:root {
  --color-primary: #635bff;
  --color-secondary: #706f68;
  --color-tertiary: #e6e3dc;
  --color-neutral: #faf9f6;
  --color-surface: #ffffff;
  --color-on-surface: #18180f;
  --color-border: #e5e7eb;
  --color-muted: #9ca3af;
  --color-error: #d92d20;
  --color-warning: #b45309;
  --color-success: #1e7b4b;
  --font-sans: Geist, Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: "Playfair Display", Georgia, serif;
  --font-mono: Inter, "SF Mono", "Cascadia Code", ui-monospace, monospace;
  --space-xs: 2px;
  --space-sm: 6px;
  --space-md: 10px;
  --space-lg: 16px;
  --space-xl: 20px;
  --space-base: 24px;
  --space-gutter: 32px;
  --space-margin: 40px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
}

.headline-display {
  font-family: var(--font-serif);
  font-size: clamp(42px, 8vw, 57px);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: -1.134px;
}

.headline-lg {
  font-size: clamp(30px, 5vw, 41px);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 1.2px;
}

.headline-md {
  font-size: 30px;
  font-weight: 600;
  line-height: 36px;
  letter-spacing: -0.6px;
}

.headline-sm {
  font-size: 22px;
  font-weight: 600;
  line-height: 26px;
}

.body-lg {
  font-size: 18px;
  font-weight: 600;
  line-height: 28px;
}

.body-md {
  font-size: 16px;
  font-weight: 600;
  line-height: 24px;
  letter-spacing: 1.1px;
}

.body-sm {
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.label-lg {
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.label-md {
  font-size: 12px;
  font-weight: 500;
  line-height: 16px;
  letter-spacing: 0.04em;
}

.label-sm {
  font-size: 11px;
  font-weight: 400;
  line-height: 14px;
  letter-spacing: 0.04em;
}

.mono-sm {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  line-height: 16px;
  letter-spacing: 0.02em;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--color-neutral);
  color: var(--color-on-surface);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.5;
  letter-spacing: 0;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

button,
input,
select {
  font: inherit;
}

button {
  appearance: none;
}

.page-shell {
  width: min(100% - 32px, 1024px);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 249, 246, 0.94);
  border-bottom: 1px solid var(--color-tertiary);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--color-on-surface);
  text-decoration: none;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-tertiary);
  border-radius: 8px;
  background: var(--color-surface);
  display: grid;
  place-items: center;
  color: var(--color-primary);
}

.brand-copy {
  display: grid;
  gap: 1px;
}

.brand-name {
  margin: 0;
  font-size: 18px;
  font-weight: 600;
  line-height: 24px;
}

.brand-subtitle {
  color: var(--color-secondary);
  font-size: 12px;
  font-weight: 500;
  line-height: 16px;
  letter-spacing: 0.04em;
}

.hero {
  padding: 56px 0 36px;
  display: grid;
  gap: 16px;
}

.eyebrow {
  width: fit-content;
  margin: 0;
  padding: 4px 10px;
  border: 1px solid var(--color-tertiary);
  border-radius: 999px;
  color: var(--color-secondary);
  background: var(--color-surface);
  font-size: 11px;
  font-weight: 400;
  line-height: 14px;
  letter-spacing: 0.04em;
}

.hero h1 {
  max-width: 760px;
  margin: 0;
  color: var(--color-on-surface);
  font-family: var(--font-serif);
  font-size: clamp(42px, 8vw, 57px);
  font-weight: 800;
  line-height: 1.03;
  letter-spacing: 0;
}

.doc-hero .headline-lg {
  margin: 0;
  color: var(--color-on-surface);
}

.hero p,
.doc-hero p {
  max-width: 650px;
  margin: 0;
  color: var(--color-secondary);
  font-size: 18px;
  font-weight: 600;
  line-height: 28px;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 6px;
}

.chip,
.tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  width: fit-content;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-secondary);
  font-size: 11px;
  font-weight: 400;
  line-height: 14px;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  white-space: nowrap;
}

.tag-get {
  background: #e6f4ea;
  border-color: #a8d5ba;
  color: var(--color-success);
}

.tag-required {
  background: #fee2e2;
  border-color: #fca5a5;
  color: var(--color-error);
}

.tag-optional {
  background: #f3f4f6;
  color: #6b7280;
}

.button {
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  letter-spacing: 0;
  cursor: pointer;
  transition: opacity 0.2s ease, background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.button-primary,
.btn-primary {
  background: var(--color-primary);
  color: #ffffff;
}

