:root {
  --ink: #17213f;
  --ink-soft: #53607c;
  --paper: #f4f6fb;
  --paper-deep: #e6eaf4;
  --white: #ffffff;
  --line: #cbd2e3;
  --blue: #3157e1;
  --blue-deep: #213da7;
  --marker: #d8ff59;
  --pink: #ff6d8d;
  --orange: #ffac4b;
  --cyan: #55d9d0;
  --severity-risk: #b53751;
  --severity-risk-deep: #7f2437;
  --severity-risk-soft: #ffe2e8;
  --severity-notice: var(--orange);
  --severity-notice-deep: #925714;
  --severity-notice-soft: #fff1dd;
  --severity-structure: #aeb7ca;
  --severity-structure-deep: #68748f;
  --severity-structure-soft: #eef1f7;
  --shadow: 0 18px 60px rgba(23, 33, 63, 0.1);
  --display: "Arial Narrow", "Aptos Display", "Segoe UI", sans-serif;
  --body: "Segoe UI", "Microsoft YaHei", sans-serif;
  --mono: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(49, 87, 225, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(49, 87, 225, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 28px 28px;
  font-family: var(--body);
  min-width: 320px;
}

button,
textarea,
input {
  font: inherit;
}

button {
  color: inherit;
}

button:focus-visible,
textarea:focus-visible,
[tabindex="0"]:focus-visible,
input:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.page-shell {
  width: min(1400px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  height: 88px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--ink);
  text-decoration: none;
  font-family: var(--display);
  font-size: 1.1rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  overflow: hidden;
  color: var(--white);
  background: var(--blue);
  border-radius: 6px 14px 6px 6px;
  box-shadow: 4px 4px 0 var(--marker);
}

.brand-symbol {
  width: 30px;
  height: 30px;
}

.brand-symbol-brackets,
.brand-symbol-scan {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-symbol-brackets {
  stroke: var(--white);
  stroke-width: 2.5;
}

.brand-symbol-scan {
  stroke: var(--marker);
  stroke-width: 1.55;
}

.brand-symbol-hidden {
  fill: var(--white);
  stroke: var(--blue-deep);
  stroke-width: 1.1;
}

.brand:focus-visible {
  border-radius: 3px;
  outline: 3px solid var(--orange);
  outline-offset: 4px;
}

.privacy-note {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink-soft);
  font-size: 0.82rem;
  font-weight: 650;
}

.privacy-dot {
  width: 8px;
  height: 8px;
  border: 2px solid var(--white);
  border-radius: 50%;
  background: #39a96b;
  box-shadow: 0 0 0 1px #39a96b;
}

.hero {
  min-height: 550px;
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(390px, 0.9fr);
  align-items: center;
  gap: clamp(52px, 6vw, 110px);
  padding: 72px 4vw 70px;
}

.hero-copy {
  min-width: 0;
}

.eyebrow,
.step-label {
  margin: 0 0 18px;
  color: var(--blue);
  font: 700 0.72rem var(--mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 800px;
  font-family: "Microsoft YaHei UI", "Microsoft YaHei", "PingFang SC", var(--display);
  font-size: clamp(3.6rem, 6.2vw, 6.9rem);
  font-weight: 900;
  line-height: 1.02;
  letter-spacing: -0.055em;
}

.hero-title-line {
  display: block;
  width: max-content;
  max-width: 100%;
  white-space: nowrap;
}

.hero-title-accent {
  position: relative;
  z-index: 0;
  color: var(--blue);
}

.hero-title-accent::after {
  content: "";
  position: absolute;
  z-index: -1;
  right: -3%;
  bottom: 3%;
  left: -2%;
  height: 23%;
  background: var(--marker);
  transform: rotate(-1.8deg);
}

.hero-lede {
  max-width: 640px;
  margin: 34px 0 0;
  color: var(--ink-soft);
  font-size: clamp(1rem, 1.4vw, 1.22rem);
  line-height: 1.75;
}

.specimen {
  position: relative;
  padding: 30px 30px 20px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--white);
  box-shadow: var(--shadow);
  transform: rotate(2.5deg);
}

