:root {
  color-scheme: light;
  --draft: #eef4ff;
  --draft-soft: #e7efff;
  --paper: #f8fbff;
  --paper-light: #fbfdff;
  --paper-deep: #edf4ff;
  --ink: #14213a;
  --muted: #66758f;
  --line: rgba(63, 127, 223, 0.18);
  --line-strong: rgba(63, 127, 223, 0.36);
  --oxide: #6f5fc7;
  --signal: #3f7fdf;
  --danger: #9b392f;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont,
    "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 280px;
  scroll-behavior: smooth;
  scrollbar-gutter: stable;
  background: var(--paper);
}

body {
  min-width: 280px;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 50% 8%, rgba(113, 165, 235, 0.1), transparent 28%),
    var(--paper);
}

[hidden] {
  display: none !important;
}

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

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

button {
  cursor: pointer;
}

a {
  color: inherit;
}

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

.skip-link {
  position: fixed;
  z-index: 50;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  color: #fff;
  background: var(--signal);
  transform: translateY(-160%);
}

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

.tools-footer nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.tool-kicker,
.relay-heading-meta,
.panel-note,
.panel-index,
.tool-card-header > span,
.compact-form label,
.result-strip span,
.relay-panel label,
.created-code-block > span,
.created-status span,
.receive-result-heading,
.tools-footer {
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.category-bar {
  min-height: 68px;
  display: flex;
  position: sticky;
  z-index: 9;
  top: 72px;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(248, 251, 255, 0.92);
  backdrop-filter: blur(10px);
}

.category-switcher {
  width: min(284px, 100%);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px;
  padding: 5px;
  border: 1px solid rgba(190, 214, 242, 0.72);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.72);
  box-shadow: 0 8px 24px rgba(42, 84, 135, 0.055);
}

.category-button {
  min-width: 0;
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  border-radius: 11px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0.02em;
  transition: color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.category-button:hover,
.category-button:focus-visible,
.category-button.is-active {
  color: var(--signal);
  outline: none;
  background: #fff;
  box-shadow: 0 3px 12px rgba(57, 100, 154, 0.09);
}

.tools-surface {
  display: grid;
  position: relative;
  isolation: isolate;
  padding: clamp(48px, 5vw, 78px) clamp(22px, 5.2vw, 84px) clamp(76px, 8vw, 126px);
  background:
    radial-gradient(circle at 50% 8%, rgba(113, 165, 235, 0.09), transparent 28%),
    linear-gradient(180deg, #fbfdff 0%, var(--paper) 100%);
}

.relay-tool,
.tool-library {
  width: min(1500px, 100%);
  position: relative;
  z-index: 1;
  margin-inline: auto;
  grid-area: 1 / 1;
  transition:
    opacity 280ms ease,
    transform 340ms cubic-bezier(0.2, 0.75, 0.25, 1),
    visibility 0s linear;
}

.relay-tool {
  --relay-card: #fff;
  --relay-surface: #fafbfe;
  --relay-line: #e5eaf2;
  --relay-line-strong: #d8dfeb;
  --relay-accent: #2f68ff;
  --relay-accent-soft: #edf3ff;
  --relay-shadow: 0 10px 34px rgba(28, 42, 73, 0.07);
}

.filterable-tool[hidden] {
  display: block !important;
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(18px) scale(0.995);
  transition:
    opacity 220ms ease,
    transform 280ms cubic-bezier(0.4, 0, 0.6, 1),
    visibility 0s linear 280ms;
}

.relay-heading,
.library-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 24px;
}

.tool-kicker {
  margin: 0 0 10px;
  color: var(--oxide);
  font-size: 10px;
  letter-spacing: 0.1em;
}

.relay-heading h2,
.library-heading h2 {
  margin: 0;
  font-family: var(
    --font-handwritten,
    ui-rounded, "PingFang SC", "Microsoft YaHei", cursive, sans-serif
  );
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 0.98;
}

.relay-heading-meta {
  display: grid;
  justify-items: end;
  gap: 7px;
  color: var(--muted);
  font-size: 10px;
  letter-spacing: 0.07em;
  text-transform: none;
}