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

.button:hover,
.btn:hover {
  opacity: 0.86;
}

.button:focus-visible,
.btn:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

.tabs {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 20px;
  padding: 6px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
}

.tab {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: transparent;
  color: var(--color-secondary);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  cursor: pointer;
  white-space: nowrap;
}

.tab:hover {
  background: var(--color-neutral);
}

.tab.active {
  background: var(--color-on-surface);
  color: #ffffff;
}

.card {
  display: none;
}

.card.active {
  display: block;
}

.tool-panel,
.doc-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 24px;
}

.tool-header {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  margin-bottom: 20px;
}

.tool-icon {
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-tertiary);
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--color-primary);
  background: var(--color-neutral);
}

.tool-header h2,
.doc-card h3 {
  margin: 0 0 4px;
  color: var(--color-on-surface);
  font-size: 22px;
  font-weight: 600;
  line-height: 26px;
}

.tool-header p,
.doc-card p,
.notice {
  margin: 0;
  color: var(--color-secondary);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.form-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.form-grid-3 {
  grid-template-columns: minmax(0, 2fr) minmax(140px, 1fr) auto;
}

.form-field {
  display: grid;
  gap: 6px;
}

.form-label {
  color: var(--color-on-surface);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.input-text,
.input-select,
input[type="text"],
select {
  width: 100%;
  height: 40px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background-color: var(--color-surface);
  color: var(--color-on-surface);
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

select {
  appearance: none;
  padding-right: 36px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23706F68' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-position: right 12px center;
  background-repeat: no-repeat;
}

input::placeholder {
  color: var(--color-muted);
}

input:focus,
select:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.1);
  outline: none;
}

.notice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid var(--color-tertiary);
  border-radius: 8px;
  background: var(--color-neutral);
}

.notice svg {
  width: 16px;
  height: 16px;
  flex: 0 0 auto;
  margin-top: 2px;
  color: var(--color-secondary);
}

.notice-warning {
  color: var(--color-warning);
  border-color: #fcd34d;
  background: #fffbeb;
}

.notice-error {
  color: var(--color-error);
  border-color: #fca5a5;
  background: #fff7f7;
}

.loading {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 28px 0 8px;
  color: var(--color-secondary);
  font-size: 14px;
  font-weight: 500;
}

.loading.active {
  display: flex;
}

.spinner {
  width: 28px;
  height: 28px;
  border: 3px solid var(--color-tertiary);
  border-top-color: var(--color-primary);
  border-radius: 999px;
  animation: spin 0.8s linear infinite;
}

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

.error {
  display: none;
  margin-top: 16px;
  padding: 12px 14px;
  border: 1px solid #fca5a5;
  border-radius: 8px;
  background: #fff7f7;
  color: var(--color-error);
  font-size: 14px;
  font-weight: 500;
}

.error.active {
  display: block;
}

.result {
  display: none;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--color-tertiary);
}

.result.active {
  display: block;
}

.result-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  width: fit-content;
  padding: 3px 9px;
  border-radius: 999px;
  background: var(--color-neutral);
  color: var(--color-secondary);
  font-size: 11px;
  font-weight: 400;
  line-height: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge-success,
.chip-success {
  background: #e6f4ea;
  color: var(--color-success);
}

.badge-error,
.chip-error {
  background: #fee2e2;
  color: var(--color-error);
}

.data-grid,
.summary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.summary-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
  margin-bottom: 16px;
}

.data-item,
.dns-record,
.port-item {
  min-width: 0;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  padding: 12px 14px;
}

.data-item .label,
.port-status,
.port-service,
.table-label {
  color: var(--color-secondary);
  font-size: 11px;
  font-weight: 400;
  line-height: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.data-item .value,
.port-num {
  margin-top: 4px;
  color: var(--color-on-surface);
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
  word-break: break-word;
}

.mono,
code,
pre {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.dns-section {
  margin-top: 16px;
}

.dns-section h3,
.result-subtitle {
  margin: 0 0 8px;
  color: var(--color-secondary);
  font-size: 12px;
  font-weight: 500;
  line-height: 16px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.dns-records,
.port-results {
  display: grid;
  gap: 6px;
}

.dns-record {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  word-break: break-word;
}

.record-type {
  display: inline-flex;
  margin-right: 8px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--color-neutral);
  color: var(--color-secondary);
  font-family: var(--font-sans);
  font-size: 11px;
  font-weight: 500;
  line-height: 14px;
  letter-spacing: 0.04em;
}

