panel-primary {
  grid-column: auto;
}

.panel-heading h2 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: -0.03em;
}

.panel-heading p {
  margin: 6px 0 0;
  color: var(--muted);
}

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

.workspace-form {
  max-width: 920px;
}

.source-switch {
  display: inline-flex;
  gap: 8px;
  margin-top: 18px;
  padding: 6px;
  background: rgba(15, 118, 110, 0.08);
  border-radius: 999px;
}

.source-tab {
  border: none;
  border-radius: 999px;
  padding: 10px 16px;
  background: transparent;
  color: var(--muted);
  font-weight: 600;
  cursor: pointer;
}

.source-tab.active {
  background: var(--panel-strong);
  color: var(--accent-strong);
  box-shadow: 0 8px 20px rgba(15, 118, 110, 0.14);
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.02em;
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid rgba(31, 42, 42, 0.12);
  background: var(--panel-strong);
  color: var(--ink);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
}

textarea {
  resize: vertical;
}

.primary-button,
.secondary-button {
  border: none;
  border-radius: 16px;
  padding: 14px 18px;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.primary-button {
  background: linear-gradient(135deg, var(--accent), #115e59);
  color: white;
}

.secondary-button {
  background: linear-gradient(135deg, #c96e3f, #aa5630);
  color: white;
}

.secondary-button.warning-disabled,
.secondary-button.warning-disabled:disabled {
  background: linear-gradient(135deg, #b43b3b, #8c2222);
  color: #fff4f4;
  opacity: 1;
  cursor: not-allowed;
  box-shadow: 0 10px 24px rgba(140, 34, 34, 0.22);
}

.form-message {
  min-height: 1.2em;
  margin: 0;
  color: var(--muted);
}

.article-list {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  max-height: 720px;
  overflow: auto;
  padding-right: 4px;
}

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

.date-range-field {
  position: relative;
}

.date-range-trigger {
  width: 100%;
  min-height: 52px;
  border: 1px solid rgba(31, 42, 42, 0.12);
  background: var(--panel-strong);
  color: var(--ink);
  border-radius: 16px;
  padding: 14px 16px;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.date-range-trigger::after {
  content: "▾";
  float: right;
  color: var(--muted);
  font-weight: 700;
  font-size: 0.95rem;
}

.date-range-reset {
  margin-top: 8px;
  border: none;
  background: transparent;
  color: var(--accent-strong);
  font: inherit;
  font-size: 0.84rem;
  font-weight: 700;
  padding: 0;
  cursor: pointer;
  text-align: left;
}

.date-range-popover {
  position: absolute;
  top: calc(100% + 10px);
  left: 0;
  z-index: 10;
  min-width: 320px;
  padding: 14px;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  box-shadow: 0 16px 34px rgba(19, 37, 35, 0.14);
  display: grid;
  gap: 12px;
}

.date-range-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.library-pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.article-card {
  border: 1px solid var(--border);
  background: var(--panel-strong);
  border-radius: 20px;
  padding: 16px;
  cursor: default;
  transition: transform 140ms ease, border-color 140ms ease, box-shadow 140ms ease;
}

.article-card:hover,
.article-card.active {
  transform: translateY(-2px);
  border-color: rgba(15, 118, 110, 0.4);
  box-shadow: 0 12px 30px rgba(15, 118, 110, 0.14);
}

.article-card.scope-selected {
  border-color: rgba(15, 118, 110, 0.22);
  background: linear-gradient(135deg, rgba(255, 252, 248, 0.98), rgba(238, 247, 244, 0.98));
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.08);
}

.article-card:not(.scope-selected) .scope-indicator {
  opacity: 0.6;
}

.article-card-actions {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}

.mini-button {
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 9px 13px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--ink);
  font: inherit;
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
}

.mini-button:hover {
  background: rgba(255, 255, 255, 0.95);
}

.mini-button.danger {
  color: #8c2f2f;
  border-color: rgba(178, 47, 47, 0.22);
  background: rgba(178, 47, 47, 0.08);
}

.article-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.82rem;
  flex-wrap: wrap;
}

.article-meta-secondary {
  margin-top: 10px;
  margin-bottom: 0;
  font-size: 0.78rem;
}

