:root {
  color-scheme: light;
  --paper: #f3ead4;
  --paper-edge: #e9dfc4;
  --card: #fbf6e6;
  --card-2: #fffcef;
  --ink: #1d1812;
  --ink-soft: #4a4034;
  --muted: #7a6c5a;
  --rule: #c4b693;
  --rule-soft: #d9cda9;
  --marigold: #d49126;
  --marigold-soft: #f1c977;
  --tomato: #c8472e;
  --moss: #6b8e23;
  --plum: #7a3b5c;

  --serif: "Iowan Old Style", "Palatino Linotype", "Book Antiqua", Palatino, "Hoefler Text", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, "Cascadia Mono", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    radial-gradient(rgba(120, 95, 50, 0.05) 1px, transparent 1.4px),
    radial-gradient(rgba(120, 95, 50, 0.04) 1px, transparent 1.4px);
  background-size: 22px 22px, 22px 22px;
  background-position: 0 0, 11px 11px;
  font-size: 14.5px;
  line-height: 1.5;
}

button, input, textarea, select { font: inherit; color: inherit; }
button { border: 0; cursor: pointer; background: none; }

/* --- shell --- */

.app-shell {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
}

.sidebar {
  border-right: 1.5px solid var(--rule);
  background: linear-gradient(180deg, var(--paper) 0%, var(--paper-edge) 100%);
  padding: 22px 20px 28px;
  overflow-y: auto;
}

/* --- brand --- */

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-bottom: 18px;
  margin-bottom: 18px;
  border-bottom: 1.5px dashed var(--rule);
}

.brand-mark {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  color: var(--tomato);
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  box-shadow: 2px 2px 0 var(--ink);
  flex-shrink: 0;
}

.brand-mark svg { width: 28px; height: 28px; display: block; }

.brand h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 26px;
  letter-spacing: -0.01em;
  line-height: 1;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 12.5px;
  font-style: italic;
  line-height: 1.35;
}

/* --- tabs (notebook flap style) --- */

.tabs {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 22px;
}

.tab-btn {
  padding: 10px 4px 12px;
  text-align: left;
  font-family: var(--serif);
  font-size: 20px;
  color: var(--ink-soft);
  border-bottom: 1px dotted transparent;
  transition: color 120ms;
}

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

.tab-btn.active {
  color: var(--ink);
  text-decoration: underline wavy var(--marigold);
  text-decoration-thickness: 2.5px;
  text-underline-offset: 7px;
}

/* --- panels --- */

.panel {
  background: var(--card);
  border: 1.5px solid var(--rule);
  border-radius: 6px;
  padding: 14px 16px 16px;
  margin-bottom: 16px;
  box-shadow: 2px 2px 0 rgba(29, 24, 18, 0.06);
}

.panel-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}

.panel h2, .panel-title h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* --- form fields --- */

label {
  display: grid;
  gap: 5px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 12px;
}

input, textarea, select {
  width: 100%;
  border: 1.5px solid var(--rule);
  border-radius: 4px;
  background: var(--card-2);
  color: var(--ink);
  padding: 9px 11px;
  outline: none;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 400;
  letter-spacing: 0;
  text-transform: none;
  transition: border-color 120ms, box-shadow 120ms;
}

textarea { resize: vertical; line-height: 1.55; }

input:hover, textarea:hover, select:hover { border-color: var(--ink-soft); }

input:focus, textarea:focus, select:focus {
  border-color: var(--ink);
  box-shadow: 2px 2px 0 var(--marigold-soft);
}

select {
  appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%), linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
  background-position: calc(100% - 16px) 50%, calc(100% - 11px) 50%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  padding-right: 28px;
}

/* --- buttons --- */

.primary-btn, .secondary-btn, .danger-btn, .icon-btn {
  min-height: 36px;
  padding: 0 14px;
  border-radius: 4px;
  border: 1.5px solid var(--ink);
  background: var(--card-2);
  color: var(--ink);
  font-family: var(--sans);
  font-weight: 600;
  font-size: 13px;
  letter-spacing: 0.02em;
  box-shadow: 2px 2px 0 var(--ink);
  transition: transform 80ms, box-shadow 80ms;
}

