:root {
  color-scheme: light dark;
  --tt-bg: oklch(97% 0.012 292);
  --tt-surface: oklch(99% 0.006 292);
  --tt-surface-raised: oklch(94.5% 0.022 292);
  --tt-ink: oklch(22% 0.045 282);
  --tt-muted: oklch(47% 0.035 282);
  --tt-line: oklch(88% 0.025 292);
  --tt-line-strong: oklch(78% 0.045 292);
  --tt-accent: oklch(50% 0.19 292);
  --tt-accent-strong: oklch(42% 0.2 292);
  --tt-accent-soft: oklch(92% 0.045 292);
  --tt-danger: oklch(49% 0.17 28);
  --tt-danger-soft: oklch(93% 0.035 28);
  --tt-success: oklch(43% 0.11 151);
  --tt-success-soft: oklch(93% 0.034 151);
  --tt-warning: oklch(50% 0.105 80);
  --tt-radius-sm: 10px;
  --tt-radius: 12px;
  --tt-radius-lg: 16px;
  --tt-space-1: 0.25rem;
  --tt-space-2: 0.5rem;
  --tt-space-3: 0.75rem;
  --tt-space-4: 1rem;
  --tt-space-5: 1.5rem;
  --tt-space-6: 2rem;
  --tt-space-7: 3rem;
  --tt-space-8: 4rem;
  --tt-space-9: 6rem;
  --tt-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", "Malgun Gothic", sans-serif;
  --tt-content: 74rem;
  --tt-reading: 45rem;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --tt-bg: oklch(16% 0.035 282);
    --tt-surface: oklch(21% 0.04 282);
    --tt-surface-raised: oklch(26% 0.045 282);
    --tt-ink: oklch(94% 0.018 292);
    --tt-muted: oklch(74% 0.035 292);
    --tt-line: oklch(33% 0.05 282);
    --tt-line-strong: oklch(43% 0.065 282);
    --tt-accent: oklch(72% 0.14 292);
    --tt-accent-strong: oklch(80% 0.11 292);
    --tt-accent-soft: oklch(29% 0.075 292);
    --tt-danger: oklch(72% 0.13 28);
    --tt-danger-soft: oklch(25% 0.055 28);
    --tt-success: oklch(71% 0.11 151);
    --tt-success-soft: oklch(25% 0.045 151);
    --tt-warning: oklch(75% 0.1 80);
  }
}

:root[data-theme="dark"] {
  --tt-bg: oklch(16% 0.035 282);
  --tt-surface: oklch(21% 0.04 282);
  --tt-surface-raised: oklch(26% 0.045 282);
  --tt-ink: oklch(94% 0.018 292);
  --tt-muted: oklch(74% 0.035 292);
  --tt-line: oklch(33% 0.05 282);
  --tt-line-strong: oklch(43% 0.065 282);
  --tt-accent: oklch(72% 0.14 292);
  --tt-accent-strong: oklch(80% 0.11 292);
  --tt-accent-soft: oklch(29% 0.075 292);
  --tt-danger: oklch(72% 0.13 28);
  --tt-danger-soft: oklch(25% 0.055 28);
  --tt-success: oklch(71% 0.11 151);
  --tt-success-soft: oklch(25% 0.045 151);
  --tt-warning: oklch(75% 0.1 80);
}

:root[data-theme="light"] {
  color-scheme: light;
}

:root[data-theme="dark"] {
  color-scheme: dark;
}

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

html {
  min-width: 20rem;
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  min-height: 100vh;
  margin: 0;
  padding-inline: env(safe-area-inset-left) env(safe-area-inset-right);
  background: var(--tt-bg);
  color: var(--tt-ink);
  font-family: var(--tt-font);
  font-size: 1rem;
  font-kerning: normal;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
}

[hidden] {
  display: none !important;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  cursor: pointer;
}

a {
  color: inherit;
  text-underline-offset: 0.18em;
}

p,
h1,
h2,
h3,
dl,
dd {
  margin-block-start: 0;
}

h1,
h2,
h3 {
  line-height: 1.12;
  text-wrap: balance;
  word-break: keep-all;
  overflow-wrap: anywhere;
}

h1 {
  margin-block-end: var(--tt-space-4);
  font-size: clamp(2.5rem, 7vw, 4rem);
  font-weight: 760;
  letter-spacing: -0.045em;
}

h2 {
  margin-block-end: var(--tt-space-4);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  font-weight: 720;
  letter-spacing: -0.03em;
}

h3 {
  margin-block-end: var(--tt-space-3);
  font-size: 1.05rem;
  font-weight: 690;
}

