:root {
  --ct-primary: #2aab98;
  --ct-primary-soft: #e8f7f4;
  --ct-primary-hover: #239e8c;
  --ct-accent: #5ec4b6;
  --ct-bg: #f6f8fb;
  --ct-surface: #ffffff;
  --ct-text: #1a2332;
  --ct-text-muted: #6b7a90;
  --ct-text-light: #94a3b8;
  --ct-border: rgba(26, 35, 50, 0.06);
  --ct-shadow-sm: 0 2px 8px rgba(26, 35, 50, 0.04);
  --ct-shadow: 0 8px 30px rgba(26, 35, 50, 0.06);
  --ct-shadow-hover: 0 16px 40px rgba(26, 35, 50, 0.1);
  --ct-radius: 1rem;
  --ct-radius-lg: 1.25rem;
  --ct-font: "Plus Jakarta Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --ct-blue: #2aab98;
  --ct-green: #34c759;
  --ct-purple: #a78bfa;
  --ct-orange: #f5a623;
  --ct-red: #ef4444;
  --ct-cyan: #5ec4b6;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  font-size: 15px;
  scroll-behavior: smooth;
}

@media (min-width: 992px) { html { font-size: 16px; } }

body {
  margin: 0;
  font-family: var(--ct-font);
  background: var(--ct-bg);
  color: var(--ct-text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* Icons */
.ct-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.35rem;
  height: 1.35rem;
}

.ct-icon svg {
  width: 100%;
  height: 100%;
}

.card-icon-wrap .ct-icon,
.feature-icon .ct-icon,
.tool-icon .ct-icon {
  width: 1.5rem;
  height: 1.5rem;
}

.icon-blue { color: var(--ct-blue); background: rgba(42, 171, 152, 0.12); }
.icon-green { color: #2db87a; background: rgba(52, 199, 89, 0.1); }
.icon-purple { color: #8b72e8; background: rgba(167, 139, 250, 0.12); }
.icon-orange { color: #e8940a; background: rgba(245, 166, 35, 0.12); }
.icon-red { color: #dc3c3c; background: rgba(239, 68, 68, 0.12); }
.icon-cyan { color: var(--ct-cyan); background: rgba(94, 196, 182, 0.12); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1030;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--ct-border);
}

.site-header .navbar {
  padding: 0.75rem 0;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ct-text) !important;
  letter-spacing: -0.02em;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  flex-shrink: 0;
  border-radius: 0.55rem;
  background: linear-gradient(145deg, #2aab98 0%, #5ec4b6 100%);
  font-weight: 700;
  font-size: 1.05rem;
  color: #fff;
  letter-spacing: -0.02em;
  line-height: 1;
  box-shadow: 0 2px 8px rgba(42, 171, 152, 0.28);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.navbar-brand:hover .brand-mark {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(42, 171, 152, 0.35);
}

.lang-switcher {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
}

.footer-lang {
  margin-top: 0.25rem;
}

.lang-link {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ct-text-muted);
  text-decoration: none;
  padding: 0.2rem 0.35rem;
  border-radius: 0.35rem;
  transition: color 0.2s, background 0.2s;
}

.lang-link:hover {
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.lang-link.active {
  color: var(--ct-primary);
}

.lang-divider {
  color: var(--ct-text-light);
  font-size: 0.75rem;
  user-select: none;
}

.site-header .nav-link {
  color: var(--ct-text-muted) !important;
  font-weight: 500;
  font-size: 0.9rem;
  padding: 0.4rem 0.75rem !important;
  border-radius: 0.5rem;
  transition: color 0.2s, background 0.2s;
}

.site-header .nav-link:hover {
  color: var(--ct-primary) !important;
  background: var(--ct-primary-soft);
}

.site-header .nav-link.active {
  color: var(--ct-primary) !important;
  background: var(--ct-primary-soft);
  font-weight: 600;
}

.navbar-toggler {
  border-color: var(--ct-border);
  padding: 0.35rem 0.55rem;
}

/* Tool search */
.navbar-tool-search {
  position: relative;
  flex: 1 1 auto;
  max-width: 360px;
  margin: 0.75rem 0;
}

@media (min-width: 992px) {
  .navbar-tool-search {
    margin: 0 1.25rem 0 0;
  }

  #mainNav {
    align-items: center;
  }
}

.tool-search-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.tool-search-icon {
  position: absolute;
  left: 0.85rem;
  width: 1rem;
  height: 1rem;
  color: var(--ct-text-light);
  pointer-events: none;
}

.tool-search-input {
  width: 100%;
  padding: 0.55rem 4.5rem 0.55rem 2.35rem;
  font-family: var(--ct-font);
  font-size: 0.875rem;
  color: var(--ct-text);
  background: var(--ct-bg);
  border: 1px solid var(--ct-border);
  border-radius: 0.65rem;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}

.tool-search-input::placeholder {
  color: var(--ct-text-light);
}

.tool-search-input:focus {
  background: var(--ct-surface);
  border-color: rgba(42, 171, 152, 0.45);
  box-shadow: 0 0 0 3px rgba(42, 171, 152, 0.12);
}

.tool-search-kbd {
  position: absolute;
  right: 0.65rem;
  padding: 0.15rem 0.45rem;
  font-size: 0.68rem;
  font-family: inherit;
  color: var(--ct-text-light);
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: 0.35rem;
  line-height: 1.4;
}

.tool-search-dropdown {
  position: absolute;
  top: calc(100% + 0.4rem);
  left: 0;
  right: 0;
  z-index: 1050;
  max-height: min(420px, 60vh);
  overflow-y: auto;
  padding: 0.35rem;
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius);
  box-shadow: var(--ct-shadow-hover);
}

.tool-search-empty {
  padding: 0.85rem 0.75rem;
  font-size: 0.875rem;
  color: var(--ct-text-muted);
  text-align: center;
}

.tool-search-item {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-rows: auto auto;
  gap: 0.1rem 0.75rem;
  padding: 0.65rem 0.75rem;
  border-radius: 0.55rem;
  text-decoration: none;
  color: inherit;
  transition: background 0.12s;
}

.tool-search-item:hover,
.tool-search-item.is-active {
  background: var(--ct-primary-soft);
}

.tool-search-item-name {
  grid-column: 1;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ct-text);
}

.tool-search-item-meta {
  grid-column: 2;
  grid-row: 1;
  align-self: center;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: 999px;
  white-space: nowrap;
}

.tool-search-item.accent-blue .tool-search-item-meta {
  color: var(--ct-blue);
  background: rgba(42, 171, 152, 0.12);
}

.tool-search-item.accent-green .tool-search-item-meta {
  color: #2db87a;
  background: rgba(52, 199, 89, 0.1);
}

.tool-search-item.accent-purple .tool-search-item-meta {
  color: #8b72e8;
  background: rgba(167, 139, 250, 0.12);
}

.tool-search-item.accent-red .tool-search-item-meta {
  color: var(--ct-red);
}

.tool-search-item.accent-orange .tool-search-item-meta {
  color: #e8940a;
  background: rgba(245, 166, 35, 0.12);
}

.tool-search-item-desc {
  grid-column: 1 / -1;
  font-size: 0.78rem;
  color: var(--ct-text-muted);
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.main-content { flex: 1; }

/* Hero — light & airy */
.hero-section {
  position: relative;
  padding: 4.5rem 0 3.5rem;
  overflow: hidden;
}