.primary-btn:hover, .secondary-btn:hover, .danger-btn:hover, .icon-btn:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--ink);
}

.primary-btn:active, .secondary-btn:active, .danger-btn:active, .icon-btn:active {
  transform: translate(1px, 1px);
  box-shadow: 0 0 0 var(--ink);
}

.primary-btn {
  background: var(--marigold);
  color: var(--ink);
}

.danger-btn {
  background: var(--card-2);
  color: var(--tomato);
  border-color: var(--tomato);
  box-shadow: 2px 2px 0 var(--tomato);
}

.danger-btn:hover { box-shadow: 3px 3px 0 var(--tomato); }
.danger-btn:active { box-shadow: 0 0 0 var(--tomato); }

.icon-btn {
  width: 36px;
  padding: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
}

#generatePlanBtn { width: 100%; margin-top: 14px; }

/* --- workspace --- */

.workspace {
  min-width: 0;
  height: 100vh;
  max-height: 100vh;
  overflow: hidden;
  background: var(--paper);
}

.view {
  display: none;
  height: 100vh;
  min-width: 0;
}

.view.active {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  height: 100vh;
  min-height: 0;
}

#roleplayView.active {
  grid-template-rows: auto auto auto minmax(0, 1fr) auto;
}

.chat-tabs {
  display: flex;
  gap: 6px;
  padding: 10px 28px;
  border-bottom: 1.5px solid var(--rule);
  background: var(--paper-edge);
  overflow-x: auto;
  white-space: nowrap;
}

.chat-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px 5px 12px;
  border: 1.5px solid var(--rule);
  border-radius: 999px;
  background: var(--card-2);
  font-family: var(--serif);
  font-size: 12.5px;
  color: var(--ink-soft);
  flex-shrink: 0;
  cursor: pointer;
  max-width: 240px;
}

.chat-tab:hover { border-color: var(--ink-soft); color: var(--ink); }

.chat-tab.active {
  background: var(--marigold-soft);
  border-color: var(--ink);
  color: var(--ink);
}

.chat-tab-new {
  border-style: dashed;
  color: var(--tomato);
  font-weight: 700;
}

.chat-tab-label {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 160px;
}

.chat-tab-meta {
  font-style: italic;
  color: var(--muted);
  font-size: 11px;
}

.chat-tab-del {
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  margin-left: 2px;
  border-radius: 50%;
  color: var(--muted);
  font-weight: 700;
  font-size: 14px;
  line-height: 1;
}

.chat-tab-del:hover {
  background: var(--tomato);
  color: var(--paper);
}

#vocabView.active {
  grid-template-rows: auto auto minmax(0, 1fr);
}

#settingsView.active {
  display: block;
  overflow-y: auto;
}

#settingsView .settings-grid {
  padding-bottom: 18px;
}

#settingsView > .panel.compact {
  margin: 4px 28px 28px;
}

.workspace-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 14px;
  padding: 16px 28px 12px;
  border-bottom: 1.5px solid var(--rule);
}

.workspace-header p {
  margin: 0 0 3px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
}

.workspace-header h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 24px;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.header-actions, .lesson-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

/* --- plan layout --- */

.plan-layout {
  display: flex;
  min-height: 0;
  height: 100%;
  overflow: hidden;
}

.plan-layout > .lesson-sidebar {
  width: 260px;
  flex-shrink: 0;
}

.plan-layout > .lesson-pane {
  flex: 1 1 0;
  min-width: 0;
}

.lesson-sidebar {
  padding: 18px 16px;
  border-right: 1.5px dashed var(--rule);
  overflow-y: auto;
  background: var(--paper-edge);
  min-height: 0;
  height: 100%;
}

