frontend/src/App.css

.fc-app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 20px 60px;
}

/* ── Header ─────────────────────────────────────────────────────────────── */
.fc-header {
  background: linear-gradient(135deg, var(--fc-blue-dark) 0%, var(--fc-blue) 55%, var(--fc-blue-light) 100%);
  border-radius: 16px;
  padding: 18px 24px 16px;
  box-shadow: 0 4px 14px rgba(0, 35, 149, 0.22);
}

.fc-header-text h1 {
  color: #fff;
  font-size: 2.1rem;
  font-weight: 700;
  margin: 0;
}

.fc-header-text p {
  color: #d6e0ff;
  font-size: 0.92rem;
  margin: 4px 0 0;
}

.fc-tricolor-bar {
  height: 5px;
  border-radius: 0 0 6px 6px;
  margin: 0 0 18px;
  background: linear-gradient(90deg, var(--fc-blue) 0 33.33%, #ffffff 33.33% 66.66%, var(--fc-red) 66.66% 100%);
}

/* ── Tab nav ────────────────────────────────────────────────────────────── */
.fc-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  border-bottom: 1px solid var(--fc-border);
  margin-bottom: 18px;
}

.fc-tab {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  padding: 10px 16px;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  color: var(--fc-muted);
  cursor: pointer;
  transition: color 0.12s, border-color 0.12s;
}

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

.fc-tab-active {
  color: var(--fc-blue);
  border-bottom-color: var(--fc-red);
  font-weight: 700;
}

/* ── Shared building blocks ────────────────────────────────────────────── */
.fc-card {
  background: #fff;
  border: 1px solid var(--fc-border);
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: var(--fc-card-shadow);
}

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

.fc-error {
  color: var(--fc-red);
}

.fc-pill {
  display: inline-block;
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--fc-blue);
  background: rgba(0, 35, 149, 0.08);
  border-radius: 999px;
  padding: 2px 10px;
}

/* ── Lessons grid ───────────────────────────────────────────────────────── */
.fc-lesson-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 14px;
}

.fc-lesson-card {
  text-align: left;
  background: #fff;
  border: 1px solid var(--fc-border);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  font-family: inherit;
  box-shadow: var(--fc-card-shadow);
  transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.fc-lesson-card:hover {
  border-color: var(--fc-blue);
  box-shadow: 0 2px 10px rgba(0, 35, 149, 0.12);
  transform: translateY(-1px);
}

.fc-lesson-card-title {
  font-weight: 600;
  font-size: 0.96rem;
  color: var(--fc-ink);
}

.fc-lesson-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--fc-muted);
}

.fc-lesson-card-preview {
  font-size: 0.82rem;
  color: #999;
  line-height: 1.4;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
}

/* ── Form controls ──────────────────────────────────────────────────────── */
.fc-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.fc-input,
.fc-textarea {
  width: 100%;
  border: 1px solid var(--fc-border);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 0.95rem;
  background: #fff;
  color: var(--fc-ink);
  outline: none;
  transition: border-color 0.12s;
}

.fc-input {
  flex: 1 1 160px;
}

.fc-input:focus,
.fc-textarea:focus {
  border-color: var(--fc-blue);
}

.fc-title-input {
  flex: 1;
}

.fc-textarea {
  resize: vertical;
  font-family: inherit;
  line-height: 1.5;
  margin-bottom: 12px;
}

.fc-btn {
  border: 1px solid var(--fc-border);
  background: #fff;
  border-radius: 8px;
  padding: 9px 16px;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--fc-ink);
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s, color 0.12s;
}

.fc-btn:hover {
  border-color: var(--fc-blue);
}

.fc-btn-primary {
  background: var(--fc-blue);
  border-color: var(--fc-blue);
  color: #fff;
}

.fc-btn-primary:hover {
  background: var(--fc-blue-dark);
  border-color: var(--fc-blue-dark);
}