.scope-indicator {
  font-weight: 700;
  color: var(--accent-strong);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  font-weight: 700;
  text-transform: capitalize;
  background: rgba(15, 118, 110, 0.12);
  color: var(--accent-strong);
}

.status-pill.failed {
  background: rgba(178, 47, 47, 0.12);
  color: #8c2f2f;
}

.status-pill.processing,
.status-pill.queued {
  background: rgba(201, 110, 63, 0.14);
  color: #934621;
}

.article-card h3,
.detail-content h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.article-card p,
.detail-content p {
  margin: 0;
  color: var(--muted);
}

.detail-content.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 340px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.42);
  border-radius: 22px;
  margin-top: 18px;
}

#detail-panel .detail-panel {
  min-height: 70vh;
}

.detail-grid {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}

.detail-block {
  padding: 18px;
  border-radius: 20px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
}

.tag-row,
.chunk-list,
.citation-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
}

.tag,
.citation-chip {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.86rem;
  font-weight: 600;
}

.interactive-tag {
  border: none;
  cursor: pointer;
  font: inherit;
}

.interactive-tag:hover {
  background: rgba(15, 118, 110, 0.18);
}

.citation-chip {
  border: none;
  cursor: pointer;
  font: inherit;
}

.citation-chip:hover {
  background: rgba(15, 118, 110, 0.16);
}

.inline-citation {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin: 0 2px;
  padding: 1px 8px;
  border: 1px solid rgba(15, 118, 110, 0.16);
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--accent-strong);
  font: inherit;
  font-size: 0.92em;
  font-weight: 700;
  cursor: pointer;
  vertical-align: baseline;
}

.inline-citation:hover {
  background: rgba(15, 118, 110, 0.16);
}

.citation-focus-block {
  border-color: rgba(15, 118, 110, 0.24);
  box-shadow: inset 0 0 0 1px rgba(15, 118, 110, 0.08);
}

.chunk-item {
  padding: 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.58);
}

.chunk-item strong {
  display: block;
  margin-bottom: 8px;
}

.answer-card {
  margin-top: 18px;
  padding: 18px;
  border-radius: 22px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
}

.prompt-editor {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid rgba(31, 42, 42, 0.1);
}

.config-grid {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.prompt-editor-header {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 12px;
}

.prompt-editor-header h3 {
  margin: 0 0 4px;
}

.prompt-editor-header p {
  margin: 0;
  color: var(--muted);
}

.config-copy {
  margin: 8px 0 0;
  color: var(--muted);
}

.config-section {
  margin-top: 18px;
}

.prompt-tuning-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
  align-items: end;
}

.scope-summary {
  margin: 0;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--accent-strong);
  font-weight: 700;
}

.scope-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.scope-actions {
  display: inline-flex;
  gap: 10px;
  margin-left: auto;
}

.question-progress {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: 18px;
  background: rgba(201, 110, 63, 0.12);
  color: #934621;
  font-weight: 700;
}

.instapaper-controls,
.instapaper-settings {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-top: 18px;
}

.instapaper-progress {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.1);
  color: var(--accent-strong);
  font-weight: 700;
}

.instapaper-job {
  margin-top: 16px;
  padding: 16px 18px;
  border-radius: 22px;
  border: 1px solid rgba(15, 118, 110, 0.14);
  background: linear-gradient(135deg, rgba(255, 252, 248, 0.96), rgba(231, 244, 241, 0.94));
  box-shadow: 0 14px 30px rgba(15, 118, 110, 0.08);
}

.instapaper-job.running,
.instapaper-job.queued {
  border-color: rgba(201, 110, 63, 0.24);
  background: linear-gradient(135deg, rgba(255, 252, 248, 0.98), rgba(252, 240, 230, 0.96));
}

.instapaper-job.completed {
  border-color: rgba(15, 118, 110, 0.28);
  background: linear-gradient(135deg, rgba(244, 252, 249, 0.98), rgba(225, 244, 238, 0.98));
  box-shadow: 0 16px 34px rgba(15, 118, 110, 0.12);
}

.instapaper-job.failed {
  border-color: rgba(178, 47, 47, 0.24);
  background: linear-gradient(135deg, rgba(255, 248, 247, 0.98), rgba(253, 235, 232, 0.98));
  box-shadow: 0 16px 34px rgba(178, 47, 47, 0.1);
}

