:root {
  --fa-accent: #7BCF9B;
  --fa-accent-dark: #123C2A;
  --fa-accent-soft: #E7F4EC;
  --fa-red: #dc2626;
  --fa-text: #10231A;
  --fa-text-light: rgba(16, 35, 26, 0.65);
  --fa-bg: #F7FAF8;
  --fa-border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
  background: var(--fa-bg);
  color: var(--fa-text);
}

/* ---------- Fullscreen page shell ---------- */
.fa-page {
  width: 100%;
  min-height: calc(100vh - 90px);
  font-size: 125%;
  padding: 2em 1.5em 4em;
}

.fa-page-header {
  max-width: 1375px;
  margin: 0 auto 2em;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6em;
  text-align: center;
}

.fa-back-link {
  align-self: flex-start;
  color: var(--fa-accent-dark);
  background: var(--fa-accent-soft);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.85em;
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
  padding: 0.5em 1em;
  border-radius: 25px;
  transition: background 0.15s, transform 0.15s;
}
.fa-back-link i { font-size: 0.75em; }
.fa-back-link:hover {
  background: var(--fa-accent);
  color: var(--fa-accent-dark);
  transform: translateX(-2px);
}

.fa-page-title {
  font-size: 1.75em;
  font-weight: 700;
  margin: 0;
  color: var(--fa-text);
}

.screen {
  display: none;
  max-width: 1375px;
  margin: 0 auto;
}
.screen.active {
  display: block;
  animation: fadeIn 0.25s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Reading column for detail screens */
.fa-content {
  max-width: 750px;
  margin: 0 auto;
  text-align: left;
}

/* ---------- Home grid ---------- */
.home-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.6em;
}
.topic-card {
  background: #ffffff;
  border: 1px solid var(--fa-border);
  border-radius: 14px;
  padding: 2em;
  min-height: 200px;
  text-align: left;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.9em;
  font-family: inherit;
  transition: border-color 0.15s, background 0.15s;
}
.topic-card:hover {
  border-color: var(--fa-accent);
  background: var(--fa-accent-soft);
}
.topic-card h3 {
  margin: 0;
  font-size: 1.4em;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.4em;
  color: var(--fa-text);
}
.topic-card p {
  margin: 0;
  font-size: 1.05em;
  color: var(--fa-text-light);
  flex-grow: 1;
}

.pill-btn {
  align-self: flex-start;
  background: var(--fa-accent-soft);
  color: var(--fa-accent-dark);
  font-weight: 600;
  font-size: 1em;
  padding: 0.7em 1.5em;
  border-radius: 30px;
}

/* ---------- Detail screens ---------- */
.back-btn {
  background: none;
  border: none;
  color: var(--fa-text-light);
  font-weight: 500;
  font-size: 0.9em;
  cursor: pointer;
  padding: 0 0 1.2em;
  display: block;
}
.back-btn:hover { color: var(--fa-accent-dark); }

.pill {
  display: inline-block;
  background: var(--fa-accent-soft);
  color: var(--fa-accent-dark);
  font-weight: 600;
  font-size: 0.78em;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.4em 0.9em;
  border-radius: 25px;
  margin: 2em 0 1em;
  animation: faReveal 0.35s ease both;
}
.pill:first-of-type { margin-top: 0; }

.fa-subhead {
  font-size: 1.05em;
  font-weight: 700;
  color: var(--fa-text);
  margin: 1.5em 0 0.6em;
}
.fa-subhead:first-of-type { margin-top: 0.4em; }

.fa-label {
  font-size: 0.78em;
  font-weight: 600;
  color: var(--fa-text-light);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin: 1em 0 0.5em;
}