.fc-btn-secondary {
  background: #f5f5f5;
}

.fc-btn-danger-outline {
  color: var(--fc-red);
  border-color: rgba(237, 41, 57, 0.4);
}

.fc-btn-danger {
  background: var(--fc-red);
  border-color: var(--fc-red);
  color: #fff;
}

.fc-checkbox {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--fc-ink);
  cursor: pointer;
}

.fc-status {
  font-size: 0.9rem;
  margin-bottom: 12px;
  color: var(--fc-blue);
}

.fc-status.fc-error {
  color: var(--fc-red);
}

.fc-confirm-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 8px;
  padding: 10px 14px;
  margin-bottom: 12px;
  font-size: 0.9rem;
}

/* ── Notebook ───────────────────────────────────────────────────────────── */
.fc-notebook {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 20px;
  align-items: start;
}

.fc-annotated {
  margin-top: 4px;
}

.fc-notebook-side h3 {
  margin: 0 0 10px;
  font-size: 1rem;
  color: var(--fc-ink);
}

.fc-word-card-text {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.fc-word-card-table {
  font-size: 0.92rem;
  border-collapse: collapse;
  width: 100%;
}

.fc-word-card-table td {
  padding: 3px 8px 3px 0;
  vertical-align: top;
}

.fc-word-card-table td:first-child {
  color: var(--fc-muted);
  white-space: nowrap;
}

.fc-grammar {
  font-style: italic;
}

@media (max-width: 760px) {
  .fc-notebook {
    grid-template-columns: 1fr;
  }
}

/* ── Lessons sub-tabs + groups ──────────────────────────────────────────── */
.fc-subtabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
}

.fc-subtab {
  background: #fff;
  border: 1px solid var(--fc-border);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
  color: var(--fc-muted);
  cursor: pointer;
  transition: border-color 0.12s, color 0.12s;
}

.fc-subtab:hover {
  color: var(--fc-blue);
}

.fc-subtab-active {
  color: #fff;
  background: var(--fc-blue);
  border-color: var(--fc-blue);
  font-weight: 600;
}

.fc-group {
  margin-bottom: 16px;
}

.fc-group-summary {
  cursor: pointer;
  padding: 6px 2px;
  font-weight: 700;
  font-size: 0.84rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--fc-blue);
  list-style: none;
  user-select: none;
}

.fc-group-summary::-webkit-details-marker {
  display: none;
}

.fc-group .fc-lesson-grid {
  margin-top: 8px;
}

/* ── Resources ──────────────────────────────────────────────────────────── */
.fc-resources {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.fc-resource-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.fc-resource-header-actions {
  margin-bottom: 0;
  flex-wrap: nowrap;
}

.fc-resource-title {
  margin: 0;
  font-size: 1.05rem;
  color: var(--fc-blue);
  font-weight: 700;
}

.fc-link-edit-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fc-link-edit-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.fc-link-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 10px;
}

.fc-link-card {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--fc-border);
  border-radius: 8px;
  text-decoration: none;
  color: inherit;
  background: var(--fc-paper);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.fc-link-card:hover {
  border-color: var(--fc-blue);
  box-shadow: 0 2px 8px rgba(0, 35, 149, 0.1);
}

.fc-link-favicon {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  flex-shrink: 0;
}

.fc-link-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.fc-link-label {
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--fc-ink);
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fc-link-domain {
  font-size: 0.74rem;
  color: var(--fc-muted);
  margin-top: 1px;
}

.fc-book-list {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.fc-book-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 12px;
  border-radius: 8px;
  background: var(--fc-paper);
}

.fc-book-icon {
  font-size: 1.05rem;
  line-height: 1.5;
}

.fc-book-title {
  font-weight: 600;
  font-size: 0.86rem;
  color: var(--fc-ink);
  display: block;
}

.fc-book-meta {
  font-size: 0.76rem;
  color: var(--fc-muted);
  display: block;
  margin-top: 1px;
  text-transform: capitalize;
}

