:root {
  --bg: #f5f0e8;
  --bg-deep: #eee4d8;
  --ink: #2f2a23;
  --ink-soft: #5c5145;
  --accent: #c46b2b;
  --accent-2: #2b6f6b;
  --paper: #ffffff;
  --stroke: #e2d7c9;
  --shadow: 0 16px 40px rgba(44, 36, 28, 0.08);
  --radius: 18px;
  --radius-sm: 12px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "San Francisco", "Helvetica Neue", "Noto Sans CJK SC", "Noto Sans CJK", "Source Han Sans", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f8fafc;
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.wrap {
  width: min(1200px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(245, 240, 232, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--stroke);
}

.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid var(--stroke);
}

.site-nav {
  display: flex;
  gap: 18px;
  font-size: 15px;
}

.site-nav a {
  padding: 6px 8px;
  border-radius: 10px;
}

.site-nav a:hover {
  background: var(--paper);
  box-shadow: var(--shadow);
}

.site-actions {
  display: flex;
  gap: 10px;
}

.primary,
.ghost {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  border: 1px solid var(--stroke);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.primary {
  background: var(--accent);
  color: #fff;
  border-color: transparent;
}

.ghost {
  background: transparent;
  color: var(--ink);
}

.primary:hover,
.ghost:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}

.site-main {
  padding: 40px 0 80px;
}

.breadcrumb {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

.breadcrumb a {
  color: #8a4f1f;
}

.breadcrumb .sep {
  color: #b39a7f;
}

.hero {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 32px;
  align-items: center;
  background: var(--paper);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
  border: 1px solid var(--stroke);
}

.hero h1 {
  font-size: clamp(28px, 3.4vw, 42px);
  margin: 0 0 12px;
}

.hero p {
  color: var(--ink-soft);
  line-height: 1.7;
}

.hero .cta {
  display: flex;
  gap: 12px;
  margin-top: 18px;
}

.section {
  margin-top: 40px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
}

.section-title h2 {
  margin: 0;
  font-size: 22px;
}

.section-title a {
  font-size: 14px;
  color: var(--accent-2);
}

.grid {
  display: grid;
  gap: 18px;
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

.card {
  background: var(--paper);
  border-radius: var(--radius-sm);
  padding: 18px;
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
  transition: transform 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
}

.card h3 {
  margin: 0 0 10px;
  font-size: 18px;
}

.card p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.6;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: #f4e7d6;
  color: #8a4f1f;
  font-size: 12px;
}

.list {
  display: grid;
  gap: 14px;
}

.list-item {
  padding: 16px;
  border-radius: var(--radius-sm);
  background: var(--paper);
  border: 1px solid var(--stroke);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Grade/detail pages need vertical flow */
body[data-page="grade"] .list-item,
body[data-page="my-grade"] .list-item {
  display: block;
}

body[data-page="grade"] .list-item .meta,
body[data-page="my-grade"] .list-item .meta {
  display: block;
  margin-top: 6px;
  white-space: normal;
}

body[data-page="grade"] .grade-card-ok {
  border-color: #9ad7a8;
  background: #f3fbf5;
}

body[data-page="grade"] .grade-card-bad {
  border-color: #efb1b1;
  background: #fff6f6;
}

/* Wrong list should use vertical flow */
body[data-page="wrong"] .list-item {
  display: block;
}

body[data-page="wrong"] .list-item .meta {
  display: block;
  margin-top: 6px;
  white-space: normal;
}

body[data-page="wrong"] .list-item .badge {
  display: inline-flex;
  margin-top: 8px;
}

body[data-page="my-grade"] #myGradeList a,
body[data-page="my-grade"] #myGradeList a:hover,
body[data-page="my-grade"] #myGradeList a:focus,
body[data-page="my-grade"] #myGradeList a:active,
body[data-page="my-grade"] #myGradeList a:visited {
  text-decoration: none !important;
}

/* Train page should render question + feedback in vertical flow */
body[data-page="train-page"] .list-item {
  display: block;
}

body[data-page="train-page"] .list-item > div {
  width: 100%;
}

body[data-page="train-page"] .list-item .meta {
  display: block;
  margin-top: 6px;
  white-space: normal;
}

body[data-page="train-page"] .train-feedback {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--stroke);
}

