@import url("https://fonts.googleapis.com/css2?family=Literata:opsz,wght@7..72,400;7..72,500;7..72,600&family=Newsreader:opsz,wght@6..72,500;6..72,600;6..72,700&display=swap");

:root {
  --color-brand: #24333d;
  --color-read: #789481;
  --color-read-hover: #607a68;
  --color-read-soft: #eaf0ec;
  --color-background: #f6f8f9;
  --color-surface: #ffffff;
  --color-surface-subtle: #f1f4f5;
  --color-reading-canvas: #fffcf7;
  --color-text-strong: #24333d;
  --color-text: #45545f;
  --color-text-muted: #687581;
  --color-border: #dce2e6;
  --color-border-strong: #cbd4d9;
  --color-focus: #789481;
  --color-success: #16715b;
  --color-warning: #b9682b;
  --color-error: #b64032;
  --font-ui: "Inter", "Noto Sans SC", "Segoe UI", sans-serif;
  --font-display: "Newsreader", "Noto Serif SC", Georgia, serif;
  --font-serif: "Literata", "Noto Serif SC", Georgia, serif;
  --font-content: "Literata", "Noto Serif SC", Georgia, serif;
  --font-micro: "DM Mono", "SFMono-Regular", Consolas, monospace;
  --paper: var(--color-background);
  --paper-raised: var(--color-surface);
  --ink: var(--color-text-strong);
  --ink-soft: var(--color-text);
  --muted: var(--color-text-muted);
  --hairline: var(--color-border);
  --hairline-strong: var(--color-border-strong);
  --accent: var(--color-read);
  --green: var(--color-success);
  --sand: var(--color-read-soft);
  --caps: 0.06em;
}

::selection {
  background: var(--color-read-soft);
}

body {
  background: var(--color-background);
  color: var(--color-text);
}

button,
input,
textarea,
select {
  font-family: var(--font-ui);
}

button {
  transition:
    color 150ms ease-in-out,
    background-color 150ms ease-in-out,
    border-color 150ms ease-in-out,
    transform 180ms ease-out;
}

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

button:active {
  transform: translateY(0);
}

.site-header,
.reader-header {
  min-height: 68px;
  border-bottom-color: var(--color-border);
  background: rgb(255 255 255 / 96%);
  backdrop-filter: blur(12px);
}

.brand-mark {
  border: 0;
  background: transparent;
}

.brand-mark img {
  width: auto;
  height: 38px;
  object-fit: contain;
}

.top-nav button {
  color: var(--color-text);
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.06em;
}

.top-nav button:hover,
.top-nav button.active {
  color: var(--color-text-strong);
}

.top-nav button.active::after {
  height: 2px;
  background: var(--color-read);
}

.account-button {
  min-height: 40px;
  padding: 0 0.2rem;
  border-color: var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-strong);
}

.account-button:hover {
  border-color: var(--color-read);
  color: var(--color-read-hover);
}

.avatar-button {
  min-width: 36px;
  height: 36px;
  background: var(--color-brand);
  color: var(--color-surface);
}

.cloud-status {
  color: var(--color-read-hover);
}

.screen {
  color: var(--color-text);
}

.screen > .eyebrow,
.section-kicker {
  color: var(--color-text-muted);
  font-family: var(--font-micro);
  font-weight: 600;
}

.section-title-row {
  border-bottom-color: var(--color-border-strong);
}

.section-title-row h2,
.review-goal-head h2 {
  color: var(--color-text-strong);
  font-family: var(--font-ui);
  font-weight: 650;
}

.section-title-row button,
.brief-item button,
.discover-card footer button,
.table-action,
.today-alternate button,
.today-explore-link button {
  color: var(--color-read-hover);
}

.section-title-row button:hover,
.brief-item button:hover,
.discover-card footer button:hover,
.table-action:hover,
.today-alternate button:hover,
.today-explore-link button:hover {
  color: var(--color-text-strong);
}