:focus-visible {
  outline: 2px solid var(--tt-accent);
  outline-offset: 3px;
}

::selection {
  background: var(--tt-accent-soft);
  color: var(--tt-ink);
}

.sr-only,
.skip-link:not(:focus) {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link:focus {
  position: fixed;
  z-index: 600;
  inset-block-start: var(--tt-space-3);
  inset-inline-start: var(--tt-space-3);
  border: 1px solid var(--tt-line-strong);
  border-radius: var(--tt-radius);
  background: var(--tt-surface);
  color: var(--tt-ink);
  padding: var(--tt-space-3) var(--tt-space-4);
  box-shadow: 0 12px 32px oklch(10% 0.01 178 / 0.18);
}

.section-shell,
.route-shell,
.content-shell,
.nav-shell,
.site-footer {
  width: min(var(--tt-content), calc(100% - 2rem));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  z-index: 200;
  inset-block-start: 0;
  border-block-end: 1px solid var(--tt-line);
  background: var(--tt-surface);
}

.nav-shell {
  min-height: 4.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--tt-space-4);
}

.brand {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  gap: var(--tt-space-2);
  color: var(--tt-ink);
  font-size: 1.05rem;
  font-weight: 720;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.brand-mark {
  width: 2rem;
  height: 2rem;
  flex: 0 0 2rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--tt-space-1);
}

.nav-links > a,
.language-picker select,
.theme-toggle,
.site-footer nav a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: var(--tt-radius);
  background: transparent;
  color: var(--tt-muted);
  padding-inline: var(--tt-space-3);
  font-size: 0.92rem;
  font-weight: 610;
  text-decoration: none;
}

.language-picker select {
  max-width: 10rem;
  border-color: var(--tt-line);
  appearance: auto;
}

.nav-links > a[aria-current="page"] {
  background: var(--tt-accent-soft);
  color: var(--tt-ink);
}

.theme-toggle {
  gap: var(--tt-space-2);
  border-color: var(--tt-line);
  color: var(--tt-ink);
}

.theme-toggle span:first-child {
  color: var(--tt-accent);
  font-size: 1rem;
}

@media (hover: hover) {
  .nav-links > a:hover,
  .theme-toggle:hover,
  .site-footer nav a:hover {
    background: var(--tt-surface-raised);
    color: var(--tt-ink);
  }
}

.workbench-hero {
  max-width: 54rem;
  padding-block: clamp(3.5rem, 5vw, 4.5rem) var(--tt-space-5);
  text-align: center;
}

.workbench-hero h1 {
  max-width: 12ch;
  margin-inline: auto;
}

.section-index {
  margin-block-end: var(--tt-space-4);
  color: var(--tt-accent);
  font-size: 0.76rem;
  font-weight: 690;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-copy,
.page-intro > p:not(.section-index),
.tool-intro > div > p,
.content-lede {
  max-width: 42rem;
  color: var(--tt-muted);
  font-size: 1.08rem;
}

.workbench-hero .hero-copy {
  margin-inline: auto;
}

.tool-search {
  width: min(48rem, 100%);
  min-height: 3.5rem;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--tt-space-3);
  margin: var(--tt-space-7) auto 0;
  border: 1px solid var(--tt-line-strong);
  border-radius: var(--tt-radius-lg);
  background: var(--tt-surface);
  padding: var(--tt-space-1);
  padding-inline-start: var(--tt-space-4);
}

.tool-search > span {
  color: var(--tt-muted);
  font-size: 1.35rem;
}

.tool-search input {
  min-width: 0;
  min-height: 2.75rem;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--tt-ink);
  font-size: 1rem;
}

.tool-search input::placeholder {
  color: var(--tt-muted);
  opacity: 1;
}

.tool-search:focus-within {
  border-color: var(--tt-accent);
  outline: 2px solid color-mix(in oklch, var(--tt-accent) 24%, transparent);
  outline-offset: 2px;
}

