:root {
  color-scheme: light;
  --ink: #22313a;
  --muted: #5d6970;
  --paper: #fffaf0;
  --base: #fbf7ee;
  --line: #d9d0bf;
  --teal: #1f7a7a;
  --teal-dark: #155d5c;
  --coral: #db6b57;
  --yellow: #f3c84b;
  --green: #708a5d;
  --shadow: 0 18px 45px rgba(34, 49, 58, .11);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 0;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    linear-gradient(180deg, #fffdf8 0, var(--base) 360px, #f7f1e4 100%);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.75;
  letter-spacing: 0;
}

img,
svg,
video {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--teal-dark);
  text-decoration-thickness: .08em;
  text-underline-offset: .18em;
}

button,
input,
select,
textarea {
  font: inherit;
}

.lab-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 18px 18px 10px;
}

.lab-brand {
  flex: 0 0 auto;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.lab-header nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 14px;
  font-size: .95rem;
}

.lab-header nav a {
  color: var(--ink);
  text-decoration: none;
}

.lab-header nav a.is-current {
  color: var(--teal-dark);
  font-weight: 700;
}

.lab-compact-notice,
.lab-site-notice {
  max-width: 1160px;
  margin: 0 auto 16px;
  padding: 10px 18px;
  color: #314047;
  font-size: .9rem;
}

.lab-compact-notice {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.lab-site-notice {
  background: #f5fbf8;
  border: 1px solid #c9ddd6;
}

.lab-site-notice p {
  margin: 0;
}

.lab-site-notice p + p {
  margin-top: 4px;
}

.lab-site-notice.is-compact {
  max-width: 960px;
  margin: 10px auto 18px;
  padding: 9px 12px;
  background: #fffdf8;
  border: 1px solid var(--line);
  border-left: 4px solid var(--line);
  font-size: .82rem;
}

.lab-site-notice.is-compact strong {
  font-weight: 700;
}

.lab-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 520px);
  align-items: center;
  gap: clamp(24px, 5vw, 64px);
  max-width: 1160px;
  margin: 0 auto;
  padding: clamp(22px, 4.2vw, 48px) 18px 30px;
}

.lab-hero-copy h1,
.tool-hero h1 {
  margin: 0;
  font-size: clamp(2.25rem, 5.4vw, 5.1rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.lab-kicker {
  margin: 0 0 10px;
  color: var(--coral);
  font-weight: 800;
  font-size: .93rem;
}

.lab-lead {
  max-width: 640px;
  margin-top: 22px;
  font-size: clamp(1rem, 1.4vw, 1.12rem);
}

.lab-lead p {
  margin: 0 0 18px;
}

.lab-safety-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  color: var(--teal-dark);
  font-size: .94rem;
  font-weight: 800;
}

.lab-safety-list li {
  border: 1px solid #c7ddd6;
  border-radius: 6px;
  padding: 6px 10px;
  background: #f6fbf8;
}

.lab-actions,
.output-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.lab-button,
button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--teal);
  border-radius: 6px;
  padding: 10px 16px;
  background: #fff;
  color: var(--teal-dark);
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
}

.lab-button.primary,
button:first-child {
  background: var(--teal);
  color: #fff;
}

.lab-button.ghost {
  border-color: var(--line);
  color: var(--ink);
}

.lab-hero-visual {
  margin: 0;
}

.lab-hero-visual img {
  overflow: hidden;
  border: 1px solid rgba(34, 49, 58, .08);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.lab-band {
  max-width: 1160px;
  margin: 0 auto;
  padding: 46px 18px;
}

.lab-band.soft {
  border-top: 1px solid var(--line);
}

.lab-section-head {
  max-width: 760px;
}

.lab-section-head h2,
.tool-panel h2 {
  margin: 0 0 8px;
  font-size: clamp(1.55rem, 3vw, 2.25rem);
  line-height: 1.25;
  letter-spacing: 0;
}

.lab-section-head p {
  margin: 0 0 18px;
}

.lab-tool-card,
.tool-panel,
.treaty-paper {
  background: rgba(255, 255, 255, .82);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(34, 49, 58, .07);
}

.lab-tool-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: clamp(18px, 4vw, 30px);
}

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

.lab-check-list {
  margin: 0;
  padding-left: 1.2em;
}

.lab-link-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.lab-link-grid a {
  display: flex;
  min-height: 72px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fff;
  text-decoration: none;
  font-weight: 800;
}