.hero-soft-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(42, 171, 152, 0.14) 0%, transparent 65%),
    radial-gradient(ellipse 50% 40% at 90% 20%, rgba(94, 196, 182, 0.1) 0%, transparent 55%),
    radial-gradient(ellipse 40% 35% at 10% 60%, rgba(167, 139, 250, 0.08) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
  padding: 0.4rem 1rem;
  border-radius: 2rem;
  margin-bottom: 1.25rem;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.025em;
  color: var(--ct-text);
  margin-bottom: 1rem;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-subtitle {
  font-size: clamp(1rem, 2vw, 1.125rem);
  color: var(--ct-text-muted);
  max-width: 580px;
  margin: 0 auto 2rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: #fff;
  background: var(--ct-primary);
  border: none;
  border-radius: 0.75rem;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(42, 171, 152, 0.3);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-hero-primary:hover {
  color: #fff;
  background: var(--ct-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(42, 171, 152, 0.35);
}

.btn-hero-outline {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.75rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ct-text);
  background: var(--ct-surface);
  border: none;
  border-radius: 0.75rem;
  text-decoration: none;
  box-shadow: var(--ct-shadow-sm);
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.btn-hero-outline:hover {
  color: var(--ct-primary);
  background: #fff;
  transform: translateY(-1px);
  box-shadow: var(--ct-shadow);
}

/* Tools section */
.tools-section {
  padding: 3rem 0 3.5rem;
}

.section-header {
  margin-bottom: 2.5rem;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 1.85rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ct-text);
  margin-bottom: 0.5rem;
}

.section-desc {
  font-size: 1rem;
  color: var(--ct-text-muted);
  margin: 0;
}

.category-card-link {
  display: block;
  text-decoration: none;
  height: 100%;
}

.category-card {
  height: 100%;
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  border: none;
}

.category-card-static {
  opacity: 0.88;
}

.category-card-link:hover .category-card {
  transform: translateY(-4px);
  box-shadow: var(--ct-shadow-hover);
}

.category-card .card-body {
  padding: 1.5rem;
}

.card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.card-icon-wrap {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.75rem;
}

.badge-status {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 2rem;
}

.badge-available {
  background: rgba(52, 199, 89, 0.12);
  color: #22a055;
}

.badge-soon {
  background: rgba(107, 122, 144, 0.1);
  color: var(--ct-text-muted);
}

.category-card .card-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ct-text);
  margin-bottom: 0.45rem;
}

.category-card .card-text {
  font-size: 0.875rem;
  color: var(--ct-text-muted);
  line-height: 1.65;
  margin-bottom: 0.85rem;
}

.card-arrow {
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--ct-primary);
}

.category-card-link:hover .card-arrow {
  text-decoration: underline;
}

/* Features */
.features-section {
  padding: 0 0 4rem;
}

.faq-section {
  position: relative;
  padding: 3.5rem 0 4rem;
  margin-bottom: 1rem;
}

.faq-section-bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(42, 171, 152, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.faq-header {
  margin-bottom: 2.25rem;
}

.faq-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
  padding: 0.35rem 0.85rem;
  border-radius: 2rem;
  margin-bottom: 0.85rem;
}

.faq-subtitle {
  max-width: 36rem;
  margin: 0.65rem auto 0;
  color: var(--ct-text-muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 1rem;
}

@media (min-width: 768px) {
  .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.15rem;
  }
}

.faq-card {
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.2s, border-color 0.2s;
}

.faq-card:hover {
  box-shadow: var(--ct-shadow);
}

.faq-card[open] {
  border-color: rgba(42, 171, 152, 0.25);
  box-shadow: var(--ct-shadow);
}

.faq-card summary {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
  font-weight: 600;
  color: var(--ct-text);
  padding: 1.15rem 1.25rem;
  list-style: none;
  line-height: 1.45;
}

.faq-card summary::-webkit-details-marker {
  display: none;
}

.faq-card summary::after {
  content: "+";
  margin-left: auto;
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
  font-weight: 700;
  font-size: 1rem;
  transition: transform 0.2s, background 0.2s;
}

.faq-card[open] summary::after {
  content: "−";
  background: var(--ct-primary);
  color: #fff;
}

.faq-q-badge {
  flex-shrink: 0;
  width: 1.65rem;
  height: 1.65rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
  font-size: 0.75rem;
  font-weight: 800;
}

.faq-card-body {
  padding: 0 1.25rem 1.15rem 3.65rem;
}

.faq-card-body p {
  margin: 0;
  color: var(--ct-text-muted);
  line-height: 1.7;
  font-size: 0.925rem;
}

/* Content pages (About / Privacy) */
.content-page {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
  padding: 2rem 2.25rem;
}

.content-section + .content-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ct-border);
}

.content-section h2 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ct-text);
  margin-bottom: 0.85rem;
}

.content-section p {
  color: var(--ct-text-muted);
  line-height: 1.75;
  margin-bottom: 0;
}

.content-list {
  color: var(--ct-text-muted);
  line-height: 1.8;
  padding-left: 1.25rem;
  margin: 0;
}

.content-list li + li {
  margin-top: 0.5rem;
}

.content-card {
  background: var(--ct-bg);
  border-radius: var(--ct-radius);
  padding: 1.25rem 1.35rem;
  height: 100%;
  border: 1px solid var(--ct-border);
}

.content-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 0.45rem;
}

.content-card p {
  font-size: 0.875rem;
  margin: 0;
}

.content-card.accent-blue h3 { color: var(--ct-blue); }
.content-card.accent-green h3 { color: var(--ct-green); }
.content-card.accent-purple h3 { color: var(--ct-purple); }
.content-card.accent-orange h3 { color: var(--ct-orange); }

/* Tool SEO block */
.tool-seo-block {
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--ct-border);
}

.tool-page-shell .tool-seo-block {
  margin-top: 1.25rem;
  padding-top: 1rem;
}

.tool-seo-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.tool-seo-title {
  font-size: clamp(1.2rem, 2.5vw, 1.5rem);
  font-weight: 700;
  color: var(--ct-text);
  margin-bottom: 0.65rem;
}

.tool-seo-lead {
  color: var(--ct-text-muted);
  line-height: 1.75;
  margin-bottom: 1.75rem;
  max-width: 52rem;
}

.tool-seo-card {
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius-lg);
  padding: 1.35rem 1.5rem;
  height: 100%;
  box-shadow: var(--ct-shadow-sm);
}

.tool-seo-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--ct-text);
  margin-bottom: 1rem;
}

.tool-seo-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.tool-seo-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.tool-seo-list li + li {
  margin-top: 1rem;
}

.tool-seo-list-icon {
  flex-shrink: 0;
  width: 1.35rem;
  height: 1.35rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
  font-size: 0.7rem;
  font-weight: 800;
  margin-top: 0.15rem;
}

.tool-seo-block.accent-green .tool-seo-list-icon {
  background: rgba(52, 199, 89, 0.12);
  color: var(--ct-green);
}

.tool-seo-list strong {
  display: block;
  font-size: 0.9rem;
  color: var(--ct-text);
  margin-bottom: 0.2rem;
}

.tool-seo-list p {
  font-size: 0.85rem;
  color: var(--ct-text-muted);
  line-height: 1.6;
  margin: 0;
}

.tool-seo-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.tool-seo-tags li {
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--ct-text);
  background: var(--ct-bg);
  border: 1px solid var(--ct-border);
  border-radius: 2rem;
  padding: 0.4rem 0.85rem;
}

.tool-seo-steps {
  padding-left: 1.2rem;
  margin: 0;
  color: var(--ct-text-muted);
  line-height: 1.75;
  font-size: 0.9rem;
}

.tool-seo-steps li + li {
  margin-top: 0.45rem;
}

.tool-seo-faq {
  margin-top: 2rem;
}

.tool-seo-faq-separated {
  margin-top: 2.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--ct-border);
  clear: both;
  position: relative;
  z-index: 1;
}

.tool-seo-faq-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.tool-seo-block .tool-seo-faq .faq-grid {
  align-items: start;
}