.list-item .meta {
  color: var(--ink-soft);
  font-size: 13px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--accent-2);
  color: #fff;
  font-size: 14px;
  border: 0;
}

.btn.secondary {
  background: #e8d8c3;
  color: #6a4120;
}

.panel {
  background: var(--paper);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--stroke);
  box-shadow: var(--shadow);
}

.panel h2 {
  margin-top: 0;
}

.content {
  line-height: 1.8;
  color: var(--ink-soft);
}

.content img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 16px;
}

.input {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: #fff;
  font-size: 15px;
}

.site-footer {
  padding: 36px 0;
  border-top: 1px solid var(--stroke);
  background: #efe6d7;
}

.site-footer .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.footer-links {
  display: flex;
  gap: 16px;
  font-size: 14px;
}

.muted {
  color: var(--ink-soft);
  font-size: 13px;
}

.train-feedback {
  margin-top: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--stroke);
}

.train-card-ok {
  border-color: #9ad7a8;
  background: #f3fbf5;
}

.train-card-bad {
  border-color: #efb1b1;
  background: #fff6f6;
}

.feedback-ok {
  color: #1f7a39;
  font-weight: 600;
}

.feedback-bad {
  color: #a23a28;
  font-weight: 600;
}

.feedback-pill {
  display: inline-flex !important;
  align-items: center;
  padding: 4px 10px;
  border-radius: 999px;
  background: #ecf5ff;
  margin-bottom: 6px;
}

.judge-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  margin-left: 6px;
  border-radius: 50%;
  font-size: 12px;
  line-height: 1;
}

.judge-ok {
  color: #fff;
  background: #1f7a39;
}

.judge-bad {
  color: #fff;
  background: #a23a28;
}

.feedback-label {
  display: inline-flex;
  align-items: center;
  padding: 2px 8px;
  border-radius: 999px;
  background: #ece5d8;
  color: #5a4d3e;
  font-size: 12px;
  margin-right: 6px;
}

.feedback-value {
  color: #2f2a23;
}

.hero-ill {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--stroke);
  background: linear-gradient(135deg, #f5e3c8, #e7f1ee);
  min-height: 260px;
  display: grid;
  place-items: center;
  color: #7a4b22;
  font-size: 18px;
}

.pagination {
  margin-top: 20px;
  display: flex;
  justify-content: center;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  padding: 6px 12px;
  border: 1px solid #3061fd;
  margin: 0 4px;
  border-radius: 8px;
  background: #fff;
  color: #3061fd;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.pagination a:hover,
.pagination a:focus {
  background: #eef3ff;
  border-color: #244fe6;
  color: #244fe6;
  text-decoration: none;
}

.pagination .active {
  background: #3061fd;
  color: #fff;
  border-color: #3061fd;
}

.cate-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cate-inline {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  margin: 6px 0 12px;
}

.cate-icon {
  width: 14px;
  height: 14px;
  margin-top: 6px;
  border-radius: 3px;
  border: 1px solid #d8c2a6;
  background: linear-gradient(135deg, #c46b2b 40%, #ffffff 40%);
}

.cate-inline-title {
  margin-top: 4px;
  color: #3e4e74;
  font-size: 12px;
  line-height: 1.6;
}

.cate-inline-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.cate-tab {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 2px;
  border: 1px solid #d9c5ad;
  background: #fff;
  color: #6e4d2e;
  font-size: 12px;
  line-height: 1.35;
  text-decoration: none;
}

.cate-tab.active {
  background: #c46b2b;
  color: #fff;
  border-color: #c46b2b;
}

.cate-tab:hover {
  background: #f4e7d6;
  border-color: #c46b2b;
  color: #8a4f1f;
  text-decoration: none;
}

.cate-tab:focus,
.cate-tab:active,
.cate-tab:visited {
  text-decoration: none;
}

.cate-reset {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 2px;
  border: 1px dashed #d9c5ad;
  background: #fff;
  color: #8a6a4b;
  font-size: 12px;
  line-height: 1.35;
}

