:root {
  --app-ink: #0c2a3a;
  --app-sea: #1a5c6e;
  --app-sea-hover: #154a59;
  --app-mist: #d8ece8;
  --app-accent: #e8a54b;
  --app-surface: rgba(255, 252, 247, 0.92);
  --app-bg: #faf9f6;
  --app-border: #b7c9ce;
  --app-border-light: rgba(26, 92, 110, 0.1);
  --app-focus: rgba(26, 92, 110, 0.35);
  --app-danger: #ef4444;
  --app-danger-hover: #b91c1c;
  --font-sans: Manrope, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: Fraunces, Georgia, serif;
}


* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--app-ink);
  background: var(--app-bg);
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  color: var(--app-ink);
}


.modal-message--danger {
  color: var(--app-danger);
  font-style: italic;
}

.home-hsk-info-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 1.5rem;
  height: 1.5rem;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: transparent;
  background-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  box-shadow: none;
  color: #b45309;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
}

.home-hsk-info-button:hover, .home-hsk-info-button:focus-visible {
  background: transparent;
  background-color: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  color: #92400e;
  outline: none;
}

.home-hsk-info-icon {
  width: 1.35rem;
  height: 1.35rem;
}

.home-hsk-info-text {
  margin: 0;
  font-size: 0.95rem;
  color: #374151;
  line-height: 1.5;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(12, 42, 58, 0.55);
  backdrop-filter: blur(2px);
  z-index: 1000;
}

.modal-overlay.modal-overlay--stacked {
  z-index: 1100;
}

.modal-dialog {
  width: 100%;
  max-width: 28rem;
  padding: 1.5rem;
  border-radius: 0.75rem;
  background: var(--app-surface);
  backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  box-shadow: 0 24px 48px rgba(6, 24, 36, 0.25);
}

.modal-title {
  margin: 0 0 1.25rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: #111827;
}

.modal-form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.modal-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.modal-field-checkbox, .modal-field-toggle {
  display: flex;
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.modal-field-toggle .modal-field-label {
  margin: 0;
}

.toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

.toggle input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: relative;
  display: inline-block;
  width: 2.75rem;
  height: 1.5rem;
  border-radius: 9999px;
  background: var(--app-border);
  transition: background-color 0.2s ease;
}

.toggle-slider::before {
  content: "";
  position: absolute;
  top: 0.125rem;
  left: 0.125rem;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background: #ffffff;
  transition: transform 0.2s ease;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.2);
}

.toggle input:checked + .toggle-slider {
  background: var(--app-sea);
}

.toggle input:checked + .toggle-slider::before {
  transform: translateX(1.25rem);
}

.toggle input:focus-visible + .toggle-slider {
  outline: 2px solid var(--app-focus);
  outline-offset: 2px;
}

.modal-field-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: #374151;
}

.modal-field input[type="text"] {
  width: 100%;
  margin-top: 0;
  padding: 0.7rem 0.85rem;
  border: 1px solid var(--app-border);
  border-radius: 0.55rem;
  background: #ffffff;
  color: var(--app-ink);
  font-size: 0.95rem;
  transition: border-color 0.15s ease, outline 0.15s ease;
}

.modal-field input[type="text"]:read-only {
  background: #f3f4f6;
  color: #6b7280;
}

.modal-field input[type="text"]:focus {
  outline: 2px solid var(--app-focus);
  border-color: var(--app-sea);
}

.modal-message {
  margin: 0 0 1.5rem;
  color: #111827;
  line-height: 1.5;
}

.modal-dialog--warning {
  border-color: #f59e0b;
  background: #fffbeb;
}

.modal-dialog--warning .modal-message {
  color: #92400e;
}

.modal-dialog--wide {
  max-width: 40rem;
  max-height: min(90vh, 48rem);
  overflow-y: auto;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.75rem;
}