.lesson-sidebar .panel-title { margin-bottom: 10px; padding: 0 4px; }

.lesson-editor, .editor-panel {
  min-width: 0;
  overflow-y: auto;
  padding: 22px 28px 32px;
}

.lesson-card, .editor-panel {
  margin-top: 16px;
  padding: 18px 20px 20px;
  background: var(--card-2);
  border: 1.5px solid var(--rule);
  border-radius: 6px;
  box-shadow: 3px 3px 0 rgba(29, 24, 18, 0.07);
}

.form-grid { display: grid; gap: 14px; }

.form-grid.two,
.practice-setup,
.settings-grid,
.split-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.settings-grid {
  padding: 22px 28px 4px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

@media (min-width: 1180px) {
  .settings-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 1500px) {
  .settings-grid { grid-template-columns: repeat(5, minmax(0, 1fr)); }
}

.split-layout {
  grid-template-columns: 300px minmax(0, 1fr);
  grid-template-rows: minmax(0, 1fr);
  padding: 22px 28px;
  overflow-y: auto;
  height: 100%;
}

.practice-setup {
  padding: 18px 28px;
  border-bottom: 1.5px solid var(--rule);
  background: var(--paper-edge);
}

.wide { grid-column: 1 / -1; }

/* --- list cards (saved plans, lessons, characters) --- */

.stack-list { display: grid; gap: 8px; }

.list-card {
  display: grid;
  gap: 3px;
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--rule);
  border-left-width: 4px;
  border-radius: 4px;
  background: var(--card-2);
  color: var(--ink);
  text-align: left;
  transition: transform 100ms, border-color 100ms, background 100ms;
}

.list-card:hover {
  border-color: var(--ink-soft);
  transform: translateX(2px);
}

.list-card.active {
  background: var(--marigold-soft);
  border-color: var(--ink);
  border-left-color: var(--tomato);
}

.list-card strong, .list-card span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  display: block;
}

.list-card strong {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
}

.list-card span {
  color: var(--muted);
  font-size: 12px;
  font-style: italic;
}

.list-card.active span { color: var(--ink-soft); }

/* --- chat: messages & bubbles --- */

.messages {
  overflow-y: auto;
  padding: 26px 28px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  background-image: repeating-linear-gradient(
    to bottom,
    transparent 0,
    transparent 31px,
    rgba(122, 108, 90, 0.12) 31px,
    rgba(122, 108, 90, 0.12) 32px
  );
}

.empty-state {
  margin: auto;
  max-width: 480px;
  color: var(--muted);
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  line-height: 1.55;
}

.message {
  display: grid;
  grid-template-columns: 40px minmax(0, 720px);
  gap: 12px;
  align-items: start;
}

.message.user {
  grid-template-columns: minmax(0, 720px) 40px;
  justify-content: end;
}

.message.user .avatar { grid-column: 2; }
.message.user .bubble { grid-column: 1; }

.avatar {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  color: var(--ink);
  font-family: var(--serif);
  font-weight: 700;
  font-size: 15px;
  box-shadow: 2px 2px 0 var(--ink);
}

.message.user .avatar { background: var(--marigold); }
.message.system .avatar { background: #e8d2dd; }
.message.correction .avatar { background: var(--marigold-soft); }

.bubble {
  position: relative;
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 14px 14px 14px 4px;
  padding: 12px 14px;
  line-height: 1.55;
  white-space: pre-wrap;
  box-shadow: 2px 2px 0 var(--ink);
}

.message.user .bubble {
  background: #f3e0c4;
  border-radius: 14px 14px 4px 14px;
}

.message.correction .bubble {
  background: #fdf2d8;
  border-color: var(--marigold);
  box-shadow: 2px 2px 0 var(--marigold);
}

.message.system .bubble {
  background: #f6e7ee;
  border-color: var(--plum);
  box-shadow: 2px 2px 0 var(--plum);
}

.bubble header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  padding-bottom: 5px;
  border-bottom: 1px dashed var(--rule);
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 600;
}

/* --- composer --- */

.composer {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 12px;
  padding: 18px 28px 22px;
  border-top: 1.5px solid var(--rule);
  background: var(--paper-edge);
}