.cate-reset.active {
  border-style: solid;
  border-color: #c46b2b;
  color: #8a4f1f;
  font-weight: 600;
}

body[data-page="paper-detail"] .list-item {
  display: block;
}

body[data-page="paper-detail"] .list-item .meta {
  display: block;
  margin-top: 6px;
  white-space: normal;
}

.paper-detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 20px;
  align-items: start;
}

.paper-detail-crumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 13px;
}

.paper-detail-main h2 {
  margin-bottom: 14px;
}

.paper-mode-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
}

.paper-mode-tab {
  border: 1px solid var(--stroke);
  background: #fff;
  color: var(--ink);
  border-radius: 8px;
  padding: 8px 14px;
  font-size: 14px;
  cursor: pointer;
}

.paper-mode-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.paper-mode-panel {
  min-height: 140px;
}

.paper-mode-hidden {
  display: none;
}

body[data-page="paper-detail"] .paper-mode-hidden {
  display: none !important;
}

.paper-mock-toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 12px;
}

.paper-countdown-item {
  margin-bottom: 12px;
}

.paper-practice-answer {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--stroke);
}

.paper-side-cover {
  border-radius: 12px;
  border: 1px solid var(--stroke);
  margin-bottom: 12px;
}

.paper-detail-side h3 {
  margin: 0 0 12px;
}

.paper-meta-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid #efe4d7;
  color: var(--ink-soft);
  font-size: 14px;
}

.paper-meta-line strong {
  color: var(--ink);
}

.paper-kind-summary {
  margin-top: 12px;
  line-height: 1.7;
  background: #f3f3f3;
  border: 1px solid #e1e1e1;
  padding: 10px 12px;
}

.paper-question-nav {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.paper-question-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--stroke);
  background: #fff;
  color: var(--ink-soft);
  font-size: 12px;
}

.paper-question-nav a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.paper-question-nav a.answered {
  background: #f4e7d6;
  border-color: #d6b18d;
  color: #8a4f1f;
  font-weight: 600;
}

.paper-question-nav a.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.paper-question-nav a.nav-ok {
  background: #eaf7ee;
  border-color: #8ecb9c;
  color: #2f7f44;
}

.paper-question-nav a.nav-bad {
  background: #fff0f0;
  border-color: #e8aaaa;
  color: #b24545;
}

.paper-question-nav a.nav-empty {
  background: #f5f5f5;
  border-color: #dddddd;
  color: #888;
}

.paper-no-login {
  display: block !important;
}

.paper-login-tip {
  display: flex !important;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.paper-login-tip .primary {
  margin-top: 0;
}

.paper-grade-side {
  margin-top: 10px;
  border-top: 1px solid #efe4d7;
  padding-top: 8px;
}

.paper-recent-title {
  margin-top: 10px;
  margin-bottom: 6px;
  font-weight: 600;
  color: var(--ink);
}

.paper-recent-list {
  display: grid;
  gap: 6px;
}

.paper-recent-list a {
  display: block;
  padding: 6px 8px;
  border: 1px solid var(--stroke);
  border-radius: 6px;
  font-size: 13px;
  color: #3f6cab;
  background: #fff;
}

.paper-recent-list a.active {
  background: #e9f0fb;
  border-color: #9fb8df;
  color: #2f5eaa;
  font-weight: 600;
}

.paper-grade-actions {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.paper-grade-action-btn {
  display: inline-block;
  padding: 8px 10px;
  border-radius: 4px;
  background: #3061fd;
  color: #fff !important;
  text-align: center;
  font-size: 13px;
  line-height: 1;
}

.paper-grade-action-btn:hover {
  background: #1f49d8;
  color: #fff !important;
  text-decoration: none;
}

.paper-grade-card {
  border: 1px solid var(--stroke);
  border-radius: 8px;
  padding: 14px;
  margin-bottom: 14px;
  background: #fff;
}

.paper-grade-options {
  margin-top: 10px;
  display: grid;
  gap: 8px;
  max-width: 520px;
}

.paper-grade-option {
  border: 1px solid #d9d9d9;
  border-radius: 4px;
  padding: 8px 10px;
  background: #fafafa;
}

.paper-grade-option.user-picked {
  border-color: #6e99e6;
  background: #eef4ff;
}