/* ---------------------------------------------------------------------
 * Button (see Button.tsx) — the app's only button design system.
 * kind = semantic color (cancel/confirm/danger), variant = context sizing.
 * ------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  margin-top: 0;
  border-radius: 0.5rem;
  font-family: inherit;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, border-color 0.15s ease, transform 0.15s ease;
}

.btn:active:not(:disabled) {
  transform: translateY(1px);
}

.btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.btn svg {
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.btn-cancel {
  border: 1px solid var(--app-border);
  background: transparent;
  color: var(--app-ink);
}

.btn-cancel:hover:not(:disabled) {
  background-color: var(--app-border-light);
}

.btn-confirm {
  border: 1px solid var(--app-sea);
  background: transparent;
  color: var(--app-sea);
}

.btn-confirm:hover:not(:disabled) {
  background-color: var(--app-border-light);
}

.btn-danger {
  border: 1px solid var(--app-danger);
  background: transparent;
  color: var(--app-danger);
}

.btn-danger:hover:not(:disabled) {
  background-color: #fef2f2;
}

.btn-page {
  padding: 0.7rem 1rem;
  font-size: 0.95rem;
  font-weight: 600;
  backdrop-filter: blur(10px);
}

.btn-modal {
  padding: 0.625rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
}

.btn-banner {
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 600;
}

.btn-table {
  padding: 0.375rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
}

/* Small table-row actions read better filled than outlined. */
.btn-table.btn-confirm {
  border: none;
  background-color: var(--app-sea);
  color: #ffffff;
}

.btn-table.btn-confirm:hover:not(:disabled) {
  background-color: var(--app-sea-hover);
}

.btn-table.btn-danger {
  border: none;
  background-color: #dc2626;
  color: #ffffff;
}

.btn-table.btn-danger:hover:not(:disabled) {
  background-color: #b91c1c;
}

.btn-confirmation {
  padding: 0.625rem 1rem;
  font-size: 0.95rem;
  font-weight: 500;
}

/* The one place a filled/heavy button is intentional: the actual
   validation button of a yes/no confirmation dialog (see ConfirmModal). */
.btn-confirmation.btn-confirm {
  border: none;
  background-color: var(--app-sea);
  color: #ffffff;
}

.btn-confirmation.btn-confirm:hover:not(:disabled) {
  background-color: var(--app-sea-hover);
}

.btn-confirmation.btn-danger {
  border: none;
  background-color: var(--app-danger);
  color: #ffffff;
}

.btn-confirmation.btn-danger:hover:not(:disabled) {
  background-color: var(--app-danger-hover);
}

.table-error {
  color: #b91c1c;
}


.app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.app-main {
  flex: 1;
  padding: 1.5rem;
}


.page {
  max-width: 48rem;
  margin: 0 auto;
}

.page--full-width {
  max-width: none;
  width: 100%;
  margin: 0;
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-header h1 {
  margin: 0;
  font-size: 1.75rem;
  font-weight: 700;
}

.page-header-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.page-content {
  color: #374151;
  line-height: 1.6;
}

@media (max-width: 640px) {
  .page-header {
    flex-wrap: wrap;
  }

  .page-header h1 {
    flex-basis: 100%;
  }

  .page-header-actions {
    flex-wrap: wrap;
  }
}


.app-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin: 0 0 1.25rem;
  padding: 0.55rem 1rem;
  border: 1px solid #93c5fd;
  border-radius: 0.75rem;
  background: #eff6ff;
}

.app-banner-text {
  margin: 0;
  flex: 1;
  min-width: 0;
  color: #1e40af;
  line-height: 1.45;
  font-size: 0.95rem;
}

.app-banner :global(.btn-confirm) {
  flex-shrink: 0;
  border-color: #2563eb;
  background: #ffffff;
  color: #1e40af;
}

.app-banner :global(.btn-confirm):hover:not(:disabled) {
  background: #dbeafe;
}