.topic-ai {
  --topic: #496f8f;
  --topic-bg: #e8f0f5;
}

.topic-world,
.topic-default {
  --topic: #607a68;
  --topic-bg: #eaf0ec;
}

.topic-humanities {
  --topic: #687581;
  --topic-bg: #f1f4f5;
}

.topic-economy {
  --topic: #45545f;
  --topic-bg: #f1f4f5;
}

.topic-science {
  --topic: #16715b;
  --topic-bg: #eaf0ec;
}

.filters-row {
  align-items: flex-end;
  padding-bottom: 1rem;
  border-bottom-color: var(--color-border);
}

.topic-filters,
.level-row,
.source-tabs {
  gap: 0.5rem;
}

.source-tabs {
  flex-wrap: wrap;
  overflow: visible;
}

.source-tabs.source-tabs-collapsed > button:nth-child(n + 6):not(.source-tabs-toggle) {
  display: none;
}

.source-tabs .source-tabs-toggle {
  border-style: dashed;
  color: var(--color-read-hover);
}

.topic-filters button,
.level-row button,
.source-tabs button {
  min-height: 36px;
  padding: 0.45rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-text-muted);
  font-size: 0.72rem;
}

.topic-filters button:hover,
.level-row button:hover,
.source-tabs button:hover {
  border-color: var(--color-border-strong);
  color: var(--color-text-strong);
}

.topic-filters button.active,
.level-row button.active,
.source-tabs button.active {
  border-color: var(--color-read);
  background: var(--color-read-soft);
  color: var(--color-read-hover);
}

.level-row {
  margin-top: -0.8rem;
}

.level-row > span {
  margin-right: 0.25rem;
  color: var(--color-text-muted);
  font-family: var(--font-micro);
}

.import-inline {
  width: min(390px, 100%);
  min-height: 40px;
  padding: 0 0 0 0.75rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 7px;
  background: var(--color-surface);
}

.import-inline:focus-within {
  border-color: var(--color-read);
  box-shadow: 0 0 0 3px rgb(120 148 129 / 16%);
}

.import-inline button {
  align-self: stretch;
  min-width: 54px;
  padding-inline: 0.75rem;
  border-left: 1px solid var(--color-border);
  color: var(--color-read-hover);
}

.brief-column h3 {
  border-bottom-color: var(--topic, var(--color-read));
}

.brief-item,
.discover-card,
.knowledge-card {
  padding: 1.25rem;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
}

.brief-item,
.discover-card {
  min-height: 228px;
  align-content: start;
  transition:
    border-color 150ms ease-in-out,
    transform 180ms ease-out;
}

.brief-item:hover,
.discover-card:hover {
  border-color: var(--color-border-strong);
  transform: translateY(-1px);
}

.brief-row,
.source-row,
.knowledge-grid {
  align-items: stretch;
}

.brief-row {
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  gap: 1.25rem;
}

.brief-row .brief-item:first-child {
  min-height: 260px;
  border-color: color-mix(in srgb, var(--topic, var(--color-read)) 38%, var(--color-border));
  background: linear-gradient(145deg, var(--color-surface) 0%, var(--color-read-soft) 160%);
}

.brief-row .brief-item:first-child h4 {
  max-width: 18ch;
  min-height: 0;
  font-size: clamp(1.55rem, 2.2vw, 2rem);
  -webkit-line-clamp: 3;
}

.brief-row .brief-item:nth-child(n + 3),
.source-row .discover-card:nth-child(n + 5),
.journal-list .journal-item:nth-child(n + 4),
.cluster-column .cluster-entry:nth-child(n + 4),
.knowledge-grid .knowledge-card:nth-child(n + 7) {
  display: none;
}

.brief-item h4,
.discover-card h3,
.knowledge-card h3 {
  color: var(--color-text-strong);
}