.paper-grade-result {
  margin-top: 10px;
  font-weight: 600;
}

@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
  }
  .grid-3 {
    grid-template-columns: 1fr 1fr;
  }
  .site-header .wrap {
    flex-wrap: wrap;
  }
  .site-nav {
    flex-wrap: wrap;
  }
  .cate-inline {
    display: block;
  }
  .cate-inline-title {
    display: inline-block;
    margin-bottom: 6px;
  }
  .paper-detail-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
  .site-actions {
    width: 100%;
    justify-content: flex-start;
  }
  .list-item {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* paper_detail dotcpp-like strict tuning */
body[data-page="paper-detail"] .content_box_w {
  border: 1px solid #ddd;
  border-radius: 0;
  box-shadow: none;
}

body[data-page="paper-detail"] .head_box_w {
  padding: 14px 20px 0;
  border-bottom: 1px solid #ddd;
}

body[data-page="paper-detail"] .head_box_text_w {
  margin: 0;
  vertical-align: bottom;
}

body[data-page="paper-detail"] .head_box_text_w h1 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.5;
}

body[data-page="paper-detail"] .row_right .head_box_w {
  padding: 14px 0 0;
}

body[data-page="paper-detail"] .row_right .head_box_text_w {
  margin: 0 7px;
}

body[data-page="paper-detail"] .head_wbox_tabs {
  border-bottom: 1px solid #ddd;
  padding: 12px 20px;
}

body[data-page="paper-detail"] .paper-mode-tab {
  border: 1px solid #ddd;
  border-radius: 0;
  background: #f5f5f5;
  color: #333;
  padding: 8px 18px;
  font-size: 15px;
  line-height: 1.2;
}

body[data-page="paper-detail"] .paper-mode-tab.active {
  background: #3061fd;
  border-color: #3061fd;
  color: #fff;
}

body[data-page="paper-detail"] .paper-detail-body {
  padding: 18px 20px 24px;
}

body[data-page="paper-detail"] .list {
  gap: 14px;
}

body[data-page="paper-detail"] .paper-kind-section {
  display: flex;
  align-items: center;
  padding: 14px 18px;
  border: 1px solid #ddd;
  background: #fff;
  color: #333;
  font-size: 18px;
  font-weight: 700;
}

body[data-page="paper-detail"] .paper-kind-section::before {
  content: "";
  width: 4px;
  height: 24px;
  margin-right: 12px;
  background: #3061fd;
  border-radius: 2px;
}

body[data-page="paper-detail"] .list-item {
  border: 1px solid #ddd;
  border-radius: 0;
  padding: 18px 24px;
  background: rgba(245, 245, 245, 0.9);
}

body[data-page="paper-detail"] .list-item > div strong {
  font-size: 18px;
}

body[data-page="paper-detail"] .paper-option-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

body[data-page="paper-detail"] .paper-option-item {
  display: inline-block;
  width: auto;
  max-width: 100%;
  margin-top: 0;
  border: 1px solid #d7d7d7;
  background: #fff;
  min-height: 0;
  line-height: 1.35;
  padding: 5px 12px;
  font-size: 14px;
  font-weight: 400;
  cursor: pointer;
  white-space: normal;
  word-break: break-word;
}

body[data-page="paper-detail"] .paper-option-item.is-selected {
  border-color: #9cb2ff;
  background: #f6f8ff;
  color: #333;
}

body[data-page="paper-detail"] .paper-option-item input[type="radio"],
body[data-page="paper-detail"] .paper-option-item input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

body[data-page="paper-detail"] .paper-meta-line {
  border-bottom: 1px solid #ddd;
  padding: 12px 0;
  font-size: 13px;
}

body[data-page="paper-detail"] .btn {
  background: #3061fd;
  border-color: #3061fd;
  color: #fff;
}

body[data-page="paper-detail"] .primary {
  background: #3061fd;
  border-color: #3061fd;
  color: #fff;
}

body[data-page="paper-detail"] .btn:hover,
body[data-page="paper-detail"] .btn:focus {
  background: #244fe6;
  border-color: #244fe6;
  color: #fff;
}