.tool-search button,
.artifact-error a {
  min-height: 2.75rem;
  border: 1px solid var(--tt-accent);
  border-radius: var(--tt-radius);
  background: var(--tt-accent);
  color: var(--tt-bg);
  padding-inline: var(--tt-space-4);
  font-weight: 680;
}

@media (hover: hover) {
  .tool-search button:hover {
    border-color: var(--tt-accent-strong);
    background: var(--tt-accent-strong);
  }
}

.search-status {
  min-height: 1.5rem;
  margin-block: var(--tt-space-2) 0;
  color: var(--tt-muted);
  font-size: 0.84rem;
  text-align: center;
}

.frequent-tools {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--tt-space-2);
  margin-block-start: var(--tt-space-5);
  font-size: 0.9rem;
}

.frequent-tools > span {
  color: var(--tt-muted);
}

.frequent-tools a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--tt-line);
  border-radius: 999px;
  background: var(--tt-surface);
  color: var(--tt-ink);
  padding-inline: var(--tt-space-3);
  font-weight: 620;
  text-decoration: none;
}

.frequent-tools a::after {
  content: "↗";
  margin-inline-start: var(--tt-space-1);
  color: var(--tt-accent);
}

.trust-strip {
  padding-block: var(--tt-space-5);
  border-block: 1px solid var(--tt-line);
  text-align: center;
}

.trust-strip h2 {
  font-size: clamp(1.4rem, 3vw, 1.8rem);
}

.trust-strip__items {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--tt-space-7);
  margin-block-start: var(--tt-space-6);
}

.trust-strip article {
  min-width: 0;
}

.trust-strip strong,
.trust-strip span {
  display: block;
}

.trust-strip strong {
  margin-block-end: var(--tt-space-2);
  font-size: 1.05rem;
}

.trust-strip span {
  color: var(--tt-muted);
  font-size: 0.92rem;
}

.catalog {
  padding-block: var(--tt-space-5) var(--tt-space-9);
}

.section-shell--tight {
  padding-block-start: 0;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(16rem, 25rem);
  align-items: end;
  gap: var(--tt-space-7);
  margin-block-end: var(--tt-space-5);
}

.section-heading > p {
  margin: 0;
  color: var(--tt-muted);
}

.tool-group {
  display: block;
  border-block-start: 1px solid var(--tt-line-strong);
}

.tool-group + .tool-group {
  margin-block-start: var(--tt-space-8);
}

.tool-group > header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tt-space-3);
  padding-block: var(--tt-space-4);
}

.tool-group > header h3,
.tool-group > header h2,
.tool-group > header span {
  margin: 0;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.tool-group > header span {
  color: var(--tt-muted);
}

.tool-table-stack {
  min-width: 0;
}

.tool-table {
  width: 100%;
  border-collapse: collapse;
  table-layout: fixed;
}

.tool-table__name {
  width: 31%;
}

.tool-table__processing {
  width: 11.5rem;
}

.tool-table th,
.tool-table td {
  text-align: left;
}

.tool-table thead th {
  height: 2.75rem;
  border-block-end: 1px solid var(--tt-line-strong);
  color: var(--tt-muted);
  padding: 0 var(--tt-space-4);
  font-size: 0.72rem;
  font-weight: 620;
  letter-spacing: 0.045em;
}

.tool-row {
  position: relative;
  border-block-end: 1px solid var(--tt-line);
  color: var(--tt-ink);
  transition: background-color 140ms ease-out;
}

.tool-row > th,
.tool-row > td {
  height: 5.5rem;
  padding: var(--tt-space-3) var(--tt-space-4);
  vertical-align: middle;
}

.tool-identity {
  font-weight: inherit;
}

.tool-link {
  min-width: 0;
  min-height: 2.75rem;
  display: grid;
  grid-template-columns: 1.75rem minmax(0, 1fr) 1rem;
  align-items: center;
  gap: var(--tt-space-3);
  color: var(--tt-ink);
  text-decoration: none;
}

.tool-link::after {
  content: "";
  position: absolute;
  z-index: 1;
  inset: 0;
}

.tool-link:focus-visible {
  outline: 0;
}

.tool-row:focus-within {
  outline: 2px solid var(--tt-accent);
  outline-offset: -2px;
}

.tool-icon,
.tool-link strong,
.tool-link-arrow,
.tool-description,
.tool-processing {
  position: relative;
  z-index: 2;
  pointer-events: none;
}

