:root {
  --bg: #f4f1ea;
  --bg-soft: #faf8f3;
  --surface: #fffdf8;
  --surface-strong: #ffffff;
  --ink: #181715;
  --muted: #6f6b63;
  --line: #ddd8ce;
  --line-strong: #c9c1b5;
  --accent: #c65f3d;
  --accent-dark: #9d4428;
  --accent-soft: #f4e7de;
  --green-bg: #edf8ef;
  --green-line: #a9d7b3;
  --green-text: #24683a;
  --green-dark: #dcefdc;
  --red-bg: #fff0ed;
  --red-line: #eab8ae;
  --red-text: #9a3028;
  --red-dark: #80251f;
  --brown-bg: var(--accent-soft);
  --brown-line: #d6cec2;
  --brown-text: #5f574e;
  --blue-bg: #eef5fb;
  --blue-line: #c0d4e3;
  --blue-text: #315f82;
  --shadow: 0 16px 50px rgba(31, 24, 14, 0.08);
  --radius: 8px;
  --panel-radius: 14px;
  --font: "IBM Plex Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 16px;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(to right, rgba(24, 23, 21, 0.04) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(24, 23, 21, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
  content: "";
  opacity: 0.32;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.46;
}

.page-shell {
  width: min(1480px, calc(100% - 48px));
  margin: 0 auto;
  padding: 26px 0 52px;
}

.top-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  min-height: 54px;
  margin-bottom: 18px;
  padding: 0 2px;
  color: var(--muted);
  font-family: var(--font);
}

.nav-brand {
  display: flex;
  align-items: center;
  min-width: 0;
  gap: 12px;
}

.top-nav strong {
  color: var(--ink);
  font-size: 18px;
  font-weight: 700;
  white-space: nowrap;
}

.nav-brand span {
  padding-left: 12px;
  border-left: 1px solid var(--line-strong);
  white-space: nowrap;
}

.nav-quote {
  max-width: 520px;
  margin: 0;
  color: #514d46;
  font-family: "Tiempos Text", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  font-size: 16px;
  font-style: italic;
  font-weight: 400;
  line-height: 1.45;
  text-align: right;
}

.nav-quote cite {
  color: var(--muted);
  font-style: normal;
}

.brand-mark {
  position: relative;
  width: 28px;
  height: 28px;
}

.brand-mark::before,
.brand-mark::after {
  position: absolute;
  inset: 12px 2px;
  border-radius: 2px;
  background: var(--accent);
  content: "";
}

.brand-mark::after {
  transform: rotate(90deg);
}

.app-header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 620px);
  gap: 40px;
  align-items: end;
  margin-bottom: 28px;
}

.app-header h1,
.review-toolbar h2 {
  margin: 0;
  font-weight: 500;
  letter-spacing: 0;
}

.app-header h1 {
  max-width: none;
  font-size: clamp(42px, 5vw, 72px);
  line-height: 0.95;
  white-space: nowrap;
}

.review-toolbar h2 {
  font-size: 22px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-link {
  text-transform: none;
  font-size: 20px;
}

.header-note {
  justify-self: end;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: clamp(22px, 2vw, 30px);
  line-height: 1.35;
  text-align: right;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 392px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.control-panel,
.review-panel {
  font-family: var(--serif);
}

.diff-list,
.empty-state,
.change-card {
  font-family: var(--font);
}

.control-panel,
.review-panel {
  border: 1px solid var(--line);
  border-radius: var(--panel-radius);
  background: rgba(255, 253, 248, 0.92);
  box-shadow: var(--shadow);
}

.control-panel {
  position: sticky;
  top: 18px;
  padding: 18px;
}

.review-panel {
  min-height: 690px;
  overflow: hidden;
}

.revision-form {
  display: grid;
  gap: 18px;
}

.field-group {
  display: grid;
  gap: 8px;
}

.field-group > label {
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
}

.drop-zone {
  display: grid;
  gap: 8px;
  min-height: 104px;
  padding: 16px;
  border: 1.5px dashed var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--muted);
  place-items: center;
  text-align: center;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.drop-zone:hover,
.drop-zone.is-dragging,
.drop-zone.is-ready {
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
}

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

.drop-title {
  color: var(--ink);
  font-size: 18px;
  font-weight: 800;
}

.drop-detail {
  max-width: 100%;
  overflow-wrap: anywhere;
  line-height: 1.45;
}

textarea,
input[type="password"] {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--ink);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

textarea {
  min-height: 115px;
  padding: 13px 14px;
  line-height: 1.65;
  resize: vertical;
}

input[type="password"] {
  height: 44px;
  padding: 0 12px;
}

textarea:focus,
input[type="password"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(198, 95, 61, 0.16);
}

.primary-button,
.secondary-button,
.tiny-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: 1px solid transparent;
  white-space: nowrap;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.primary-button {
  min-height: 46px;
  padding: 0 18px;
  background: var(--ink);
  color: #ffffff;
  font-weight: 800;
}

.primary-button:not(:disabled):hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.secondary-button {
  min-height: 40px;
  padding: 0 14px;
  border-color: var(--line);
  background: var(--surface-strong);
  color: var(--ink);
  font-weight: 800;
}