.specimen::before,
.specimen::after {
  content: "";
  position: absolute;
  width: 56px;
  height: 16px;
  background: rgba(216, 255, 89, 0.78);
}

.specimen::before {
  top: -8px;
  left: 32px;
  transform: rotate(-4deg);
}

.specimen::after {
  right: 30px;
  bottom: -8px;
  transform: rotate(5deg);
}

.specimen-label {
  color: var(--ink-soft);
  font: 700 0.65rem var(--mono);
  letter-spacing: 0.16em;
}

.specimen-line {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 150px;
  overflow: hidden;
  font: 700 clamp(1rem, 2.2vw, 1.65rem) var(--mono);
  white-space: nowrap;
}

.specimen-line i {
  margin: 0 5px;
  padding: 9px 6px 8px;
  color: var(--white);
  background: var(--blue);
  border-radius: 3px;
  font-size: 0.52em;
  font-style: normal;
  letter-spacing: 0.06em;
}

.specimen-ruler {
  display: flex;
  justify-content: space-between;
  padding-top: 10px;
  border-top: 1px solid var(--line);
  color: #8b96af;
  font: 0.65rem var(--mono);
}

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 0.78fr);
  margin-bottom: 110px;
  border: 1px solid var(--ink);
  border-radius: 12px;
  box-shadow: 10px 10px 0 var(--ink);
  overflow: hidden;
}

.panel {
  background: var(--white);
}

.input-panel {
  padding: 34px;
}

.panel-heading,
.section-heading,
.card-heading,
.preview-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.panel-heading h2,
.section-heading h2,
.cleaner h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 850;
  letter-spacing: -0.045em;
}

.text-button {
  padding: 8px 0 5px;
  border: 0;
  border-bottom: 2px solid var(--blue);
  background: transparent;
  color: var(--blue);
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 750;
}

.input-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 20px;
}

.file-button {
  cursor: pointer;
}

.file-button:focus-within {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.textarea-wrap {
  position: relative;
  min-height: 315px;
  margin-top: 24px;
}

textarea {
  position: relative;
  z-index: 1;
  width: 100%;
  min-height: 315px;
  resize: vertical;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: rgba(244, 246, 251, 0.58);
  color: var(--ink);
  font: 0.94rem/1.7 var(--mono);
  caret-color: var(--blue);
}

textarea::placeholder {
  color: #9ca5ba;
}

.file-drop-overlay {
  position: absolute;
  z-index: 3;
  inset: 10px;
  display: grid;
  place-content: center;
  gap: 7px;
  border: 2px dashed var(--blue);
  border-radius: 6px;
  background: rgba(244, 246, 251, 0.96);
  color: var(--ink);
  pointer-events: none;
  text-align: center;
  opacity: 0;
  transform: scale(0.985);
  transition: opacity 140ms ease, transform 140ms ease;
}

.file-drop-overlay b {
  color: var(--blue);
  font: 850 1rem var(--display);
  letter-spacing: -0.02em;
}

.file-drop-overlay span {
  color: var(--ink-soft);
  font: 0.68rem var(--mono);
}

.textarea-wrap.is-dragging .file-drop-overlay {
  opacity: 1;
  transform: scale(1);
}

.textarea-wrap.is-dragging .empty-hint {
  opacity: 0;
}

.empty-hint {
  position: absolute;
  z-index: 2;
  right: 24px;
  bottom: 22px;
  display: flex;
  align-items: center;
  gap: 6px;
  pointer-events: none;
  opacity: 1;
  transition: opacity 160ms ease;
}

.empty-hint.is-hidden {
  opacity: 0;
}

.empty-hint span {
  padding: 5px 7px;
  border: 1px solid var(--line);
  border-bottom-width: 3px;
  border-radius: 4px;
  background: var(--white);
  color: var(--ink-soft);
  font: 0.64rem var(--mono);
}

.empty-hint b {
  color: #9ca5ba;
  font-size: 0.72rem;
}

.input-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 12px;
  color: var(--ink-soft);
  font: 0.7rem var(--mono);
}

.verdict-panel {
  padding: 34px;
  border-left: 1px solid var(--ink);
  background: var(--blue);
  color: var(--white);
}