#messageInput {
  min-height: 48px;
  max-height: 160px;
}

#sendBtn { min-width: 88px; }

/* --- settings: model panels feel like file cards --- */

#settingsView .panel { background: var(--card); }

#settingsView input {
  font-family: var(--mono);
  font-size: 12.5px;
}

#settingsView label {
  letter-spacing: 0.06em;
}

#settingsView .panel.compact:not(.settings-grid > *) {
  margin: 18px 28px 28px;
}

/* --- responsive --- */

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    height: auto;
    max-height: none;
    overflow: visible;
  }

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

  .plan-layout {
    flex-direction: column;
  }

  .plan-layout > .lesson-sidebar {
    width: auto;
  }

  .workspace, .view {
    max-height: none;
    height: auto;
  }

  .sidebar, .lesson-sidebar {
    border-right: 0;
    border-bottom: 1.5px solid var(--rule);
  }

  .workspace-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .workspace-header h2 { font-size: 24px; }

  .form-grid.two,
  .practice-setup,
  .settings-grid {
    grid-template-columns: 1fr;
  }

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

/* --- lesson pane: study / edit toggle --- */

.lesson-pane {
  min-width: 0;
  min-height: 0;
  height: 100%;
  overflow-y: auto;
  padding: 0 0 32px;
}

.lesson-toolbar {
  position: sticky;
  top: 0;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 10px 28px;
  background: var(--paper);
  border-bottom: 1.5px dashed var(--rule);
  flex-wrap: wrap;
}

.lesson-toolbar-actions { display: flex; gap: 8px; flex-wrap: wrap; }

.mode-toggle {
  display: inline-flex;
  border: 1.5px solid var(--ink);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 2px 2px 0 var(--ink);
}

.mode-btn {
  padding: 7px 16px;
  font-family: var(--serif);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink-soft);
  background: var(--card-2);
  border: 0;
  border-right: 1.5px solid var(--ink);
}

.mode-btn:last-child { border-right: 0; }
.mode-btn:hover { color: var(--ink); background: var(--card); }
.mode-btn.active { background: var(--ink); color: var(--paper); }

/* --- study mode --- */

.lesson-study { padding: 24px 36px 28px; max-width: 780px; }

.study-header { margin-bottom: 18px; }

.study-kicker {
  margin: 0 0 4px;
  color: var(--muted);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 600;
}

.study-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 28px;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.study-intro {
  margin: 0 0 24px;
  font-family: var(--serif);
  font-size: 18px;
  font-style: italic;
  line-height: 1.55;
  color: var(--ink-soft);
  padding-left: 14px;
  border-left: 3px solid var(--marigold);
}

.study-section { margin-bottom: 28px; }

.study-section h4 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
  position: relative;
  padding-bottom: 4px;
}

.study-section h4::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 38px;
  height: 3px;
  background: var(--marigold);
  border-radius: 2px;
}

.study-body p {
  margin: 0 0 12px;
  line-height: 1.65;
  font-size: 15px;
  color: var(--ink);
}

.study-body p:last-child { margin-bottom: 0; }

/* alphabet / phoneme chart */

.study-alphabet {
  margin: 0 0 28px;
}

.study-alphabet h4 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.alphabet-group {
  margin: 18px 0 8px;
  font-family: var(--serif);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--tomato);
}

.alphabet-group:first-child { margin-top: 0; }

.alphabet-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 2px 2px 0 var(--ink);
  margin-bottom: 12px;
}

.alphabet-table th {
  background: var(--paper-edge);
  font-family: var(--serif);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--muted);
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1.5px solid var(--ink);
}

.alphabet-table td {
  padding: 10px 12px;
  font-size: 14px;
  vertical-align: middle;
  border-bottom: 1px solid var(--rule-soft);
}

.alphabet-table tr:last-child td { border-bottom: 0; }

.alphabet-char {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  width: 60px;
  text-align: center;
  color: var(--ink);
}