.tool-seo-block .tool-seo-faq .faq-card {
  align-self: start;
  width: 100%;
}

.tool-seo-card-wide {
  margin-top: 1.5rem;
  height: auto;
}

.excel-seo-panel {
  display: block;
}

.excel-seo-panel[hidden] {
  display: none !important;
}

.excel-seo-panel + .excel-seo-panel {
  margin-top: 0;
}

.excel-sql-type-info {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.excel-sql-type-info-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.85rem;
}

@media (min-width: 768px) {
  .excel-sql-type-info-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.excel-sql-type-card {
  background: var(--ct-bg);
  border: 1px solid var(--ct-border);
  border-radius: var(--ct-radius);
  padding: 1rem 1.15rem;
}

.excel-sql-type-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--ct-green);
  background: rgba(52, 199, 89, 0.12);
  padding: 0.25rem 0.65rem;
  border-radius: 0.35rem;
  margin-bottom: 0.45rem;
}

.excel-sql-type-card p {
  margin: 0;
  font-size: 0.875rem;
  color: var(--ct-text-muted);
  line-height: 1.65;
}

.feature-card {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  padding: 1.5rem;
  height: 100%;
  box-shadow: var(--ct-shadow-sm);
  transition: box-shadow 0.2s;
}

.feature-card:hover {
  box-shadow: var(--ct-shadow);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.65rem;
  margin-bottom: 0.85rem;
}

.feature-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ct-text);
  margin-bottom: 0.35rem;
}

.feature-card p {
  font-size: 0.825rem;
  color: var(--ct-text-muted);
  line-height: 1.65;
  margin: 0;
}

/* Page header (secondary) */
.page-header {
  padding: 2.5rem 0 0.5rem;
}

.page-header-inner {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  padding: 1.75rem 2rem;
  box-shadow: var(--ct-shadow-sm);
}

.breadcrumb {
  font-size: 0.825rem;
  margin-bottom: 0.65rem;
}

.breadcrumb-item a {
  color: var(--ct-text-muted);
  text-decoration: none;
}

.breadcrumb-item a:hover {
  color: var(--ct-primary);
}

.breadcrumb-item.active {
  color: var(--ct-text);
}

.page-title {
  font-size: clamp(1.35rem, 3vw, 1.75rem);
  font-weight: 700;
  color: var(--ct-text);
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
}

.page-desc {
  color: var(--ct-text-muted);
  font-size: 0.95rem;
  margin: 0;
  line-height: 1.6;
}

.page-body {
  padding: 1.5rem 0 3rem;
}

/* Tool cards */
.tool-card {
  background: var(--ct-surface);
  border-radius: var(--ct-radius);
  box-shadow: var(--ct-shadow-sm);
  border: none;
  height: 100%;
  transition: transform 0.2s, box-shadow 0.2s;
}

a.text-decoration-none:hover .tool-card:not(.tool-card-disabled) {
  transform: translateY(-3px);
  box-shadow: var(--ct-shadow);
}

.tool-card-disabled {
  opacity: 0.7;
  background: rgba(255, 255, 255, 0.6);
}

.tool-card .card-body {
  padding: 1.35rem !important;
}

.tool-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.65rem;
  margin-bottom: 0.75rem;
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.tool-card .card-title {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ct-text);
}

/* Tool workspace */
.tool-sidebar {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
  padding: 1.15rem;
  position: sticky;
  top: 4.5rem;
  border: none;
}

.tool-sidebar-label {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ct-text-light);
  margin-bottom: 0.65rem;
  padding-left: 0.5rem;
}

.tool-sidebar .nav-link {
  color: var(--ct-text-muted);
  border-radius: 0.55rem;
  padding: 0.55rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.15s, color 0.15s;
}

.tool-sidebar .nav-link:hover:not(.disabled) {
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
}

.tool-sidebar .nav-link.active {
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
  font-weight: 600;
}

.tool-workspace {
  background: var(--ct-surface);
  border-radius: var(--ct-radius);
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.06);
  padding: 0.5rem 0.65rem;
  border: none;
}

.tool-textarea {
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.875rem;
  min-height: 12rem;
  resize: vertical;
  background: #f9fafb;
  border: none;
  border-radius: 0.65rem;
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.08);
  transition: box-shadow 0.2s;
}

.tool-textarea:focus {
  background: #fff;
  box-shadow: inset 0 0 0 2px rgba(42, 171, 152, 0.35);
  outline: none;
}

.tool-label {
  font-weight: 600;
  font-size: 0.8rem;
  color: var(--ct-text-muted);
  margin-bottom: 0.45rem;
}

.tool-actions { gap: 0.5rem; }

.btn-primary {
  background: var(--ct-primary);
  border: none;
  font-weight: 600;
  border-radius: 0.55rem;
  box-shadow: none;
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--ct-primary-hover);
  box-shadow: none;
}

.btn-outline-primary {
  border: none;
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
  font-weight: 600;
  border-radius: 0.55rem;
}

.btn-outline-primary:hover {
  background: rgba(42, 171, 152, 0.18);
  color: var(--ct-primary-hover);
}

.btn-outline-secondary {
  border: none;
  background: #eef1f5;
  color: var(--ct-text-muted);
  border-radius: 0.55rem;
  font-weight: 500;
}

.btn-outline-secondary:hover {
  background: #e4e8ee;
  color: var(--ct-text);
}

.tool-result-error {
  color: #e5484d;
  font-family: ui-monospace, monospace;
  font-size: 0.875rem;
  white-space: pre-wrap;
}

.tool-result-success {
  color: #22a055;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Download */
.download-item {
  background: var(--ct-surface);
  border-radius: var(--ct-radius);
  box-shadow: var(--ct-shadow-sm);
  padding: 1.35rem 1.5rem;
  margin-bottom: 0.85rem;
  border: none;
  transition: box-shadow 0.2s;
}

.download-item:hover {
  box-shadow: var(--ct-shadow);
}

.download-item h5 {
  font-weight: 600;
  color: var(--ct-text);
  margin-bottom: 0.3rem;
}

.download-meta {
  font-size: 0.8rem;
  color: var(--ct-text-light);
}

/* Message */
.message-form-card {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
  padding: 1.75rem;
  border: none;
}

.message-notice {
  background: var(--ct-primary-soft);
  padding: 0.9rem 1.1rem;
  border-radius: 0.65rem;
  font-size: 0.875rem;
  color: var(--ct-text-muted);
  margin-bottom: 1.25rem;
  line-height: 1.65;
  border: none;
}

.message-list-card {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
  padding: 1.75rem;
}

.message-list-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.message-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.message-item {
  padding: 1rem 1.1rem;
  background: #f9fafb;
  border-radius: 0.75rem;
}

.message-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 0.5rem;
}

.message-author {
  font-weight: 600;
  font-size: 0.9rem;
}

.message-time {
  font-size: 0.78rem;
  color: var(--ct-text-light);
  white-space: nowrap;
}

.message-content {
  margin: 0 0 0.75rem;
  font-size: 0.92rem;
  line-height: 1.65;
  white-space: pre-wrap;
  word-break: break-word;
}

.message-item-footer {
  display: flex;
  align-items: center;
}

.btn-like {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.25rem 0.65rem;
  border: none;
  border-radius: 2rem;
  background: transparent;
  color: var(--ct-text-muted);
  font-size: 0.85rem;
  cursor: pointer;
  transition: color 0.15s, background 0.15s;
}

.btn-like:hover:not(.disabled) {
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
}

.btn-like.liked {
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.btn-like.disabled {
  cursor: default;
  opacity: 0.7;
}

.message-quota {
  font-size: 0.875rem;
  color: var(--ct-text-muted);
}

.tool-feedback-section {
  margin-top: 2rem;
  padding: 1.5rem 1.75rem;
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
}

.tool-feedback-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 0.75rem;
}

.tool-feedback-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 0.35rem;
}

.tool-feedback-desc {
  margin: 0;
  font-size: 0.9rem;
  color: var(--ct-text-muted);
  line-height: 1.6;
}

.tool-feedback-like-wrap {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.25rem;
}

