:root {
  color-scheme: light;
  --blue: #155eef;
  --blue-strong: #0f4fd6;
  --blue-soft: #eff6ff;
  --blue-line: #cbdcff;
  --ink: #0f172a;
  --muted: #526176;
  --subtle: #718096;
  --line: #dce4ee;
  --background: #f6f9fc;
  --surface: #fdfefe;
  --sidebar: #f9fbfd;
  --success: #137a43;
  --sidebar-width: 252px;
  --content-width: 1120px;
  --card-radius: 14px;
  --control-radius: 9px;
  font-family: "Avenir Next", "PingFang SC", "Hiragino Sans GB", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--background);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

body.menu-open {
  overflow: hidden;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button,
.button {
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease, transform 120ms ease;
}

button:active,
.button:active {
  transform: translateY(1px);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible {
  outline: 3px solid #8fb5ff;
  outline-offset: 3px;
}

[hidden] {
  display: none !important;
}

.skip-link {
  position: fixed;
  left: 14px;
  top: 14px;
  z-index: 30;
  transform: translateY(-150%);
  background: var(--ink);
  color: var(--surface);
  padding: 8px 12px;
  border-radius: var(--control-radius);
}

.skip-link:focus {
  transform: translateY(0);
}

.sidebar {
  position: fixed;
  inset: 0 auto 0 0;
  z-index: 20;
  width: var(--sidebar-width);
  display: flex;
  flex-direction: column;
  padding: 24px 18px;
  background: var(--sidebar);
  border-right: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 52px;
  padding: 4px 10px;
  text-decoration: none;
}

.brand img {
  width: 38px;
  height: 30px;
}

.brand-name {
  font-size: 20px;
  font-weight: 750;
  letter-spacing: -0.5px;
}

.brand-domain {
  display: block;
  margin-top: -3px;
  color: var(--subtle);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.primary-nav {
  display: grid;
  gap: 5px;
  margin-top: 34px;
}

.nav-link {
  display: grid;
  grid-template-columns: 3px minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  min-height: 45px;
  padding: 9px 10px 9px 7px;
  color: #344258;
  text-decoration: none;
  border-radius: var(--control-radius);
}

.nav-link::before {
  content: "";
  width: 3px;
  height: 21px;
  border-radius: 2px;
  background: transparent;
}

.nav-link:hover {
  background: #f0f5fb;
  color: var(--ink);
}

.nav-link[aria-current="page"] {
  background: var(--blue-soft);
  color: #1049b6;
  font-weight: 700;
}

.nav-link[aria-current="page"]::before {
  background: var(--blue);
}

.soon-label {
  padding: 1px 6px;
  border: 1px solid var(--blue-line);
  border-radius: 6px;
  color: #31598f;
  background: #f5f9ff;
  font-size: 10px;
  font-weight: 650;
  white-space: nowrap;
}

.sidebar-foot {
  margin-top: auto;
  padding: 18px 10px 4px;
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 12px;
}

.topbar {
  display: none;
}

.backdrop {
  position: fixed;
  inset: 0;
  z-index: 15;
  background: rgb(15 23 42 / 0.38);
  border: 0;
  border-radius: 0;
}

.site-main {
  min-height: 100dvh;
  margin-left: var(--sidebar-width);
}

.page-wrap {
  width: min(100%, calc(var(--content-width) + 64px));
  margin: 0 auto;
  padding: 56px 32px 72px;
}

.page-kicker {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.page-title {
  max-width: 760px;
  margin: 0;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.045em;
}

.page-lead {
  max-width: 640px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.75;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 17px;
  border: 1px solid transparent;
  border-radius: var(--control-radius);
  text-decoration: none;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.button-primary {
  background: var(--blue);
  color: #f8fbff;
}

.button-primary:hover {
  background: var(--blue-strong);
}

.button-secondary {
  border-color: #b7c5d7;
  background: var(--surface);
  color: var(--ink);
}