.record-A,
.record-AAAA,
.record-CNAME,
.record-info {
  background: #e0e7ff;
  color: #4338ca;
}

.record-MX,
.record-SRV,
.port-item.open .port-status {
  color: var(--color-success);
}

.record-TXT,
.record-SOA,
.port-item.filtered .port-status {
  color: var(--color-warning);
}

.record-NS {
  color: var(--color-secondary);
}

.port-results {
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
}

.port-item {
  text-align: center;
}

.port-item.open {
  border-color: #a8d5ba;
  background: #f4fbf6;
}

.port-item.filtered {
  border-color: #fcd34d;
  background: #fffbeb;
}

.port-item.closed {
  opacity: 0.68;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th,
td {
  padding: 9px 12px;
  text-align: left;
  border-bottom: 1px solid var(--color-tertiary);
  vertical-align: top;
}

th {
  color: var(--color-secondary);
  background: var(--color-neutral);
  font-size: 11px;
  font-weight: 500;
  line-height: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

td {
  color: var(--color-on-surface);
  font-size: 13px;
  line-height: 19px;
}

tr:last-child td {
  border-bottom: 0;
}

.headers-table td:first-child {
  width: 32%;
  color: var(--color-on-surface);
  font-weight: 600;
  white-space: nowrap;
}

.site-footer {
  margin-top: 56px;
  padding: 28px 0 40px;
  border-top: 1px solid var(--color-tertiary);
  color: var(--color-secondary);
  font-size: 13px;
  font-weight: 500;
}

.footer-inner {
  display: grid;
  gap: 16px;
}

.legal-note {
  max-width: 760px;
  padding: 14px 16px;
  border: 1px solid #fcd34d;
  border-radius: 8px;
  background: #fffbeb;
  color: #7c4a03;
  font-size: 12px;
  line-height: 18px;
}

.toast {
  position: fixed;
  right: 20px;
  bottom: 20px;
  visibility: hidden;
  max-width: 360px;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
  color: var(--color-on-surface);
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
  z-index: 100;
}

.toast.show {
  visibility: visible;
  opacity: 1;
  transform: translateY(0);
}

.doc-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.doc-hero {
  padding: 48px 0 32px;
  display: grid;
  gap: 14px;
}

.toc {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 6px;
}

.toc-title {
  margin: 0 0 8px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.toc a,
.mobile-toc a {
  color: var(--color-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  line-height: 20px;
}

.toc a:hover,
.toc a.active,
.mobile-toc a:hover {
  color: var(--color-primary);
}

.mobile-toc {
  display: none;
  margin-bottom: 24px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: var(--color-surface);
}

.mobile-toc summary {
  cursor: pointer;
  padding: 12px 14px;
  font-size: 14px;
  font-weight: 500;
}

.mobile-toc div {
  display: grid;
  gap: 8px;
  padding: 0 14px 14px;
}

.doc-card {
  margin-bottom: 24px;
  scroll-margin-top: 96px;
}

.base-url-card {
  margin: 0 auto 16px;
  padding: 16px;
}

.base-url-label {
  display: block;
  margin-bottom: 2px;
  color: var(--color-muted);
  text-transform: uppercase;
}

.base-url-value {
  display: block;
  margin-bottom: 2px;
  color: var(--color-primary);
  font-size: 16px;
  line-height: 22px;
  word-break: break-all;
}

.base-url-note {
  color: var(--color-muted);
}

.doc-section-label {
  margin: 14px 0 6px;
  color: var(--color-muted);
  font-size: 12px;
  font-weight: 500;
  line-height: 16px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.endpoint-title h3 {
  margin: 0;
}

.result.active {
  animation: resultAppear 0.4s ease;
}

@keyframes resultAppear {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.copy-btn {
  display: inline-block;
  margin-left: 8px;
  padding: 2px 8px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: var(--color-surface);
  color: var(--color-muted);
  font-size: 11px;
  font-weight: 500;
  line-height: 14px;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.copy-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.copy-btn.copied {
  color: var(--color-success);
  border-color: #a8d5ba;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 16px;
  z-index: 200;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--color-primary);
  color: #ffffff;
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
}