.btn-tool-like {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.45rem 1rem;
  border: 1px solid var(--ct-border, #e5e7eb);
  border-radius: 2rem;
  background: #fff;
  color: var(--ct-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.15s, background 0.15s, border-color 0.15s;
}

.btn-tool-like:hover:not(:disabled) {
  border-color: var(--ct-primary);
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.btn-tool-like.liked {
  border-color: var(--ct-primary);
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.btn-tool-like:disabled {
  cursor: default;
  opacity: 0.65;
}

.tool-feedback-like-hint {
  font-size: 0.78rem;
  color: var(--ct-text-light);
}

.tool-feedback-custom {
  font-size: 0.85rem;
  color: var(--ct-text-muted);
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--ct-border, #e5e7eb);
}

.tool-feedback-compose {
  margin-bottom: 1.5rem;
}

.tool-feedback-compose-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-top: 0.5rem;
}

.tool-feedback-comments-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.tool-feedback-login {
  margin-bottom: 1.5rem;
  padding: 1rem;
  background: #f9fafb;
  border-radius: 0.75rem;
}

.auth-card {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow-sm);
  padding: 1.75rem;
}

.auth-footer {
  font-size: 0.875rem;
  color: var(--ct-text-muted);
}

.auth-footer a {
  color: var(--ct-primary);
  text-decoration: none;
  font-weight: 500;
}

.nav-user {
  font-size: 0.875rem;
  color: var(--ct-text-muted) !important;
  cursor: default;
}

.nav-logout-form {
  display: inline;
  margin: 0;
  padding: 0;
}

.nav-logout-btn {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem 1rem;
}

.nav-register {
  color: var(--ct-primary) !important;
  font-weight: 500;
}

.form-control {
  border: none;
  border-radius: 0.6rem;
  background: #f9fafb;
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.08);
  padding: 0.65rem 0.9rem;
}

.form-control:focus {
  background: #fff;
  box-shadow: inset 0 0 0 2px rgba(42, 171, 152, 0.35);
  outline: none;
}

/* Footer */
.site-footer {
  background: var(--ct-surface);
  border-top: none;
  box-shadow: 0 -1px 0 var(--ct-border);
  margin-top: auto;
  padding: 2rem 0;
}

.footer-main {
  font-size: 0.85rem;
  color: var(--ct-text-muted);
}

.footer-sub {
  font-size: 0.8rem;
  color: var(--ct-text-light);
}

.footer-link {
  color: var(--ct-primary);
  text-decoration: none;
  font-weight: 500;
}

.footer-link:hover {
  text-decoration: underline;
}


.btn:focus,
.btn:active:focus,
.form-control:focus {
  outline: none;
}

/* JSON tool page */
.json-tool-page {
  padding: 1.75rem 0 2rem;
  min-height: calc(100vh - 4.5rem);
  display: flex;
  flex-direction: column;
}

.json-tool-container {
  max-width: 1680px;
  margin: 0 auto;
  padding-left: clamp(1rem, 3vw, 2rem);
  padding-right: clamp(1rem, 3vw, 2rem);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.json-tool-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 1.25rem;
  flex-shrink: 0;
}

.json-tool-title {
  font-size: clamp(1.65rem, 4vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ct-text);
  margin-bottom: 0.65rem;
}

.json-tool-desc {
  font-size: 0.975rem;
  color: var(--ct-text-muted);
  line-height: 1.7;
  margin: 0;
}

.json-tool-panel {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow);
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.json-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.15rem;
  margin-bottom: 1.15rem;
  border-bottom: 1px solid rgba(26, 35, 50, 0.06);
  flex-shrink: 0;
}

.json-toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.json-toolbar-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ct-text-muted);
}

.indent-options {
  display: inline-flex;
  background: #f3f5f8;
  border-radius: 0.55rem;
  padding: 0.2rem;
  gap: 0.15rem;
}

.indent-btn {
  border: none;
  background: transparent;
  color: var(--ct-text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 0.45rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: var(--ct-font);
}

.indent-btn:hover {
  color: var(--ct-text);
}

.indent-btn.active {
  background: var(--ct-surface);
  color: var(--ct-primary);
  box-shadow: var(--ct-shadow-sm);
}

.json-toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.btn-tool-primary {
  background: var(--ct-primary);
  color: #fff;
  border: none;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.45rem 1rem;
  border-radius: 0.55rem;
  transition: background 0.15s;
}

.btn-tool-primary:hover {
  background: var(--ct-primary-hover);
  color: #fff;
}

.btn-tool-secondary {
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
  border: none;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.45rem 1rem;
  border-radius: 0.55rem;
}

.btn-tool-secondary:hover {
  background: rgba(42, 171, 152, 0.18);
  color: var(--ct-primary-hover);
}

.btn-tool-ghost {
  background: #f3f5f8;
  color: var(--ct-text-muted);
  border: none;
  font-weight: 500;
  font-size: 0.875rem;
  padding: 0.45rem 0.9rem;
  border-radius: 0.55rem;
}

.btn-tool-ghost:hover {
  background: #ebeef3;
  color: var(--ct-text);
}

.json-panes {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  flex: 1;
  min-height: 0;
}

.json-panes-single {
  grid-template-columns: 1fr;
}

.json-pane-head-minimal {
  justify-content: flex-end;
  min-height: 1.25rem;
}

.json-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.json-pane-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.json-pane-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  flex-shrink: 0;
  gap: 0.75rem;
}

.json-pane-meta-group {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.15rem;
}

.json-pane-pos {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ct-primary);
  font-variant-numeric: tabular-nums;
}

.json-pane-title {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ct-text);
}

.json-pane-meta {
  font-size: 0.75rem;
  color: var(--ct-text-light);
  font-variant-numeric: tabular-nums;
}

/* Editor with line numbers */
.json-editor {
  flex: 1;
  display: flex;
  min-height: 0;
  border-radius: 0.65rem;
  overflow: hidden;
  background: #f9fafb;
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.07);
}

.json-editor:focus-within {
  background: #fff;
  box-shadow: inset 0 0 0 2px rgba(42, 171, 152, 0.35);
}

.json-ln {
  flex-shrink: 0;
  padding: 1rem 0.5rem 1rem 0.65rem;
  text-align: right;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: #9aa8b8;
  background: #eef1f5;
  user-select: none;
  overflow: hidden;
  border-right: 1px solid rgba(26, 35, 50, 0.06);
}

.json-editor .json-textarea {
  width: 100%;
  flex: 1;
  min-height: 200px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--ct-text);
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 1rem 1.1rem 1rem 0.75rem;
  resize: none;
  box-shadow: none;
  transition: none;
}

.json-editor .json-textarea:focus {
  outline: none;
  background: transparent;
  box-shadow: none;
}

.json-textarea-output {
  color: var(--ct-text);
}

.json-textarea-output::placeholder {
  color: #b0bac7;
}

.json-file-input {
  display: none;
}

/* JSON formatted view (input + output) */
.json-editor-input,
.json-editor-output {
  position: relative;
}

.json-editor-stack {
  position: relative;
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
}

.json-view-highlight {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: auto;
  z-index: 1;
  cursor: text;
}

.json-view-highlight.is-selecting {
  user-select: none;
  cursor: text;
}

.json-editor-stack {
  cursor: text;
}

.json-editor-stack:focus {
  outline: none;
}

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

.json-view {
  flex: 1;
  min-height: 200px;
  overflow: auto;
  padding: 1rem 1.1rem 1rem 0.35rem;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--ct-text);
  background: transparent;
  outline: none;
}

.json-lines {
  min-height: 100%;
}

.jv-caret-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 2;
}

.jv-caret {
  position: absolute;
  width: 2px;
  height: 1.6em;
  margin-left: -1px;
  background: var(--ct-text);
  animation: jv-caret-blink 1.05s step-end infinite;
}

