:root {
  --bg-main: #f8f7f4;
  --bg-card: #ffffff;
  --bg-subtle: #f1efe9;
  --bg-accent: #18181b;
  --text-main: #18181b;
  --text-secondary: #52525b;
  --text-muted: #71717a;
  --border-color: #e4e2dd;
  --border-strong: #d4d1c8;

  /* German Gender Color System */
  --der-color: #1d4ed8;
  --der-bg: #dbeafe;
  --der-border: #93c5fd;

  --die-color: #be123c;
  --die-bg: #ffe4e6;
  --die-border: #fda4af;

  --das-color: #047857;
  --das-bg: #d1fae5;
  --das-border: #6ee7b7;

  --pl-color: #b45309;
  --pl-bg: #fef3c7;
  --pl-border: #fcd34d;

  /* Brand & Action Colors */
  --primary: #d97706;
  --primary-dark: #b45309;
  --primary-light: #fffbeb;
  --indigo: #4f46e5;
  --indigo-light: #eef2ff;
  --success: #059669;
  --success-bg: #ecfdf5;
  --danger: #dc2626;
  --danger-bg: #fef2f2;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --shadow-sm: 0 1px 3px rgba(24, 24, 27, 0.06);
  --shadow-md: 0 6px 20px -4px rgba(24, 24, 27, 0.08);
  --shadow-lg: 0 14px 32px -6px rgba(24, 24, 27, 0.14);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* === TOP NAVIGATION === */
.top-header {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1220px;
  margin: 0 auto;
  padding: 0.75rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.brand-flag {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(180deg, #18181b 33%, #dc2626 33%, #dc2626 66%, #f59e0b 66%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
}

.brand-title {
  font-weight: 800;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.level-pill {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border: 1px solid #fde68a;
}

.brand-subtitle {
  font-size: 0.76rem;
  color: var(--text-muted);
}

.nav-tabs {
  display: flex;
  gap: 0.35rem;
  background: var(--bg-subtle);
  padding: 0.3rem;
  border-radius: 12px;
  overflow-x: auto;
}

.nav-tab {
  border: none;
  background: transparent;
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.88rem;
  padding: 0.5rem 0.9rem;
  border-radius: 9px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.nav-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.5);
}

.nav-tab.active {
  background: var(--bg-card);
  color: var(--text-main);
  box-shadow: var(--shadow-sm);
}

.nav-badge {
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.08rem 0.42rem;
  border-radius: 999px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.streak-chip {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.4rem 0.75rem;
  border-radius: 999px;
  background: #fff7ed;
  color: #c2410c;
  border: 1px solid #fed7aa;
}

.icon-btn {
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  width: 38px;
  height: 38px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 1rem;
  transition: all 0.15s ease;
}

.icon-btn:hover {
  background: #e4e2dd;
}

/* === MAIN CONTAINER === */
.main-container {
  max-width: 1220px;
  width: 100%;
  margin: 0 auto;
  padding: 1.75rem 1.5rem 4rem;
  flex: 1;
}

.view-section {
  display: none;
  animation: fadeIn 0.2s ease;
}

.view-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* === GENDER BADGES & COLOR SYSTEM === */
.gender-badge {
  display: inline-flex;
  align-items: center;
  font-weight: 700;
  font-size: 0.78rem;
  padding: 0.15rem 0.55rem;
  border-radius: 6px;
  letter-spacing: 0.01em;
}

.gender-der {
  background: var(--der-bg);
  color: var(--der-color);
  border: 1px solid var(--der-border);
}

.gender-die {
  background: var(--die-bg);
  color: var(--die-color);
  border: 1px solid var(--die-border);
}

.gender-das {
  background: var(--das-bg);
  color: var(--das-color);
  border: 1px solid var(--das-border);
}

.gender-pl {
  background: var(--pl-bg);
  color: var(--pl-color);
  border: 1px solid var(--pl-border);
}

.gender-none {
  background: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

/* === DASHBOARD === */
.hero-banner {
  background: linear-gradient(135deg, #18181b 0%, #27272a 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 2rem;
  margin-bottom: 1.75rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  box-shadow: var(--shadow-md);
}

.hero-text h1 {
  font-size: 1.65rem;
  font-weight: 800;
  margin-bottom: 0.45rem;
  letter-spacing: -0.02em;
}

.hero-text p {
  color: #d4d4d8;
  max-width: 640px;
  font-size: 0.96rem;
}

.gender-legend-bar {
  display: flex;
  gap: 0.55rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