/* ---------- Plain bullet list ---------- */
.fa-list {
  list-style: none;
  counter-reset: fa-list-item;
  margin: 0 0 1.1em;
  padding: 0;
}
.fa-list li {
  display: block;
  list-style: none;
  counter-increment: fa-list-item;
  position: relative;
  padding: 0.45em 0 0.45em 2.5em;
  margin-bottom: 0.35em;
  font-size: 0.95em;
  line-height: 1.5;
  color: var(--fa-text);
  animation: faReveal 0.4s ease both;
}
.fa-list li:last-child { margin-bottom: 0; }
.fa-list li::before {
  content: counter(fa-list-item);
  position: absolute;
  left: 0;
  top: 0.35em;
  width: 1.7em;
  height: 1.7em;
  border-radius: 50%;
  background: var(--fa-accent);
  color: #ffffff;
  font-size: 0.74em;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Numbered step sequence ---------- */
.fa-steps {
  list-style: none;
  counter-reset: fa-step;
  margin: 0 0 1.1em;
  padding: 0;
  display: grid;
  gap: 0.8em;
}
.fa-steps li {
  display: block;
  list-style: none;
  counter-increment: fa-step;
  position: relative;
  min-height: 5em;
  padding: 1em 1.15em 1em 4em;
  font-size: 0.95em;
  line-height: 1.5;
  color: var(--fa-text);
  background: #ffffff;
  border: 1px solid var(--fa-border);
  border-radius: 8px;
  box-shadow: 0 6px 16px rgba(16, 35, 26, 0.045);
  animation: faReveal 0.45s ease both;
}
.fa-steps li::before {
  content: counter(fa-step);
  position: absolute;
  left: 1em;
  top: 1em;
  width: 1.8em;
  height: 1.8em;
  border-radius: 50%;
  background: var(--fa-accent);
  color: #ffffff;
  font-size: 0.78em;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}
.fa-steps li::after {
  display: none;
}
.fa-steps li:last-child { min-height: 5em; }
.fa-steps li small {
  display: block;
  color: var(--fa-text-light);
  font-size: 0.8em;
  margin-top: 0.2em;
}

.fa-steps li:nth-child(2),
.fa-list li:nth-child(2) { animation-delay: 0.06s; }
.fa-steps li:nth-child(3),
.fa-list li:nth-child(3) { animation-delay: 0.12s; }
.fa-steps li:nth-child(4),
.fa-list li:nth-child(4) { animation-delay: 0.18s; }
.fa-steps li:nth-child(5),
.fa-list li:nth-child(5) { animation-delay: 0.24s; }

@keyframes faReveal {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- Label / value pair rows ---------- */
.fa-pair-list {
  display: flex;
  flex-direction: column;
  gap: 0.7em;
  margin-bottom: 0.4em;
}
.fa-pair {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3em 1em;
  padding-bottom: 0.7em;
  border-bottom: 1px solid var(--fa-border);
}
.fa-pair:last-child { border-bottom: none; padding-bottom: 0; }
.fa-pair-label {
  flex: 0 0 auto;
  min-width: 9em;
  font-weight: 600;
  font-size: 0.88em;
  color: var(--fa-accent-dark);
}
.fa-pair-text {
  flex: 1;
  min-width: 12em;
  font-size: 0.9em;
  color: var(--fa-text);
  line-height: 1.5;
}

/* ---------- Distance quick-reference ---------- */
.fa-distances {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.8em;
  margin-bottom: 2.5em;
  text-align: center;
}
.fa-distance-value {
  display: block;
  font-size: 1.3em;
  font-weight: 700;
  color: var(--fa-accent-dark);
}
.fa-distance-label {
  display: block;
  font-size: 0.78em;
  color: var(--fa-text-light);
  margin-top: 0.2em;
}

.notruf-numbers {
  display: grid;
  gap: 0.65em;
  margin: 0 0 1.25em;
}
.notruf-row {
  display: grid;
  grid-template-columns: 4em minmax(0, 1fr);
  align-items: baseline;
  gap: 0.8em;
  padding-bottom: 0.65em;
  border-bottom: 1px solid var(--fa-border);
}
.notruf-row:last-child {
  padding-bottom: 0;
  border-bottom: none;
}
.notruf-number {
  font-size: 1.8em;
  font-weight: 800;
  color: var(--fa-red);
}
.notruf-service {
  font-size: 0.92em;
  font-weight: 600;
  color: var(--fa-text);
}
.notruf-questions-label {
  margin-top: 2em;
}

/* ---------- Reference step images (recovery position / CPR-AED) ---------- */
.step-image {
  display: block;
  width: 90%;
  max-width: 425px;
  height: auto;
  margin: 0 auto 0.8em;
  border-radius: 10px;
  border: 1px solid var(--fa-border);
  cursor: zoom-in;
  transition: border-color 0.15s;
}
.step-image:hover { border-color: var(--fa-accent); }

/* ---------- Lightbox for enlarged step images ---------- */
.fa-lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.85);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 2em;
  cursor: zoom-out;
}
.fa-lightbox.active { display: flex; }
.fa-lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  border-radius: 17.5px;
  box-shadow: 0 25px 62.5px rgba(0, 0, 0, 0.4);
  cursor: default;
}

@media (max-width: 480px) {
  .fa-page { padding: 1.5em 1em 3em; }
  .fa-page-title { font-size: 1.6em; }
}

