:root {
  --bg: #080b0f;
  --bg2: #0f141b;
  --bg3: #161d27;
  --border: #222c39;
  --border-strong: #304056;
  --text: #e7edf5;
  --text-dim: #9aa8bc;
  --text-muted: #6d7b90;
  --ok: #1ec89b;
  --warn: #f2b64a;
  --bad: #ef6a6a;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: 'Outfit', sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 700px at 12% -20%, rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.16), transparent 60%),
    radial-gradient(900px 500px at 85% -10%, rgba(77, 159, 255, 0.1), transparent 62%),
    var(--bg);
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.22;
  background-image: radial-gradient(rgba(255, 255, 255, 0.08) 0.7px, transparent 0.7px);
  background-size: 3px 3px;
}

.al-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 14px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  background: rgba(8, 11, 15, 0.85);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-family: 'Syne', sans-serif;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.03em;
}

.logo-mark {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #081015;
  font-size: 12px;
  font-family: 'DM Mono', monospace;
  font-weight: 700;
  background: linear-gradient(150deg, var(--teal), #47bdf5);
}

.logo span {
  color: var(--teal);
}

.header-badge {
  justify-self: center;
  font-family: 'DM Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--teal);
  border: 1px solid rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.4);
  background: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.1);
  padding: 6px 12px;
  border-radius: 999px;
  text-transform: uppercase;
}

.header-actions {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 2px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.02);
}

.lang-toggle-btn {
  border: none;
  background: transparent;
  color: var(--text-dim);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-family: 'DM Mono', monospace;
  cursor: pointer;
}

.lang-toggle-btn.is-active {
  background: var(--teal);
  color: #081015;
}

.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  color: var(--text-dim);
  border: 1px solid var(--border-strong);
  border-radius: 10px;
  padding: 8px 10px;
  font-size: 12px;
  font-family: 'DM Mono', monospace;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.back-link:hover {
  color: var(--teal);
  border-color: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.55);
}

.al-main {
  position: relative;
  z-index: 1;
  max-width: 1220px;
  margin: 0 auto;
  padding: 30px 22px 56px;
}

.al-intro {
  margin-bottom: 18px;
}

.al-intro h1 {
  margin: 0 0 8px;
  font-family: 'Syne', sans-serif;
  font-size: clamp(30px, 4.4vw, 50px);
  line-height: 1.05;
  letter-spacing: -0.035em;
}

.al-intro p {
  margin: 0;
  max-width: 840px;
  color: var(--text-dim);
  line-height: 1.55;
}

.inline-actions {
  margin-top: 18px;
  display: inline-flex;
  gap: 10px;
  flex-wrap: wrap;
}

.al-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.65fr) minmax(320px, 1fr);
  gap: 18px;
}

.notice {
  display: none;
  margin-bottom: 12px;
  border-radius: 12px;
  border: 1px solid rgba(242, 182, 74, 0.4);
  background: rgba(242, 182, 74, 0.08);
  color: #ffd487;
  padding: 10px 12px;
  font-size: 13px;
}

.notice.visible {
  display: block;
}

.card {
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), rgba(255, 255, 255, 0));
  border-radius: 16px;
}

.main-card {
  padding: 18px;
}

.state-card h2,
.lesson-card-shell h2 {
  margin: 0 0 10px;
  font-family: 'Syne', sans-serif;
  letter-spacing: -0.02em;
}

.state-card p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.55;
}

.welcome-points {
  margin: 14px 0 0;
  padding-left: 16px;
  color: var(--text-dim);
  display: grid;
  gap: 8px;
}

.welcome-points li::marker {
  color: var(--teal);
}

.state-actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.btn {
  border: none;
  cursor: pointer;
  border-radius: 11px;
  padding: 10px 13px;
  font-family: 'Outfit', sans-serif;
  font-size: 14px;
  font-weight: 600;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--teal);
  color: #081015;
}

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

.btn-secondary {
  color: var(--text);
  border: 1px solid var(--border-strong);
  background: rgba(255, 255, 255, 0.02);
}

.btn-secondary:hover {
  color: var(--teal);
  border-color: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.55);
}

.selector-grid {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.selector-item {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.015);
}