.alphabet-ipa {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
  white-space: nowrap;
}

.alphabet-roman {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
}

.alphabet-note {
  font-style: italic;
  color: var(--muted);
  font-size: 13px;
}

/* vocab table */

.study-vocab, .study-exercises { margin-bottom: 28px; }

.study-vocab h4, .study-exercises h4 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.vocab-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 2px 2px 0 var(--ink);
}

.vocab-table th,
.vocab-table td {
  padding: 10px 12px;
  text-align: left;
  font-size: 13.5px;
  vertical-align: top;
  border-bottom: 1px solid var(--rule-soft);
}

.vocab-table tr:last-child td { border-bottom: 0; }

.vocab-table th {
  background: var(--paper-edge);
  font-family: var(--serif);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--muted);
  border-bottom: 1.5px solid var(--ink);
}

.vocab-table td strong {
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 700;
  display: block;
}

.vocab-table td em {
  display: block;
  font-style: italic;
  font-size: 11.5px;
  color: var(--muted);
  margin-top: 2px;
}

/* exercises */

.exercise-card {
  background: var(--card-2);
  border: 1.5px solid var(--rule);
  border-left: 4px solid var(--marigold);
  border-radius: 4px;
  padding: 12px 14px;
  margin-bottom: 10px;
  box-shadow: 2px 2px 0 rgba(29, 24, 18, 0.07);
}

.exercise-prompt {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  font-size: 15px;
  line-height: 1.55;
}

.exercise-num {
  font-family: var(--serif);
  font-weight: 700;
  color: var(--tomato);
  flex-shrink: 0;
}

.exercise-hint {
  margin: 8px 0 0 22px;
  font-style: italic;
  font-size: 13px;
  color: var(--muted);
}

.exercise-answer {
  margin: 10px 0 0 22px;
  padding: 8px 12px;
  background: var(--paper-edge);
  border-left: 3px solid var(--moss);
  font-size: 14px;
  color: var(--ink);
  border-radius: 0 4px 4px 0;
}

.exercise-card .secondary-btn.small {
  margin: 10px 0 0 22px;
}

/* --- practice placeholder (while exercises generate) --- */

.practice-placeholder {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 20px;
  padding: 14px 18px;
  background: var(--card);
  border: 1.5px dashed var(--rule);
  border-radius: 6px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 14px;
  color: var(--muted);
}

.practice-placeholder .loading-dot { background: var(--tomato); }

/* --- scenario card --- */

.scenario-card {
  margin: 0 0 28px;
  padding: 18px 20px 20px;
  background: #f6e7ee;
  border: 1.5px solid var(--plum);
  border-radius: 6px;
  box-shadow: 3px 3px 0 var(--plum);
}

.scenario-kicker {
  margin: 0 0 4px;
  color: var(--plum);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-weight: 700;
}

.scenario-card h4 {
  margin: 0 0 8px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.scenario-details {
  margin: 0 0 14px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* lesson tutor chat panel */

.lesson-chat {
  margin-top: 32px;
  padding: 18px 18px 16px;
  background: var(--card);
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  box-shadow: 3px 3px 0 var(--ink);
}

.lesson-chat h4 {
  margin: 0 0 12px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 17px;
  color: var(--ink);
}

.lesson-chat-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-height: 320px;
  overflow-y: auto;
  padding: 4px 4px 12px;
  margin-bottom: 12px;
  border-bottom: 1px dashed var(--rule);
}

.lesson-chat-empty {
  font-style: italic;
  font-size: 13.5px;
  text-align: center;
  padding: 12px 8px;
  margin: 0;
}

.lesson-chat-msg {
  display: grid;
  gap: 4px;
  padding: 9px 12px;
  border-radius: 8px;
  background: var(--card-2);
  border: 1px solid var(--rule);
}

.lesson-chat-msg.user {
  background: #f3e0c4;
  border-color: var(--ink-soft);
}