.verdict-panel .step-label {
  color: var(--marker);
}

.verdict-number {
  margin: 46px 0 8px;
  font-family: var(--display);
  font-size: clamp(6rem, 12vw, 10rem);
  font-weight: 900;
  line-height: 0.72;
  letter-spacing: -0.07em;
}

.verdict-panel h2 {
  margin: 24px 0 12px;
  font-family: var(--display);
  font-size: 1.7rem;
  letter-spacing: -0.03em;
}

.verdict-panel p:not(.step-label) {
  min-height: 48px;
  margin: 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9rem;
  line-height: 1.6;
}

.verdict-panel .origin-hint {
  min-height: 0;
  margin-top: 18px;
  padding: 11px 13px 12px 15px;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(7, 18, 55, 0.2);
  box-shadow: inset 3px 0 0 var(--marker);
  color: rgba(255, 255, 255, 0.9);
  font: 0.72rem/1.55 var(--mono);
}

.verdict-panel .origin-hint::before {
  display: block;
  margin-bottom: 5px;
  color: var(--marker);
  content: "AI COPY ALERT / 隐藏字符警报";
  font-size: 0.62rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.verdict-panel .origin-hint[hidden] {
  display: none;
}

.meter {
  height: 7px;
  margin: 30px 0;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
}

.meter span {
  display: block;
  width: 0;
  height: 100%;
  background: var(--marker);
  transition: width 350ms cubic-bezier(0.2, 0.8, 0.2, 1);
}

.quick-stats {
  margin: 0;
}

.quick-stats div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 13px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.22);
}

.quick-stats dt {
  display: flex;
  align-items: center;
  gap: 7px;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.78rem;
}

.stat-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.stat-risk {
  background: #ff8ca4;
}

.stat-notice {
  background: var(--severity-notice);
}

.stat-structure {
  background: #d7ddea;
}

.quick-stats dd {
  margin: 0;
  font: 700 1rem var(--mono);
}

.report-button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 25px;
  padding: 13px 14px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 5px;
  background: var(--white);
  box-shadow: 4px 4px 0 var(--marker);
  color: var(--ink);
  cursor: pointer;
  text-align: left;
  transition: box-shadow 160ms ease, transform 160ms ease;
}

.report-button span {
  font-size: 0.78rem;
  font-weight: 850;
}

.report-button small {
  color: var(--ink-soft);
  font: 0.56rem var(--mono);
  white-space: nowrap;
}

.report-button:hover:not(:disabled) {
  box-shadow: 6px 6px 0 var(--marker);
  transform: translate(-1px, -1px);
}

.report-button:disabled {
  cursor: not-allowed;
  box-shadow: none;
  opacity: 0.42;
}

.results {
  margin-bottom: 115px;
}

.section-heading {
  align-items: flex-end;
  margin-bottom: 28px;
}

.result-tools {
  display: grid;
  justify-items: end;
  gap: 14px;
}

.structure-toggle {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink-soft);
  cursor: pointer;
  font: 0.68rem var(--mono);
}

.structure-toggle input {
  width: 15px;
  height: 15px;
  margin: 0;
  accent-color: var(--blue);
}

.legend {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 18px;
  color: var(--ink-soft);
  font: 0.68rem var(--mono);
}

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

.legend i {
  width: 9px;
  height: 9px;
  border-radius: 2px;
}

.legend-risk {
  background: var(--severity-risk);
}

.legend-notice {
  background: var(--severity-notice);
}

.legend-structure {
  background: var(--severity-structure);
}

.xray-frame {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  min-height: 290px;
  border: 1px solid var(--ink);
  border-radius: 9px;
  background: var(--white);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.xray-gutter {
  padding-top: 26px;
  border-right: 1px solid var(--line);
  background: var(--paper-deep);
  color: #7d88a3;
  font: 700 0.64rem/1.55 var(--mono);
  letter-spacing: 0.08em;
  text-align: center;
}

.xray-output {
  min-width: 0;
  padding: 30px;
  overflow: auto;
  font: 0.95rem/2.35 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.xray-token {
  position: relative;
  display: inline-block;
  min-width: 2px;
  margin: 0 2px;
  padding: 1px 5px;
  border-radius: 3px;
  color: var(--ink);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1.6;
  vertical-align: baseline;
  white-space: nowrap;
}

