:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-muted: #eef3f7;
  --ink: #18202a;
  --muted: #647386;
  --line: #d8e0e8;
  --accent: #1f7a6d;
  --accent-strong: #155f55;
  --warning: #b86418;
  --danger: #b83232;
  --ok: #21764d;
  --shadow: 0 18px 50px rgba(32, 45, 61, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(90deg, rgba(31, 122, 109, 0.1), transparent 35%),
    var(--bg);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Microsoft YaHei", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.workspace {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  min-height: calc(100vh - 64px);
  background: var(--surface);
  border: 1px solid rgba(216, 224, 232, 0.85);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.side-panel {
  display: flex;
  flex-direction: column;
  gap: 22px;
  padding: 28px;
  background: #22313d;
  color: #f7fbff;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.12);
}

.brand h1,
.topbar h2,
.panel h3,
.rule-box h2 {
  margin: 0;
}

.brand h1 {
  font-size: 20px;
  line-height: 1.25;
}

.brand p,
.eyebrow,
.panel-heading span,
.rule-box,
.status-card .label,
.stats-grid span {
  color: var(--muted);
}

.brand p {
  margin: 4px 0 0;
  color: rgba(247, 251, 255, 0.72);
  font-size: 13px;
}

.status-card,
.rule-box,
.stats-grid > div {
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.status-card {
  padding: 18px;
}

.status-card .label {
  color: rgba(247, 251, 255, 0.65);
  font-size: 13px;
}

.status-card strong {
  display: block;
  margin-top: 8px;
  font-size: 24px;
}

.meter {
  height: 8px;
  margin-top: 18px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.18);
}

.meter span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--ok);
  transition: width 180ms ease, background 180ms ease;
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.stats-grid > div {
  padding: 16px;
}

.stats-grid span {
  display: block;
  color: rgba(247, 251, 255, 0.64);
  font-size: 12px;
}

.stats-grid strong {
  display: block;
  margin-top: 6px;
  font-size: 26px;
}

.rule-box {
  padding: 18px;
  margin-top: auto;
  color: rgba(247, 251, 255, 0.76);
}

.rule-box h2 {
  color: #ffffff;
  font-size: 15px;
}

.rule-box ul {
  margin: 12px 0 0;
  padding-left: 18px;
  line-height: 1.8;
  font-size: 13px;
}

.main-panel {
  min-width: 0;
  padding: 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  margin: 0 0 6px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.topbar h2 {
  font-size: clamp(24px, 3vw, 36px);
  line-height: 1.15;
}

.icon-button {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
}

.icon-button:hover {
  color: var(--ink);
  border-color: #b8c5d1;
}

.review-form {
  display: grid;
  gap: 10px;
  margin-top: 24px;
}

.review-form label {
  font-size: 14px;
  font-weight: 700;
}

.url-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
}

input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  color: var(--ink);
  outline: none;
}

input {
  height: 46px;
  padding: 0 14px;
}

textarea {
  resize: vertical;
  min-height: 180px;
  padding: 14px;
  line-height: 1.65;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(31, 122, 109, 0.12);
}

.url-row button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 132px;
  height: 46px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

.url-row button:hover {
  background: var(--accent-strong);
}

.url-row button:disabled {
  cursor: progress;
  background: #8aa1b6;
}

.source-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 18px;
  align-items: center;
  margin-top: 18px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-muted);
}

.source-panel span,
.source-panel dt {
  color: var(--muted);
  font-size: 12px;
}

.source-panel strong {
  display: block;
  margin-top: 4px;
  overflow-wrap: anywhere;
}

.source-panel dl {
  display: flex;
  gap: 18px;
  margin: 0;
}

.source-panel dd {
  margin: 4px 0 0;
  font-weight: 800;
}

.panel,
.content-preview,
.paired-panel,
.feedback-panel {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.paired-panel {
  margin-top: 24px;
}

.content-preview {
  margin-top: 18px;
}

.feedback-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 18px;
  padding: 16px 18px;
}