.tool-icon {
  width: 1.5rem;
  height: 1.5rem;
  display: inline-grid;
  place-items: center;
  color: var(--tt-muted);
}

.tool-icon svg {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.tool-icon svg * {
  vector-effect: non-scaling-stroke;
}

.tool-link strong {
  min-width: 0;
  font-size: 1.08rem;
  font-weight: 690;
  letter-spacing: -0.015em;
  overflow-wrap: anywhere;
}

.tool-description {
  color: var(--tt-muted);
  font-size: 0.92rem;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.tool-processing {
  white-space: nowrap;
}

.tool-link-arrow {
  font-size: 1rem;
  transition: transform 140ms ease-out;
}

@media (hover: hover) {
  .tool-row:hover {
    background: var(--tt-surface-raised);
  }

  .tool-row:hover .tool-icon,
  .tool-row:hover .tool-link-arrow {
    color: var(--tt-accent);
  }

  .tool-row:hover .tool-link-arrow {
    transform: translate(2px, -2px);
  }
}

.processing-badge {
  min-height: 1.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: flex-start;
  gap: 0.45rem;
  border: 1px solid var(--tt-line);
  border-radius: var(--tt-radius-sm);
  background: var(--tt-surface);
  color: var(--tt-muted);
  padding-inline: 0.55rem;
  font-size: 0.75rem;
  font-weight: 620;
  white-space: nowrap;
}

.processing-badge > span {
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--tt-accent);
}

.processing-badge[data-mode="remote"] > span {
  background: var(--tt-warning);
}

.processing-badge[data-mode="p2p"] > span,
.processing-badge[data-mode="realtime"] > span {
  background: var(--tt-success);
}

.search-empty {
  border-block: 1px solid var(--tt-line);
  padding-block: var(--tt-space-7);
}

.search-empty strong,
.search-empty span {
  display: block;
}

.search-empty span {
  margin-block-start: var(--tt-space-2);
  color: var(--tt-muted);
}

.processing-legend {
  display: grid;
  grid-template-columns: 12rem minmax(0, 1fr);
  gap: var(--tt-space-6);
  margin-block-start: var(--tt-space-9);
  border-block-start: 1px solid var(--tt-line-strong);
  padding-block-start: var(--tt-space-5);
}

.processing-legend h3 {
  font-size: 0.9rem;
}

.processing-legend dl {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--tt-space-5) var(--tt-space-7);
}

.processing-legend dt {
  margin-block-end: var(--tt-space-1);
  font-size: 0.86rem;
  font-weight: 670;
}

.processing-legend dd {
  color: var(--tt-muted);
  font-size: 0.84rem;
}

.tool-card-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.tool-card {
  min-width: 0;
  border: 1px solid var(--tt-line);
  border-radius: var(--tt-radius-lg);
  background: var(--tt-surface);
  box-shadow: 0 10px 28px oklch(25% 0.055 282 / 0.07);
  transition: border-color 160ms ease-out, transform 160ms ease-out;
}

.tool-card__link {
  min-height: 10rem;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto 1fr;
  grid-template-areas:
    "icon arrow"
    "copy copy";
  gap: 1rem;
  padding: 1.25rem;
  color: var(--tt-ink);
  text-decoration: none;
}

.tool-card__icon {
  grid-area: icon;
  width: 2.5rem;
  height: 2.5rem;
  display: grid;
  place-items: center;
  border-radius: var(--tt-radius-sm);
  background: var(--tt-accent-soft);
  color: var(--tt-accent);
}

.tool-card__icon .tool-icon {
  width: 1.35rem;
  height: 1.35rem;
  color: inherit;
}

.tool-card__copy {
  grid-area: copy;
  min-width: 0;
  align-self: start;
}

.tool-card__copy strong,
.tool-card__copy span {
  display: block;
  overflow-wrap: anywhere;
}

.tool-card__copy strong {
  margin-block-end: var(--tt-space-2);
  font-size: 1.05rem;
  line-height: 1.25;
}

.tool-card__copy span {
  color: var(--tt-muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.tool-card__arrow {
  grid-area: arrow;
  color: var(--tt-muted);
  transition: color 160ms ease-out, transform 160ms ease-out;
}

.tool-card__link:focus-visible {
  outline: 3px solid var(--tt-accent);
  outline-offset: 3px;
  border-radius: var(--tt-radius-lg);
}