.xray-token::after {
  content: attr(data-code);
  position: absolute;
  top: -15px;
  left: 50%;
  color: #73809d;
  font-size: 0.48rem;
  font-weight: 500;
  transform: translateX(-50%);
}

.xray-token.severity-notice {
  color: var(--ink);
  background: color-mix(in srgb, var(--severity-notice) 35%, white);
  box-shadow: inset 0 -2px 0 var(--severity-notice);
}

.xray-token.severity-risk {
  color: var(--white);
  background: var(--severity-risk);
  box-shadow: inset 0 -2px 0 var(--severity-risk-deep);
}

.xray-token.severity-structure {
  color: var(--ink-soft);
  background: var(--severity-structure-soft);
  box-shadow: inset 0 -1px 0 var(--severity-structure);
}

.xray-token.severity-structure::after {
  color: #a0a9bb;
}

.xray-line-break {
  display: inline-block;
  width: 100%;
  height: 0;
}

.result-empty {
  margin: 0;
  color: #8b96ad;
  font-size: 0.88rem;
  line-height: 1.7;
}

.evidence-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  margin-top: 22px;
}

.findings-card,
.source-card {
  min-width: 0;
  min-height: 340px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: rgba(255, 255, 255, 0.82);
}

.card-heading {
  align-items: center;
  min-height: 32px;
  margin-bottom: 22px;
}

.card-heading h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.2rem;
}

#finding-badge {
  padding: 4px 8px;
  border-radius: 999px;
  background: var(--paper-deep);
  color: var(--ink-soft);
  font: 0.66rem var(--mono);
}

.findings-list {
  display: grid;
  gap: 9px;
}

.finding-row {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--white);
}

.finding-row[data-severity="risk"] {
  border-color: #e3a6b3;
  background: #fffafb;
}

.finding-swatch {
  width: 10px;
  height: 10px;
  margin-top: 6px;
  border-radius: 2px;
  background: var(--severity-notice);
}

.finding-row[data-severity="risk"] .finding-swatch {
  background: var(--severity-risk);
}

.finding-row[data-severity="structure"] .finding-swatch {
  background: var(--severity-structure);
}

.finding-name {
  min-width: 0;
}

.finding-body {
  min-width: 0;
}

.finding-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: 9px;
}

.finding-name b {
  display: block;
  overflow: hidden;
  font-size: 0.78rem;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.finding-name small {
  display: block;
  margin-top: 3px;
  color: var(--ink-soft);
  font: 0.59rem/1.5 var(--mono);
}

.finding-severity {
  padding: 4px 6px;
  border-radius: 4px;
  background: var(--severity-notice-soft);
  color: var(--severity-notice-deep);
  font: 700 0.58rem var(--mono);
}

.finding-recovery {
  padding: 4px 7px;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--ink-soft);
  font: 700 0.58rem var(--mono);
}

.finding-row[data-type="unknown"] .finding-recovery {
  border-color: #e3a6b3;
  color: #9a2941;
  background: #fff1f4;
}

.finding-row[data-severity="risk"] .finding-severity {
  background: var(--severity-risk-soft);
  color: #9a2941;
}

.finding-row[data-severity="structure"] .finding-severity {
  background: var(--severity-structure-soft);
  color: var(--severity-structure-deep);
}

.finding-total {
  min-width: 30px;
  font: 700 0.76rem var(--mono);
  text-align: right;
}

.finding-context {
  display: block;
  margin: 14px 0 10px;
  padding: 11px 13px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--paper);
  color: var(--ink);
  font: 0.72rem/1.6 var(--mono);
  white-space: pre;
}

.finding-explanation {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 0.78rem;
  font-weight: 650;
  line-height: 1.6;
}

.finding-guidance {
  display: grid;
  grid-template-columns: 70px minmax(0, 1fr);
  gap: 7px 12px;
  margin: 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.finding-guidance dt {
  color: var(--ink-soft);
  font: 700 0.62rem/1.6 var(--mono);
}

.finding-guidance dd {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.72rem;
  line-height: 1.6;
}