.lesson-chat-msg.tutor {
  background: #f0eddb;
}

.lesson-chat-label {
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-weight: 700;
  color: var(--muted);
}

.lesson-chat-body {
  font-size: 14px;
  line-height: 1.55;
  white-space: pre-wrap;
}

.lesson-chat-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  align-items: end;
}

.lesson-chat-form textarea {
  min-height: 42px;
  max-height: 140px;
  background: var(--card-2);
}

/* --- edit mode --- */

.lesson-edit { padding: 18px 28px 28px; max-width: 900px; }

.edit-block {
  margin-bottom: 22px;
  padding: 16px 18px 18px;
  background: var(--card-2);
  border: 1.5px solid var(--rule);
  border-radius: 6px;
  box-shadow: 2px 2px 0 rgba(29, 24, 18, 0.06);
}

.edit-block h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.edit-block-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.edit-block-head h3 { margin: 0; }

.edit-rows { display: flex; flex-direction: column; gap: 10px; }

.edit-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
  padding: 10px;
  background: var(--card);
  border: 1px dashed var(--rule);
  border-radius: 4px;
}

.section-edit { flex-direction: column; gap: 8px; position: relative; }
.section-edit .danger-flat { position: absolute; top: 6px; right: 6px; }

.exercise-edit { flex-direction: column; gap: 8px; position: relative; }
.exercise-edit .danger-flat { position: absolute; top: 6px; right: 6px; }

.vocab-edit { flex-wrap: wrap; align-items: center; }
.vocab-edit input { flex: 1; min-width: 90px; }

.danger-flat {
  background: transparent;
  border: 1px solid var(--rule);
  box-shadow: none;
  color: var(--tomato);
  width: 28px;
  min-height: 28px;
  font-size: 18px;
  border-radius: 4px;
}

.danger-flat:hover {
  background: var(--card-2);
  border-color: var(--tomato);
  transform: none;
  box-shadow: none;
}

.small {
  min-height: 30px;
  padding: 0 12px;
  font-size: 12.5px;
  box-shadow: 2px 2px 0 var(--ink);
}

.small-note { margin: 0; font-style: italic; font-size: 13px; }

/* --- vocab bank view --- */

.vocab-meta {
  padding: 8px 28px 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.vocab-bank {
  padding: 18px 28px 28px;
  overflow-y: auto;
  max-height: calc(100vh - 160px);
}

.vocab-block { margin-bottom: 28px; }

.vocab-block h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 22px;
  color: var(--ink);
  border-bottom: 2px solid var(--marigold);
  display: inline-block;
  padding-bottom: 2px;
}

.vocab-search {
  width: 320px;
  max-width: 60vw;
  font-family: var(--sans);
  background: var(--card-2);
}

.link-btn {
  background: none;
  border: 0;
  padding: 0;
  color: var(--tomato);
  font-family: var(--sans);
  font-size: 12.5px;
  text-decoration: underline wavy var(--marigold);
  text-underline-offset: 3px;
  cursor: pointer;
  text-align: left;
}

.link-btn:hover { color: var(--ink); }

.save-status {
  display: inline-block;
  min-width: 60px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 13px;
  color: var(--moss);
  align-self: center;
}

.vocab-source-tag {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  background: var(--paper-edge);
  border: 1px solid var(--rule);
  font-family: var(--serif);
  font-style: italic;
  font-size: 11.5px;
  color: var(--muted);
}

.vocab-add-form {
  margin: 14px 28px 0;
  padding: 16px 18px 14px;
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 6px;
  box-shadow: 3px 3px 0 var(--ink);
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 10px 12px;
}

.vocab-add-form label {
  margin-top: 0;
}

.vocab-add-form .wide {
  grid-column: 1 / -1;
}

.vocab-add-form[hidden] { display: none; }

.vocab-add-actions {
  grid-column: 1 / -1;
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