.hero-cta-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.btn {
  border: none;
  font-family: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.68rem 1.2rem;
  border-radius: 10px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  transition: all 0.15s ease;
}

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

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

.btn-secondary {
  background: var(--bg-subtle);
  color: var(--text-main);
  border: 1px solid var(--border-strong);
}

.btn-secondary:hover {
  background: #e4e2dd;
}

.btn-light {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.btn-light:hover {
  background: rgba(255, 255, 255, 0.2);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.stat-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-muted);
  margin-bottom: 0.35rem;
}

.stat-value {
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-main);
  line-height: 1.2;
}

.stat-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin-top: 0.3rem;
}

.dashboard-columns {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 1.5rem;
}

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

.panel-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
  gap: 0.5rem;
}

.panel-title {
  font-size: 1.1rem;
  font-weight: 700;
}

.module-launcher-list {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.launcher-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.15rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  background: var(--bg-main);
  cursor: pointer;
  transition: all 0.15s ease;
  gap: 1rem;
}

.launcher-item:hover {
  border-color: var(--primary);
  background: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.launcher-left {
  display: flex;
  align-items: center;
  gap: 0.9rem;
}

.launcher-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.launcher-title {
  font-weight: 700;
  font-size: 0.98rem;
}

.launcher-desc {
  font-size: 0.84rem;
  color: var(--text-secondary);
}

/* === ACTIVE RECALL SRS TRAINER === */
.trainer-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.mode-pills {
  display: flex;
  gap: 0.45rem;
  flex-wrap: wrap;
}

.mode-pill {
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-secondary);
  font-weight: 600;
  font-size: 0.85rem;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.mode-pill.active {
  background: var(--bg-accent);
  color: #fff;
  border-color: var(--bg-accent);
}

.srs-card-stage {
  max-width: 760px;
  margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2.25rem;
  box-shadow: var(--shadow-md);
}

.card-meta-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.category-tag {
  font-size: 0.76rem;
  font-weight: 600;
  padding: 0.2rem 0.65rem;
  border-radius: 999px;
  background: var(--bg-subtle);
  color: var(--text-secondary);
}

.prompt-instruction {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 0.5rem;
}

.prompt-main {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 0.75rem;
}

.cloze-box {
  background: var(--bg-main);
  border-left: 4px solid var(--primary);
  padding: 1rem 1.25rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin-bottom: 1.25rem;
}

.cloze-de {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.cloze-en {
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.answer-input-row {
  display: flex;
  gap: 0.6rem;
  margin-bottom: 0.65rem;
}

.german-input {
  flex: 1;
  font-family: inherit;
  font-size: 1.08rem;
  font-weight: 500;
  padding: 0.75rem 1rem;
  border: 2px solid var(--border-strong);
  border-radius: 10px;
  outline: none;
  transition: border-color 0.15s ease;
}

.german-input:focus {
  border-color: var(--primary);
}

.umlaut-bar {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 1.25rem;
  flex-wrap: wrap;
}

.umlaut-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-right: 0.25rem;
}

.umlaut-key {
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: 6px;
  padding: 0.2rem 0.55rem;
  font-weight: 700;
  font-size: 0.85rem;
  cursor: pointer;
  user-select: none;
}

.umlaut-key:hover {
  background: #e4e2dd;
}

.gender-choice-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.gender-choice-btn {
  padding: 1rem;
  font-size: 1.1rem;
  font-weight: 800;
  border-radius: 12px;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.1s ease;
}

.gender-choice-btn:hover {
  transform: translateY(-2px);
}

.feedback-panel {
  margin-top: 1.5rem;
  padding: 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-main);
}

.feedback-panel.correct {
  background: var(--success-bg);
  border-color: #6ee7b7;
}

.feedback-panel.incorrect {
  background: var(--danger-bg);
  border-color: #fca5a5;
}

.word-reveal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  flex-wrap: wrap;
}

.word-reveal-title {
  font-size: 1.4rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.word-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
  margin: 0.85rem 0;
  font-size: 0.88rem;
}

.detail-item {
  background: rgba(255, 255, 255, 0.75);
  padding: 0.65rem 0.85rem;
  border-radius: 8px;
  border: 1px solid rgba(0, 0, 0, 0.06);
}

.detail-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--text-muted);
  display: block;
}

.srs-grade-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
  margin-top: 1.2rem;
}