/* ---------- Home: Mini-Lektionen ---------- */
.lesson-section {
  margin-top: 2.5em;
  margin-bottom: 2em;
}
.lesson-section-head {
  margin-bottom: 1em;
}
.lesson-section-head h2 {
  margin: 0 0 0.2em;
  font-size: 1.15em;
  font-weight: 700;
  color: var(--fa-text);
}
.lesson-section-head p {
  margin: 0;
  font-size: 0.85em;
  color: var(--fa-text-light);
}
.lesson-topic-card {
  border-color: var(--fa-accent);
  background: var(--fa-accent-soft);
  width: min(100%, 680px);
  min-height: 220px;
}

/* ---------- Lesson flow (rendered inline inside #screen-lektion) ---------- */
#screen-lektion .fa-content {
  max-width: 980px;
}
#lessonFlow {
  min-height: 520px;
  padding: clamp(1.25em, 3vw, 2.5em);
  background: #ffffff;
  border: 1px solid var(--fa-border);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(16, 35, 26, 0.06);
}
#lessonFlow > * {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.lesson-phase-label {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.6em;
  margin-bottom: 0.6em;
  padding-bottom: 0.5em;
  border-bottom: 1px solid var(--fa-border);
}
.lesson-phase-name {
  font-weight: 700;
  font-size: 0.78em;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--fa-accent-dark);
}
.lesson-timer {
  font-weight: 600;
  font-size: 0.8em;
  color: var(--fa-text-light);
  white-space: nowrap;
}
.lesson-progress-track {
  height: 6.25px;
  border-radius: 3.75px;
  background: var(--fa-border);
  overflow: hidden;
  margin-bottom: 1.2em;
}
.lesson-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--fa-accent);
  transition: width 1s linear;
}
.lesson-heading {
  margin: 0 0 0.6em;
  font-size: 1.05em;
  color: var(--fa-text);
}
.lesson-instructions {
  font-size: 0.85em;
  color: var(--fa-text-light);
  margin: 0 0 1em;
}

/* Distraction / interference phase */
.lesson-distraction {
  text-align: center;
  padding: 2.4em 0;
}
.lesson-pulse-dot {
  width: 12.5px;
  height: 12.5px;
  margin: 0 auto 1em;
  border-radius: 50%;
  background: var(--fa-accent);
  animation: lessonPulse 1.2s ease-in-out infinite;
}
@keyframes lessonPulse {
  0%, 100% { opacity: 0.35; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.15); }
}
.lesson-distraction p {
  color: var(--fa-text-light);
  font-size: 0.9em;
}

/* Matching (visual lesson) */
.lesson-match-label {
  font-size: 0.78em;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--fa-text-light);
  margin: 1em 0 0.5em;
}
.lesson-match-label:first-of-type { margin-top: 0; }
.lesson-slots {
  display: flex;
  gap: 0.6em;
  margin-bottom: 0.7em;
  flex-wrap: wrap;
}
.lesson-slot {
  flex: 1;
  min-width: 112px;
  min-height: 68px;
  border: 2.5px dashed var(--fa-border);
  border-radius: 10px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.15em;
  padding: 0.4em;
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s, background 0.15s;
}
.lesson-slot-num {
  font-size: 0.7em;
  font-weight: 700;
  color: var(--fa-text-light);
}
.lesson-slot-fill {
  font-size: 0.82em;
  font-weight: 600;
  color: var(--fa-accent-dark);
  min-height: 1.1em;
}
.lesson-slot.correct { border-color: var(--fa-accent); background: var(--fa-accent-soft); border-style: solid; }
.lesson-slot.incorrect { border-color: var(--fa-red); border-style: solid; }
.lesson-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5em;
  margin-bottom: 0.4em;
}
.lesson-chip {
  background: var(--fa-accent-soft);
  color: var(--fa-accent-dark);
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.82em;
  padding: 0.45em 0.85em;
  border-radius: 22.5px;
  cursor: pointer;
}
.lesson-chip.selected { border-color: var(--fa-accent-dark); }
.lesson-chip.placed { opacity: 0.3; pointer-events: none; }

.lesson-check-btn {
  display: block;
  width: 100%;
  background: var(--fa-accent-dark);
  color: #ffffff;
  border: none;
  font-weight: 700;
  font-size: 0.9em;
  padding: 0.7em;
  border-radius: 12.5px;
  cursor: pointer;
  margin-top: 0.8em;
}
.lesson-feedback {
  margin-top: 0.8em;
  font-size: 0.85em;
  font-weight: 600;
  text-align: center;
  min-height: 1.2em;
}
.lesson-feedback.success { color: var(--fa-accent-dark); }
.lesson-feedback.error { color: var(--fa-red); }
.lesson-feedback.warn { color: #b45309; }