.jv-selection {
  position: absolute;
  height: 1.6em;
  background: rgba(42, 171, 152, 0.28);
  border-radius: 0.15rem;
}

@keyframes jv-caret-blink {
  50% { opacity: 0; }
}

.jv-line {
  display: flex;
  align-items: flex-start;
  min-height: 1.6em;
  white-space: pre;
  border-radius: 0.3rem;
  margin: 0 -0.35rem;
  padding: 0 0.35rem;
  transition: background 0.12s;
}

.jv-line.is-hover {
  background: rgba(42, 171, 152, 0.1);
}

.jv-line.is-active {
  background: rgba(42, 171, 152, 0.16);
}

.jv-fold,
.jv-fold-spacer {
  flex-shrink: 0;
  width: 1.1rem;
  height: 1.1rem;
}

.jv-fold {
  margin-top: 0.22em;
  margin-right: 0.15rem;
  padding: 0;
  border: none;
  background: transparent;
  color: var(--ct-text-muted);
  font-size: 0.65rem;
  line-height: 1;
  cursor: pointer;
  text-align: center;
  border-radius: 0.2rem;
  transition: color 0.15s, background 0.15s;
}

.jv-fold:hover {
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.jv-fold.is-collapsed {
  color: var(--ct-primary);
}

.jv-content {
  flex: 1;
  min-width: 0;
  tab-size: 2;
  -moz-tab-size: 2;
}

.jv-key {
  color: #7c6bb8;
}

.jv-str {
  color: var(--ct-primary);
}

.jv-num {
  color: #2d8a6e;
}

.jv-lit {
  color: #c96a1a;
}

.jv-ellipsis {
  color: var(--ct-text-muted);
  font-style: italic;
}

.jv-diff-change {
  background: rgba(234, 179, 8, 0.38);
  border-radius: 0.2rem;
  padding: 0 0.15rem;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.jv-diff-add {
  background: rgba(34, 197, 94, 0.35);
  border-radius: 0.2rem;
  padding: 0 0.15rem;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.jv-diff-remove {
  background: rgba(239, 68, 68, 0.35);
  border-radius: 0.2rem;
  padding: 0 0.15rem;
  box-decoration-break: clone;
  -webkit-box-decoration-break: clone;
}

.json-panes-compare {
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .json-panes-compare {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 768px) {
  .json-panes {
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .json-panes-single {
    grid-template-columns: 1fr;
  }

  .json-editor {
    min-height: 360px;
  }

  .json-editor .json-textarea,
  .json-textarea-overlay,
  .json-view {
    min-height: 360px;
  }
}

@media (min-width: 992px) {
  .json-tool-page {
    padding: 1.5rem 0 1.75rem;
  }

  .json-tool-header {
    margin-bottom: 1rem;
  }

  .json-tool-panel {
    padding: 1.35rem 1.5rem;
  }

  .json-panes {
    min-height: calc(100vh - 15.5rem);
  }

  .json-editor {
    min-height: calc(100vh - 17.5rem);
  }

  .json-editor .json-textarea,
  .json-textarea-overlay,
  .json-view {
    min-height: calc(100vh - 17.5rem);
  }
}

@media (min-width: 1400px) {
  .json-editor .json-textarea,
  .json-textarea-overlay,
  .json-view,
  .json-ln {
    font-size: 0.9rem;
  }
}

.json-status {
  min-height: 1.25rem;
  margin-top: 0.5rem;
  font-size: 0.825rem;
  flex-shrink: 0;
}

.json-status.is-success {
  color: #22a055;
}

.json-status.is-error {
  color: #e5484d;
}

@media (max-width: 767px) {
  .json-tool-panel {
    padding: 1rem;
  }

  .json-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .json-toolbar-actions {
    justify-content: flex-start;
  }

  .json-editor .json-textarea {
    min-height: 200px;
  }
}

/* Excel tool page */
.excel-tool-page {
  padding: 1.5rem 0 1.75rem;
  min-height: calc(100vh - 4.5rem);
}

.excel-tool-container {
  max-width: 1680px;
  margin: 0 auto;
  padding-left: clamp(1rem, 3vw, 2rem);
  padding-right: clamp(1rem, 3vw, 2rem);
}

.excel-tool-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 0.85rem;
}

.excel-tool-title {
  font-size: clamp(1.65rem, 4vw, 2.15rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ct-text);
  margin-bottom: 0.45rem;
}

.excel-tool-desc {
  font-size: 0.925rem;
  color: var(--ct-text-muted);
  line-height: 1.65;
  margin: 0;
}

.excel-custom-notice {
  display: inline;
}

.excel-custom-notice a {
  color: var(--ct-primary);
  font-weight: 600;
  text-decoration: none;
}

.excel-custom-notice a:hover {
  text-decoration: underline;
}

.excel-tool-panel {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  box-shadow: var(--ct-shadow);
  padding: 1.25rem;
}

.excel-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1.15rem;
  margin-bottom: 1.15rem;
  border-bottom: 1px solid rgba(26, 35, 50, 0.06);
}

.excel-toolbar-group {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
}

.excel-toolbar-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ct-text-muted);
}

.excel-tab-options {
  display: inline-flex;
  background: #f3f5f8;
  border-radius: 0.55rem;
  padding: 0.2rem;
  gap: 0.15rem;
}

.excel-tab-btn {
  border: none;
  background: transparent;
  color: var(--ct-text-muted);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.4rem 0.9rem;
  border-radius: 0.45rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: var(--ct-font);
}

.excel-tab-btn:hover {
  color: var(--ct-text);
}

.excel-tab-btn.active {
  background: var(--ct-surface);
  color: var(--ct-primary);
  box-shadow: var(--ct-shadow-sm);
}

.excel-tab-panel {
  display: none;
}

.excel-tab-panel.active {
  display: block;
}

.excel-upload-zone {
  border: 2px dashed rgba(42, 171, 152, 0.35);
  border-radius: var(--ct-radius);
  background: #f9fbfc;
  padding: 2.5rem 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.excel-upload-zone:hover,
.excel-upload-zone.is-dragover {
  border-color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.excel-upload-icon {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.excel-upload-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--ct-text);
  margin-bottom: 0.35rem;
}

.excel-upload-hint {
  font-size: 0.85rem;
  color: var(--ct-text-muted);
  margin-bottom: 1rem;
}

.excel-file-list-wrap {
  margin-top: 1.25rem;
}

.excel-file-list-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.65rem;
  gap: 0.75rem;
}

.excel-file-list-title {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ct-text);
}

.excel-file-list-actions {
  display: flex;
  gap: 0.35rem;
}

.btn-sm {
  padding: 0.3rem 0.65rem !important;
  font-size: 0.8rem !important;
}

.excel-file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.excel-file-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  background: #f9fafb;
  border-radius: 0.65rem;
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.06);
}

.excel-file-order {
  flex-shrink: 0;
  width: 1.75rem;
  height: 1.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.45rem;
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
  font-size: 0.8rem;
  font-weight: 700;
}

.excel-file-info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}

.excel-file-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ct-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.excel-file-size {
  font-size: 0.75rem;
  color: var(--ct-text-light);
}

.excel-file-ops {
  display: flex;
  gap: 0.25rem;
  flex-shrink: 0;
}

.btn-file-op {
  border: none;
  background: #eef1f5;
  color: var(--ct-text-muted);
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 0.4rem;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.btn-file-op:hover:not(:disabled) {
  background: var(--ct-primary-soft);
  color: var(--ct-primary);
}

.btn-file-op:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-file-remove:hover:not(:disabled) {
  background: rgba(229, 72, 77, 0.12);
  color: #e5484d;
}

.excel-action-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.excel-status {
  min-height: 1.25rem;
  margin-top: 0.75rem;
  font-size: 0.825rem;
}