/* ── Exercises ──────────────────────────────────────────────────────────── */
.fc-visual-preview {
  max-width: 100%;
  max-height: 320px;
  border-radius: 10px;
  border: 1px solid var(--fc-border);
}

.fc-visual-summary {
  font-style: italic;
}

.fc-exercises-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 20px;
  align-items: start;
}

.fc-tools-panel {
  position: sticky;
  top: 16px;
}

@media (max-width: 900px) {
  .fc-exercises-layout {
    grid-template-columns: 1fr;
  }

  .fc-tools-panel {
    position: static;
  }
}

.fc-mic-btn.fc-mic-listening {
  border-color: var(--fc-blue);
  color: var(--fc-blue);
  font-weight: 600;
  animation: fc-pulse 1.1s ease-in-out infinite;
}

@keyframes fc-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.55; }
}

/* ── Coach Agent exercise set ──────────────────────────────────────────── */
.fc-coach-item {
  margin-top: 4px;
}

.fc-coach-progress {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.fc-coach-instruction {
  font-size: 0.9rem;
  color: var(--fc-muted);
  margin: 0 0 6px;
}

.fc-coach-content {
  font-size: 1.2rem;
  font-family: Georgia, serif;
  margin: 0 0 10px;
}

.fc-coach-content-en {
  font-style: italic;
  color: var(--fc-ink);
}

.fc-coach-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
}

.fc-coach-option {
  text-align: left;
  border: 1px solid var(--fc-border);
  border-radius: 8px;
  padding: 10px 14px;
  background: #fff;
  font-size: 0.95rem;
  font-family: Georgia, serif;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}

.fc-coach-option:hover {
  border-color: var(--fc-blue);
}

.fc-coach-option-selected {
  border-color: var(--fc-blue);
  background: rgba(0, 35, 149, 0.06);
  font-weight: 600;
}

.fc-coach-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.fc-coach-chips-answer {
  min-height: 42px;
  padding: 8px;
  border: 1px dashed var(--fc-border);
  border-radius: 8px;
  align-items: center;
}

.fc-coach-chip {
  border: 1px solid var(--fc-border);
  border-radius: 999px;
  padding: 6px 14px;
  background: #fff;
  font-size: 0.95rem;
  font-family: Georgia, serif;
  cursor: pointer;
  transition: border-color 0.12s, background 0.12s;
}

.fc-coach-chip-chosen {
  border-color: var(--fc-blue);
  background: rgba(0, 35, 149, 0.06);
}

.fc-coach-feedback {
  border-left: 4px solid var(--fc-blue);
  background: rgba(0, 35, 149, 0.06);
  border-radius: 0 8px 8px 0;
  padding: 12px 16px;
  font-size: 0.92rem;
  margin-top: 4px;
}

.fc-coach-feedback-correct {
  border-left-color: #2e7d32;
  background: rgba(46, 125, 50, 0.08);
}

.fc-coach-feedback-title {
  font-weight: 600;
  margin-bottom: 4px;
}

.fc-coach-feedback-answer {
  margin-top: 6px;
  font-size: 0.85rem;
  color: var(--fc-muted);
}

/* ── Chat coach ─────────────────────────────────────────────────────────── */
.fc-chat-messages {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 50vh;
  overflow-y: auto;
  padding: 4px 2px 12px;
  margin-bottom: 4px;
}

.fc-chat-msg {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 0.95rem;
  line-height: 1.45;
  white-space: pre-wrap;
}

.fc-chat-msg-assistant {
  align-self: flex-start;
  background: var(--fc-paper);
  border: 1px solid var(--fc-border);
  border-bottom-left-radius: 2px;
}

.fc-chat-msg-user {
  align-self: flex-end;
  background: var(--fc-blue);
  color: #fff;
  border-bottom-right-radius: 2px;
}

.fc-chat-speak-btn {
  display: block;
  margin-top: 6px;
  border: none;
  background: none;
  padding: 0;
  font-size: 0.78rem;
  color: var(--fc-blue);
  cursor: pointer;
  transition: color 0.12s;
}