.relay-heading-meta span:first-child {
  color: var(--signal);
}

.relay-shell {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--relay-line);
  border-radius: 18px;
  background: var(--relay-card);
  box-shadow: var(--relay-shadow);
}

.relay-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin: 14px 14px 0;
  padding: 4px;
  border-radius: 14px;
  background: #eef2f7;
}

.relay-tabs button {
  min-height: 40px;
  border: 0;
  border-radius: 11px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
  font-weight: 680;
  letter-spacing: 0.04em;
  transition: color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.relay-tabs button + button {
  border-left: 0;
}

.relay-tabs button[aria-selected="true"] {
  color: var(--ink);
  background: #fff;
  box-shadow: 0 2px 8px rgba(30, 45, 80, 0.08);
}

.relay-tabs button:focus-visible {
  position: relative;
  z-index: 1;
  outline: 2px solid var(--relay-accent);
  outline-offset: 2px;
}

.relay-panel {
  padding: clamp(22px, 3vw, 38px);
}

.relay-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--relay-line);
}

.relay-panel-header > div {
  display: flex;
  align-items: center;
  gap: 14px;
}

.panel-index {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  color: #fff;
  border-radius: 10px;
  background: var(--relay-accent);
}

.relay-panel-header h3 {
  margin: 0;
  font-family: inherit;
  font-size: 14px;
  font-weight: 730;
  letter-spacing: 0;
}

.tool-card-header h3 {
  font-family: var(
    --font-handwritten,
    ui-rounded, "PingFang SC", "Microsoft YaHei", cursive, sans-serif
  );
  font-weight: 600;
}

.panel-note {
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

#relaySendForm {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(230px, 0.65fr);
  gap: 20px clamp(20px, 3vw, 42px);
}

.share-kind {
  width: 100%;
  display: grid;
  grid-column: 1 / -1;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px;
  border-radius: 14px;
  background: #eef2f7;
}

.share-kind button {
  min-width: 0;
  min-height: 40px;
  border: 0;
  border-radius: 11px;
  color: var(--muted);
  background: transparent;
  font-size: 12px;
  font-weight: 680;
  letter-spacing: 0.02em;
}

.share-kind button.is-active {
  color: var(--ink);
  background: #fff;
  box-shadow: 0 2px 8px rgba(30, 45, 80, 0.08);
}

.share-input-panel {
  grid-row: span 4;
  position: relative;
}

.relay-panel label,
.compact-form label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.relay-panel input:not(.visually-hidden),
.relay-panel textarea,
.compact-form input,
.compact-form select,
.compact-form textarea {
  width: 100%;
  min-height: 40px;
  padding: 0 10px;
  border: 1px solid var(--relay-line);
  border-radius: 10px;
  outline: none;
  color: var(--ink);
  background: #fff;
  font-size: 13px;
  line-height: 1.45;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.relay-panel textarea {
  min-height: 188px;
  padding: 12px;
  border-radius: 16px;
  background: var(--relay-surface);
  resize: vertical;
}

.relay-panel input:not(.visually-hidden):focus,
.relay-panel textarea:focus,
.compact-form input:focus,
.compact-form select:focus,
.compact-form textarea:focus {
  border-color: var(--relay-accent);
  box-shadow: 0 0 0 3px rgba(47, 104, 255, 0.12);
}

.field-meta {
  display: block;
  margin-top: 7px;
  color: var(--muted);
  font-size: 9px;
  text-align: right;
}

.file-drop {
  min-height: 230px;
  display: flex !important;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px !important;
  padding: 28px 16px;
  border: 1.5px dashed var(--relay-line-strong);
  border-radius: 16px;
  color: var(--ink) !important;
  background: var(--relay-surface);
  text-align: center;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease;
}

.file-drop.is-dragging {
  border-color: var(--relay-accent);
  background: var(--relay-accent-soft);
}

.file-drop strong {
  display: block;
  margin-bottom: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0;
}