.secondary-button:not(:disabled):hover,
.tiny-button:not(:disabled):hover {
  transform: translateY(-1px);
}

.keep-button {
  border-color: var(--green-line);
  color: var(--green-text);
}

.keep-button:not(:disabled):hover,
.keep-button.is-active {
  border-color: var(--green-line);
  background: var(--green-dark);
  color: var(--green-text);
}

.discard-button {
  border-color: var(--brown-line);
  color: var(--brown-text);
}

.discard-button:not(:disabled):hover,
.discard-button.is-active {
  border-color: var(--brown-line);
  background: var(--brown-bg);
  color: var(--brown-text);
}

.tiny-button {
  min-height: 34px;
  padding: 0 12px;
  border-color: var(--line);
  background: var(--surface-strong);
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
}

.accept-button {
  border-color: var(--green-line);
  color: var(--green-text);
}

.accept-button.is-active {
  border-color: var(--green-line);
  background: var(--green-dark);
  color: var(--green-text);
}

.reject-button {
  border-color: var(--brown-line);
  color: var(--brown-text);
}

.reject-button.is-active {
  border-color: var(--brown-line);
  background: var(--brown-bg);
  color: var(--brown-text);
}

.status-panel {
  display: grid;
  gap: 12px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.status-line,
.progress-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.status-label,
.progress-head span {
  color: var(--muted);
}

.status-line strong,
.progress-head strong {
  text-align: right;
}

.progress-panel {
  display: grid;
  gap: 8px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-soft);
}

.progress-head {
  align-items: center;
  font-size: 13px;
}

.progress-track {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #ebe5db;
}

.progress-track span {
  display: block;
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: var(--accent);
  transition: width 420ms ease;
}

.doc-stats {
  min-height: 22px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.review-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  background: rgba(250, 248, 243, 0.92);
}

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 10px;
}

.empty-state {
  display: grid;
  min-height: 590px;
  padding: 28px;
  color: var(--muted);
  line-height: 1.7;
  place-items: center;
  text-align: center;
}

.empty-state p {
  max-width: 520px;
  margin: 0;
}

.diff-list {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.change-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  overflow: hidden;
  transition: opacity 160ms ease, border-color 160ms ease, box-shadow 160ms ease;
}

.change-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 10px 28px rgba(31, 24, 14, 0.06);
}

.change-card.is-rejected {
  opacity: 0.74;
}

.change-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: #fffefa;
}

.change-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.45;
}

.pill {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  padding: 0 9px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.pill-accept {
  border: 1px solid var(--green-line);
  background: var(--green-bg);
  color: var(--green-text);
}

.pill-reject {
  border: 1px solid var(--red-line);
  background: var(--red-bg);
  color: var(--red-text);
}

.change-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: end;
  gap: 8px;
}

.diff-body {
  display: grid;
  gap: 0;
  padding: 0;
  overflow-x: auto;
}

.diff-line {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  min-width: 0;
  border-bottom: 1px solid rgba(222, 216, 206, 0.72);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 14px;
  line-height: 1.7;
}

.diff-line:last-child {
  border-bottom: 0;
}

.diff-mark {
  display: flex;
  align-items: start;
  justify-content: center;
  padding: 9px 0;
  color: var(--muted);
  user-select: none;
}

.diff-text {
  min-width: 0;
  padding: 9px 14px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.diff-line.delete {
  background: var(--red-bg);
}

.diff-line.delete .diff-mark,
.diff-line.delete .diff-text {
  color: var(--red-text);
}

.diff-line.insert {
  background: var(--green-bg);
}

.diff-line.insert .diff-mark,
.diff-line.insert .diff-text {
  color: var(--green-text);
}

.inline-delete,
.inline-insert {
  border-radius: 4px;
  padding: 1px 2px;
}

.inline-delete {
  background: rgba(234, 184, 174, 0.58);
  text-decoration: line-through;
}

.inline-insert {
  background: rgba(169, 215, 179, 0.66);
}

.reason {
  padding: 10px 16px 14px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.message {
  margin-top: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-strong);
  color: var(--muted);
  line-height: 1.6;
}

.message.is-error {
  border-color: var(--red-line);
  background: var(--red-bg);
  color: var(--red-text);
}

@media (max-width: 1060px) {
  .app-header,
  .workspace {
    grid-template-columns: 1fr;
  }

  .app-header h1 {
    white-space: normal;
  }

  .control-panel {
    position: static;
  }
}

@media (max-width: 680px) {
  .page-shell {
    width: min(100% - 24px, 1480px);
    padding-top: 18px;
  }

  .top-nav {
    align-items: flex-start;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 22px;
  }

  .nav-brand span {
    display: none;
  }

  .nav-quote {
    max-width: 100%;
    text-align: left;
  }

  .app-header,
  .review-toolbar,
  .change-head {
    align-items: stretch;
    flex-direction: column;
  }

  .app-header {
    display: flex;
  }

  .toolbar-actions,
  .change-actions {
    justify-content: stretch;
  }

  .toolbar-actions > button,
  .change-actions > button {
    flex: 1 1 0;
  }

  .review-panel {
    min-height: 0;
  }

  .empty-state {
    min-height: 360px;
  }
}