.lab-legacy-links {
  max-width: 1160px;
  margin: 0 auto;
  padding: 22px 18px 4px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .9rem;
}

.lab-legacy-links span {
  display: inline-block;
  margin-right: 8px;
  font-weight: 700;
}

.lab-legacy-links a {
  display: inline-block;
  margin: 0 10px 6px 0;
  color: var(--muted);
}

.lab-footer {
  max-width: 1160px;
  margin: 34px auto 0;
  padding: 22px 18px 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: .92rem;
}

.lab-footer p {
  margin: 0 0 6px;
}

.lab-legacy-note {
  margin: 16px 0 22px;
  padding: 14px 16px;
  border-left: 5px solid var(--teal);
  background: #f2fbf9;
  color: #273942;
}

.lab-legacy-note p {
  margin: 0 0 8px;
}

.lab-legacy-note p:last-child {
  margin-bottom: 0;
}

.lab-android-note {
  border-left-color: var(--coral);
  background: #fff6f1;
}

.tool-main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 18px 48px;
}

.tool-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 360px);
  gap: 18px;
  align-items: end;
  margin-bottom: 24px;
}

.tool-hero p {
  max-width: 760px;
}

.tool-safety {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 16px;
  list-style: none;
  background: #f5fbf8;
  border: 1px solid #c9ddd6;
  border-radius: 8px;
  font-weight: 800;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(300px, 430px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.tool-panel {
  padding: clamp(16px, 3vw, 24px);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

label,
legend {
  color: var(--ink);
  font-weight: 800;
}

input,
select,
textarea {
  width: 100%;
  margin-top: 6px;
  border: 1px solid #bfc8c3;
  border-radius: 6px;
  padding: 10px 11px;
  background: #fff;
  color: var(--ink);
}

textarea {
  resize: vertical;
  min-height: 112px;
}

.number-unit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 7px;
  font-weight: 700;
}

fieldset {
  min-width: 0;
  margin: 18px 0 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px 14px;
}

.check-line {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 9px 0;
  font-weight: 700;
}

.check-line input {
  width: auto;
  margin: 0;
}

.memo-label {
  display: block;
  margin-top: 18px;
}

.output-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.output-actions {
  margin-top: 0;
}

.copy-status {
  min-height: 1.6em;
  margin: 8px 0 10px;
  color: var(--teal-dark);
  font-weight: 800;
}

.treaty-paper {
  padding: clamp(16px, 3vw, 28px);
  background: #fffdf7;
}

.treaty-paper h3 {
  margin: 0 0 12px;
  font-size: 1.45rem;
}

.treaty-paper h4 {
  margin: 22px 0 8px;
  font-size: 1.1rem;
}

.treaty-paper ul {
  padding-left: 1.25em;
}

.treaty-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 8px;
  font-size: .95rem;
}

.treaty-table th,
.treaty-table td {
  border: 1px solid var(--line);
  padding: 8px;
  text-align: left;
  vertical-align: top;
}

.treaty-table th {
  background: #f6ead0;
}

.copy-box {
  margin-top: 16px;
}

.copy-box textarea {
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: .9rem;
}

@media (max-width: 900px) {
  .lab-hero,
  .tool-hero,
  .tool-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .lab-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .lab-header nav {
    justify-content: flex-start;
  }

  .lab-hero,
  .tool-main,
  .lab-band,
  .lab-legacy-links {
    padding-left: 14px;
    padding-right: 14px;
  }

  .lab-tool-card,
  .field-grid,
  .output-head {
    grid-template-columns: 1fr;
  }

  .lab-tool-card,
  .output-head {
    display: grid;
  }

  .lab-actions,
  .output-actions {
    width: 100%;
  }

  .lab-button,
  button {
    width: 100%;
  }

  .tool-panel {
    padding: 14px;
  }

  .treaty-table {
    font-size: .86rem;
  }
}

@media print {
  body {
    background: #fff;
  }

  .lab-header,
  .lab-compact-notice,
  .lab-footer,
  .tool-hero,
  .input-panel,
  .output-actions,
  .copy-status,
  .copy-box {
    display: none !important;
  }

  .tool-main,
  .tool-layout,
  .output-panel {
    display: block;
    max-width: none;
    margin: 0;
    padding: 0;
  }

  .tool-panel,
  .treaty-paper {
    border: 0;
    box-shadow: none;
  }
}