.file-drop #fileDropMeta {
  color: var(--muted);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.file-drop-gap {
  display: block;
  height: 12px;
}

.file-drop-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 15px;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: var(--relay-accent);
  font-size: 12px;
  font-weight: 680;
}

.file-drop-button:hover,
.file-drop-button:focus-visible {
  outline: none;
  background: #255adf;
}

.relay-options {
  align-self: start;
}

.number-stepper {
  display: grid;
  grid-template-columns: 42px 1fr 42px;
  gap: 6px;
  margin: 8px 0;
}

.number-stepper button,
.number-stepper input {
  min-height: 42px;
  border: 1px solid var(--relay-line);
  border-radius: 10px;
  background: #fff;
}

.number-stepper input {
  text-align: center;
  appearance: textfield;
}

.number-stepper button:hover,
.number-stepper button:focus-visible {
  color: var(--relay-accent);
  border-color: var(--relay-accent);
  outline: none;
}

.number-stepper input::-webkit-outer-spin-button,
.number-stepper input::-webkit-inner-spin-button {
  margin: 0;
  appearance: none;
}

.relay-options > span,
.relay-privacy {
  color: var(--muted);
  font-size: 11px;
  line-height: 1.5;
}

.primary-action {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 20px;
  border: 0;
  border-radius: 12px;
  color: #fff;
  background: var(--relay-accent);
  font-size: 12px;
  font-weight: 680;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.primary-action:hover,
.primary-action:focus-visible {
  outline: none;
  background: #255adf;
}

.primary-action:disabled {
  cursor: wait;
  opacity: 0.55;
}

.relay-privacy {
  margin: 0;
}

.upload-progress {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 8px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.progress-track {
  height: 5px;
  display: block;
  overflow: hidden;
  border-radius: 999px;
  background: var(--relay-line);
}

.progress-track span {
  width: 0;
  height: 100%;
  display: block;
  border-radius: inherit;
  background: var(--relay-accent);
  transition: width 120ms linear;
}

.relay-created {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: clamp(24px, 4vw, 64px);
  align-items: center;
  margin-top: 34px;
  padding: clamp(22px, 3vw, 38px);
  border: 1px solid var(--relay-line);
  border-radius: 16px;
  background: var(--relay-surface);
}

.created-code-block {
  display: grid;
  justify-items: start;
  gap: 8px;
}

.created-code-block > span,
.created-status span {
  color: var(--muted);
  font-size: 8px;
}

.created-code-block strong {
  font-family: "Courier New", Courier, monospace;
  font-size: clamp(44px, 6vw, 80px);
  font-weight: 500;
  letter-spacing: 0.16em;
  line-height: 1;
}

.text-action {
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--relay-line);
  border-radius: 12px;
  color: var(--ink);
  background: #fff;
  font-size: 12px;
  font-weight: 680;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.text-action:hover,
.text-action:focus-visible {
  outline: none;
  color: var(--relay-accent);
  border-color: var(--relay-accent);
}

.created-status {
  display: grid;
  gap: 15px;
}

.created-status div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 26px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--relay-line);
}

.created-status strong {
  font-family: "Courier New", Courier, monospace;
  font-size: 14px;
}

.created-qr {
  display: grid;
  justify-items: center;
}

.created-qr img {
  width: 148px;
  height: 148px;
  padding: 7px;
  border: 1px solid var(--relay-line);
  border-radius: 12px;
  background: #fff;
}

#relayReceiveForm {
  max-width: 560px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  margin-inline: auto;
}

#relayReceiveForm label {
  grid-column: 1 / -1;
}

.code-input {
  min-height: 80px !important;
  font-family: "Courier New", Courier, monospace !important;
  font-size: clamp(36px, 5vw, 62px) !important;
  letter-spacing: 0.35em;
  text-align: center;
}

.receive-result {
  max-width: 800px;
  margin: 32px auto 0;
  padding: 22px;
  border: 1px solid var(--relay-line);
  border-radius: 16px;
  background: var(--relay-surface);
}

.receive-result-heading {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 14px;
  color: var(--muted);
  border-bottom: 1px solid var(--relay-line);
}