.button-secondary:hover {
  border-color: #86a4ca;
  background: var(--blue-soft);
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(340px, 0.88fr);
  align-items: center;
  gap: clamp(44px, 7vw, 96px);
  min-height: calc(100dvh - 128px);
  padding: 18px 0 64px;
}

.hero-copy .page-title {
  max-width: 680px;
}

.hero-copy .page-lead {
  max-width: 570px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-top: 30px;
}

.hero-brief {
  position: relative;
  overflow: hidden;
  min-height: 430px;
  padding: 28px;
  border: 1px solid var(--blue-line);
  border-radius: var(--card-radius);
  background: #f1f6ff;
}

.hero-brief::after {
  content: "FF";
  position: absolute;
  right: -22px;
  bottom: -92px;
  color: rgb(21 94 239 / 0.07);
  font-size: 210px;
  font-weight: 800;
  letter-spacing: -0.12em;
  line-height: 1;
  pointer-events: none;
}

.brief-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--blue-line);
}

.brief-header strong {
  font-size: 18px;
}

.brief-header span {
  color: var(--blue-strong);
  font-size: 12px;
  font-weight: 700;
}

.brief-numbers {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  padding: 32px 0 28px;
}

.brief-number strong {
  display: block;
  color: var(--blue);
  font: 720 52px/1 ui-monospace, SFMono-Regular, Menlo, monospace;
  letter-spacing: -0.06em;
}

.brief-number span {
  display: block;
  margin-top: 9px;
  color: var(--muted);
  font-size: 13px;
}

.brief-topics {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7px 18px;
  margin: 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--blue-line);
  list-style: none;
  color: #40516a;
  font-size: 13px;
}

.launch-section {
  padding: 70px 0 20px;
  border-top: 1px solid var(--line);
}

.section-title {
  margin: 0;
  font-size: clamp(27px, 3vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.section-copy {
  max-width: 620px;
  margin: 14px 0 0;
  color: var(--muted);
}

.module-list {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 14px;
  margin-top: 34px;
}

.module-row {
  display: flex;
  min-height: 126px;
  align-items: flex-start;
  justify-content: space-between;
  gap: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  background: var(--surface);
  text-decoration: none;
}

.module-row:nth-child(2),
.module-row:nth-child(3) {
  background: #f4f8ff;
}

.module-row:hover {
  border-color: #9ab9eb;
}

.module-row h3 {
  margin: 0;
  font-size: 18px;
}

.module-row p {
  max-width: 360px;
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.module-state {
  flex: none;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--blue-soft);
  color: #31598f;
  font-size: 11px;
  font-weight: 700;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 72px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 12px;
}

.interview-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 36px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--line);
}

.interview-head .page-title {
  font-size: clamp(34px, 4vw, 50px);
}

.interview-head .page-lead {
  margin-top: 12px;
  font-size: 16px;
}

.print-button {
  flex: none;
  min-height: 42px;
  padding: 9px 14px;
  border: 1px solid #b7c5d7;
  border-radius: var(--control-radius);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
  font-weight: 650;
  white-space: nowrap;
}

.print-button:hover {
  border-color: #86a4ca;
  background: var(--blue-soft);
}

.topic-strip {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  margin: 24px -2px 0;
  padding: 2px 2px 9px;
  scrollbar-width: thin;
}

.topic-strip button {
  flex: none;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: var(--control-radius);
  background: var(--surface);
  color: #415069;
  cursor: pointer;
  font-size: 13px;
}

.topic-strip button:hover,
.topic-strip button[aria-pressed="true"] {
  border-color: #9ab9eb;
  background: var(--blue-soft);
  color: #1049b6;
}

.question-toolbar {
  scroll-margin-top: 18px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) 130px 130px;
  gap: 12px;
  margin-top: 20px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  background: var(--surface);
}

.field-label {
  display: block;
  color: #425168;
  font-size: 12px;
  font-weight: 650;
}