.skip-link:focus {
  top: 12px;
}

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

.endpoint-title {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}

.endpoint-url {
  display: inline-block;
  max-width: 100%;
  margin-bottom: 14px;
  padding: 6px 10px;
  border: 1px solid var(--color-tertiary);
  border-radius: 4px;
  background: var(--color-neutral);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 16px;
  overflow-x: auto;
}

pre {
  max-width: 100%;
  margin: 10px 0 0;
  padding: 12px;
  overflow-x: auto;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  background: #18180f;
  color: #ffffff;
  font-size: 12px;
  line-height: 17px;
}

pre .string {
  color: #c7d2fe;
}

pre .key {
  color: #fef3c7;
}

pre .boolean,
pre .number,
pre .null {
  color: #bfdbfe;
}

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-neutral);
}

::-webkit-scrollbar-thumb {
  background: var(--color-tertiary);
  border-radius: 999px;
}

@media (max-width: 860px) {
  .page-shell {
    width: min(100% - 24px, 1024px);
  }

  .header-inner {
    min-height: 66px;
  }

  .hero,
  .doc-hero {
    padding-top: 36px;
  }

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

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

  .form-grid,
  .form-grid-3 {
    grid-template-columns: 1fr;
  }

  .button,
  .btn {
    width: 100%;
  }

  .tool-header {
    grid-template-columns: 1fr;
  }

  .data-grid,
  .summary-grid {
    grid-template-columns: 1fr;
  }

  .doc-layout {
    display: block;
  }

  .toc {
    display: none;
  }

  .mobile-toc {
    display: block;
  }
}

@media (max-width: 520px) {
  .header-inner {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .hero h1,
  .doc-hero h1 {
    font-size: 40px;
  }

  .tool-panel,
  .doc-card {
    padding: 18px;
  }
}

/* ================= NetUtils v2 additions ================= */

/* --- Theme engine: dark tokens (TODO 13) --- */
html[data-theme="dark"] {
  --color-neutral: #0F0F0E;
  --color-surface: #1A1A18;
  --color-on-surface: #F5F4F0;
  --color-secondary: #A8A69E;
  --color-tertiary: #2E2E2A;
  --color-border: #2E2E2A;
  --color-muted: #706F68;
  --color-error: #F87171;
  --color-warning: #FBBF24;
  --color-success: #34D399;
}

html[data-theme="dark"] .site-header { background: rgba(15, 15, 14, 0.94); }
html[data-theme="dark"] .tab.active { background: var(--color-on-surface); color: var(--color-neutral); }
html[data-theme="dark"] .tab:hover { background: var(--color-surface); }
html[data-theme="dark"] .record-A, html[data-theme="dark"] .record-AAAA, html[data-theme="dark"] .record-CNAME, html[data-theme="dark"] .record-info { background: #312e63; color: #c7d2fe; }
html[data-theme="dark"] .port-item.open { border-color: #14532d; background: #0d2218; }
html[data-theme="dark"] .port-item.filtered { border-color: #713f12; background: #241a06; }
html[data-theme="dark"] .notice-warning { background: #241a06; border-color: #713f12; color: #fbbf24; }
html[data-theme="dark"] .notice-error, html[data-theme="dark"] .error { background: #2b1210; border-color: #7f1d1d; color: #f87171; }
html[data-theme="dark"] .badge-success, html[data-theme="dark"] .chip-success { background: #0d2218; color: #34d399; }
html[data-theme="dark"] .badge-error, html[data-theme="dark"] .chip-error { background: #2b1210; color: #f87171; }
html[data-theme="dark"] .tag-get { background: #0d2218; color: #34d399; border-color: #14532d; }
html[data-theme="dark"] .tag-required { background: #2b1210; color: #f87171; border-color: #7f1d1d; }
html[data-theme="dark"] pre { background: #0F0F0E; border-color: #2E2E2A; }
html[data-theme="dark"] .legal-note { background: #241a06; border-color: #713f12; color: #fcd34d; }
html[data-theme="dark"] th { background: var(--color-neutral); }
html[data-theme="dark"] select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23A8A69E' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
}
html[data-theme="dark"] ::selection { background: #635bff; color: #fff; }
html[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #2E2E2A; }
html[data-theme="dark"] ::-webkit-scrollbar-track { background: #0F0F0E; }

/* --- header controls --- */
.header-actions { display: flex; align-items: center; gap: 8px; }
.icon-btn {
  height: 40px; min-width: 40px; display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: 1px solid var(--color-border); border-radius: 999px; background: var(--color-surface);
  color: var(--color-secondary); cursor: pointer; padding: 0 12px;
}
.icon-btn:hover { color: var(--color-primary); border-color: var(--color-primary); }
.kbd-hint { font-family: var(--font-mono); font-size: 10px; color: var(--color-muted); border: 1px solid var(--color-border); border-radius: 4px; padding: 1px 5px; }
.lang-select { width: auto; min-width: 74px; height: 40px; }