.fc-chat-speak-btn:hover {
  color: var(--fc-blue-dark);
  text-decoration: underline;
}

/* ── Summary ────────────────────────────────────────────────────────────── */
.fc-summary {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 640px;
}

.fc-summary-points {
  text-align: center;
  background: linear-gradient(135deg, var(--fc-blue-dark) 0%, var(--fc-blue) 55%, var(--fc-blue-light) 100%);
  color: #fff;
  box-shadow: 0 4px 14px rgba(0, 35, 149, 0.18);
}

.fc-summary-points-value {
  font-size: 2.4rem;
  font-weight: 700;
}

.fc-summary-points-label {
  font-size: 0.9rem;
  opacity: 0.85;
  margin-top: 2px;
}

.fc-summary-text p {
  margin: 0 0 10px;
  line-height: 1.6;
}

.fc-summary-text p:last-child {
  margin-bottom: 0;
}

.fc-summary-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 12px;
}

.fc-stat-card {
  text-align: center;
  padding: 12px 10px;
}

.fc-stat-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--fc-blue);
}

.fc-stat-label {
  font-size: 0.78rem;
  color: var(--fc-muted);
  margin-top: 2px;
}

.fc-summary-progress {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.fc-progress-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--fc-ink);
}

.fc-progress-bar {
  height: 10px;
  border-radius: 999px;
  background: var(--fc-border);
  overflow: hidden;
}

.fc-progress-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--fc-blue) 0%, var(--fc-blue-light) 100%);
  transition: width 0.3s ease;
}

.fc-summary-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.fc-summary-next {
  font-size: 0.92rem;
  color: var(--fc-ink);
}

/* ── Loading / empty states ────────────────────────────────────────────── */
.fc-empty {
  text-align: center;
  padding: 28px 20px;
  border: 1px dashed var(--fc-border);
  border-radius: 12px;
  background: #fff;
  color: var(--fc-muted);
  font-size: 0.92rem;
  line-height: 1.5;
}

.fc-spinner {
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-right: 8px;
  vertical-align: -2px;
  border: 2px solid var(--fc-border);
  border-top-color: var(--fc-blue);
  border-radius: 50%;
  animation: fc-spin 0.7s linear infinite;
}

@keyframes fc-spin {
  to { transform: rotate(360deg); }
}

/* ── Tools: small inline icon button (speak) ───────────────────────────── */
.fc-btn-icon {
  padding: 2px 8px;
  font-size: 0.85rem;
  margin-left: 8px;
  vertical-align: middle;
}

/* ── Gender Checker ─────────────────────────────────────────────────────── */
.fc-gender-result {
  max-width: 480px;
}

.fc-gender-headword {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.fc-gender-pills {
  margin-bottom: 12px;
}

.fc-gender-example {
  margin-bottom: 10px;
}

.fc-gender-example-fr {
  font-size: 1.05rem;
  margin-bottom: 2px;
}

.fc-gender-pattern {
  font-size: 0.9rem;
  color: var(--fc-blue);
  background: rgba(0, 35, 149, 0.06);
  border-radius: 8px;
  padding: 8px 12px;
}

/* ── Translator ─────────────────────────────────────────────────────────── */
.fc-translate-result {
  max-width: 560px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--fc-border);
}

.fc-translator-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
}

.fc-translator-widget {
  position: relative;
}

.fc-translator-remove {
  position: absolute;
  top: 12px;
  right: 12px;
}

.fc-translate-main {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.fc-translate-alts {
  font-size: 0.92rem;
  margin-bottom: 10px;
}

.fc-translate-example {
  font-size: 0.95rem;
  border-top: 1px solid var(--fc-border);
  padding-top: 10px;
  line-height: 1.6;
}

/* ── Mobile ─────────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .fc-app {
    padding: 12px 12px 48px;
  }