.source-tabs {
  display: inline-grid;
  grid-template-columns: repeat(2, max-content);
  flex: 0 0 auto;
  padding: 3px;
  border: 1px solid var(--ink);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 3px 3px 0 var(--paper-deep);
}

.source-intro {
  max-width: 980px;
  margin-bottom: 18px;
}

.source-intro .step-label {
  margin-bottom: 9px;
}

.source-intro h3 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.25rem;
}

.source-intro > p:last-child {
  max-width: 860px;
  margin: 9px 0 0;
  color: var(--ink-soft);
  font-size: 0.82rem;
  line-height: 1.75;
}

.source-toolbar {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 13px;
}

.source-format-help {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.76rem;
  line-height: 1.55;
}

.source-tab {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  gap: 7px;
  padding: 7px 12px;
  border: 0;
  border-radius: 5px;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background 160ms ease, color 160ms ease, box-shadow 160ms ease;
}

.source-tab + .source-tab {
  margin-left: 2px;
}

.source-tab-label {
  font: 700 0.76rem/1.2 var(--body);
  white-space: nowrap;
}

.source-tab small {
  color: currentColor;
  font: 600 0.6rem/1 var(--mono);
  opacity: 0.7;
  white-space: nowrap;
}

.source-tab:hover:not(.is-active) {
  background: var(--paper);
  color: var(--ink);
}

.source-tab.is-active {
  background: var(--blue);
  color: var(--white);
  box-shadow: inset 0 -3px 0 var(--marker);
}

.source-tab:focus-visible {
  position: relative;
  z-index: 1;
  outline: 0;
  box-shadow: inset 0 0 0 2px var(--blue);
}

.source-tab.is-active:focus-visible {
  box-shadow: inset 0 -3px 0 var(--marker);
}

.source-tab-count {
  display: inline-grid;
  min-width: 17px;
  height: 17px;
  place-items: center;
  border-radius: 999px;
  background: var(--blue);
  color: var(--white);
  font: 800 0.55rem/1 var(--mono);
}

.source-tab.is-active .source-tab-count {
  background: var(--marker);
  color: var(--ink);
}

.source-tab-count[hidden] {
  display: none;
}

.source-output {
  height: 244px;
  margin: 0;
  padding: 18px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8f9fc;
  color: var(--ink-soft);
  font: 0.72rem/1.65 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.cleaner {
  display: grid;
  grid-template-columns: 0.7fr 0.9fr 1.25fr;
  gap: 44px;
  margin-bottom: 70px;
  padding: 48px;
  border-radius: 12px;
  background: var(--ink);
  color: var(--white);
}

.cleaner .step-label {
  color: var(--marker);
}

.cleaner h2 {
  color: var(--white);
}

.cleaner-copy > p:last-child {
  color: rgba(255, 255, 255, 0.64);
  font-size: 0.88rem;
  line-height: 1.7;
}

.clean-options {
  display: grid;
  align-content: start;
  gap: 10px;
  margin: 0;
  padding: 0;
  border: 0;
}

.clean-options label {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 12px;
  padding: 10px 0;
  cursor: pointer;
}

.clean-options input {
  width: 17px;
  height: 17px;
  margin: 2px 0 0;
  accent-color: var(--marker);
}

.clean-options b,
.clean-options small {
  display: block;
}

.clean-options b {
  font-size: 0.82rem;
}

.clean-options small {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.5);
  font: 0.62rem var(--mono);
}

.clean-preview {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 20px;
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
}

.preview-heading {
  margin-bottom: 12px;
  color: var(--ink-soft);
  font: 0.65rem var(--mono);
}

.clean-preview pre {
  flex: 1;
  min-height: 168px;
  margin: 0 0 14px;
  padding: 14px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--paper);
  font: 0.72rem/1.6 var(--mono);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.copy-button {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border: 0;
  border-radius: 5px;
  background: var(--marker);
  color: var(--ink);
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 800;
}

.copy-button:disabled {
  cursor: not-allowed;
  filter: grayscale(1);
  opacity: 0.5;
}