.excel-status.is-success {
  color: #22a055;
}

.excel-status.is-error {
  color: #e5484d;
}

/* Excel To SQL */
.excel-upload-compact {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding: 0.85rem 1rem;
  border: 1px dashed rgba(42, 171, 152, 0.35);
  border-radius: 0.65rem;
  background: #f9fbfc;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.excel-upload-compact:hover,
.excel-upload-compact.is-dragover {
  border-color: var(--ct-primary);
  background: var(--ct-primary-soft);
}

.excel-upload-compact-icon {
  font-size: 1.25rem;
  flex-shrink: 0;
}

.excel-upload-compact-text {
  flex: 1;
  min-width: 0;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ct-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.excel-sql-config {
  margin-top: 0.85rem;
}

.excel-sql-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ct-text-muted);
  margin-bottom: 0.3rem;
}

.excel-sql-label-with-tip {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.excel-field-tip {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: help;
  outline: none;
}

.excel-field-tip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  font-size: 0.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--ct-primary);
  background: color-mix(in srgb, var(--ct-primary) 12%, transparent);
}

.excel-field-tip-text {
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.45rem);
  transform: translateX(-50%);
  z-index: 20;
  width: max-content;
  max-width: 18rem;
  padding: 0.45rem 0.6rem;
  border-radius: 0.45rem;
  font-size: 0.72rem;
  font-weight: 400;
  line-height: 1.45;
  color: var(--ct-text);
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  box-shadow: var(--ct-shadow-md);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.15s, visibility 0.15s;
}

.excel-field-tip:hover .excel-field-tip-text,
.excel-field-tip:focus .excel-field-tip-text,
.excel-field-tip:focus-within .excel-field-tip-text {
  opacity: 1;
  visibility: visible;
}

.excel-sql-input {
  font-size: 0.875rem;
}

.excel-sql-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 0.75rem 1rem;
}

.excel-sql-field {
  flex: 0 1 auto;
  min-width: 140px;
}

.excel-sql-field-table {
  flex: 1 1 160px;
  max-width: 240px;
}

.excel-sql-field-type {
  flex: 0 1 auto;
}

.excel-sql-field-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.45rem;
  margin-left: auto;
  flex: 0 1 auto;
}

.excel-sql-type-options {
  flex-shrink: 0;
}

.excel-sql-type-btn {
  border: none;
  background: transparent;
  color: var(--ct-text-muted);
  font-size: 0.8rem;
  font-weight: 600;
  padding: 0.35rem 0.75rem;
  border-radius: 0.45rem;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
  font-family: var(--ct-font);
}

.excel-sql-type-btn:hover {
  color: var(--ct-text);
}

.excel-sql-type-btn.active {
  background: var(--ct-surface);
  color: var(--ct-primary);
  box-shadow: var(--ct-shadow-sm);
}

.excel-sql-columns-wrap {
  margin-top: 0.85rem;
}

.excel-sql-columns-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
  margin-top: 0.4rem;
}

.excel-sql-columns-grid.is-split {
  grid-template-columns: 1fr 1fr;
}

@media (max-width: 767px) {
  .excel-sql-columns-grid.is-split {
    grid-template-columns: 1fr;
  }
}

.excel-sql-columns-table-wrap {
  overflow-x: auto;
  border-radius: 0.65rem;
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.07);
}

.excel-sql-columns-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.excel-sql-columns-table th,
.excel-sql-columns-table td {
  padding: 0.6rem 0.75rem;
  text-align: left;
  border-bottom: 1px solid rgba(26, 35, 50, 0.06);
}

.excel-sql-columns-table th {
  background: #f3f5f8;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--ct-text-muted);
}

.excel-sql-columns-table tbody tr:last-child td {
  border-bottom: none;
}

.excel-sql-columns-table .col-check,
.excel-sql-columns-table .col-where {
  width: 4.5rem;
  text-align: center;
}

.excel-sql-columns-table th.col-check,
.excel-sql-columns-table th.col-where {
  white-space: nowrap;
}

.th-check-label {
  display: inline-block;
  margin-right: 0.25rem;
  font-size: 0.7rem;
  vertical-align: middle;
}

.excel-sql-columns-table th input[type="checkbox"] {
  vertical-align: middle;
}

.excel-sql-columns-table .col-source {
  font-weight: 600;
  color: var(--ct-text);
  white-space: nowrap;
}

.excel-sql-columns-table input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--ct-primary);
  cursor: pointer;
}

.excel-sql-layout {
  display: flex;
  flex-direction: column;
  flex: 1;
  min-height: 0;
}

.excel-sql-config {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.excel-sql-output-wrap {
  margin-top: 0.75rem;
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.excel-sql-output {
  width: 100%;
  flex: 1;
  min-height: calc(100vh - 17rem);
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 0.8rem;
  line-height: 1.55;
  color: var(--ct-text);
  background: #f9fafb;
  border: none;
  border-radius: 0.65rem;
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.08);
  padding: 1rem;
  resize: vertical;
}

.excel-sql-output:focus {
  outline: none;
  box-shadow: inset 0 0 0 2px rgba(42, 171, 152, 0.35);
}

/* Image tool page */
.image-work-area {
  margin-top: 1.25rem;
}

.image-preview-row,
.image-compare-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 1rem;
  align-items: start;
}

@media (max-width: 767px) {
  .image-preview-row,
  .image-compare-row {
    grid-template-columns: 1fr;
  }

  .image-compare-arrow {
    display: none;
  }
}

.image-preview-box {
  min-width: 0;
}

.image-preview-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ct-text-muted);
  margin-bottom: 0.35rem;
}

.image-preview-frame {
  border-radius: 0.65rem;
  background: #f3f5f8;
  box-shadow: inset 0 0 0 1px rgba(26, 35, 50, 0.07);
  min-height: 160px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 0.5rem;
}

.image-preview-frame img {
  max-width: 100%;
  max-height: 280px;
  object-fit: contain;
  display: block;
}

.image-preview-frame--thumb {
  position: relative;
  min-height: 144px;
  padding: 0.35rem;
  cursor: zoom-in;
}

.image-preview-frame--thumb img {
  max-width: 240px;
  max-height: 192px;
}

.image-preview-frame--thumb::after {
  content: "";
  position: absolute;
  right: 0.5rem;
  bottom: 0.5rem;
  width: 1.75rem;
  height: 1.75rem;
  border-radius: 50%;
  background: rgba(26, 35, 50, 0.55) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='10' cy='10' r='6'/%3E%3Cpath d='M14.5 14.5L20 20'/%3E%3C/svg%3E") center / 1rem no-repeat;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
}

.image-preview-frame--thumb:hover:has(img:not([hidden]))::after {
  opacity: 1;
}

.image-preview-frame--thumb:not(:has(img:not([hidden]))) {
  cursor: default;
}

.image-zoom-overlay {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(15, 20, 28, 0.82);
  backdrop-filter: blur(4px);
}

.image-zoom-overlay[hidden] {
  display: none !important;
}

.image-zoom-img {
  max-width: min(96vw, 1200px);
  max-height: 90vh;
  object-fit: contain;
  border-radius: 0.5rem;
  box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.35);
}

.image-zoom-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.image-zoom-close:hover {
  background: rgba(255, 255, 255, 0.28);
}

body.image-zoom-open {
  overflow: hidden;
}

.image-dimension-row {
  display: flex;
  align-items: flex-end;
  gap: 0.5rem;
  grid-column: 1 / -1;
}

.image-dimension-row .excel-sql-field {
  flex: 1;
  min-width: 0;
}

.image-aspect-lock {
  flex-shrink: 0;
  width: 2.35rem;
  height: 2.35rem;
  margin-bottom: 0.05rem;
  border: 1px solid rgba(26, 35, 50, 0.12);
  border-radius: 0.5rem;
  background: #f9fafb;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s, color 0.2s;
}