#receivedText {
  max-height: 320px;
  margin: 18px 0;
  padding: 16px;
  overflow: auto;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border: 1px solid var(--relay-line);
  border-radius: 12px;
  background: #fff;
  font: 12px/1.65 "Courier New", Courier, monospace;
}

.receive-actions {
  display: flex;
  justify-content: flex-end;
  gap: 16px;
}

.relay-message {
  min-height: 18px;
  margin: 0;
  padding: 0 clamp(24px, 3vw, 44px) 22px;
  color: var(--danger);
  font-size: 10px;
  line-height: 1.5;
}

.relay-message.is-success {
  color: #2f7353;
}

.library-heading {
  margin-bottom: 34px;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: clamp(14px, 1.6vw, 24px);
}

.tool-card {
  min-width: 0;
  border: 1px solid var(--line);
  border-top: 2px solid var(--ink);
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 34px rgba(42, 84, 135, 0.06);
  overflow: hidden;
}

.tool-card-launch {
  border-top-color: var(--signal);
  background: rgba(255, 255, 255, 0.9);
  transition: border-color 180ms ease, box-shadow 180ms ease, transform 180ms ease;
}

.tool-card-launch:hover,
.tool-card-launch:focus-within {
  border-color: rgba(79, 131, 216, 0.58);
  box-shadow: 0 14px 34px rgba(32, 56, 82, 0.09);
  transform: translateY(-2px);
}

.tool-card-link {
  min-height: 100%;
  display: block;
  color: inherit;
  text-decoration: none;
}

.tool-card-link:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 4px;
}

.engineering-tool-preview {
  height: 146px;
  position: relative;
  margin: 22px 24px 18px;
  overflow: hidden;
  border: 1px solid rgba(63, 127, 223, 0.14);
  border-radius: 12px;
  background-color: rgba(248, 251, 255, 0.96);
}

.performance-tool-preview {
  display: grid;
  align-content: center;
  gap: 14px;
  padding: 18px 14px 14px;
  background:
    linear-gradient(rgba(63, 127, 223, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 127, 223, 0.055) 1px, transparent 1px),
    linear-gradient(145deg, #fbfdff, #f3f7ff);
  background-size: 18px 18px, 18px 18px, auto;
}

.performance-chain {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 4px;
}

.performance-chain > span {
  min-width: 0;
  display: grid;
  justify-items: center;
  gap: 2px;
  padding: 8px 3px;
  border: 1px solid rgba(63, 127, 223, 0.18);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 5px 14px rgba(42, 84, 135, 0.055);
}

.performance-chain small {
  color: #8fa4bf;
  font-size: 6px;
  letter-spacing: 0.12em;
}

.performance-chain b {
  max-width: 100%;
  overflow: hidden;
  color: #315f9f;
  font-size: 8px;
  text-overflow: ellipsis;
}

.performance-chain em {
  color: var(--muted);
  font-size: 6px;
  font-style: normal;
}

.performance-chain > i {
  color: #8173ca;
  font-size: 11px;
  font-style: normal;
}

.performance-tool-preview > p {
  margin: 0;
  color: #6e7f97;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 9px;
  letter-spacing: 0.02em;
  text-align: center;
}

.performance-tool-preview sub {
  font-size: 0.72em;
}

.spectrum-tool-preview {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 6px;
  padding: 24px 18px 20px;
  background:
    linear-gradient(rgba(63, 127, 223, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 127, 223, 0.06) 1px, transparent 1px),
    rgba(248, 251, 255, 0.96);
  background-size: 18px 18px;
}

.spectrum-tool-preview span {
  width: 8%;
  min-height: 12%;
  display: block;
  border-radius: 999px 999px 3px 3px;
  background: linear-gradient(180deg, #7aa9ea, #685fd0);
  box-shadow: 0 4px 12px rgba(73, 92, 185, 0.16);
}

.spectrum-tool-preview i {
  position: absolute;
  right: 14px;
  bottom: 20px;
  left: 14px;
  height: 1px;
  background: rgba(63, 127, 223, 0.24);
}