.selector-item.is-disabled {
  opacity: 0.7;
}

.selector-item header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.selector-item h3 {
  margin: 0;
  font-size: 15px;
}

.selector-item header span {
  color: var(--text-dim);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.selector-item p {
  margin: 9px 0 12px;
  font-size: 12px;
  color: var(--text-dim);
  min-height: 34px;
}

.selector-meter,
.concept-mastery-track {
  width: 100%;
  height: 6px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}

.selector-meter span,
.concept-mastery-track span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), #56c2ff);
}

.lesson-topline {
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
  font-family: 'DM Mono', monospace;
}

.lesson-metrics {
  margin: 12px 0 14px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.lesson-metrics div {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.015);
  padding: 9px;
  display: grid;
  gap: 6px;
}

.lesson-metrics span {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.lesson-metrics strong {
  font-family: 'DM Mono', monospace;
  font-size: 14px;
  font-weight: 500;
}

.lesson-block {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.015);
  margin-bottom: 10px;
}

.lesson-block h4 {
  margin: 0 0 8px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.lesson-block p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.5;
}

.layer-text {
  margin-top: 8px !important;
  color: var(--teal) !important;
}

.lesson-question {
  margin-top: 14px;
  border: 1px solid rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.32);
  border-radius: 12px;
  padding: 14px;
  background: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.08);
}

.question-title {
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  font-family: 'DM Mono', monospace;
}

.lesson-question p {
  margin: 8px 0 10px;
}

.question-helper {
  font-size: 12px;
  color: var(--text-dim);
}

.answer-grid {
  margin-top: 10px;
  display: grid;
  gap: 8px;
}

.answer-option {
  width: 100%;
  text-align: left;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: rgba(8, 11, 15, 0.55);
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
  cursor: pointer;
  transition: border-color 0.2s ease, transform 0.15s ease;
}

.answer-option:hover {
  border-color: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.58);
  transform: translateY(-1px);
}

.feedback-panel {
  margin-top: 14px;
  border-radius: 12px;
  border: 1px solid;
  padding: 14px;
}

.feedback-panel h3 {
  margin: 0 0 8px;
}

.feedback-panel p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.55;
}

.feedback-panel.is-correct {
  border-color: rgba(30, 200, 155, 0.42);
  background: rgba(30, 200, 155, 0.12);
}

.feedback-panel.is-wrong {
  border-color: rgba(239, 106, 106, 0.42);
  background: rgba(239, 106, 106, 0.1);
}

.feedback-actions {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.side-card {
  padding: 16px;
  display: grid;
  gap: 14px;
  align-content: start;
}

.progress-meter {
  display: grid;
  gap: 8px;
}

.progress-track {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  overflow: hidden;
}

.progress-track span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--teal), #5cb8ff);
}

.progress-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.progress-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px;
  background: rgba(255, 255, 255, 0.015);
  display: grid;
  gap: 5px;
}

.progress-item span {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.progress-item strong {
  font-family: 'DM Mono', monospace;
  font-weight: 500;
  font-size: 13px;
}

.recommended-box {
  border: 1px solid rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.35);
  border-radius: 12px;
  padding: 12px;
  background: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.08);
  display: grid;
  gap: 8px;
}

.recommended-title {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--teal);
}

.recommended-copy {
  margin: 0;
  color: var(--text-dim);
}

.side-section h3 {
  margin: 0 0 8px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.concept-map-list {
  display: grid;
  gap: 7px;
}

.concept-node {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.015);
}

.concept-node.is-mastered {
  border-color: rgba(30, 200, 155, 0.45);
}

.concept-node.is-current {
  border-color: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.6);
}

.concept-node-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 7px;
}

.concept-name {
  font-size: 13px;
}

.concept-status {
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.mistake-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 6px;
}

.mistake-list li {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  display: grid;
  gap: 3px;
}

.mistake-list li strong {
  font-size: 12px;
}

.mistake-list li span {
  color: var(--text-dim);
  font-size: 12px;
  text-transform: capitalize;
}

