:root {
  --bg: #f4fbff;
  --text: #163040;
  --muted: #5e7484;
  --border: #d8e8f1;
  --border-2: #bdd8e6;
  --shadow: 0 1px 8px rgba(14, 76, 120, 0.18);
  --shadow-soft: 0 1px 4px rgba(14, 76, 120, 0.1);
  --link: #0c5fd7;
  --visited: #5a41a4;
  --danger: #c33a32;
  --ok: #18755a;
  --max: 920px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", monospace;
  --sans: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell,
    Noto Sans, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #081722;
    --text: #e6f8ff;
    --muted: #8ca9ba;
    --border: #173546;
    --border-2: #23536b;
    --shadow: 0 1px 8px rgba(0, 0, 0, 0.42);
    --shadow-soft: 0 1px 4px rgba(0, 0, 0, 0.26);
    --link: #69b7ff;
    --visited: #b59cff;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(30, 214, 211, 0.12), transparent 24%),
    radial-gradient(circle at top right, rgba(12, 95, 215, 0.1), transparent 26%),
    var(--bg);
}

.shell {
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(244, 251, 255, 0.92);
  border-bottom: 1px solid var(--border);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  backdrop-filter: blur(10px);
  opacity: 0;
  transform: translateY(-18px);
  pointer-events: none;
  transition:
    opacity 0.36s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.48s cubic-bezier(0.22, 1, 0.36, 1);
}

@media (prefers-color-scheme: dark) {
  .topbar {
    background: rgba(8, 23, 34, 0.92);
  }
}

.topbarBrand {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
}

.topbarLogo {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  box-shadow: var(--shadow-soft);
}

.topbarTitle {
  font-weight: 700;
  letter-spacing: -0.02em;
}

.topbarSearch {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  max-width: 760px;
  min-width: 0;
}

body.is-results-mode .topbar {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.main {
  flex: 1;
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.home {
  min-height: calc(100vh - 112px);
  display: grid;
  place-items: center;
  padding: 24px 0 8px;
}

.hero {
  width: min(640px, 100%);
  padding: 8px 0 24px;
}

.hero,
.homeSearch,
.heroLogoWrap,
.heroWordmark,
.brandNote,
.actions,
.topics,
.metaRow,
.results {
  transition:
    transform 0.56s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.38s ease,
    filter 0.38s ease;
  will-change: transform, opacity;
}

.heroLogoWrap {
  display: flex;
  justify-content: center;
  margin-bottom: 16px;
}

.heroLogo {
  width: 112px;
  height: 112px;
  border-radius: 28px;
  box-shadow: 0 18px 34px rgba(14, 76, 120, 0.16);
}

.heroWordmark {
  font-weight: 800;
  letter-spacing: -1.4px;
  user-select: none;
  line-height: 1;
  white-space: nowrap;
  font-size: 76px;
  text-align: center;
  margin: 0 0 18px;
  color: #1187cb;
}

.brandNote {
  margin: 0 auto 24px;
  max-width: 520px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
}

.searchBox {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.86);
  box-shadow: var(--shadow-soft);
  min-width: 0;
}

@media (prefers-color-scheme: dark) {
  .searchBox {
    background: rgba(17, 35, 49, 0.92);
  }
}

.searchBox:focus-within {
  box-shadow: 0 0 0 4px rgba(30, 214, 211, 0.12), var(--shadow);
  border-color: var(--border-2);
}

.searchIcon {
  color: #0fa2cb;
  font-size: 18px;
  padding-left: 2px;
}

.queryInput {
  width: 100%;
  min-width: 0;
  border: 0;
  background: transparent;
  color: var(--text);
  outline: none;
  font-size: 16px;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
}

.topics {
  margin-top: 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.topicsLabel {
  font-size: 13px;
  color: var(--muted);
}

.topicChips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.newsletterCard {
  margin-top: 34px;
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 24px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.92), rgba(232, 248, 255, 0.82));
  box-shadow: 0 20px 40px rgba(14, 76, 120, 0.12);
}

@media (prefers-color-scheme: dark) {
  .newsletterCard {
    background:
      linear-gradient(145deg, rgba(16, 32, 44, 0.96), rgba(11, 24, 35, 0.92));
  }
}

.newsletterEyebrow {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: #0fa2cb;
}

.newsletterTitle {
  margin: 8px 0 8px;
  font-size: 28px;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.newsletterIntro,
.newsletterFineprint {
  margin: 0;
  color: var(--muted);
}

.newsletterIntro {
  font-size: 14px;
}

.newsletterForm {
  display: grid;
  grid-template-columns: 1fr 1.2fr auto;
  gap: 10px;
  margin-top: 16px;
}