/* --- tabs: 9 tools --- */
.tabs { grid-template-columns: repeat(auto-fit, minmax(96px, 1fr)); }

/* --- recent strip (TODO 10) --- */
.recent-strip { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-top: 10px; min-height: 22px; }
.recent-title { color: var(--color-muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.04em; margin-right: 4px; }
.recent-chip { cursor: pointer; transition: border-color .2s, color .2s; }
.recent-chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.recent-clear { cursor: pointer; }
.recent-clear:hover { border-color: var(--color-error); color: var(--color-error); }

/* --- chips --- */
.chip-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 12px; }
.chip-good { background: #e6f4ea; color: var(--color-success); border-color: #a8d5ba; }
.chip-error { background: #fee2e2; color: var(--color-error); border-color: #fca5a5; }
.chip-wild { background: #fef3c7; color: var(--color-warning); border-color: #fcd34d; }
html[data-theme="dark"] .chip-good { background: #0d2218; color: #34d399; border-color: #14532d; }
html[data-theme="dark"] .chip-error { background: #2b1210; color: #f87171; border-color: #7f1d1d; }
html[data-theme="dark"] .chip-wild { background: #241a06; color: #fbbf24; border-color: #713f12; }
.ttl { color: var(--color-muted); font-size: 11px; }
.empty { color: var(--color-text-secondary, var(--color-secondary)); padding: 16px; text-align: center; }

/* --- score badges (TODO 07/headers) --- */
.score-badge {
  display: inline-flex; align-items: center; padding: 4px 12px; border-radius: 999px;
  font-size: 12px; font-weight: 600; letter-spacing: 0.03em;
}
.score-good { background: #e6f4ea; color: var(--color-success); border: 1px solid #a8d5ba; }
.score-mid { background: #fef3c7; color: var(--color-warning); border: 1px solid #fcd34d; }
.score-bad { background: #fee2e2; color: var(--color-error); border: 1px solid #fca5a5; }
html[data-theme="dark"] .score-good { background: #0d2218; border-color: #14532d; }
html[data-theme="dark"] .score-mid { background: #241a06; border-color: #713f12; }
html[data-theme="dark"] .score-bad { background: #2b1210; border-color: #7f1d1d; }

/* --- progress (SSE) --- */
.progress-wrap { display: flex; align-items: center; gap: 12px; margin-top: 16px; }
.progress-track { flex: 1; height: 8px; border-radius: 999px; background: var(--color-tertiary); overflow: hidden; }
.progress-fill { height: 100%; width: 0%; border-radius: 999px; background: var(--color-primary); transition: width 0.3s ease; }
.progress-label { color: var(--color-secondary); font-size: 12px; font-family: var(--font-mono); white-space: nowrap; }

/* --- diff list (TODO 05) --- */
.diff-list { display: grid; gap: 6px; margin: 8px 0; }
.diff-row { display: flex; align-items: center; gap: 8px; padding: 8px 12px; border: 1px solid var(--color-border); border-radius: 8px; font-size: 13px; flex-wrap: wrap; }
.diff-missing { color: var(--color-error); font-size: 11px; margin-left: auto; }

/* --- chain viewer (TODO 07) --- */
.chain-view { display: grid; gap: 6px; margin-bottom: 12px; }
.chain-item { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border: 1px solid var(--color-border); border-radius: 8px; }
.chain-depth { color: var(--color-muted); font-family: var(--font-mono); font-size: 12px; }
.chain-body { flex: 1; min-width: 0; }
.chain-verified { color: var(--color-success); font-size: 13px; }
.chain-ca { background: var(--color-neutral); }

/* --- CT list --- */
.ct-list { display: grid; gap: 4px; max-height: 420px; overflow-y: auto; }
.ct-row { display: grid; grid-template-columns: minmax(0, 2fr) auto minmax(0, 1.2fr) 90px; gap: 10px; align-items: center; padding: 7px 12px; border: 1px solid var(--color-border); border-radius: 6px; cursor: pointer; font-size: 13px; }
.ct-row:hover { border-color: var(--color-primary); }
.ct-row .label { color: var(--color-muted); font-size: 11px; }