.mistake-empty {
  color: var(--text-dim);
  font-size: 12px;
}

.reset-wrap {
  border-top: 1px dashed var(--border);
  padding-top: 12px;
}

@media (max-width: 1050px) {
  .al-layout {
    grid-template-columns: 1fr;
  }

  .progress-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .al-header {
    grid-template-columns: 1fr auto;
    grid-template-areas:
      'logo actions'
      'badge badge';
    gap: 10px;
  }

  .logo {
    grid-area: logo;
  }

  .header-actions {
    grid-area: actions;
  }

  .header-badge {
    grid-area: badge;
    justify-self: start;
  }

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

  .lesson-metrics {
    grid-template-columns: 1fr;
  }

  .progress-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .inline-actions {
    width: 100%;
  }

  .inline-actions .btn {
    flex: 1;
  }
}

.card-lite {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.015);
}

.coach-note {
  display: grid;
  gap: 8px;
}

.coach-note h3 {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.coach-note p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.5;
}

.answer-option:disabled {
  opacity: 0.56;
  cursor: not-allowed;
}

.answer-option:disabled:hover {
  transform: none;
  border-color: var(--border-strong);
}
.scenario-wrap {
  display: grid;
  gap: 10px;
}

.scenario-wrap h3 {
  margin: 0;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.scenario-wrap > p {
  margin: 0;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.45;
}

.scenario-panel {
  display: grid;
  gap: 10px;
}

.scenario-recommended {
  border: 1px solid rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.34);
  border-radius: 10px;
  padding: 10px;
  background: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.08);
  display: grid;
  gap: 7px;
}

.scenario-recommended p {
  margin: 0;
  color: var(--text-dim);
  line-height: 1.45;
  font-size: 12px;
}

.scenario-meta {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 6px;
}

.scenario-chip {
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 3px 7px;
  font-size: 10px;
  font-family: 'DM Mono', monospace;
  color: var(--text-dim);
}

.scenario-selector {
  display: grid;
  gap: 6px;
}

.scenario-selector-item {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 9px;
  background: rgba(255, 255, 255, 0.01);
  display: grid;
  gap: 6px;
}

.scenario-selector-item.is-locked {
  opacity: 0.68;
}

.scenario-selector-top {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  align-items: baseline;
}

.scenario-selector-top strong {
  font-size: 12px;
}

.scenario-selector-top span {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.scenario-selector-item p {
  margin: 0;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.4;
}

.scenario-live {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.02);
  display: grid;
  gap: 8px;
}

.scenario-live h4 {
  margin: 0;
  font-size: 14px;
}

.scenario-data-list {
  margin: 0;
  padding-left: 16px;
  color: var(--text-dim);
  display: grid;
  gap: 4px;
  font-size: 12px;
}

.scenario-question {
  margin: 0;
  color: var(--text);
  font-size: 13px;
  line-height: 1.45;
}

.scenario-answer-grid {
  display: grid;
  gap: 7px;
}

.scenario-answer {
  width: 100%;
  text-align: left;
  border-radius: 9px;
  border: 1px solid var(--border-strong);
  background: rgba(8, 11, 15, 0.55);
  color: var(--text);
  padding: 9px 10px;
  font-size: 13px;
  cursor: pointer;
}

.scenario-answer:hover {
  border-color: rgba(var(--teal-r), var(--teal-g), var(--teal-b), 0.58);
}

.scenario-result {
  border-radius: 10px;
  border: 1px solid;
  padding: 10px;
  display: grid;
  gap: 7px;
}

.scenario-result.is-correct {
  border-color: rgba(30, 200, 155, 0.42);
  background: rgba(30, 200, 155, 0.11);
}

.scenario-result.is-wrong {
  border-color: rgba(239, 106, 106, 0.45);
  background: rgba(239, 106, 106, 0.1);
}

.scenario-result p {
  margin: 0;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.45;
}

.scenario-result strong {
  font-size: 13px;
}

.scenario-stats {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  background: rgba(255, 255, 255, 0.01);
}

.scenario-stats div {
  display: grid;
  gap: 4px;
}

.scenario-stats span {
  font-size: 10px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.scenario-stats strong {
  font-family: 'DM Mono', monospace;
  font-size: 12px;
  font-weight: 500;
}

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