:root {
  --bg: #f4f6fb;
  --surface: #ffffff;
  --surface-alt: #f8faff;
  --text: #1d2433;
  --muted: #6b7486;
  --border: #dde3ef;
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --danger: #dc2626;
  --shadow: 0 14px 40px rgba(30, 41, 82, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "Microsoft YaHei", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 28px 16px;
}

h1 {
  margin: 0;
  font-size: 26px;
  letter-spacing: 0.02em;
}

.subtitle {
  margin: 4px 0 0;
  color: var(--muted);
}

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

.button {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 14px;
  background: var(--surface);
  color: var(--text);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.button:hover {
  border-color: #c6cde0;
  transform: translateY(-1px);
}

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

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

.button.ghost {
  background: transparent;
}

.button.small {
  padding: 6px 10px;
  font-size: 13px;
}

.button.danger {
  color: var(--danger);
}

.file-label {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.tabs {
  display: flex;
  gap: 6px;
  padding: 0 28px;
  border-bottom: 1px solid var(--border);
}

.tab {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 15px;
  padding: 12px 14px;
  cursor: pointer;
  border-bottom: 2px solid transparent;
}

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

.tab.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

main {
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 28px 48px;
}

.panel {
  display: none;
  animation: fadeIn 0.2s ease;
}

.panel.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

input,
select,
textarea {
  font: inherit;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px 11px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(79, 70, 229, 0.18);
  border-color: var(--primary);
}

.toolbar input {
  flex: 1 1 260px;
  min-width: 200px;
}

.muted {
  color: var(--muted);
}

.table-wrap {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  overflow: auto;
  box-shadow: 0 8px 26px rgba(30, 41, 82, 0.05);
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 980px;
}

th,
td {
  text-align: left;
  padding: 12px 13px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

th {
  background: var(--surface-alt);
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

tbody tr:hover {
  background: #f9faff;
}

.word-cell {
  font-weight: 600;
  font-size: 16px;
  color: var(--primary);
}

.pos-badge,
.tag {
  display: inline-block;
  background: #eef2ff;
  color: var(--primary);
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 12px;
}

.tag {
  background: #eef6f0;
  color: #15803d;
  margin: 2px 3px 2px 0;
}

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

.actions-col {
  width: 108px;
}

.row-actions {
  display: flex;
  gap: 6px;
}

.empty-state {
  padding: 28px;
  text-align: center;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: 14px;
}

.translator-layout {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 14px;
  align-items: stretch;
}

.translate-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  box-shadow: 0 8px 26px rgba(30, 41, 82, 0.05);
}

.translate-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 36px;
}

.translate-head label {
  font-weight: 600;
}

textarea {
  width: 100%;
  resize: vertical;
  min-height: 180px;
  line-height: 1.6;
}

.swap-button {
  align-self: center;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--primary);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  font-size: 20px;
  cursor: pointer;
}

.translate-action {
  margin-top: 16px;
  width: 100%;
  padding: 12px;
  font-size: 15px;
}

.note {
  margin-top: 10px;
  font-size: 13px;
}

.form-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px;
  box-shadow: 0 8px 26px rgba(30, 41, 82, 0.05);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 7px;
  font-size: 14px;
  color: var(--muted);
}

.form-grid input,
.form-grid select,
.form-grid textarea {
  color: var(--text);
}

.form-grid .full {
  grid-column: 1 / -1;
}

.form-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 10px;
}

.prose {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px 28px;
  line-height: 1.75;
}

.prose h2 {
  margin-top: 28px;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose ul {
  padding-left: 22px;
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.42);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 50;
}

.modal-backdrop[hidden] {
  display: none;
}

.modal {
  width: min(760px, 100%);
  max-height: 90vh;
  overflow: auto;
  background: var(--surface);
  border-radius: 18px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.modal-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}

.modal-head h2 {
  margin: 0;
}

.icon-button {
  border: 0;
  background: transparent;
  font-size: 26px;
  color: var(--muted);
  cursor: pointer;
  line-height: 1;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  background: #1d2433;
  color: #fff;
  padding: 10px 16px;
  border-radius: 10px;
  font-size: 14px;
  box-shadow: var(--shadow);
  z-index: 60;
}

@media (max-width: 760px) {
  .topbar,
  .tabs,
  main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .translator-layout {
    grid-template-columns: 1fr;
  }

  .swap-button {
    transform: rotate(90deg);
  }

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

  .form-grid .full {
    grid-column: auto;
  }
}