.instapaper-job-header,
.instapaper-job-stats {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.instapaper-job-header {
  margin-bottom: 12px;
}

.instapaper-job-bar {
  width: 100%;
  height: 12px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.12);
  border: 1px solid rgba(15, 118, 110, 0.08);
}

.instapaper-job-bar-fill {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, #0f766e, #d47149);
  transition: width 220ms ease;
}

.instapaper-job-stats {
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.instapaper-job-active {
  min-height: 1.2em;
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.instapaper-result {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 18px;
  border: 1px solid rgba(15, 118, 110, 0.16);
  background: rgba(225, 244, 238, 0.92);
  color: var(--accent-strong);
  font-weight: 700;
}

.instapaper-result.failed {
  border-color: rgba(178, 47, 47, 0.22);
  background: rgba(253, 235, 232, 0.96);
  color: #8c2f2f;
}

.spinner {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 2px solid rgba(15, 118, 110, 0.18);
  border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}

.checkbox-row {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  padding: 10px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid var(--border);
}

.checkbox-row input {
  width: auto;
  margin: 0;
}

.instapaper-setting-status {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.inline-field {
  min-width: 220px;
  margin: 0;
}

.compact-field {
  min-width: 140px;
}

.compact-field input {
  padding-block: 12px;
}

.instapaper-toolbar {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.instapaper-browser-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
}

.instapaper-counts {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 600;
}

.instapaper-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
  max-height: 420px;
  overflow: auto;
}

.instapaper-list-full {
  max-height: none;
  min-height: 50vh;
}

.instapaper-item {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: start;
  padding: 14px;
  border-radius: 18px;
  background: var(--panel-strong);
  border: 1px solid var(--border);
}

.instapaper-item.disabled {
  opacity: 0.58;
}

.instapaper-item input[type="checkbox"]:disabled {
  cursor: not-allowed;
  filter: grayscale(1);
}

.instapaper-item h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.instapaper-item-main {
  display: grid;
  gap: 10px;
}

.instapaper-meta-row,
.instapaper-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.instapaper-row-actions {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.instapaper-failure-reason {
  margin: 2px 0 0;
  color: #8c2f2f;
  font-size: 0.88rem;
  line-height: 1.4;
}

.instapaper-meta-chip,
.instapaper-tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 600;
}

.instapaper-tag-chip {
  background: rgba(201, 110, 63, 0.12);
}

.answer-card h3 {
  margin-top: 0;
}

#answer-text p {
  margin: 0 0 12px;
}

#answer-text p:last-child {
  margin-bottom: 0;
}

#answer-text ul {
  margin: 0 0 14px 1.2rem;
  padding: 0;
}

#answer-text li {
  margin-bottom: 8px;
  color: var(--ink);
}

#answer-text strong {
  color: var(--ink);
}

#citation-list {
  display: none;
}

.explore-summary {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(15, 118, 110, 0.08);
  color: var(--accent-strong);
  font-weight: 700;
}

.explore-count {
  margin-top: 16px;
  color: var(--accent-strong);
  font-size: 0.92rem;
  font-weight: 700;
}

.explore-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 18px;
}

.explore-builder {
  display: grid;
  gap: 14px;
  margin-top: 18px;
}

.explore-query-bar {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  justify-content: space-between;
}

.explore-filter-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  min-height: 42px;
  flex: 1;
}

.explore-add-form {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: end;
}

.explore-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: none;
  cursor: pointer;
  font: inherit;
}

.explore-filter-remove {
  color: var(--muted);
  font-size: 1rem;
  line-height: 1;
}

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

.explore-card {
  padding: 18px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: var(--panel-strong);
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.08);
}

.explore-card h3 {
  margin: 0 0 10px;
}

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

.hidden {
  display: none !important;
}

.is-busy {
  opacity: 0.65;
  pointer-events: none;
}

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

@media (max-width: 1100px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .question-panel {
    grid-column: auto;
  }

  .hero {
    flex-direction: column;
  }

  .hero-card {
    min-width: 0;
  }
}

@media (max-width: 700px) {
  .shell {
    padding: 16px;
  }

  .explore-query-bar,
  .explore-add-form,
  .explore-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .panel,
  .hero {
    padding: 18px;
  }

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