@media (hover: hover) {
  .tool-card:hover {
    border-color: var(--tt-line-strong);
    transform: translateY(-2px);
  }

  .tool-card:hover .tool-card__arrow {
    color: var(--tt-accent);
    transform: translate(2px, -2px);
  }
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tool-card {
    box-shadow: none;
  }
}

:root[data-theme="dark"] .tool-card {
  box-shadow: none;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tool-stage,
  :root:not([data-theme="light"]) .content-panel {
    box-shadow: none;
  }
}

:root[data-theme="dark"] .tool-stage,
:root[data-theme="dark"] .content-panel {
  box-shadow: none;
}

.category-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--tt-space-2);
  margin-block-start: var(--tt-space-5);
}

.category-filters button {
  min-height: 2.75rem;
  border: 1px solid var(--tt-line);
  border-radius: 999px;
  background: var(--tt-surface);
  color: var(--tt-muted);
  padding-inline: var(--tt-space-4);
  font-weight: 640;
}

.category-filters button[aria-pressed="true"] {
  border-color: var(--tt-accent);
  background: var(--tt-accent);
  color: var(--tt-bg);
}

@media (hover: hover) {
  .category-filters button:hover {
    border-color: var(--tt-accent);
    color: var(--tt-ink);
  }
}

.page-intro {
  max-width: 54rem;
  padding-block: var(--tt-space-8) var(--tt-space-6);
  text-align: center;
}

.page-intro h1 {
  font-size: clamp(2.4rem, 5vw, 3.4rem);
}

.page-intro > p:not(.section-index) {
  margin-inline: auto;
}

.how-it-works,
.general-faq {
  width: min(var(--tt-content), calc(100% - 2rem));
  margin-inline: auto;
}

.how-it-works {
  padding-block: var(--tt-space-9);
  border-block-start: 1px solid var(--tt-line);
}

.how-it-works h2,
.general-faq h2 {
  text-align: center;
}

.how-it-works ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--tt-space-7);
  margin: var(--tt-space-7) 0 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.how-it-works li {
  min-width: 0;
  counter-increment: steps;
}

.how-it-works strong,
.how-it-works span {
  display: block;
}

.how-it-works strong::before {
  content: counter(steps, decimal-leading-zero) "  ";
  color: var(--tt-accent);
  font-variant-numeric: tabular-nums;
}

.how-it-works span {
  margin-block-start: var(--tt-space-2);
  color: var(--tt-muted);
  font-size: 0.92rem;
}

.general-faq {
  max-width: 48rem;
  padding-block-end: var(--tt-space-9);
}

.general-faq h2 {
  margin-block-end: var(--tt-space-6);
}

.general-faq details {
  border: 1px solid var(--tt-line);
  border-radius: var(--tt-radius);
  background: var(--tt-surface);
}

.general-faq details + details {
  margin-block-start: var(--tt-space-2);
}

.general-faq summary {
  min-height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tt-space-3);
  cursor: pointer;
  padding: var(--tt-space-3) var(--tt-space-4);
  font-weight: 660;
}

.general-faq summary::after {
  content: "+";
  color: var(--tt-accent);
  font-size: 1.2rem;
}

.general-faq details[open] {
  background: var(--tt-surface-raised);
}

.general-faq details[open] summary::after {
  content: "−";
}

.general-faq p {
  margin: 0;
  padding: 0 var(--tt-space-4) var(--tt-space-4);
  color: var(--tt-muted);
}

.route-shell {
  padding-block-end: var(--tt-space-9);
}

.route-shell.route-shell--console {
  width: 100%;
  min-height: 100svh;
  display: flow-root;
  padding: 0;
  background: #ebebeb;
}

.breadcrumb {
  min-height: 3.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--tt-space-2);
  color: var(--tt-muted);
  font-size: 0.82rem;
}

.breadcrumb a {
  min-width: 2.75rem;
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.tool-intro {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: end;
  gap: var(--tt-space-8);
  padding-block: var(--tt-space-7) var(--tt-space-8);
  border-block-end: 1px solid var(--tt-line-strong);
}

.tool-intro h1 {
  max-width: 18ch;
  font-size: clamp(2.25rem, 5vw, 3.5rem);
}

.tool-intro .tool-disclosure {
  margin-block-start: var(--tt-space-3);
  color: var(--tt-muted);
  font-size: 0.9rem;
}