.app-banner--warning {
  border-color: #f59e0b;
  background: #fffbeb;
}

.app-banner--warning .app-banner-text {
  color: #92400e;
}

.app-banner--warning :global(.btn-confirm) {
  border-color: #d97706;
  color: #92400e;
}

.app-banner--warning :global(.btn-confirm):hover:not(:disabled) {
  background: #fef3c7;
}

@media (max-width: 640px) {
  .app-banner {
    flex-wrap: wrap;
  }

  .app-banner-text {
    flex-basis: 100%;
  }
}


.grammar-detail-tabs {
  display: flex;
  gap: 0.5rem;
  border-bottom: 1px solid var(--app-border-light);
  margin-bottom: 1.25rem;
}

.grammar-detail-tab {
  padding: 0.6rem 1rem;
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  color: #4b5563;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.grammar-detail-tab:hover {
  color: var(--app-sea);
}

.grammar-detail-tab-active {
  color: var(--app-sea);
  border-bottom-color: var(--app-sea);
}

.grammar-detail-explanation {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  line-height: 1.6;
  color: #111827;
  white-space: pre-wrap;
}

.grammar-detail-hidden {
  display: none;
}

.grammar-detail-skip {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--app-border-light);
  border-radius: 0.5rem;
  background: var(--app-mist);
}

.grammar-detail-skip-hint {
  margin: 0;
  font-size: 0.9rem;
  color: #4b5563;
  white-space: normal;
}


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

.exercises-empty {
  color: #6b7280;
  font-style: italic;
}

.exercises-progress {
  color: #6b7280;
  font-size: 0.85rem;
  font-weight: 600;
}

.exercises-question {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  color: #111827;
}

.exercises-instruction {
  color: #6b7280;
  font-style: italic;
}

.exercises-choices,
.exercises-answer-area {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.exercises-answer-area {
  min-height: 2.5rem;
  padding: 0.5rem;
  border: 1px dashed var(--app-border);
  border-radius: 0.5rem;
}

.exercises-placeholder {
  color: #9ca3af;
  font-style: italic;
  align-self: center;
}

.exercises-choice,
.exercises-token {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--app-border);
  border-radius: 0.5rem;
  background: var(--app-surface);
  color: var(--app-ink);
  cursor: pointer;
  font-size: 0.95rem;
}

.exercises-choice:hover:not(:disabled),
.exercises-token:hover:not(:disabled) {
  border-color: var(--app-sea);
}

.exercises-choice:disabled,
.exercises-token:disabled {
  cursor: default;
  opacity: 0.6;
}

.choice-selected {
  border-color: var(--app-sea);
  background: var(--app-mist);
}

.choice-correct {
  border-color: #16a34a;
  background: #dcfce7;
  color: #14532d;
  opacity: 1;
}

.choice-incorrect {
  border-color: var(--app-danger);
  background: #fee2e2;
  color: #7f1d1d;
  opacity: 1;
}

.exercises-source {
  width: fit-content;
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
  background: var(--app-mist);
  font-weight: 700;
  font-size: 1.05rem;
}

.exercises-input {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--app-border);
  border-radius: 0.5rem;
  font-size: 0.95rem;
  font-family: var(--font-sans);
}

.exercises-correct-answer {
  color: #6b7280;
  font-size: 0.9rem;
}

.feedback-correct {
  font-weight: 700;
  color: #16a34a;
}

.feedback-incorrect {
  font-weight: 700;
  color: var(--app-danger);
}

.exercises-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 2.5rem;
}

.exercises-feedback {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.exercises-score {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.score-good {
  color: #16a34a;
  font-size: 1.1rem;
  font-weight: 700;
}

.score-medium {
  color: #b45309;
  font-size: 1.1rem;
  font-weight: 700;
}

.score-low {
  color: var(--app-danger);
  font-size: 1.1rem;
  font-weight: 700;
}

.gauge-wrap {
  position: relative;
  width: 160px;
  height: 160px;
}

.gauge {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.gauge-track {
  fill: none;
  stroke: var(--app-border-light);
  stroke-width: 10;
}