body[data-page="paper-detail"] .primary:hover,
body[data-page="paper-detail"] .primary:focus {
  background: #244fe6;
  border-color: #244fe6;
  color: #fff;
}

body[data-page="paper-detail"] .paper-answer-toggle {
  min-width: 96px;
  height: 34px;
  padding: 0 16px;
  border: 1px solid #cfcfcf;
  border-radius: 0;
  background: #fff;
  color: #333;
  font-size: 14px;
  line-height: 32px;
}

body[data-page="paper-detail"] .paper-answer-toggle:hover,
body[data-page="paper-detail"] .paper-answer-toggle:focus {
  background: #fff;
  border-color: #cfcfcf;
  color: #333;
}

body[data-page="paper-detail"] .paper-question-actions {
  margin-top: 14px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

body[data-page="paper-detail"] .paper-question-score {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  color: #555;
  font-size: 14px;
  line-height: 1;
}

body[data-page="paper-detail"] #paperPracticeSection > .paper-mock-toolbar {
  justify-content: center;
}

body[data-page="paper-detail"] .list-item img,
body[data-page="paper-detail"] .paper-practice-answer img,
body[data-page="paper-detail"] .paper-grade-card img {
  max-width: 100% !important;
  height: auto !important;
}

body[data-page="paper-detail"] .list-item table:not(.syntaxhighlighter),
body[data-page="paper-detail"] .paper-practice-answer table:not(.syntaxhighlighter),
body[data-page="paper-detail"] .paper-grade-card table:not(.syntaxhighlighter) {
  display: block;
  width: 100% !important;
  max-width: 100% !important;
  overflow-x: auto;
}

/* Editor-like code block with line numbers for question titles/content */
pre.code-with-lines {
  position: relative;
  margin: 8px 0;
  padding: 10px 12px 10px 56px;
  border: 1px solid #d7d7d7;
  background: #f1f3f8;
  border-radius: 3px;
  white-space: pre;
  overflow-x: auto;
  line-height: 1.6;
  font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
  font-size: 15px;
}

pre.code-with-lines::before {
  content: attr(data-line-numbers);
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 42px;
  padding: 10px 8px 10px 0;
  border-right: 1px solid #d7dbe8;
  background: #e8ebf3;
  color: #9ca3af;
  text-align: right;
  white-space: pre;
  line-height: 1.6;
  pointer-events: none;
  user-select: none;
}

pre.code-with-lines code {
  display: block;
  white-space: inherit;
  word-break: normal;
}

body[data-page="paper-detail"] table.syntaxhighlighter {
  display: table !important;
  margin-top: 12px !important;
  overflow: visible !important;
}

body[data-page="paper-detail"] table.syntaxhighlighter,
body[data-page="paper-detail"] table.syntaxhighlighter td.code,
body[data-page="paper-detail"] table.syntaxhighlighter td.code .container,
body[data-page="paper-detail"] table.syntaxhighlighter td.code .line.alt1,
body[data-page="paper-detail"] table.syntaxhighlighter td.code .line.alt2 {
  background: #eff0f7 !important;
}

body[data-page="paper-detail"] table.syntaxhighlighter .gutter {
  background-color: #f7f7f9 !important;
}

body[data-page="paper-detail"] table.syntaxhighlighter .gutter .line {
  background: #f7f7f9 !important;
}

body[data-page="paper-detail"] table.syntaxhighlighter td.gutter,
body[data-page="paper-detail"] table.syntaxhighlighter td.code {
  vertical-align: top !important;
}

body[data-page="paper-detail"] table.syntaxhighlighter td.code {
  padding: 9.5px 0 !important;
}

body[data-page="paper-detail"] .row_right .head_box_text_w h2 {
  font-size: 18px;
  font-weight: 700;
  text-align: left;
}