.route-shell[data-tool-page="direct-file-transfer"] .tool-intro {
  padding-block: 1rem 1.5rem;
  border: 0;
}

.route-shell[data-tool-page="direct-file-transfer"] .tool-intro h1 {
  max-width: none;
  margin-block-end: 0.75rem;
  font-size: clamp(1.8rem, 4vw, 2.75rem);
}

.route-shell[data-tool-page="direct-file-transfer"] .tool-intro .section-index {
  display: none;
}

.route-shell[data-tool-page="direct-file-transfer"] .tool-intro > div > p {
  margin-block-end: 0;
  font-size: 0.95rem;
}

.route-shell[data-tool-page="direct-file-transfer"] .tool-layout {
  padding-block-start: 0;
}

.route-shell[data-tool-page="direct-file-transfer"] .tool-stage {
  padding: 0;
  box-shadow: none;
  background: transparent;
}

.route-shell[data-tool-page="direct-file-transfer"] .tool-support-grid {
  margin-block-start: 2.5rem;
}

.tool-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
  gap: clamp(2.5rem, 6vw, 5rem);
  padding-block-start: var(--tt-space-8);
}

.tool-layout--with-rail {
  grid-template-columns: minmax(0, 1fr) 15rem;
}

.tool-main,
.tool-stage,
.artifact-host {
  min-width: 0;
}

.tool-stage {
  border-radius: var(--tt-radius-lg);
  background: var(--tt-surface);
  padding: 1.25rem;
  box-shadow: 0 14px 36px oklch(25% 0.055 282 / 0.08);
}

.artifact-host {
  container-type: inline-size;
}

.artifact-error {
  border: 1px solid var(--tt-danger);
  border-radius: var(--tt-radius);
  background: var(--tt-danger-soft);
  padding: var(--tt-space-4);
}

.tool-support-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--tt-space-8);
  margin-block-start: var(--tt-space-9);
}

.tool-support-grid > .tool-help,
.tool-support-grid > .related-tools {
  min-width: 0;
  margin: 0;
  border-block-start: 1px solid var(--tt-line-strong);
  padding-block-start: var(--tt-space-6);
}

.tool-support-grid > .tt-ad {
  grid-column: 1 / -1;
}

.tool-help {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--tt-space-7);
}

.tool-help h2,
.related-tools h2 {
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.notes ul,
.notes ol {
  display: grid;
  gap: var(--tt-space-3);
  margin: 0;
  padding-inline-start: 1.15rem;
  color: var(--tt-muted);
  font-size: 0.92rem;
}

.notes li::marker {
  color: var(--tt-accent);
}

.tool-faq details {
  border-block-end: 1px solid var(--tt-line);
}

.tool-faq summary {
  min-height: 3.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tt-space-3);
  cursor: pointer;
  font-size: 0.92rem;
  font-weight: 650;
}

.tool-faq summary::after {
  content: "+";
  color: var(--tt-accent);
}

.tool-faq details[open] summary::after {
  content: "−";
}

.tool-faq p {
  margin-block-end: var(--tt-space-4);
  color: var(--tt-muted);
  font-size: 0.9rem;
}

.related-tools {
  margin-block-start: var(--tt-space-9);
}

.related-tools > div {
  border-block-start: 1px solid var(--tt-line-strong);
}

.related-tools a {
  min-height: 3.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tt-space-4);
  border-block-end: 1px solid var(--tt-line);
  text-decoration: none;
}

.related-tools a span:last-child {
  color: var(--tt-accent);
}

.tool-rail {
  position: sticky;
  inset-block-start: 6rem;
}

.tt-ad {
  width: min(48rem, calc(100% - 2rem));
  min-height: 7.5rem;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: var(--tt-space-2);
  margin: var(--tt-space-8) auto;
  color: var(--tt-muted);
  font-size: 0.7rem;
  text-align: center;
}

.tt-ad > span {
  letter-spacing: 0.05em;
}

.tt-ad .adsbygoogle {
  min-height: 6rem;
  display: block;
}

.tt-ad--rail {
  width: 100%;
  min-height: 18rem;
  margin: 0;
}

.tt-ad--rail .adsbygoogle {
  min-height: 16rem;
}

.tt-ad--placeholder {
  place-items: center;
  border: 1px dashed var(--tt-line-strong);
  border-radius: var(--tt-radius);
  background: var(--tt-surface-raised);
}