.gauge-progress-good,
.gauge-progress-medium,
.gauge-progress-low {
  fill: none;
  stroke-width: 10;
  stroke-linecap: round;
  transition: stroke-dashoffset 1.1s ease-out;
}

.gauge-progress-good {
  stroke: #16a34a;
}

.gauge-progress-medium {
  stroke: #b45309;
}

.gauge-progress-low {
  stroke: var(--app-danger);
}

.gauge-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--app-ink);
  font-size: 1.4rem;
  font-weight: 700;
}

.score-reveal {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  opacity: 1;
  transition: opacity 0.4s ease-in;
}

.score-reveal-hidden {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  opacity: 0;
  visibility: hidden;
}


.table-wrapper {
  overflow-x: auto;
}

.table-wrapper--scrollable {
  overflow-y: auto;
  border: 1px solid var(--app-border-light);
  border-radius: 0.5rem;
  background: var(--app-surface);
  backdrop-filter: blur(10px);
  max-height: calc(
    var(--table-header-height) + var(--table-visible-rows, 5) * var(--table-row-height)
  );
}

.table-wrapper--scrollable .table {
  border: none;
  border-radius: 0;
}

.table-wrapper--scrollable .table thead th {
  position: sticky;
  top: 0;
  z-index: 1;
  box-shadow: 0 1px 0 var(--app-border-light);
}

.table-wrapper--compact {
  --table-header-height: 2rem;
  --table-row-height: 1.625rem;
}

.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--app-surface);
  backdrop-filter: blur(10px);
  border: 1px solid var(--app-border-light);
  border-radius: 0.5rem;
}

.table th, .table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--app-border-light);
}

.table th {
  background: #f0f5f4;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--app-ink);
}

.table--compact th, .table--compact td {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.2;
}

.table--compact thead tr {
  height: var(--table-header-height);
}

.table--compact tbody tr {
  height: var(--table-row-height);
}

.table--compact .table-row-actions :global(.btn) {
  padding: 0.125rem 0.5rem;
  font-size: 0.75rem;
}

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

.table tbody tr:hover {
  background: var(--app-bg);
}

.table-actions-header {
  width: 1%;
}

.table-actions {
  width: 1%;
  white-space: nowrap;
  text-align: right;
}

.table-row-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.5rem;
}

.table-row-actions :global(.btn) {
  opacity: 0;
  transition: opacity 0.15s ease, background-color 0.15s ease;
}

.table-row:hover .table-row-actions :global(.btn) {
  opacity: 1;
}

.table-empty, :global(.table-error) {
  margin: 0;
}


.tableWrap {
  display: block;
  overflow-x: auto;
  margin: 0.5rem 0;
  white-space: normal;
}

.table {
  border-collapse: collapse;
  width: 100%;
}

.table th,
.table td {
  border: 1px solid var(--app-border);
  padding: 0.4rem 0.65rem;
  text-align: left;
  vertical-align: top;
}

.table th {
  background: var(--app-mist);
  font-weight: 700;
}

.callout {
  margin: 0.5rem 0;
  padding: 0.65rem 0.85rem;
  border-left: 4px solid var(--app-sea);
  background: var(--app-mist);
  border-radius: 0 0.4rem 0.4rem 0;
  white-space: pre-wrap;
}

.calloutLabel {
  display: block;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.callout--tip,
.callout--note {
  border-left-color: var(--app-sea);
}

.callout--important {
  border-left-color: var(--app-accent);
}

.callout--warning,
.callout--caution {
  border-left-color: var(--app-danger);
}

.lenticular {
  color: #2563eb;
  font-weight: inherit;
}



.wizard-word-cell-primary { margin: 0; font-weight: 700; color: var(--app-ink); }
.wizard-word-cell-definition { margin: 0.15rem 0 0; color: #4b5563; font-size: 0.85rem; }
.explanation-para { margin: 0; }