.spectrum-bar-a { height: 34%; }
.spectrum-bar-b { height: 68%; }
.spectrum-bar-c { height: 46%; }
.spectrum-bar-d { height: 84%; }
.spectrum-bar-e { height: 58%; }
.spectrum-bar-f { height: 72%; }
.spectrum-bar-g { height: 40%; }
.spectrum-bar-h { height: 61%; }

.port-tool-preview {
  display: grid;
  grid-template-columns: 1fr 0.95fr;
  align-items: center;
  gap: 18px;
  padding: 12px 18px;
  background:
    radial-gradient(circle at 30% 42%, rgba(122, 169, 234, 0.12), transparent 45%),
    linear-gradient(145deg, #fbfdff, #f4f7ff);
}

.port-section {
  width: 82px;
  height: 118px;
  position: relative;
  justify-self: end;
}

.cylinder-wall {
  position: absolute;
  top: 8px;
  right: 17px;
  bottom: 34px;
  left: 17px;
  border: 2px solid #587cac;
  border-top: 0;
  border-radius: 0 0 8px 8px;
  background: rgba(255, 255, 255, 0.72);
}

.cylinder-head {
  position: absolute;
  top: 4px;
  left: 13px;
  width: 56px;
  height: 13px;
  border: 2px solid #587cac;
  border-radius: 10px 10px 4px 4px;
  background: #e8f1ff;
}

.piston-crown {
  position: absolute;
  top: 43px;
  left: 21px;
  z-index: 2;
  width: 40px;
  height: 25px;
  border: 2px solid #506887;
  border-radius: 7px 7px 3px 3px;
  background: linear-gradient(180deg, #fff, #dfe9f6);
  box-shadow: inset 0 -5px 0 rgba(92, 116, 146, 0.1);
}

.port-window {
  position: absolute;
  z-index: 3;
  width: 9px;
  border-radius: 2px;
}

.port-window-exhaust {
  top: 28px;
  right: 13px;
  height: 18px;
  background: #7c70c9;
}

.port-window-transfer {
  top: 50px;
  left: 13px;
  height: 14px;
  background: #64a3dd;
}

.connecting-rod {
  position: absolute;
  top: 64px;
  left: 39px;
  width: 4px;
  height: 35px;
  border-radius: 99px;
  background: #7387a1;
  transform: rotate(-10deg);
  transform-origin: top;
}

.crank-pin {
  position: absolute;
  left: 29px;
  bottom: 6px;
  width: 25px;
  height: 25px;
  border: 5px solid #7387a1;
  border-radius: 50%;
  background: #f8fbff;
}

.port-legend {
  display: grid;
  gap: 14px;
  color: #62738b;
  font-size: 7px;
  font-weight: 700;
  letter-spacing: 0.09em;
}

.port-legend span {
  display: flex;
  align-items: center;
  gap: 7px;
}

.port-legend i {
  width: 18px;
  height: 5px;
  border-radius: 99px;
}

.legend-exhaust { background: #7c70c9; }
.legend-transfer { background: #64a3dd; }

.doe-tool-preview {
  background:
    linear-gradient(90deg, rgba(79, 131, 216, 0.06) 1px, transparent 1px),
    linear-gradient(rgba(79, 131, 216, 0.06) 1px, transparent 1px),
    rgba(246, 248, 250, 0.94);
  background-size: 25% 100%, 100% 25%, auto;
}

.doe-table-lines {
  position: absolute;
  inset: 15px;
  display: block;
  border: 1px solid rgba(32, 36, 34, 0.14);
}

.doe-dot {
  width: 10px;
  height: 10px;
  position: absolute;
  display: block;
  border: 2px solid #fff;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 2px 7px rgba(38, 70, 112, 0.2);
}

.dot-a { top: 24%; left: 18%; }
.dot-b { top: 59%; left: 32%; }
.dot-c { top: 37%; left: 49%; }
.dot-d { top: 69%; left: 67%; }
.dot-e { top: 20%; left: 82%; }

.tool-card-open {
  min-height: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: 0 24px 22px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--signal);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.1em;
}