.field-label input,
.field-label select {
  display: block;
  width: 100%;
  height: 42px;
  margin-top: 5px;
  padding: 8px 11px;
  border: 1px solid #a9b7c8;
  border-radius: var(--control-radius);
  background: var(--surface);
  color: var(--ink);
}

.filter-actions {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 4px;
}

#result {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.reset-button {
  padding: 6px 9px;
  border: 0;
  border-radius: var(--control-radius);
  background: transparent;
  color: #285da8;
  cursor: pointer;
  font-size: 13px;
}

.reset-button:hover {
  background: var(--blue-soft);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  margin: 18px 0;
  color: var(--muted);
  font-size: 13px;
}

.pagination label {
  display: flex;
  align-items: center;
  gap: 7px;
}

.pagination button,
.pagination select {
  min-height: 36px;
  padding: 6px 10px;
  border: 1px solid #acbacb;
  border-radius: var(--control-radius);
  background: var(--surface);
  color: var(--ink);
}

.pagination button {
  cursor: pointer;
}

.pagination button:hover:not(:disabled) {
  background: var(--blue-soft);
}

.pagination button:disabled {
  cursor: default;
  opacity: 0.42;
}

.question {
  scroll-margin-top: 20px;
  margin-bottom: 15px;
  padding: 27px 30px;
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  background: var(--surface);
}

.question-head {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: start;
  gap: 16px;
}

.question-number {
  color: var(--blue);
  font: 720 24px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace;
}

.question-category {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 12px;
}

.question h2 {
  margin: 0;
  font-size: 21px;
  line-height: 1.5;
  letter-spacing: -0.018em;
}

.permalink {
  padding: 4px 8px;
  color: #718096;
  text-decoration: none;
}

.question-meta {
  margin: 15px 0 20px 60px;
  color: var(--muted);
  font-size: 12px;
}

.question-prompt {
  margin-left: 60px;
}

.question-prompt p {
  margin: 10px 0;
}

.question details {
  margin: 22px 0 0 60px;
  padding-top: 15px;
  border-top: 1px solid var(--line);
}

.question summary {
  cursor: pointer;
  color: #154fa8;
  font-weight: 700;
}

.question details[open] summary {
  margin-bottom: 14px;
}

.answer {
  color: #26364c;
  font-size: 15px;
}

.answer p {
  margin: 10px 0;
}

.score {
  margin-top: 20px;
  padding: 15px 17px;
  border-left: 3px solid var(--blue);
  background: var(--blue-soft);
}

.score p {
  margin-bottom: 0;
}

pre {
  overflow: auto;
  padding: 17px;
  border-radius: var(--control-radius);
  background: #eef3f8;
  font-size: 13px;
  line-height: 1.65;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  overflow-wrap: anywhere;
}

table {
  display: block;
  width: 100%;
  overflow-x: auto;
  border-collapse: collapse;
  font-size: 14px;
}

th,
td {
  padding: 9px 11px;
  border: 1px solid var(--line);
  text-align: left;
}

th {
  background: #eef4fb;
}

#empty {
  padding: 46px 20px;
  border: 1px dashed #aebdce;
  border-radius: var(--card-radius);
  color: var(--muted);
  text-align: center;
}

.guide {
  margin-top: 18px;
  padding: 19px 22px;
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  background: var(--surface);
  scroll-margin-top: 18px;
}

.guide summary {
  cursor: pointer;
  color: var(--ink);
  font-weight: 750;
}

.guide h2 {
  margin-top: 24px;
  font-size: 22px;
}

.guide h3 {
  font-size: 17px;
}

.source-link {
  display: inline-block;
  margin-top: 18px;
  color: #1555b6;
  font-weight: 650;
}

.placeholder-page {
  display: grid;
  align-content: center;
  min-height: calc(100dvh - 128px);
  max-width: 760px;
  padding: 42px 0 96px;
}

.placeholder-mark {
  width: 68px;
  height: 4px;
  margin-bottom: 34px;
  border-radius: 2px;
  background: var(--blue);
}

