:root {
  color-scheme: light;
  --ink: #111410;
  --paper: #f3f0e8;
  --paper-deep: #e7e4dc;
  --white: #ffffff;
  --acid: #c8f56a;
  --muted: #55594f;
  --rule: #b8bbb2;
  --control: #60645c;
  --font-ui: "Segoe UI", "Microsoft JhengHei", system-ui, sans-serif;
  --font-editorial: Georgia, "Times New Roman", serif;
  --content: 70rem;
  --gutter: clamp(1rem, 4vw, 2rem);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 1rem;
}

body {
  min-width: 0;
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.2em;
}

a:hover {
  text-decoration-thickness: 0.13em;
}

:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 3px;
  box-shadow: 0 0 0 5px var(--acid);
}

::selection {
  background: var(--acid);
  color: var(--ink);
}

.skip-link {
  position: absolute;
  z-index: 10;
  top: 0.5rem;
  left: var(--gutter);
  min-height: 44px;
  padding: 0.55rem 0.85rem;
  transform: translateY(-160%);
  border: 2px solid var(--ink);
  border-radius: 0.375rem;
  background: var(--white);
  font-weight: 700;
}

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

.page-shell {
  width: min(100%, var(--content));
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.site-header {
  display: flex;
  min-height: 5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--rule);
}

.brand {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 0.65rem;
  color: var(--ink);
  font-size: 1.125rem;
  font-weight: 750;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.brand-mark {
  width: 1.35rem;
  height: 1.35rem;
  border: 2px solid var(--ink);
  background: var(--acid);
}

.header-nav,
.primary-nav,
.language-nav {
  display: flex;
  align-items: center;
}

.header-nav {
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem 1.25rem;
}

.primary-nav {
  gap: 0.25rem;
}

.primary-nav a,
.language-nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  padding: 0.4rem 0.35rem;
  font-size: 0.9375rem;
  font-weight: 600;
}

.language-nav {
  gap: 0.25rem;
  padding-left: 0.8rem;
  border-left: 1px solid var(--rule);
}

.language-nav a[aria-current="page"] {
  text-decoration-thickness: 0.14em;
}

main {
  padding-bottom: 5rem;
}

.hero {
  padding-block: clamp(3.5rem, 8vw, 6.5rem) clamp(2.5rem, 5vw, 4rem);
}

.hero h1 {
  max-width: 15ch;
  margin: 0;
  font-family: var(--font-editorial);
  font-size: clamp(3rem, 8.5vw, 6.5rem);
  font-weight: 500;
  letter-spacing: -0.065em;
  line-height: 0.98;
  text-wrap: balance;
}

.hero-copy {
  display: flex;
  max-width: 55rem;
  align-items: end;
  justify-content: space-between;
  gap: 2rem;
  margin-top: 1.75rem;
}

.hero-copy p {
  max-width: 42rem;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.0625rem, 2vw, 1.25rem);
  line-height: 1.65;
}

.primary-action {
  display: inline-flex;
  min-width: 8.25rem;
  min-height: 48px;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border: 2px solid var(--ink);
  border-radius: 0.375rem;
  background: var(--acid);
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
  transition: background-color 140ms ease, transform 140ms ease;
}

.primary-action:hover {
  background: #b6e75b;
}

.primary-action:active {
  transform: translateY(1px);
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1rem;
}

.section-heading h2,
.about h2 {
  margin: 0;
  font-size: clamp(1.75rem, 4vw, 2.25rem);
  font-weight: 680;
  letter-spacing: -0.045em;
  line-height: 1.2;
}

.section-heading p {
  max-width: 33rem;
  margin: 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.tool-list,
.recent-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.tool-list {
  border-top: 2px solid var(--ink);
}

.tool-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.82fr);
  gap: clamp(1.25rem, 4vw, 3.25rem);
  padding: clamp(1.5rem, 4vw, 2.5rem) 0;
  border-bottom: 1px solid var(--rule);
}

.tool-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
}

.tool-copy h3 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 680;
  letter-spacing: -0.04em;
  line-height: 1.2;
}

.tool-description,
.tool-use-case {
  max-width: 42rem;
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.tool-use-case {
  margin-top: 0.35rem;
  font-size: 0.9375rem;
}

.tool-action {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  margin-top: 1rem;
  font-weight: 700;
  text-decoration: underline;
  text-decoration-thickness: 0.1em;
  text-underline-offset: 0.25em;
}

.tool-example {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  padding: 1.25rem clamp(1rem, 3vw, 1.75rem);
  border-left: 4px solid var(--acid);
  background: var(--white);
}

.example-label {
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 650;
}

.example-value {
  margin: 0.45rem 0 0;
  font-family: var(--font-ui);
  font-size: clamp(1.1rem, 2.7vw, 1.6rem);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.example-detail {
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.9375rem;
}

.recent {
  margin-top: clamp(3.5rem, 7vw, 5.5rem);
  padding: clamp(1.5rem, 4vw, 2.5rem);
  background: var(--paper-deep);
}

.recent .section-heading {
  margin-bottom: 0.6rem;
}

.recent-list {
  border-top: 1px solid var(--rule);
}

.recent-row {
  display: flex;
  min-height: 52px;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--rule);
}

.recent-row a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  font-weight: 650;
}

.recent-row time {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.about {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(1.5rem, 5vw, 4rem);
  margin-top: clamp(4rem, 8vw, 6.5rem);
  padding-top: 2rem;
  border-top: 2px solid var(--ink);
}

.about-intro p {
  max-width: 32rem;
  margin: 0.85rem 0 0;
  color: var(--muted);
}

.faq h3 {
  margin: 0 0 0.75rem;
  font-size: 1.125rem;
}

.faq details {
  border-top: 1px solid var(--rule);
}

.faq details:last-child {
  border-bottom: 1px solid var(--rule);
}

.faq summary {
  min-height: 48px;
  padding: 0.75rem 0.1rem;
  cursor: pointer;
  font-weight: 650;
}

.faq details p {
  max-width: 48rem;
  margin: 0 0 1rem;
  color: var(--muted);
}

.empty-state {
  margin: 0;
  padding: 1.5rem 0;
  border-top: 2px solid var(--ink);
  color: var(--muted);
}

.site-footer {
  display: flex;
  min-height: 5rem;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 0.9375rem;
}

.site-footer a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: var(--ink);
  font-weight: 650;
}

@media (max-width: 48rem) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0;
    padding-block: 0.5rem;
  }

  .header-nav {
    width: 100%;
    justify-content: flex-start;
    gap: 0.25rem 0.75rem;
  }

  .language-nav {
    padding-left: 0.45rem;
  }

  .hero-copy {
    align-items: flex-start;
    flex-direction: column;
    gap: 1.25rem;
  }

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

  .tool-example {
    min-height: 8rem;
  }

  .about {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }
}

@media (max-width: 23rem) {
  .header-nav {
    gap: 0.1rem 0.35rem;
  }

  .primary-nav a,
  .language-nav a {
    font-size: 0.875rem;
  }

  .recent {
    padding-inline: 1rem;
  }

  .recent-row {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 0;
    padding-block: 0.45rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}