/* --- responsive tweaks for new surfaces --- */

@media (max-width: 980px) {
  .lesson-study, .lesson-edit, .vocab-bank { padding-left: 18px; padding-right: 18px; }
  .lesson-toolbar { padding: 14px 18px; }
  .vocab-search { width: 100%; max-width: none; }
  .vocab-table { font-size: 12.5px; }
  .vocab-table th, .vocab-table td { padding: 8px; }
}

/* --- loading indicators --- */

.loading-badge {
  position: fixed;
  top: 66px; /* below the fixed home/globe/account cluster */
  right: 16px;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px 9px 12px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 999px;
  font-family: var(--serif);
  font-size: 13.5px;
  font-style: italic;
  box-shadow: 3px 3px 0 var(--marigold);
}

.loading-badge[hidden] { display: none; }

.loading-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--marigold);
  animation: pulse-dot 1s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.35; transform: scale(0.55); }
}

.is-loading {
  cursor: progress;
  opacity: 0.78;
  animation: pulse-btn 1.4s ease-in-out infinite;
}

@keyframes pulse-btn {
  0%, 100% { opacity: 0.78; }
  50% { opacity: 0.55; }
}

/* --- stub lesson CTA --- */

.stub-description {
  margin: 0 0 20px;
  padding: 14px 18px 16px;
  background: var(--card);
  border-left: 4px solid var(--marigold);
  border-radius: 0 6px 6px 0;
}

.stub-description h4 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--muted);
  font-weight: 700;
}

.stub-description p {
  margin: 0;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--ink);
}

.stub-cta {
  margin: 18px 0;
  padding: 22px 22px 20px;
  background: var(--card-2);
  border: 1.5px dashed var(--ink);
  border-radius: 6px;
  text-align: center;
  box-shadow: 3px 3px 0 var(--ink);
}

.stub-text {
  margin: 0 auto 14px;
  max-width: 460px;
  font-family: var(--serif);
  font-style: italic;
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.55;
}

.stub-generate { min-width: 200px; }

.list-card.stub strong { color: var(--ink-soft); }
.list-card.stub span { color: var(--tomato); font-style: italic; }

/* --- exercise answer input --- */

.exercise-form {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 10px;
}

.exercise-form textarea {
  background: var(--card);
  min-height: 44px;
  font-size: 14px;
}

.exercise-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.exercise-feedback {
  display: flex;
  align-items: baseline;
  gap: 6px;
  padding: 9px 12px;
  border-radius: 4px;
  font-size: 13.5px;
  line-height: 1.5;
}

.exercise-feedback strong {
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.exercise-feedback.ok {
  background: #e5ecc8;
  border-left: 3px solid var(--moss);
  color: #2f3d10;
}

.exercise-feedback.off {
  background: #f7dcd5;
  border-left: 3px solid var(--tomato);
  color: #5b1d12;
}

/* --- scrollbars (light, subtle) --- */

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--rule);
  border-radius: 10px;
  border: 2px solid var(--paper);
}
::-webkit-scrollbar-thumb:hover { background: var(--ink-soft); }

/* --- account / sync panel --- */

#accountPanel {
  margin: 18px 28px 0;
}

.account-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 14px;
}

.account-status {
  margin: 10px 0 0;
  font-size: 12.5px;
}

/* --- top actions (app language globe + account) --- */

.top-actions {
  position: fixed;
  top: 14px;
  right: 18px;
  z-index: 60;
  display: flex;
  gap: 10px;
  align-items: flex-start;
}

/* Keep header buttons (Delete plan, New chat, ...) clear of the fixed cluster. */
@media (min-width: 981px) {
  .workspace-header { padding-right: 182px; }
}


.top-icon-btn {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: var(--ink-soft);
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 50%;
  box-shadow: 2px 2px 0 var(--ink);
  transition: transform 0.12s ease, box-shadow 0.12s ease, color 0.12s ease;
}

.top-icon-btn:hover,
.top-icon-btn:focus-visible {
  color: var(--tomato);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--ink);
}