.placeholder-state {
  width: fit-content;
  margin-bottom: 18px;
  padding: 5px 10px;
  border: 1px solid var(--blue-line);
  border-radius: 999px;
  background: var(--blue-soft);
  color: #31598f;
  font-size: 12px;
  font-weight: 700;
}

.placeholder-page .page-lead {
  max-width: 580px;
}

.placeholder-page .button {
  width: fit-content;
  margin-top: 30px;
}

@media (max-width: 1050px) {
  .home-hero {
    grid-template-columns: 1fr 330px;
    gap: 42px;
  }

  .module-list {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 859px) {
  .topbar {
    position: sticky;
    top: 0;
    z-index: 12;
    display: flex;
    height: 64px;
    align-items: center;
    justify-content: space-between;
    padding: 0 18px;
    border-bottom: 1px solid var(--line);
    background: rgb(249 251 253 / 0.96);
    backdrop-filter: blur(12px);
  }

  .topbar .brand {
    min-height: auto;
    padding: 0;
  }

  .topbar .brand img {
    width: 31px;
    height: 24px;
  }

  .topbar .brand-domain {
    display: none;
  }

  .menu-button {
    width: 42px;
    height: 40px;
    border: 1px solid #b7c5d7;
    border-radius: var(--control-radius);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
    font-size: 0;
  }

  .menu-button::before,
  .menu-button::after {
    content: "";
    display: block;
    width: 18px;
    height: 2px;
    margin: 5px auto;
    border-radius: 2px;
    background: currentColor;
  }

  .sidebar {
    width: min(86vw, 300px);
    transform: translateX(-105%);
    transition: transform 180ms ease;
  }

  .sidebar[data-open="true"] {
    transform: translateX(0);
  }

  .site-main {
    margin-left: 0;
  }

  .page-wrap {
    padding: 38px 22px 58px;
  }

  .home-hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 22px;
  }

  .hero-brief {
    min-height: 380px;
  }

  .interview-head {
    align-items: flex-start;
    flex-direction: column;
    gap: 20px;
  }
}

@media (max-width: 620px) {
  .page-wrap {
    padding: 30px 16px 48px;
  }

  .page-title {
    font-size: 36px;
  }

  .page-lead {
    font-size: 16px;
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .hero-actions .button {
    width: 100%;
  }

  .hero-brief {
    min-height: 360px;
    padding: 22px;
  }

  .brief-number strong {
    font-size: 44px;
  }

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

  .site-footer {
    flex-direction: column;
    gap: 5px;
  }

  .question-toolbar {
    grid-template-columns: 1fr;
    padding: 15px;
  }

  .filter-actions {
    grid-column: auto;
  }

  .pagination {
    justify-content: center;
  }

  .question {
    padding: 22px 18px;
  }

  .question-head {
    grid-template-columns: 36px minmax(0, 1fr) auto;
    gap: 10px;
  }

  .question h2 {
    font-size: 18px;
  }

  .question-number {
    font-size: 21px;
  }

  .question-meta,
  .question-prompt,
  .question details {
    margin-left: 46px;
  }

  .placeholder-page {
    min-height: calc(100dvh - 124px);
  }
}

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

@media print {
  body {
    background: #fdfefe;
    font-size: 11pt;
  }

  .sidebar,
  .topbar,
  .topic-strip,
  .question-toolbar,
  .pagination,
  .print-button,
  .permalink,
  .site-footer {
    display: none !important;
  }

  .site-main {
    margin: 0;
  }

  .page-wrap {
    width: auto;
    padding: 0;
  }

  .interview-head {
    padding-bottom: 16px;
  }

  .question {
    padding: 15px 0;
    border: 0;
    border-top: 1px solid #9aa5b1;
    border-radius: 0;
  }

  .question-head,
  summary {
    break-after: avoid;
  }

  .score {
    break-inside: avoid;
  }

  pre {
    white-space: pre-wrap;
    overflow-wrap: anywhere;
  }

  table {
    display: table;
  }

  details::details-content {
    content-visibility: visible;
  }
}