.feedback-panel h3 {
  margin: 0;
  font-size: 16px;
}

.feedback-panel p {
  margin: 6px 0 0;
  color: var(--muted);
  line-height: 1.5;
}

.feedback-panel button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex: 0 0 auto;
  min-width: 124px;
  height: 42px;
  border: 0;
  border-radius: 8px;
  background: var(--accent);
  color: #ffffff;
  font-weight: 700;
  cursor: pointer;
}

.feedback-panel button:disabled {
  cursor: not-allowed;
  background: #a8b5c2;
}

.feedback-panel button:not(:disabled):hover {
  background: var(--accent-strong);
}

.panel-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--line);
}

.panel-heading h3 {
  font-size: 16px;
}

.panel-heading span {
  font-size: 12px;
}

.paired-heading {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  border-bottom: 1px solid var(--line);
}

.paired-heading > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
  padding: 16px 18px;
}

.paired-heading > div:first-child {
  border-right: 1px solid var(--line);
}

.paired-heading h3 {
  margin: 0;
  font-size: 16px;
}

.paired-heading span {
  color: var(--muted);
  font-size: 12px;
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 220px;
  padding: 24px;
  color: var(--muted);
  text-align: center;
}

.empty-state svg {
  width: 34px;
  height: 34px;
  margin-bottom: 10px;
  color: #8aa1b6;
}

.empty-state p {
  max-width: 320px;
  margin: 0;
  line-height: 1.65;
}

.paired-result-list {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.paired-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 12px;
  align-items: stretch;
}

.risk-item,
.suggestion-item {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfcfd;
}

.risk-item,
.suggestion-item {
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.risk-title,
.suggestion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 8px;
}

.risk-title strong,
.suggestion-title strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.badge {
  flex: 0 0 auto;
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 700;
}

.badge.high {
  background: rgba(184, 50, 50, 0.12);
  color: var(--danger);
}

.badge.medium {
  background: rgba(184, 100, 24, 0.13);
  color: var(--warning);
}

.badge.low {
  background: rgba(33, 118, 77, 0.12);
  color: var(--ok);
}

.risk-item p,
.suggestion-item p {
  margin: 0;
  color: #465465;
  line-height: 1.65;
  overflow-wrap: anywhere;
}

.risk-item .category {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
}

.replacement {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  background: var(--surface-muted);
  color: #344251;
  line-height: 1.65;
}

.guideline-box {
  width: 100%;
  margin-top: 14px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfd;
  color: #465465;
  text-align: left;
}

.guideline-box strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
}

.guideline-box ul {
  margin: 0;
  padding-left: 18px;
  line-height: 1.75;
}

.article-body {
  display: grid;
  gap: 14px;
  padding: 16px;
}

.article-text {
  max-height: 260px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: #fbfcfd;
  color: #344251;
  line-height: 1.75;
  white-space: pre-wrap;
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(112px, 1fr));
  gap: 10px;
}

.image-grid a {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-muted);
  aspect-ratio: 1;
}

.image-grid img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

mark {
  border-radius: 4px;
  padding: 1px 3px;
  background: rgba(184, 100, 24, 0.22);
  color: inherit;
}

@media (max-width: 900px) {
  .app-shell {
    width: min(100% - 20px, 720px);
    padding: 10px 0;
  }

  .workspace,
  .paired-heading,
  .paired-row,
  .url-row,
  .source-panel,
  .feedback-panel {
    grid-template-columns: 1fr;
  }

  .feedback-panel {
    align-items: stretch;
    flex-direction: column;
  }

  .feedback-panel button {
    width: 100%;
  }

  .paired-heading > div:first-child {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .workspace {
    min-height: auto;
  }

  .side-panel,
  .main-panel {
    padding: 20px;
  }

  .rule-box {
    margin-top: 0;
  }

  .url-row button {
    width: 100%;
  }

  .source-panel dl {
    justify-content: space-between;
  }
}

@media (max-width: 560px) {
  .topbar {
    align-items: flex-start;
  }

  .topbar h2 {
    font-size: 26px;
  }

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