.newsletterInput {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 14px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--text);
  outline: none;
  font-size: 15px;
}

@media (prefers-color-scheme: dark) {
  .newsletterInput {
    background: rgba(17, 35, 49, 0.92);
  }
}

.newsletterInput:focus {
  border-color: var(--border-2);
  box-shadow: 0 0 0 4px rgba(30, 214, 211, 0.12);
}

.newsletterStatus {
  min-height: 20px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--muted);
}

.newsletterStatus.is-ok {
  color: var(--ok);
}

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

.newsletterFineprint {
  margin-top: 8px;
  font-size: 12px;
}

.topicChip {
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.82);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: var(--shadow-soft);
}

@media (prefers-color-scheme: dark) {
  .topicChip {
    background: rgba(17, 35, 49, 0.92);
  }
}

.topicChip:hover {
  border-color: var(--border-2);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

.topicChip:active {
  transform: translateY(0);
}

.actionBtn {
  padding: 10px 14px;
  border-radius: 4px;
  border: 1px solid transparent;
  background: #eef8fc;
  color: var(--text);
  font-weight: 500;
  cursor: pointer;
}

@media (prefers-color-scheme: dark) {
  .actionBtn {
    background: #143245;
    color: var(--text);
  }
}

.actionBtn:hover {
  border-color: var(--border);
  box-shadow: var(--shadow-soft);
}

.actionBtn.secondary {
  background: transparent;
  border-color: transparent;
}

.actionBtn.secondary:hover {
  border-color: var(--border);
}

.iconBtn {
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  cursor: pointer;
}

.iconBtn:hover {
  background: rgba(16, 135, 203, 0.1);
}

.iconBtn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.settingsBtnFixed {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1000;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.9);
  color: var(--muted);
  font-size: 22px;
  line-height: 1;
  width: 44px;
  height: 44px;
  border-radius: 999px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
}

.settingsBtnFixed:hover {
  background: rgba(16, 135, 203, 0.1);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.metaRow {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding: 0 8px;
}

.hint {
  font-size: 13px;
  color: var(--muted);
}

.status {
  font-size: 13px;
  color: var(--muted);
  font-family: var(--mono);
  text-align: right;
  min-height: 18px;
}

.results {
  padding: 14px 0 36px;
  opacity: 0;
  transform: translateY(42px);
  scroll-margin-top: 88px;
}

body.is-results-mode .results {
  opacity: 1;
  transform: translateY(0);
}

body.is-results-transition .hero {
  transform: translateY(-60px);
}

body.is-results-transition .homeSearch {
  transform: translateY(-108px) scale(0.985);
}

body.is-results-transition .heroLogoWrap,
body.is-results-transition .heroWordmark,
body.is-results-transition .brandNote,
body.is-results-transition .actions,
body.is-results-transition .topics,
body.is-results-transition .metaRow {
  opacity: 0;
  transform: translateY(-28px);
  filter: blur(6px);
}

body.is-results-transition .homeSearch .searchBox {
  box-shadow: 0 16px 36px rgba(14, 76, 120, 0.18);
}

.resultsMeta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
  font-size: 13px;
  padding: 10px 6px 14px;
}

.resultsMeta code {
  font-family: var(--mono);
  overflow-wrap: anywhere;
}

.liveToggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  user-select: none;
}

.liveToggle input {
  width: 14px;
  height: 14px;
}

.dot {
  opacity: 0.7;
}

.emptyState {
  padding: 12px 6px 18px;
}

.emptyTitle {
  font-weight: 600;
}

.emptyText {
  margin-top: 6px;
  color: var(--muted);
}

.resultsList {
  list-style: none;
  padding: 0 6px;
  margin: 0;
  display: grid;
  gap: 18px;
}

.result {
  padding: 0;
}

.resultTopRow {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: 8px;
}

.resultLang {
  font-size: 11px;
  font-weight: 600;
  padding: 1px 6px;
  background: rgba(16, 135, 203, 0.1);
  border-radius: 4px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

@media (prefers-color-scheme: dark) {
  .resultLang {
    background: rgba(105, 183, 255, 0.14);
  }
}

.resultTitle {
  font-size: 18px;
  font-weight: 400;
  color: var(--link);
  text-decoration: none;
  display: inline-block;
}

.resultTitle:visited {
  color: var(--visited);
}

.resultTitle:focus,
.resultTitle:hover {
  text-decoration: underline;
}

.resultSnippet {
  margin-top: 6px;
  color: var(--text);
  line-height: 1.55;
  font-size: 14px;
}

mark {
  background: rgba(30, 214, 211, 0.24);
  color: inherit;
  padding: 0 2px;
  border-radius: 3px;
}

kbd {
  font-family: var(--mono);
  font-size: 12px;
  padding: 1px 6px;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: transparent;
}

