:root {
  --bg: #f0f6ff;
  --surface: #ffffff;
  --surface-2: #e8f1ff;
  --border: #c7daf5;
  --text: #0f2744;
  --text-muted: #5a7394;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --accent-light: #dbeafe;
  --success: #16a34a;
  --warning: #d97706;
  --danger: #dc2626;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(37, 99, 235, 0.08);
  --font: "DM Sans", system-ui, sans-serif;
}

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

body {
  margin: 0;
  font-family: var(--font);
  background: linear-gradient(180deg, #f8fbff 0%, #eef4ff 50%, #e8f0fe 100%);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

.top-marquee {
  position: sticky;
  top: 0;
  z-index: 200;
  width: 100%;
  background: linear-gradient(90deg, #ffffff 0%, #eff6ff 50%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(37, 99, 235, 0.08);
  overflow: hidden;
}

.marquee-wrap {
  width: 100%;
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 4%, #000 96%, transparent);
}

.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee-scroll 35s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

.marquee-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 1.5rem;
  white-space: nowrap;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.marquee-group strong {
  color: var(--text);
  font-weight: 600;
}

.marquee-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  flex-shrink: 0;
}

.marquee-badge-free {
  background: #dcfce7;
  color: #15803d;
  border: 1px solid #86efac;
}

.marquee-badge-paid {
  background: #fef3c7;
  color: #b45309;
  border: 1px solid #fcd34d;
}

.marquee-sep {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--border);
  flex-shrink: 0;
}

@keyframes marquee-scroll {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-50%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .marquee-track {
    animation: none;
    flex-wrap: wrap;
    width: 100%;
    justify-content: center;
  }

  .marquee-group[aria-hidden="true"] {
    display: none;
  }

  .marquee-group {
    white-space: normal;
    text-align: center;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
  }
}

.app {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1.5rem;
}

.header {
  margin-bottom: 1.5rem;
}

.header-content {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.25rem;
}

.header-right {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
}

.user-bar {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 0.55rem 0.65rem 0.55rem 0.55rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: var(--shadow);
}

.user-profile {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding-right: 0.85rem;
  border-right: 1px solid var(--border);
}

.user-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  color: #ffffff;
  font-size: 0.95rem;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 2px 10px rgba(37, 99, 235, 0.25);
}

.user-info {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  min-width: 0;
}

.user-label {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.user-name {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.2;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 140px;
}

.user-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.user-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.85rem;
  border-radius: 9px;
  font: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.15s, border-color 0.15s, color 0.15s, transform 0.1s;
  white-space: nowrap;
}

.user-btn:active {
  transform: scale(0.98);
}

.user-btn-outline {
  background: var(--accent-light);
  border: 1px solid #93c5fd;
  color: var(--accent);
}

.user-btn-outline:hover {
  background: #bfdbfe;
  border-color: var(--accent);
  color: var(--accent-hover);
}

.user-btn-logout {
  background: #fff;
  border: 1px solid #fecaca;
  color: #dc2626;
}

.user-btn-logout:hover {
  background: #fef2f2;
  border-color: #f87171;
  color: #b91c1c;
}

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, #2563eb, #3b82f6);
  border-radius: 14px;
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: -0.02em;
  color: #ffffff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.logo h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0.15rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.mode-switch {
  display: flex;
  gap: 0.5rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.35rem;
}

.mode-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.1rem;
  border: none;
  border-radius: 9px;
  background: transparent;
  color: var(--text-muted);
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, color 0.15s;
}

.mode-btn:hover {
  color: var(--text);
  background: var(--surface-2);
}

.mode-btn.active {
  background: var(--accent);
  color: white;
}

.settings-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
  margin-bottom: 1.25rem;
}

.hidden {
  display: none !important;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  align-items: flex-end;
}

.field-inline {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.field-inline select,
.field-inline input {
  min-width: 180px;
  padding: 0.55rem 0.75rem;
  background: #f8fbff;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
}

.field-inline input:focus,
.field-inline select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.instructions {
  margin-bottom: 1.25rem;
}

.instructions h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.instructions ol {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.instructions li + li {
  margin-top: 0.35rem;
}

.columns-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.column-card.optional {
  display: none;
}

.columns-grid.show-optional .column-card.optional {
  display: block;
}

.column-header {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.column-num {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-light);
  border: 1px solid #bfdbfe;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
}

.column-header h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 600;
}

.column-hint {
  margin: 0.15rem 0 0;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.optional-tag {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--surface-2);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  vertical-align: middle;
}

.line-count {
  margin-left: auto;
  font-size: 0.75rem;
  color: var(--text-muted);
  white-space: nowrap;
  padding-top: 0.2rem;
}

.line-count.mismatch {
  color: var(--warning);
  font-weight: 600;
}

textarea {
  width: 100%;
  padding: 0.75rem;
  background: #f8fbff;
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font: inherit;
  font-size: 0.875rem;
  line-height: 1.6;
  resize: vertical;
  min-height: 200px;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

textarea::placeholder {
  color: #94a3b8;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.stat-label {
  display: block;
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.stat-value {
  font-size: 1.5rem;
  font-weight: 700;
}

.stat-warning {
  color: var(--warning) !important;
}

.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.1rem;
  border: none;
  border-radius: 8px;
  font: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent-hover);
}

.preview-section {
  margin-bottom: 1.5rem;
}

.preview-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.preview-header h2 {
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
}

.preview-badge {
  font-size: 0.8rem;
  color: var(--text-muted);
  background: var(--surface-2);
  padding: 0.25rem 0.65rem;
  border-radius: 999px;
}

.table-wrap {
  overflow-x: auto;
  border-radius: 8px;
  border: 1px solid var(--border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}

thead {
  background: var(--surface-2);
}

th,
td {
  padding: 0.65rem 0.85rem;
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

tbody tr:last-child td {
  border-bottom: none;
}

tbody tr:hover {
  background: rgba(37, 99, 235, 0.06);
}

.empty-row td {
  text-align: center;
  color: var(--text-muted);
  padding: 2rem;
}

.row-error {
  background: rgba(239, 68, 68, 0.08) !important;
}

.footer {
  text-align: center;
  padding: 1rem;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.seo-section {
  margin-bottom: 1.5rem;
}

.seo-section h2 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.seo-lead {
  margin: 0 0 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

.seo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.seo-grid h3 {
  margin: 0 0 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.seo-grid p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.seo-list {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  line-height: 1.65;
}

.seo-list li + li {
  margin-top: 0.35rem;
}

.seo-keywords {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.seo-keywords a {
  color: var(--accent);
  text-decoration: none;
  background: var(--accent-light);
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  transition: background 0.15s;
}

.seo-keywords a:hover {
  background: #bfdbfe;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  padding: 0.85rem 1.25rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: 10px;
  box-shadow: 0 8px 32px rgba(37, 99, 235, 0.15);
  font-size: 0.9rem;
  z-index: 100;
  animation: slideIn 0.25s ease;
}

.toast.success {
  border-color: var(--success);
  color: var(--success);
}

.toast.error {
  border-color: var(--danger);
  color: var(--danger);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 640px) {
  .app {
    padding: 1rem;
  }

  .header-content {
    flex-direction: column;
  }

  .user-bar {
    width: 100%;
    justify-content: space-between;
  }

  .user-profile {
    border-right: none;
    padding-right: 0;
  }

  .user-name {
    max-width: 120px;
  }

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

  .toolbar-actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }
}