.image-aspect-lock.is-locked {
  color: var(--ct-primary);
  background: var(--ct-primary-soft);
  border-color: rgba(42, 171, 152, 0.35);
}

.image-aspect-lock:hover {
  border-color: var(--ct-primary);
}

.image-preview-row--compact {
  grid-template-columns: auto;
  justify-content: start;
}

.image-preview-placeholder {
  font-size: 0.85rem;
  color: var(--ct-text-light);
  padding: 2rem 1rem;
  text-align: center;
}

.image-file-meta {
  margin-top: 0.4rem;
  font-size: 0.75rem;
  color: var(--ct-text-light);
}

.image-ocr-config {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding-top: 0.25rem;
}

.image-inline-actions {
  margin-top: 0;
}

.image-ocr-progress {
  margin-top: 0.25rem;
}

.image-progress-bar {
  height: 0.35rem;
  background: #eef1f5;
  border-radius: 1rem;
  overflow: hidden;
  margin-bottom: 0.35rem;
}

.image-progress-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--ct-primary), var(--ct-accent));
  border-radius: 1rem;
  transition: width 0.2s;
}

.image-progress-text {
  font-size: 0.75rem;
  color: var(--ct-text-muted);
}

.image-ocr-output-wrap {
  margin-top: 1.25rem;
}

.image-output-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.35rem;
}

.image-text-output {
  min-height: 200px;
  font-family: var(--ct-font);
}

.image-base64-output {
  max-height: 320px;
  resize: vertical;
}

.image-field-hint {
  font-size: 0.75rem;
  color: var(--ct-text-muted);
  margin: 0.25rem 0 0;
}

.image-compress-config {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem 1rem;
  margin-bottom: 1.25rem;
}

.image-range {
  width: 100%;
  accent-color: var(--ct-primary);
  cursor: pointer;
}

.image-compare-arrow {
  align-self: center;
  font-size: 1.5rem;
  color: var(--ct-text-light);
  padding-top: 1.5rem;
}

/* QQ float contact */
.qq-float-wrap {
  position: fixed;
  right: 1.25rem;
  bottom: max(1.5rem, env(safe-area-inset-bottom, 0px));
  z-index: 1045;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.75rem;
}

.qq-float-panel {
  position: relative;
  width: min(17rem, calc(100vw - 2rem));
  padding: 1rem 1rem 0.85rem;
  border-radius: 1rem;
  background: var(--ct-surface);
  border: 1px solid var(--ct-border);
  box-shadow: var(--ct-shadow-hover);
  animation: qq-panel-in 0.22s ease;
}

.qq-float-panel[hidden] {
  display: none !important;
}

.qq-float-panel-close {
  position: absolute;
  top: 0.45rem;
  right: 0.55rem;
  border: none;
  background: transparent;
  color: var(--ct-text-light);
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0.15rem 0.35rem;
}

.qq-float-panel-close:hover {
  color: var(--ct-text);
}

.qq-float-panel-head {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 0.55rem;
  padding-right: 1.25rem;
}

.qq-float-panel-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 50%;
  color: #fff;
  background: linear-gradient(135deg, #12b7f5 0%, #0a7ec4 100%);
  flex-shrink: 0;
}

.qq-float-panel-icon svg {
  width: 1.55rem;
  height: 1.55rem;
}

.qq-float-panel-title {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ct-text-muted);
}

.qq-float-panel-number {
  margin: 0.1rem 0 0;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ct-text);
}

.qq-float-panel-hint {
  margin: 0 0 0.75rem;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--ct-text-muted);
}

.qq-float-panel-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.qq-float-action {
  border: 1px solid var(--ct-border);
  border-radius: 0.55rem;
  background: var(--ct-bg);
  color: var(--ct-text);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.5rem 0.55rem;
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.qq-float-action:hover {
  border-color: rgba(18, 183, 245, 0.35);
  background: rgba(18, 183, 245, 0.08);
}

.qq-float-action-primary {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(135deg, #12b7f5 0%, #0a7ec4 100%);
}

.qq-float-action-primary:hover {
  color: #fff;
  background: linear-gradient(135deg, #0fa8e8 0%, #0970b0 100%);
}

.qq-float-action.is-copied {
  background: rgba(52, 199, 89, 0.15);
  border-color: rgba(52, 199, 89, 0.35);
  color: #1f8f4e;
}

.qq-float-panel-tip {
  margin: 0.65rem 0 0;
  font-size: 0.72rem;
  line-height: 1.45;
  color: var(--ct-text-light);
}

.qq-float {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.55rem 0.7rem 0.55rem 0.55rem;
  border: none;
  border-radius: 999px;
  color: #fff;
  background: linear-gradient(135deg, #12b7f5 0%, #0d8fd4 55%, #0a7ec4 100%);
  box-shadow:
    0 8px 24px rgba(18, 183, 245, 0.38),
    0 2px 8px rgba(10, 126, 196, 0.2);
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, padding 0.25s ease;
  animation: qq-float-bob 3.2s ease-in-out infinite;
}

.qq-float:hover,
.qq-float:focus-visible,
.qq-float.is-open {
  animation: none;
  transform: translateY(-4px) scale(1.03);
  box-shadow:
    0 14px 32px rgba(18, 183, 245, 0.45),
    0 4px 12px rgba(10, 126, 196, 0.25);
  padding-right: 1rem;
}

.qq-float:focus-visible {
  outline: 2px solid rgba(18, 183, 245, 0.55);
  outline-offset: 3px;
}

.qq-float-glow {
  position: absolute;
  inset: -4px;
  border-radius: inherit;
  background: radial-gradient(circle, rgba(18, 183, 245, 0.35) 0%, transparent 70%);
  opacity: 0.65;
  animation: qq-float-pulse 2.4s ease-out infinite;
  pointer-events: none;
}

.qq-float-icon {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.18);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.28);
  flex-shrink: 0;
}

.qq-float-icon svg {
  width: 1.55rem;
  height: 1.55rem;
  color: #fff;
}

.qq-float-body {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  max-width: 0;
  opacity: 0;
  overflow: hidden;
  white-space: nowrap;
  transition: max-width 0.28s ease, opacity 0.22s ease;
}

.qq-float:hover .qq-float-body,
.qq-float:focus-visible .qq-float-body,
.qq-float.is-open .qq-float-body {
  max-width: 8rem;
  opacity: 1;
}

.qq-float-label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  opacity: 0.92;
}

.qq-float-number {
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
}

@keyframes qq-float-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes qq-float-pulse {
  0% { transform: scale(0.95); opacity: 0.55; }
  70% { transform: scale(1.15); opacity: 0; }
  100% { transform: scale(1.15); opacity: 0; }
}

@keyframes qq-panel-in {
  from { opacity: 0; transform: translateY(8px) scale(0.96); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (max-width: 575.98px) {
  .qq-float-wrap {
    right: 0.85rem;
    bottom: max(1rem, env(safe-area-inset-bottom, 0px));
  }

  .qq-float {
    padding: 0.5rem;
  }

  .qq-float-body {
    max-width: 7rem;
    opacity: 1;
  }

  .qq-float:hover,
  .qq-float:focus-visible,
  .qq-float.is-open {
    padding-right: 0.85rem;
  }

  .qq-float-panel-actions {
    grid-template-columns: 1fr;
  }
}

.tool-sidebar-nav { display: flex; flex-direction: column; gap: 0.25rem; }
.tool-sidebar-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 0.75rem;
  border-radius: 0.55rem;
  color: var(--ct-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  transition: background 0.15s ease, color 0.15s ease;
}
.tool-sidebar-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.625rem;
  height: 1.625rem;
  border-radius: 0.4rem;
  transition: transform 0.15s ease;
}
.tool-sidebar-icon .ct-icon {
  width: 0.95rem;
  height: 0.95rem;
}
.tool-sidebar-text {
  min-width: 0;
  line-height: 1.3;
}
.tool-sidebar-link:hover { background: var(--ct-primary-soft); color: var(--ct-primary); }
.tool-sidebar-link:hover .tool-sidebar-icon { transform: scale(1.05); }
.tool-sidebar-link.active { background: var(--ct-primary-soft); color: var(--ct-primary); font-weight: 600; }