/* --- result actions (share/AI) --- */
.result-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.result-actions .button { height: 34px; padding: 6px 14px; font-size: 13px; }
.ai-panel { margin: 12px 0; border: 1px solid var(--color-border); border-radius: 10px; overflow: hidden; }
.ai-panel-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 10px 14px; background: var(--color-neutral); border-bottom: 1px solid var(--color-border); }
.ai-panel-head strong { font-size: 13px; }
.ai-content { padding: 14px; font-size: 14px; line-height: 1.6; max-height: 320px; overflow-y: auto; }
.ai-content h4 { margin: 8px 0 4px; }
.ai-content code { background: var(--color-neutral); padding: 1px 5px; border-radius: 4px; font-size: 12px; }
.ai-cursor { animation: blink 1s infinite; color: var(--color-primary); }
@keyframes blink { 50% { opacity: 0; } }
.md-li { display: block; padding-left: 4px; }

/* --- port banner --- */
.port-banner { font-size: 10px; color: var(--color-muted); margin-top: 3px; word-break: break-all; }

/* --- batch form --- */
.batch-form { grid-template-columns: 1fr; align-items: start; }
.form-field-wide { grid-column: 1 / -1; }
.input-textarea {
  width: 100%; min-height: 120px; border: 1px solid var(--color-border); border-radius: 8px;
  background: var(--color-surface); color: var(--color-on-surface); padding: 10px 12px;
  font-size: 14px; font-family: var(--font-mono); line-height: 1.5; resize: vertical;
}
.input-textarea:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(99, 91, 255, 0.1); outline: none; }
.form-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.batch-table-wrap { max-height: 420px; overflow-y: auto; }
.batch-table-wrap td:first-child { width: 55%; }

/* --- map (TODO 15) --- */
.map-wrap { position: relative; margin-top: 14px; border: 1px solid var(--color-border); border-radius: 10px; overflow: hidden; background: #eef2f6; }
#map-canvas { display: block; width: 100%; height: 420px; cursor: grab; }
#map-canvas:active { cursor: grabbing; }
.map-tooltip { position: absolute; left: 12px; bottom: 12px; padding: 6px 12px; border-radius: 6px; background: rgba(15,15,14,0.85); color: #fff; font-size: 12px; font-family: var(--font-mono); pointer-events: none; opacity: 0; transition: opacity .2s; }
.map-wrap:hover .map-tooltip { opacity: 1; }

/* --- modals (palette/share) --- */
.modal { position: fixed; inset: 0; z-index: 90; display: none; align-items: flex-start; justify-content: center; background: rgba(0, 0, 0, 0.45); padding: 12vh 16px 16px; }
.modal.open { display: flex; }
.modal-card { width: min(100%, 560px); background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 14px; padding: 16px; box-shadow: 0 24px 60px rgba(0,0,0,0.25); }
.modal-card h3 { margin: 0 0 6px; }
.modal-note { color: var(--color-secondary); font-size: 13px; margin: 0 0 12px; }
.modal-card .form-actions { margin-top: 12px; }
.palette-input { width: 100%; margin-bottom: 8px; }
.palette-list { display: grid; gap: 2px; max-height: 340px; overflow-y: auto; }
.palette-item { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 10px 12px; border: 1px solid transparent; border-radius: 8px; background: transparent; color: var(--color-on-surface); cursor: pointer; text-align: left; font-size: 14px; width: 100%; }
.palette-item.selected { background: var(--color-primary); color: #fff; }
.palette-hint { color: var(--color-muted); font-size: 11px; }
.palette-item.selected .palette-hint { color: rgba(255,255,255,0.8); }
.palette-empty { padding: 20px; text-align: center; color: var(--color-muted); }
.palette-hint-bar { margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--color-border); color: var(--color-muted); font-size: 11px; }

/* --- footer --- */
.footer-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.footer-controls { display: flex; gap: 8px; }
.footer-controls .chip { cursor: pointer; }
.footer-controls .chip.active { border-color: var(--color-success); color: var(--color-success); }

/* --- misc --- */
.result-subsection { margin-top: 10px; }
#ssl-gauge { width: 120px; height: 120px; }
.form-grid-3 { grid-template-columns: minmax(0, 2fr) minmax(140px, 1fr) auto; }

@media (max-width: 860px) {
  .header-actions { flex-wrap: wrap; }
  .ct-row { grid-template-columns: 1fr; gap: 2px; }
  .tabs { grid-template-columns: 1fr; }
}