.footer {
  border-top: 1px solid var(--border);
  padding: 14px 16px;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

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

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

.srOnly {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.summarizeBtn {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 4px 10px;
  font-size: 13px;
  color: var(--muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.summarizeBtn:hover {
  background: var(--shadow-soft);
  border-color: var(--border-2);
  color: var(--text);
}

.summarizeBtn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.summaryCard {
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  margin: 12px 6px 24px;
  box-shadow: var(--shadow-soft);
}

@media (prefers-color-scheme: dark) {
  .summaryCard {
    background: rgba(17, 35, 49, 0.9);
  }
}

.summaryTitle {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.summaryText {
  line-height: 1.6;
  font-size: 15px;
}

.summaryText p {
  margin: 0 0 12px;
}

.summaryText p:last-child {
  margin-bottom: 0;
}

.summaryText ul,
.summaryText ol {
  margin: 0 0 12px 20px;
  padding: 0;
}

.summaryText li + li {
  margin-top: 6px;
}

.summaryText a {
  color: var(--link);
}

.summaryText strong {
  font-weight: 700;
}

.summaryText code {
  font-family: var(--mono);
  font-size: 0.95em;
  padding: 1px 5px;
  border-radius: 4px;
  background: rgba(16, 135, 203, 0.1);
}

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

.summaryLoading {
  display: inline-block;
  width: 12px;
  height: 12px;
  border: 2px solid var(--muted);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

@media (prefers-reduced-motion: reduce) {
  .topbar,
  .hero,
  .homeSearch,
  .heroLogoWrap,
  .heroWordmark,
  .brandNote,
  .actions,
  .topics,
  .metaRow,
  .results {
    transition: none;
  }
}

@media (max-width: 560px) {
  .main {
    width: min(var(--max), calc(100% - 20px));
  }

  .topbar {
    gap: 10px;
    padding: 10px 12px;
  }

  .topbarBrand {
    order: 1;
  }

  .topbar > .iconBtn {
    order: 2;
    margin-left: auto;
  }

  .topbarSearch {
    order: 3;
    flex: 1 1 100%;
    width: 100%;
  }

  .heroLogo {
    width: 92px;
    height: 92px;
  }

  .heroWordmark {
    font-size: 62px;
    margin: 0 0 14px;
  }

  .hero {
    width: 100%;
  }

  .actions {
    flex-direction: column;
    gap: 10px;
  }

  .newsletterForm {
    grid-template-columns: 1fr;
  }

  .actionBtn {
    width: 100%;
  }

  .topics {
    align-items: stretch;
  }

  .topicChips {
    justify-content: flex-start;
  }

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

  .status {
    text-align: left;
  }

  .resultsMeta {
    align-items: flex-start;
    gap: 8px;
  }

  .dot {
    display: none;
  }

  .topbarSearch {
    max-width: none;
  }

  .modalContent {
    width: min(100%, calc(100% - 16px));
  }

  .modalHeader,
  .modalBody,
  .modalFooter {
    padding-left: 16px;
    padding-right: 16px;
  }
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(4, 20, 32, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(2px);
}

.modal[hidden] {
  display: none !important;
}

.modalContent {
  background: var(--bg);
  border-radius: 12px;
  width: min(500px, 90%);
  max-height: 90vh;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  display: flex;
  flex-direction: column;
}

.modalHeader {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modalHeader h2 {
  margin: 0;
  font-size: 18px;
}

.modalBody {
  padding: 20px;
  overflow-y: auto;
}

.modalFooter {
  padding: 16px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
}

.closeBtn {
  background: transparent;
  border: none;
  font-size: 24px;
  color: var(--muted);
  cursor: pointer;
}

.settingsSection {
  margin-bottom: 24px;
}

.settingsSection h3 {
  margin: 0 0 12px 0;
  font-size: 14px;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.5px;
}

.creditStatus {
  background: rgba(16, 135, 203, 0.06);
  padding: 12px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 20px;
  text-align: center;
}

.settingItem {
  margin-bottom: 16px;
}

.switchLabel {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-size: 15px;
}

.formGroup {
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.formGroup label {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
}

.formGroup input {
  padding: 10px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font-size: 14px;
  outline: none;
}

.formGroup input:focus {
  border-color: var(--link);
}

.summaryCard.error {
  border-color: var(--danger);
  background: rgba(195, 58, 50, 0.04);
}

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