.top-icon-btn svg { width: 22px; height: 22px; display: block; }

.ui-lang { position: relative; }

.ui-lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  min-width: 136px;
  display: grid;
  gap: 2px;
  padding: 6px;
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 12px;
  box-shadow: 3px 3px 0 var(--ink);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.96);
  transform-origin: top right;
  transition: opacity 0.16s ease, transform 0.16s ease, visibility 0.16s;
}

/* invisible bridge so the pointer can cross the gap without collapsing the menu */
.ui-lang-menu::before {
  content: "";
  position: absolute;
  top: -10px;
  left: 0;
  right: 0;
  height: 10px;
}

.ui-lang:hover .ui-lang-menu,
.ui-lang:focus-within .ui-lang-menu {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.ui-lang-option {
  text-align: left;
  padding: 7px 10px;
  border-radius: 8px;
  font-size: 14px;
}

.ui-lang-option:hover { background: var(--paper-edge); }

.ui-lang-option.active {
  background: var(--ink);
  color: var(--card-2);
}

/* --- onboarding (empty plans view) --- */

.onboarding {
  display: grid;
  gap: 20px;
  max-width: 740px;
}

.onboarding-card {
  background: var(--card);
  border: 1.5px solid var(--ink);
  border-radius: 14px;
  box-shadow: 3px 3px 0 var(--ink);
  padding: 20px 22px;
}

.onboarding-card h3,
.onboarding-samples h3 {
  margin: 0 0 6px;
  font-family: var(--serif);
  font-size: 19px;
}

.onboarding-steps {
  margin: 10px 0 0;
  padding-left: 22px;
  display: grid;
  gap: 9px;
  line-height: 1.5;
}

.onboarding-samples .muted { margin: 0 0 12px; }

.sample-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 12px;
}

.sample-card {
  display: grid;
  gap: 6px;
  align-content: start;
  text-align: left;
  padding: 14px 16px;
  background: var(--card-2);
  border: 1.5px solid var(--ink);
  border-radius: 12px;
  box-shadow: 2px 2px 0 var(--ink);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.sample-card:hover {
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--ink);
}

/* Landing page / sample preview: no lesson bar. */
.plan-layout.no-lessons > .lesson-sidebar { display: none; }

.sample-kicker {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--tomato);
}

.sample-title {
  font-family: var(--serif);
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.3;
}

.sample-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.45;
}

/* --- auth gate (register / login) --- */

.auth-gate {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(29, 24, 18, 0.45);
  backdrop-filter: blur(2px);
}

.auth-gate[hidden] { display: none; }

.auth-card {
  width: min(430px, 100%);
  display: grid;
  gap: 14px;
  justify-items: start;
  padding: 26px 28px;
  background: var(--paper);
  border: 1.5px solid var(--ink);
  border-radius: 16px;
  box-shadow: 4px 4px 0 var(--ink);
}

.auth-mark { justify-self: center; }

.auth-card h2 {
  justify-self: center;
  margin: 0;
  font-family: var(--serif);
  font-size: 24px;
}

.auth-card > .muted {
  margin: 0;
  font-size: 13px;
  line-height: 1.5;
}

.auth-tabs {
  display: flex;
  gap: 6px;
  width: 100%;
}

.auth-tab {
  flex: 1;
  padding: 8px 10px;
  border: 1.5px solid var(--ink);
  border-radius: 10px;
  background: var(--card-2);
  font-weight: 600;
}

.auth-tab.active {
  background: var(--ink);
  color: var(--card-2);
}

#authForm {
  display: grid;
  gap: 12px;
  width: 100%;
}

#authForm .primary-btn { margin-top: 2px; }

.auth-skip {
  justify-self: center;
  color: var(--muted);
  font-size: 13px;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.auth-skip:hover { color: var(--ink); }

/* On small screens the home/globe/account cluster sits in the (padded) brand
   row and scrolls with the page instead of floating over content. Must stay
   after the .top-icon-btn base rule. */
@media (max-width: 980px) {
  .top-actions { position: absolute; }
  .top-icon-btn { width: 38px; height: 38px; }
  .brand { padding-right: 148px; }
}