.brief-item h4,
.discover-card h3,
.editorial-pick h2,
.latest-card h3,
.today-alternate h3 {
  display: -webkit-box;
  overflow: hidden;
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.18;
  cursor: pointer;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.brief-item h4:focus-visible,
.discover-card h3:focus-visible,
.editorial-pick h2:focus-visible,
.latest-card h3:focus-visible,
.today-alternate h3:focus-visible {
  border-radius: 3px;
  outline: 2px solid var(--color-focus);
  outline-offset: 4px;
}

.brief-item h4 {
  min-height: 2.36em;
  font-size: clamp(1.3rem, 1.7vw, 1.62rem);
}

.discover-card h3 {
  min-height: 2.36em;
  font-size: 1.28rem;
}

.brief-item h4:hover,
.discover-card h3:hover,
.editorial-pick h2:hover,
.latest-card h3:hover,
.today-alternate h3:hover {
  color: var(--color-read-hover);
}

.brief-item p,
.discover-card p,
.knowledge-card p {
  color: var(--color-text);
}

.brief-item > p,
.discover-card > p {
  display: -webkit-box;
  overflow: hidden;
  margin: 0;
  color: var(--color-text-muted);
  font-family: var(--font-ui);
  font-size: 0.9rem;
  line-height: 1.55;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.source-card > p {
  -webkit-line-clamp: 1;
}

.brief-item footer,
.discover-card footer {
  align-self: end;
  margin-top: auto;
}

.brief-item footer button,
.discover-card footer button {
  min-height: 36px;
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.source-row {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
}

.brief-source,
.mini-chip,
.level-tag {
  font-family: var(--font-micro);
}

.document-import-section {
  padding: 2rem;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
}

.document-import-section h2 {
  color: var(--color-text-strong);
  font-family: var(--font-ui);
  font-weight: 650;
}

.document-import-controls input[type="text"] {
  height: 40px;
  padding: 0 0.75rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 7px;
  background: var(--color-surface);
}

.document-import-controls input[type="text"]:focus {
  border-color: var(--color-read);
  box-shadow: 0 0 0 3px rgb(120 148 129 / 16%);
}

.document-import-controls label {
  height: 40px;
  border-color: var(--color-brand);
  border-radius: 6px;
  background: var(--color-brand);
  color: var(--color-surface);
}

.today-masthead .eyebrow {
  color: var(--color-read-hover);
  font-family: var(--font-micro);
}

.today-masthead h1 {
  color: var(--color-text-strong);
  font-family: var(--font-display);
}

.today-stats {
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
}

.today-stat,
.today-stat + .today-stat,
.today-stat:nth-child(n + 3) {
  border-color: var(--color-border);
}

.today-stat strong {
  color: var(--color-text-strong);
}

.featured-card {
  border-radius: 9px;
}

.featured-card.no-cover,
.discovery-hero {
  background: var(--color-brand);
}

.today-alternate {
  min-height: 170px;
  padding: 1.4rem;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
}

.today-alternate h3 {
  color: var(--color-text-strong);
}

.today-review-cta,
.today-done {
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
}

.today-review-cta button {
  border-radius: 6px;
  background: var(--color-brand);
  color: var(--color-surface);
}

.today-review-cta button:hover {
  background: var(--color-read-hover);
}

.notebook-tabs {
  border-bottom-color: var(--color-border-strong);
}

.notebook-tabs button {
  min-height: 40px;
  color: var(--color-text-muted);
}

.notebook-tabs button.active {
  border-bottom-color: var(--color-read);
  color: var(--color-text-strong);
}

.empty-library {
  margin-top: 1.5rem;
  padding: clamp(3rem, 6vw, 5rem) 1.5rem;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
}

.empty-library h1 {
  color: var(--color-text-strong);
  font-family: var(--font-ui);
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 650;
  line-height: 1.2;
}

.empty-library p {
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.7;
}

.empty-library button,
.reader-finish > button,
.today-continue button {
  min-height: 40px;
  border-color: var(--color-brand);
  border-radius: 6px;
  background: var(--color-brand);
  color: var(--color-surface);
}