/* Audio lesson */
.lesson-audio {
  text-align: center;
  padding: 1.4em 0;
}
.lesson-audio-play {
  background: var(--fa-accent);
  color: #ffffff;
  border: none;
  font-weight: 700;
  font-size: 0.95em;
  padding: 0.8em 1.6em;
  border-radius: 30px;
  cursor: pointer;
}
.lesson-audio-play:hover { background: var(--fa-accent-dark); }
.lesson-audio-hint {
  margin-top: 0.8em;
  font-size: 0.85em;
  color: var(--fa-text-light);
}
.lesson-question {
  font-size: 0.95em;
  font-weight: 600;
  margin-bottom: 1em;
}
.lesson-options, .lesson-chat-options {
  display: flex;
  flex-direction: column;
  gap: 0.6em;
}
.lesson-option-btn, .lesson-chat-option {
  text-align: left;
  background: #ffffff;
  border: 1px solid var(--fa-border);
  border-radius: 12.5px;
  padding: 0.7em 0.9em;
  font-size: 0.88em;
  cursor: pointer;
  color: var(--fa-text);
  transition: border-color 0.15s, background 0.15s;
}
.lesson-option-btn:hover, .lesson-chat-option:hover { border-color: var(--fa-accent); }
.lesson-option-btn.correct, .lesson-chat-option.correct { border-color: var(--fa-accent); background: var(--fa-accent-soft); }
.lesson-option-btn.incorrect, .lesson-chat-option.incorrect { border-color: var(--fa-red); background: #fef2f2; }
.lesson-chat-option.partial { border-color: #f59e0b; background: #fffbeb; }
.lesson-option-btn.disabled, .lesson-chat-option.disabled { opacity: 0.6; pointer-events: none; }
.lesson-result { font-size: 0.95em; text-align: center; margin: 1em 0; }

/* Chat lesson */
.lesson-chat-bubble {
  background: var(--fa-accent-soft);
  border-radius: 17.5px 17.5px 17.5px 2.5px;
  padding: 0.9em 1.1em;
  font-size: 0.88em;
  line-height: 1.5;
  margin-bottom: 1em;
  color: var(--fa-text);
}

/* Motor lesson */
.lesson-motor-stats {
  font-size: 0.8em;
  color: var(--fa-text-light);
  margin-bottom: 0.8em;
}
.lesson-motor-list {
  display: flex;
  flex-direction: column;
  gap: 0.5em;
  margin-bottom: 0.6em;
}
.lesson-motor-item {
  display: flex;
  align-items: center;
  gap: 0.7em;
  background: #ffffff;
  border: 1px solid var(--fa-border);
  border-radius: 12.5px;
  padding: 0.6em 0.8em;
  font-size: 0.85em;
  text-align: left;
  cursor: pointer;
  width: 100%;
}
.lesson-motor-item.selected { border-color: var(--fa-accent-dark); background: var(--fa-accent-soft); }
.lesson-motor-num {
  flex: 0 0 auto;
  width: 1.6em;
  height: 1.6em;
  border-radius: 50%;
  background: var(--fa-accent);
  color: #ffffff;
  font-weight: 700;
  font-size: 0.78em;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lesson-motor-text { flex: 1; }

/* Evaluation screen */
.lesson-eval-row {
  display: flex;
  align-items: center;
  gap: 0.7em;
  margin-bottom: 0.9em;
}
.lesson-eval-label {
  flex: 0 0 auto;
  min-width: 7.5em;
  font-size: 0.85em;
  font-weight: 600;
  color: var(--fa-text);
}
.lesson-eval-row .lesson-progress-track {
  flex: 1;
  margin-bottom: 0;
}
.lesson-eval-value {
  flex: 0 0 auto;
  width: 3em;
  text-align: right;
  font-size: 0.85em;
  font-weight: 700;
  color: var(--fa-accent-dark);
}

.lesson-niveau {
  display: flex;
  align-items: center;
  gap: 1em;
  background: var(--fa-accent-soft);
  border: 1px solid var(--fa-accent);
  border-radius: 14px;
  padding: 1em 1.2em;
  margin: 1em 0 1.4em;
}
.lesson-niveau-badge {
  flex: 0 0 auto;
  width: 3em;
  height: 3em;
  border-radius: 50%;
  background: var(--fa-accent-dark);
  color: #ffffff;
  font-weight: 700;
  font-size: 1em;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lesson-niveau-title {
  font-weight: 700;
  font-size: 0.95em;
  color: var(--fa-text);
}
.lesson-niveau-desc {
  font-size: 0.82em;
  color: var(--fa-text-light);
}

@media (max-width: 720px) {
  .home-grid {
    grid-template-columns: 1fr;
  }
  .topic-card {
    min-height: 0;
    padding: 1.35em;
  }
  #lessonFlow {
    min-height: 420px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}