.tt-ad--placeholder > span {
  align-self: center;
}

.content-shell {
  padding-block: var(--tt-space-9);
}

.content-panel--guide {
  margin-inline: auto;
  width: 100%;
}

.content-panel--guide h1 {
  max-width: 100%;
  overflow-wrap: anywhere;
}

.content-panel--guide pre {
  overflow-x: auto;
  padding: 1rem;
  background: var(--tt-bg);
  border: 1px solid var(--tt-line);
  border-radius: var(--tt-radius);
}

.content-panel--guide li {
  margin-block: .5rem;
}

.language-notice {
  width: min(var(--tt-content), calc(100% - 2rem));
  margin: 0 auto;
  padding-block-end: .5rem;
  color: var(--tt-muted);
  font-size: .75rem;
  text-align: end;
}

.content-panel {
  max-width: var(--tt-reading);
  border: 1px solid var(--tt-line);
  border-radius: var(--tt-radius-lg);
  background: var(--tt-surface);
  padding: clamp(1.25rem, 4vw, 3rem);
  box-shadow: 0 14px 36px oklch(25% 0.055 282 / 0.08);
}

.content-panel--about {
  width: 100%;
  max-width: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  align-items: start;
  gap: var(--tt-space-8);
}

.content-panel.content-panel--about > section {
  margin-block-start: 0;
}

.about-intro {
  max-width: 34rem;
}

.content-shell h1 {
  max-width: 13ch;
}

.content-shell section {
  margin-block-start: var(--tt-space-8);
  border-block-start: 1px solid var(--tt-line);
  padding-block-start: var(--tt-space-5);
}

.content-shell section h2 {
  font-size: 1.25rem;
}

.content-shell section p {
  color: var(--tt-muted);
}

.principle-list {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: principles;
}

.principle-list li {
  display: grid;
  grid-template-columns: 2.25rem minmax(0, 1fr);
  gap: var(--tt-space-1) var(--tt-space-4);
  border-block-end: 1px solid var(--tt-line);
  padding-block: var(--tt-space-4);
  counter-increment: principles;
}

.principle-list li::before {
  grid-row: span 2;
  content: counter(principles, decimal-leading-zero);
  color: var(--tt-accent);
  font-size: 0.8rem;
  font-variant-numeric: tabular-nums;
}

.principle-list span {
  color: var(--tt-muted);
}

.contact-lines {
  display: grid;
  gap: 0;
}

.contact-lines > div {
  min-height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tt-space-4);
  border-block-end: 1px solid var(--tt-line);
}

.contact-lines span {
  color: var(--tt-muted);
}

.live-shell {
  width: min(96rem, calc(100% - 2rem));
  margin-inline: auto;
  padding-block: var(--tt-space-4) max(var(--tt-space-4), env(safe-area-inset-bottom));
}

.live-context {
  min-height: 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--tt-space-4);
  color: var(--tt-muted);
  font-size: 0.84rem;
}

.live-context a {
  min-height: 2.75rem;
  display: inline-flex;
  align-items: center;
}

.artifact-host--live {
  min-height: calc(100vh - 8rem);
  min-height: calc(100dvh - 8rem);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: var(--tt-space-8);
  border-block-start: 1px solid var(--tt-line-strong);
  padding-block: var(--tt-space-7) max(var(--tt-space-7), env(safe-area-inset-bottom));
}

.site-footer p {
  margin: var(--tt-space-2) 0 0;
  color: var(--tt-muted);
  font-size: 0.86rem;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: var(--tt-space-1);
}

@media (max-width: 64rem) {
  .tool-card-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .tool-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .tool-rail {
    display: none;
  }
}

@media (max-width: 48rem) {
  h1 {
    font-size: clamp(2.3rem, 12vw, 3.2rem);
  }

  .section-shell,
  .route-shell,
  .content-shell,
  .nav-shell,
  .site-footer,
  .live-shell {
    width: min(100% - 1.25rem, var(--tt-content));
  }

  .workbench-hero {
    padding-block-start: var(--tt-space-6);
  }

  .page-intro {
    padding-block: var(--tt-space-6) var(--tt-space-5);
  }

  .tool-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .trust-strip__items,
  .how-it-works ol {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--tt-space-5);
  }