.empty-library button:hover,
.reader-finish > button:hover,
.today-continue button:hover {
  border-color: var(--color-read-hover);
  background: var(--color-read-hover);
  color: var(--color-surface);
}

.table-head {
  min-height: 44px;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-subtle);
}

.table-row {
  min-height: 52px;
  padding-inline: 1rem;
  border-color: var(--color-border);
  background: var(--color-surface);
}

.table-row strong {
  color: var(--color-text-strong);
}

.goal-picker button {
  min-width: 40px;
  min-height: 36px;
  border-color: var(--color-border-strong);
  border-radius: 6px;
  background: var(--color-surface);
}

.goal-picker button.active {
  border-color: var(--color-brand);
  background: var(--color-brand);
  color: var(--color-surface);
}

.review-meter {
  height: 6px;
  border-radius: 999px;
  background: var(--color-border);
}

.review-meter span {
  background: var(--color-read);
}

.review-card {
  border-color: var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
}

.review-actions {
  overflow: hidden;
  gap: 0;
  border-color: var(--color-border-strong);
  border-radius: 6px;
  background: var(--color-border);
}

.review-actions button {
  min-height: 52px;
  background: var(--color-surface);
  color: var(--color-text-strong);
}

.review-actions button:nth-child(1):hover {
  background: var(--color-error);
  color: var(--color-surface);
}

.review-actions button:nth-child(2):hover {
  background: var(--color-surface-subtle);
}

.review-actions button:nth-child(3):hover {
  background: var(--color-success);
  color: var(--color-surface);
}

.cluster-column h3,
.journal-item,
.highlight-item {
  border-color: var(--color-border);
}

.cluster-entry button {
  min-height: 52px;
  border-color: var(--color-border);
}

.cluster-entry strong,
.journal-takeaway {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.cluster-entry em,
.knowledge-card p {
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.knowledge-card button:nth-of-type(n + 3) {
  display: none;
}

.takeaway-overlay {
  background: rgb(36 51 61 / 38%);
}

.takeaway-panel,
.word-popover {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
  box-shadow: 0 20px 50px rgb(36 51 61 / 18%);
}

.takeaway-panel textarea {
  min-height: 120px;
  padding: 0.75rem;
  border: 1px solid var(--color-border-strong);
  border-radius: 7px;
  background: var(--color-surface);
}

.takeaway-panel textarea:focus {
  border-color: var(--color-read);
  box-shadow: 0 0 0 3px rgb(120 148 129 / 16%);
}

.takeaway-actions .takeaway-save {
  border-radius: 6px;
  background: var(--color-brand);
  color: var(--color-surface);
}

.reader-shell {
  background: var(--color-reading-canvas);
  --reader-font-size: 1.22rem;
  --reader-line-height: 1.78;
}

.reader-shell[data-text-size="small"] {
  --reader-font-size: 1.08rem;
}

.reader-shell[data-text-size="large"] {
  --reader-font-size: 1.38rem;
}

.reader-shell[data-text-spacing="compact"] {
  --reader-line-height: 1.58;
}

.reader-header .back-link,
.reader-actions button {
  color: var(--color-text-strong);
}

.reading-article h1 {
  color: var(--color-text-strong);
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 4.2vw, 3.8rem);
  font-weight: 600;
  line-height: 1.06;
}

.subtitle {
  max-width: 640px;
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: 1.08rem;
  font-style: normal;
  line-height: 1.65;
}

.article-body p {
  width: min(700px, 100%);
  color: #24333d;
  font-family: var(--font-content);
  font-size: var(--reader-font-size);
  line-height: var(--reader-line-height);
}

.reader-actions {
  position: relative;
}

.reader-settings-panel {
  position: absolute;
  z-index: 30;
  top: calc(100% + 0.65rem);
  right: 0;
  width: min(320px, calc(100vw - 2rem));
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 9px;
  background: var(--color-surface);
  box-shadow: 0 18px 45px rgb(36 51 61 / 14%);
}