.copy-button kbd {
  padding: 3px 5px;
  border: 1px solid rgba(23, 33, 63, 0.25);
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.35);
  font: 0.6rem var(--mono);
}

footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0 44px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font: 0.68rem var(--mono);
}

footer p {
  margin: 0;
}

.footer-profile {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  min-height: 38px;
  padding: 4px 11px 4px 4px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.62);
  box-shadow: 3px 3px 0 var(--marker);
  color: var(--ink);
  font-weight: 750;
  text-decoration: none;
  transition: background 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.footer-profile-mark {
  position: relative;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: 3px 9px 3px 3px;
  background: var(--blue);
  color: var(--white);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}

.footer-profile-mark::after {
  position: absolute;
  top: 3px;
  right: 3px;
  width: 5px;
  height: 5px;
  border-top: 1px solid var(--marker);
  border-right: 1px solid var(--marker);
  content: "";
}

.footer-profile-icon {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

.footer-profile-arrow {
  color: var(--blue);
  font-size: 0.8rem;
}

.footer-profile:hover {
  background: var(--white);
  box-shadow: 4px 4px 0 var(--marker);
  transform: translate(-1px, -1px);
}

.footer-profile:focus-visible {
  outline: 3px solid var(--orange);
  outline-offset: 3px;
}

.toast {
  position: fixed;
  z-index: 10;
  right: 24px;
  bottom: 24px;
  padding: 13px 18px;
  border-radius: 6px;
  background: var(--ink);
  color: var(--white);
  box-shadow: var(--shadow);
  font-size: 0.8rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 180ms ease, transform 180ms ease;
}

.toast.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 52px;
    padding-inline: 0;
  }

  .specimen {
    width: min(540px, 88%);
    justify-self: end;
  }

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

  .verdict-panel {
    border-top: 1px solid var(--ink);
    border-left: 0;
  }

  .verdict-number {
    margin-top: 30px;
  }

  .quick-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .quick-stats div {
    display: block;
  }

  .quick-stats dd {
    margin-top: 7px;
  }

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

  .clean-preview {
    grid-column: 1 / -1;
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100% - 28px, 1400px);
  }

  .site-header {
    height: 72px;
  }

  .brand {
    font-size: 0.9rem;
  }

  .hero {
    min-height: auto;
    padding: 66px 0 74px;
  }

  .hero h1 {
    font-size: clamp(2.9rem, 13.5vw, 4.8rem);
    line-height: 1.06;
    letter-spacing: -0.045em;
  }

  .specimen {
    width: 94%;
    padding-inline: 18px;
  }

  .workbench {
    margin-bottom: 80px;
    box-shadow: 6px 6px 0 var(--ink);
  }

  .input-panel,
  .verdict-panel {
    padding: 24px 20px;
  }

  .panel-heading,
  .section-heading {
    display: block;
  }

  .text-button {
    margin-top: 16px;
  }

  .input-actions {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 0 20px;
  }

  .textarea-wrap,
  textarea {
    min-height: 260px;
  }

  .quick-stats {
    gap: 10px;
  }

  .results {
    margin-bottom: 80px;
  }

  .legend {
    justify-content: flex-start;
    margin-top: 20px;
    gap: 12px;
  }

  .result-tools {
    justify-items: start;
    margin-top: 20px;
  }

  .result-tools .legend {
    margin-top: 0;
  }

  .xray-frame {
    grid-template-columns: 42px minmax(0, 1fr);
  }

  .xray-output {
    padding: 28px 18px;
  }

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

  .findings-card,
  .source-card {
    min-height: auto;
    padding: 20px;
  }

  .source-toolbar {
    align-items: flex-start;
    flex-direction: column;
    gap: 9px;
  }

  .source-tabs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    width: 100%;
  }

  .source-tab {
    min-width: 0;
    padding-inline: 8px;
  }

  .finding-summary {
    grid-template-columns: 1fr auto auto;
  }

  .finding-name {
    grid-column: 1 / -1;
  }

  .finding-guidance {
    grid-template-columns: 1fr;
  }

  .finding-guidance dd + dt {
    margin-top: 6px;
  }

  .cleaner {
    grid-template-columns: 1fr;
    gap: 26px;
    padding: 32px 20px;
  }

  .clean-preview {
    grid-column: auto;
  }

  footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    line-height: 1.6;
  }

  .footer-profile {
    margin-top: 4px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}