.tool-card-open b {
  font-size: 16px;
  font-weight: 500;
}

.tool-card-header {
  min-height: 152px;
  padding: 24px;
  border-bottom: 1px solid var(--line);
}

.tool-card-header > span {
  color: var(--oxide);
  font-size: 9px;
  letter-spacing: 0.08em;
}

.tool-card-header h3 {
  margin: 18px 0 9px;
  font-size: clamp(17px, 1.4vw, 21px);
  letter-spacing: 0.02em;
}

.tool-card-header p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}

.compact-form {
  display: grid;
  gap: 14px;
  padding: 24px;
}

.compact-form label {
  font-size: 8px;
}

.compact-form textarea {
  min-height: 86px;
  resize: vertical;
}

.inline-fields {
  display: grid;
  grid-template-columns: 1fr 0.75fr 0.75fr;
  gap: 8px;
}

.result-strip {
  min-height: 64px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 14px;
  margin-top: 4px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.result-strip span {
  color: var(--muted);
  font-size: 7px;
}

.result-strip output {
  overflow: hidden;
  font-family: "Courier New", Courier, monospace;
  font-size: clamp(18px, 1.7vw, 25px);
  font-weight: 600;
  text-align: right;
  text-overflow: ellipsis;
}

.summary-output {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.summary-output div {
  min-width: 0;
  padding: 10px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.summary-output dt {
  color: var(--muted);
  font-size: 7px;
  font-weight: 600;
  letter-spacing: 0.12em;
}

.summary-output dd {
  overflow: hidden;
  margin: 7px 0 0;
  font-family: "Courier New", Courier, monospace;
  font-size: 14px;
  text-overflow: ellipsis;
}

.empty-filter {
  margin: 42px 0 0;
  color: var(--muted);
  text-align: center;
}

.tools-footer {
  min-height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px clamp(22px, 4.8vw, 72px);
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: var(--paper);
}

.tools-footer a {
  color: var(--muted);
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-decoration-color: transparent;
}

.tools-footer a:hover,
.tools-footer a:focus-visible {
  color: var(--ink);
  text-decoration-color: currentColor;
  text-underline-offset: 4px;
}

@media (max-width: 1040px) {
  .tool-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  #relaySendForm {
    grid-template-columns: minmax(0, 1.25fr) minmax(210px, 0.75fr);
  }
}

@media (max-width: 760px) {
  .category-bar {
    min-height: 64px;
    top: 64px;
    justify-content: center;
    padding-inline: 18px;
  }

  .tools-surface {
    padding: 46px 18px 76px;
  }

  .relay-heading,
  .library-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 15px;
  }

  .relay-heading-meta {
    justify-items: start;
  }

  .relay-panel {
    padding: 22px 16px;
  }

  .relay-panel-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  #relaySendForm {
    grid-template-columns: 1fr;
  }

  .share-input-panel {
    grid-row: auto;
  }

  .relay-created {
    grid-template-columns: 1fr;
  }

  .created-qr {
    justify-items: start;
  }

  #relayReceiveForm {
    grid-template-columns: 1fr;
  }

  .code-input {
    min-height: 68px !important;
  }

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

  .tool-card-header {
    min-height: auto;
  }

  .tools-footer {
    min-height: 44px;
    display: block;
    padding: 10px 12px max(10px, env(safe-area-inset-bottom));
    font-size: 0;
  }

  .tools-footer > span {
    display: none;
  }

  .tools-footer nav {
    display: grid;
    grid-template-columns: max-content max-content;
    justify-content: center;
    gap: 6px;
    white-space: nowrap;
  }

  .tools-footer a {
    font-size: clamp(6.5px, 2vw, 9px);
    letter-spacing: 0.02em;
    line-height: 1;
  }
}

@media (max-width: 430px) {
  .created-code-block strong {
    font-size: 48px;
  }

  .inline-fields {
    grid-template-columns: 1fr 1fr;
  }

  .inline-fields label:first-child {
    grid-column: 1 / -1;
  }

  .summary-output {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
  }
}