.reader-settings-panel[hidden] {
  display: none;
}

.reader-setting-group {
  display: flex;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  border: 0;
}

.reader-setting-group + .reader-setting-group {
  margin-top: 1rem;
}

.reader-setting-group legend {
  width: 100%;
  margin-bottom: 0.5rem;
  color: var(--color-text-muted);
  font: 600 0.7rem/1 var(--font-ui);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.reader-setting-group button {
  min-height: 36px;
  padding: 0.45rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.78rem;
}

.reader-setting-group button[aria-pressed="true"] {
  border-color: var(--color-read);
  background: var(--color-read-soft);
  color: var(--color-text-strong);
}

.word-token {
  cursor: pointer;
}

.lookup-selection-button {
  min-height: 36px;
  color: var(--color-read-hover);
}

.mobile-nav-toggle {
  display: none;
}

.article-rule,
.reader-finish {
  border-color: var(--color-border);
}

.word-token:hover,
.word-token.highlighted {
  background: var(--color-read-soft);
  box-shadow: 0 0 0 0.1rem var(--color-read-soft);
}

.word-popover::before {
  border-color: var(--color-border);
  background: var(--color-surface);
}

.word-popover footer {
  border-color: var(--color-border);
}

.word-popover footer button {
  min-height: 48px;
  border-color: var(--color-border);
}

.reader-progress > span,
.progress-track > span {
  background: var(--color-read);
}

.site-footer {
  background: var(--color-brand);
  color: rgb(255 255 255 / 78%);
}

.footer-inner {
  border-bottom-color: rgb(255 255 255 / 18%);
}

.footer-wordmark {
  color: var(--color-surface);
}

.footer-tagline,
.footer-nav button,
.footer-fineprint {
  color: rgb(255 255 255 / 72%);
}

.footer-nav button:hover {
  color: var(--color-surface);
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid rgb(120 148 129 / 58%);
  outline-offset: 3px;
}

@media (max-width: 920px) {
  .site-header,
  .reader-header {
    min-height: 64px;
  }

  .brand-mark img {
    height: 34px;
  }

  .site-header {
    position: relative;
  }

  .mobile-nav-toggle {
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 6px;
    background: var(--color-surface);
    color: var(--color-text-strong);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .top-nav {
    position: absolute;
    z-index: 40;
    top: calc(100% + 1px);
    right: 1rem;
    left: 1rem;
    display: none;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.35rem;
    padding: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 0 0 10px 10px;
    background: var(--color-surface);
    box-shadow: 0 18px 45px rgb(36 51 61 / 14%);
  }

  .mobile-nav-open .top-nav {
    display: grid;
  }

  .top-nav button {
    width: 100%;
    min-height: 44px;
    padding: 0.6rem;
    border-radius: 5px;
    text-align: left;
  }

  .top-nav button.active {
    background: var(--color-read-soft);
  }

  .brief-item,
  .discover-card,
  .knowledge-card {
    padding: 1.1rem;
  }

  .brief-row,
  .source-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .filters-row {
    gap: 1rem;
  }

  .topic-filters {
    padding-bottom: 0.2rem;
  }

  .import-inline {
    width: 100%;
  }

  .today-alternate {
    min-height: 0;
  }

  .document-import-section {
    padding: 1.25rem;
  }

  .brief-row,
  .source-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .brief-item,
  .discover-card {
    min-height: 0;
  }
}

@media (max-width: 640px) {
  .brand-mark img {
    height: 32px;
  }

  .reading-article h1 {
    margin-bottom: 1.1rem;
    font-size: clamp(1.9rem, 8vw, 2.3rem);
    line-height: 1.08;
  }

  .subtitle {
    margin-bottom: 1.25rem;
  }

  .article-actions {
    margin-top: 1.5rem;
  }

  .article-rule {
    margin-block: 2rem;
  }

  .article-body p {
    font-size: min(var(--reader-font-size), 1.16rem);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }
}