/* Compact tool page shell */
.tool-page-shell {
  --ct-tool-header: 4.5rem;
  max-width: 1920px;
  margin: 0 auto;
  padding: 0 clamp(0.5rem, 1.25vw, 0.85rem);
}

.tool-page-body {
  padding: 0.35rem 0 1rem;
}

.tool-page-row {
  align-items: stretch;
}

.tool-page-row > [class*="col-"] {
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.tool-main-col {
  min-width: 0;
}

.tool-page-shell .tool-sidebar {
  padding: 0.55rem 0.45rem;
  top: calc(var(--ct-tool-header) + 0.35rem);
  max-height: calc(100vh - var(--ct-tool-header) - 0.75rem);
  overflow-y: auto;
}

.tool-page-shell .tool-sidebar-label {
  font-size: 0.68rem;
  margin-bottom: 0.3rem;
  padding-left: 0.35rem;
}

.tool-page-shell .tool-sidebar-link {
  padding: 0.38rem 0.5rem;
  font-size: 0.8125rem;
  gap: 0.4rem;
}
.tool-page-shell .tool-sidebar-icon {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 0.35rem;
}
.tool-page-shell .tool-sidebar-icon .ct-icon {
  width: 0.85rem;
  height: 0.85rem;
}

.tool-page-shell .tool-workspace {
  flex: 1;
  min-height: calc(100vh - var(--ct-tool-header) - 0.75rem);
  display: flex;
  flex-direction: column;
}

.generic-tool-page {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  position: relative;
}

.tool-usage-badge {
  position: absolute;
  right: 0.75rem;
  bottom: 0.5rem;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  font-size: 0.75rem;
  color: var(--ct-text-muted);
  pointer-events: none;
  z-index: 2;
  user-select: none;
}

.tool-usage-count {
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.tool-usage-label {
  opacity: 0.85;
}

.tool-panel { display: flex; flex-direction: column; gap: 0.65rem; flex: 1; min-height: 0; }
.tool-toolbar { display: flex; flex-wrap: wrap; gap: 0.45rem; align-items: center; flex-shrink: 0; }
.tool-panes { display: grid; grid-template-columns: 1fr 1fr; gap: 0.65rem; flex: 1; min-height: 0; align-items: stretch; }
.tool-pane { display: flex; flex-direction: column; min-height: 0; }
.tool-pane-label { display: block; font-size: 0.75rem; font-weight: 600; margin-bottom: 0.25rem; color: var(--ct-text-muted); flex-shrink: 0; }
.tool-page-shell .tool-textarea {
  width: 100%;
  min-height: calc(100vh - 10.5rem);
  flex: 1;
  padding: 0.65rem 0.75rem;
  resize: none;
}

.tool-pane > .tool-editor,
.excel-sql-output-wrap > .tool-editor {
  flex: 1;
  min-height: 0;
}

.tool-page-shell .tool-pane > .tool-editor {
  min-height: calc(100vh - 10.5rem);
}

.tool-page-shell .excel-sql-output-wrap > .tool-editor {
  min-height: calc(100vh - 17rem);
}

.tool-editor .tool-textarea,
.tool-editor .excel-sql-output {
  min-height: 0;
  flex: 1;
  width: 100%;
  padding: 1rem 1.1rem 1rem 0.75rem;
  border: none;
  border-radius: 0;
  box-shadow: none;
  background: transparent;
  resize: none;
  line-height: 1.6;
}

.tool-editor .tool-textarea:focus,
.tool-editor .excel-sql-output:focus {
  outline: none;
  background: transparent;
  box-shadow: none;
}

.tool-editor .excel-sql-output {
  font-size: 0.8rem;
  line-height: 1.55;
}

.tool-page-shell .json-tool-panel {
  flex: 1;
  min-height: 0;
  padding: 0;
  background: transparent;
  box-shadow: none;
}

.tool-page-shell .json-toolbar {
  padding-bottom: 0.65rem;
  margin-bottom: 0.65rem;
}

.tool-page-shell .tool-diff-output {
  flex: 1;
  min-height: calc(100vh - 14rem);
  overflow: auto;
}
.tool-textarea-output { background: var(--ct-bg); }
.tool-status { font-size: 0.85rem; color: var(--ct-text-muted); }
.tool-status.is-ok { color: #16a34a; }
.tool-status.is-error { color: #dc2626; }
.tool-diff-output pre { white-space: pre-wrap; word-break: break-word; font-size: 0.85rem; }
.tool-tutorial-block { margin-top: 2rem; padding-top: 1.5rem; border-top: 1px solid var(--ct-border); }
.tool-tutorial-code { background: #0f172a; color: #e2e8f0; padding: 1rem; border-radius: var(--ct-radius); overflow-x: auto; font-size: 0.85rem; }

.category-hub, .topic-hub { padding: 2.5rem 0 3rem; }
.category-hub-header, .topic-hub .category-hub-header { margin-bottom: 2rem; }
.tool-card-link { text-decoration: none; color: inherit; display: block; height: 100%; }
.tool-card {
  background: var(--ct-surface);
  border-radius: var(--ct-radius-lg);
  padding: 1.25rem;
  height: 100%;
  box-shadow: var(--ct-shadow-sm);
  transition: transform 0.15s, box-shadow 0.15s;
}
.tool-card:hover { transform: translateY(-2px); box-shadow: var(--ct-shadow); }
.tool-card-title { font-size: 1.05rem; font-weight: 600; margin-bottom: 0.5rem; }
.tool-card-text { color: var(--ct-text-muted); font-size: 0.9rem; margin-bottom: 0.75rem; }
.tool-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  flex-wrap: wrap;
}
.tool-card-arrow { font-size: 0.85rem; color: var(--ct-primary); font-weight: 600; }
.tool-card-usage {
  font-size: 0.75rem;
  color: var(--ct-text-muted);
  font-variant-numeric: tabular-nums;
  margin-left: auto;
}

.blog-card, .blog-post { background: var(--ct-surface); border-radius: var(--ct-radius-lg); padding: 1.5rem; box-shadow: var(--ct-shadow-sm); }
.blog-card-title a { color: inherit; text-decoration: none; }
.blog-card-meta { color: var(--ct-text-light); font-size: 0.85rem; }
.blog-post-body h2 { font-size: 1.25rem; margin-top: 1.5rem; }
.blog-post-body pre { background: #0f172a; color: #e2e8f0; padding: 1rem; border-radius: var(--ct-radius); overflow-x: auto; }

.excel-compare-zone { min-height: 10rem; }
.excel-compare-list { margin: 0.5rem 0 0; padding-left: 1.25rem; font-size: 0.85rem; }
.excel-compare-list li { margin-bottom: 0.35rem; word-break: break-word; }
.diff-same { color: #16a34a; font-weight: 600; }
.diff-diff-title { font-weight: 600; margin-bottom: 0.5rem; }

@media (max-width: 991px) {
  .tool-panes { grid-template-columns: 1fr; }

  .tool-page-shell .tool-workspace {
    min-height: auto;
  }

  .tool-page-shell .tool-textarea,
  .tool-page-shell .tool-pane > .tool-editor {
    min-height: 16rem;
    resize: vertical;
  }

  .tool-page-shell .excel-sql-output-wrap > .tool-editor {
    min-height: 14rem;
  }

  .tool-page-shell .tool-sidebar {
    position: static;
    max-height: none;
    margin-bottom: 0.35rem;
  }

  .excel-sql-output {
    min-height: 14rem;
    resize: vertical;
  }
}