  .how-it-works li {
    text-align: center;
  }

  .section-heading,
  .tool-group,
  .processing-legend,
  .tool-intro,
  .tool-support-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-heading {
    gap: var(--tt-space-4);
    margin-block-end: var(--tt-space-5);
  }

  .tool-group > header {
    padding-block-end: var(--tt-space-3);
  }

  .tool-table {
    display: block;
  }

  .tool-table colgroup {
    display: none;
  }

  .tool-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  .tool-table tbody {
    display: block;
  }

  .tool-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    grid-template-areas:
      "identity"
      "description"
      "processing";
    gap: var(--tt-space-1);
    padding: var(--tt-space-3) var(--tt-space-2) var(--tt-space-4);
  }

  .tool-row[hidden] {
    display: none;
  }

  .tool-row > th,
  .tool-row > td {
    height: auto;
    display: block;
    padding: 0;
  }

  .tool-identity {
    grid-area: identity;
  }

  .tool-link {
    grid-template-columns: 1.75rem minmax(0, 1fr) 1rem;
  }

  .tool-description {
    grid-area: description;
    padding-inline-start: calc(1.75rem + var(--tt-space-3));
  }

  .tool-processing {
    grid-area: processing;
    justify-self: start;
    padding-block-start: var(--tt-space-2);
    padding-inline-start: calc(1.75rem + var(--tt-space-3));
  }

  .processing-legend {
    gap: var(--tt-space-3);
  }

  .processing-legend dl {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--tt-space-4);
  }

  .tool-intro {
    gap: var(--tt-space-5);
    padding-block-end: var(--tt-space-7);
  }

  .tool-layout {
    padding-block-start: var(--tt-space-6);
  }

  .tool-support-grid {
    gap: var(--tt-space-7);
    margin-block-start: var(--tt-space-8);
  }

  .tool-stage {
    padding: var(--tt-space-3);
  }

  .site-footer {
    display: grid;
    gap: var(--tt-space-5);
  }

  .site-footer nav {
    justify-content: flex-start;
  }

  .content-shell {
    padding-block: var(--tt-space-6) max(var(--tt-space-6), env(safe-area-inset-bottom));
  }

  .content-panel--about {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--tt-space-6);
  }
}

@media (max-width: 32rem) {
  .nav-shell {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    gap: var(--tt-space-1);
    padding-block: var(--tt-space-1);
  }

  .nav-shell > .brand {
    grid-column: 1;
    grid-row: 1;
  }

  .nav-links {
    display: contents;
  }

  .nav-links > a:nth-child(1) {
    grid-column: 1;
    grid-row: 2;
  }

  .nav-links > a:nth-child(2) {
    grid-column: 2;
    grid-row: 2;
  }

  .nav-links > a:nth-child(3) {
    grid-column: 3;
    grid-row: 2;
  }

  .language-picker {
    min-width: 0;
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }

  .language-picker select {
    width: 100%;
  }

  .theme-toggle {
    grid-column: 3;
    grid-row: 1;
  }

  .tool-card-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .theme-toggle [data-theme-label] {
    display: none;
  }

  .nav-links > a,
  .language-picker select,
  .theme-toggle {
    padding-inline: 0.65rem;
  }

  .theme-toggle {
    min-width: 2.75rem;
  }

  .tool-search {
    grid-template-columns: auto minmax(0, 1fr);
    padding: var(--tt-space-2) var(--tt-space-3);
  }

  .tool-search button {
    grid-column: 1 / -1;
    width: 100%;
  }

  .frequent-tools {
    justify-content: center;
  }

  .frequent-tools > span {
    flex-basis: 100%;
  }

  .contact-lines > div {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: var(--tt-space-1);
    padding-block: var(--tt-space-3);
  }
}

@media (pointer: coarse) {
  .nav-links > a,
  .theme-toggle,
  .site-footer nav a,
  .frequent-tools a,
  .breadcrumb a,
  .related-tools a {
    min-height: 2.75rem;
  }
}

@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;
  }
}

@media print {
  .site-header,
  .site-footer,
  .tool-search,
  .tt-ad,
  .tool-rail {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  a[href]::after {
    content: " (" attr(href) ")";
    font-size: 0.8em;
  }
}