/* Keep right paper info panel visible in viewport (desktop) without overlapping footer */
@media (min-width: 1200px) {
  body[data-page="paper-detail"] .row_right .content_box_w {
    position: sticky !important;
    top: 94px !important;
    right: auto !important;
    width: auto !important;
    max-height: none !important;
    overflow: visible !important;
  }
}

body[data-page="paper-detail"] .paper-question-nav a {
  width: auto;
  min-width: 48px;
  height: 28px;
  padding: 0 6px;
  border-radius: 0;
  font-size: 12px;
  background: #bfbfbf;
  color: #fff;
  border: 1px solid #bfbfbf;
}

body[data-page="paper-detail"] .paper-question-nav a.answered {
  background: #3061fd;
  border-color: #3061fd;
  color: #fff;
}

body[data-page="paper-detail"] .paper-question-nav a.active {
  background: #1f49d8;
  border-color: #1f49d8;
  color: #fff;
}

body[data-page="paper-detail"] .paper-question-nav a.nav-ok {
  background: #4caf50;
  border-color: #4caf50;
  color: #fff;
}

body[data-page="paper-detail"] .paper-question-nav a.nav-bad {
  background: #ef5350;
  border-color: #ef5350;
  color: #fff;
}

body[data-page="paper-detail"] .paper-question-nav a.nav-empty {
  background: #bfbfbf;
  border-color: #bfbfbf;
  color: #fff;
}

@media (max-width: 767px) {
  body[data-page="paper-detail"] .row_detail,
  body[data-page="paper-detail"] .row_right {
    float: none !important;
    width: 100% !important;
  }

  body[data-page="paper-detail"] .position_nav {
    padding: 10px 12px;
    font-size: 13px;
    line-height: 1.7;
    word-break: break-all;
  }

  body[data-page="paper-detail"] .head_box_w {
    padding: 12px 14px 0;
  }

  body[data-page="paper-detail"] .head_box_text_w {
    margin: 0 14px;
    padding: 12px 0 10px;
    vertical-align: bottom;
  }

  body[data-page="paper-detail"] .head_box_text_w h1 {
    font-size: 20px;
  }

  body[data-page="paper-detail"] .row_right .head_box_w {
    padding: 12px 0 0;
  }

  body[data-page="paper-detail"] .row_right .head_box_text_w {
    margin: 0 14px;
  }

  body[data-page="paper-detail"] .row_right .head_box_text_w h2 {
    font-size: 18px;
  }

  body[data-page="paper-detail"] .head_wbox_tabs {
    display: flex;
    gap: 8px;
    overflow-x: auto;
    white-space: nowrap;
    padding: 10px 12px;
  }

  body[data-page="paper-detail"] .paper-mode-tab {
    flex: none;
    padding: 8px 14px;
    font-size: 14px;
  }

  body[data-page="paper-detail"] .paper-detail-body {
    padding: 12px 12px 16px;
  }

  body[data-page="paper-detail"] .list-item {
    padding: 14px 14px 16px;
  }

  body[data-page="paper-detail"] .paper-kind-section {
    padding: 12px 14px;
    font-size: 16px;
  }

  body[data-page="paper-detail"] .paper-kind-section::before {
    height: 20px;
    margin-right: 10px;
  }

  body[data-page="paper-detail"] .paper-option-item {
    width: auto;
    max-width: 100%;
    padding: 5px 10px;
    font-size: 14px;
  }

  body[data-page="paper-detail"] .paper-mock-toolbar {
    align-items: stretch;
  }

  body[data-page="paper-detail"] .paper-mock-toolbar .btn {
    width: 100%;
  }

  body[data-page="paper-detail"] .div_padding_sm {
    padding: 10px 14px 16px;
  }

  body[data-page="paper-detail"] .paper-side-cover {
    margin: 12px 14px 0;
  }

  body[data-page="paper-detail"] .paper-grade-action-btn,
  body[data-page="paper-detail"] .ghost {
    display: block;
    width: 100%;
    text-align: center;
  }

  body[data-page="paper-detail"] pre.code-with-lines {
    padding: 8px 10px 8px 50px;
    font-size: 12px;
  }

  body[data-page="paper-detail"] pre.code-with-lines::before {
    width: 38px;
    padding: 8px 8px 8px 0;
  }

  body[data-page="paper-detail"] table.syntaxhighlighter,
  body[data-page="paper-detail"] table.syntaxhighlighter td,
  body[data-page="paper-detail"] table.syntaxhighlighter code,
  body[data-page="paper-detail"] table.syntaxhighlighter div {
    font-size: 12px !important;
  }
}