  .fc-header {
    padding: 14px 16px 12px;
    border-radius: 12px;
  }

  .fc-header-text h1 {
    font-size: 1.5rem;
  }

  .fc-header-text p {
    font-size: 0.84rem;
  }

  .fc-tab {
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  .fc-card {
    padding: 14px 16px;
  }

  .fc-chat-msg {
    max-width: 92%;
  }
}

/* ── Block editor (Notion-style notebook) ──────────────────────────────── */
.fc-block-editor {
  position: relative;
  border: 1px solid var(--fc-border);
  border-radius: 8px;
  background: #fff;
  padding: 12px 14px;
  margin-bottom: 12px;
  min-height: 160px;
}

.fc-block {
  outline: none;
  border-radius: 4px;
  padding: 2px 4px;
  margin: 2px 0;
  line-height: 1.6;
}

.fc-block:focus {
  background: rgba(0, 35, 149, 0.03);
}

.fc-block[data-placeholder]:empty::before {
  content: attr(data-placeholder);
  color: var(--fc-muted);
  pointer-events: none;
}

h1.fc-block {
  font-size: 1.6rem;
  font-weight: 700;
  margin-top: 14px;
}

h2.fc-block {
  font-size: 1.3rem;
  font-weight: 700;
  margin-top: 12px;
}

h3.fc-block {
  font-size: 1.1rem;
  font-weight: 600;
  margin-top: 10px;
}

blockquote.fc-block {
  border-left: 3px solid var(--fc-blue);
  background: rgba(0, 35, 149, 0.05);
  border-radius: 0 8px 8px 0;
  padding: 8px 12px;
  font-style: italic;
}

hr.fc-block-divider {
  border: none;
  border-top: 1px solid var(--fc-border);
  margin: 14px 4px;
}

.fc-block-list {
  margin: 2px 0;
  padding-left: 26px;
}

li.fc-block {
  padding: 1px 4px;
}

.fc-block mark {
  background: rgba(253, 191, 45, 0.45);
  border-radius: 2px;
  padding: 0 1px;
}

/* ── Slash command menu ─────────────────────────────────────────────────── */
.fc-slash-menu {
  position: absolute;
  z-index: 20;
  min-width: 190px;
  max-height: 260px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--fc-border);
  border-radius: 8px;
  box-shadow: var(--fc-card-shadow);
  padding: 4px;
}

.fc-slash-menu-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  border-radius: 6px;
  font-size: 0.88rem;
  color: var(--fc-ink);
  cursor: pointer;
}

.fc-slash-menu-item:hover,
.fc-slash-menu-item-active {
  background: rgba(0, 35, 149, 0.06);
  color: var(--fc-blue);
}

.fc-slash-menu-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  font-weight: 700;
  font-size: 0.8rem;
  color: var(--fc-muted);
}

/* ── Floating selection toolbar ─────────────────────────────────────────── */
.fc-floating-toolbar {
  position: absolute;
  z-index: 20;
  display: flex;
  gap: 2px;
  background: var(--fc-ink);
  border-radius: 8px;
  padding: 4px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
  transform: translateX(-50%);
}

.fc-floating-toolbar-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border: none;
  border-radius: 4px;
  background: none;
  color: #fff;
  font-size: 0.85rem;
  cursor: pointer;
}

.fc-floating-toolbar-btn:hover {
  background: rgba(255, 255, 255, 0.15);
}

.fc-floating-toolbar-turninto {
  width: auto;
  padding: 0 8px;
  font-size: 0.8rem;
  white-space: nowrap;
}

.fc-floating-toolbar-sep {
  width: 1px;
  margin: 4px 2px;
  background: rgba(255, 255, 255, 0.2);
}

.fc-turn-into-menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  z-index: 21;
  min-width: 170px;
  max-height: 260px;
  overflow-y: auto;
  background: #fff;
  border: 1px solid var(--fc-border);
  border-radius: 8px;
  box-shadow: var(--fc-card-shadow);
  padding: 4px;
}