.grade-btn {
  padding: 0.65rem 0.5rem;
  border-radius: 9px;
  border: 1px solid var(--border-strong);
  background: #fff;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.84rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.15rem;
  transition: all 0.15s ease;
}

.grade-btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.grade-btn span.interval {
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--text-muted);
}

.grade-again { border-color: #fca5a5; color: #b91c1c; }
.grade-hard { border-color: #fed7aa; color: #c2410c; }
.grade-good { border-color: #86efac; color: #15803d; }
.grade-easy { border-color: #93c5fd; color: #1d4ed8; }

/* === INTERACTIVE READER (LESEECKE) === */
.reader-layout {
  display: grid;
  grid-template-columns: 310px 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 940px) {
  .reader-layout {
    grid-template-columns: 1fr;
  }
}

.story-sidebar {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.story-card-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem;
  cursor: pointer;
  transition: all 0.15s ease;
}

.story-card-item:hover {
  border-color: var(--border-strong);
}

.story-card-item.active {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(217, 119, 6, 0.15);
}

.story-card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.3rem;
}

.story-card-title {
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.story-card-sub {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.reader-main {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.reader-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-bottom: 1.25rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.story-paragraph {
  margin-bottom: 1.35rem;
}

.story-de-line {
  font-size: 1.16rem;
  line-height: 1.85;
  color: var(--text-main);
}

.story-en-line {
  font-size: 0.94rem;
  color: var(--text-secondary);
  margin-top: 0.35rem;
  padding-left: 0.75rem;
  border-left: 3px solid var(--border-strong);
}

.word-token {
  cursor: pointer;
  padding: 0.08rem 0.16rem;
  border-radius: 4px;
  transition: background 0.12s ease;
}

.word-token:hover {
  background: #fef3c7;
}

.word-token.target-vocab {
  background: #fef3c7;
  border-bottom: 2px solid var(--primary);
  font-weight: 600;
}

.word-token.in-deck {
  border-bottom: 2px dotted var(--indigo);
}

.word-inspector-drawer {
  margin-top: 1.5rem;
  padding: 1.25rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
}

/* === CONVERSATION & WRITING PRACTICE (SPRACHPRAXIS) === */
.scenario-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 940px) {
  .scenario-layout {
    grid-template-columns: 1fr;
  }
}

.target-words-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  margin-bottom: 1.25rem;
}

.target-chips-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.6rem;
}

.target-word-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  font-size: 0.84rem;
  font-weight: 600;
  transition: all 0.2s ease;
}

.target-word-chip.used {
  background: var(--success-bg);
  border-color: #34d399;
  color: #065f46;
}

.chat-stream {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 1.25rem;
  max-height: 460px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.chat-bubble {
  max-width: 85%;
  padding: 1rem 1.2rem;
  border-radius: 14px;
  font-size: 0.96rem;
}

.chat-partner {
  align-self: flex-start;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-bottom-left-radius: 4px;
}

.chat-user {
  align-self: flex-end;
  background: var(--bg-accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.chat-feedback {
  align-self: stretch;
  max-width: 100%;
  background: #fffbeb;
  border: 1px solid #fde68a;
  color: #78350f;
  font-size: 0.86rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
}

/* === VOCABULARY BANK TABLE === */
.vocab-filter-bar {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.vocab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
  gap: 1rem;
}

.vocab-item-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.65rem;
}

/* === MODAL === */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(24, 24, 27, 0.55);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}

.modal-backdrop.open {
  display: flex;
}

.modal-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  max-width: 540px;
  width: 100%;
  padding: 1.75rem;
  box-shadow: var(--shadow-lg);
}

.toast-notification {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-accent);
  color: #fff;
  padding: 0.8rem 1.2rem;
  border-radius: 10px;
  font-size: 0.88rem;
  font-weight: 600;
  box-shadow: var(--shadow-lg);
  z-index: 300;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all 0.2s ease;
}

.toast-notification.show {
  opacity: 1;
  transform: translateY(0);
}

/* === HOVER-TO-TRANSLATE MODE & FLOATING TOOLTIP === */
.hover-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 0.42rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
  border: 1px solid var(--border-strong);
  background: var(--bg-subtle);
  color: var(--text-secondary);
  transition: all 0.15s ease;
  white-space: nowrap;
}

.hover-toggle-btn.active {
  background: var(--indigo-light);
  color: var(--indigo);
  border-color: #a5b4fc;
}

.hover-toggle-btn:hover {
  transform: translateY(-1px);
}

body.hover-translate-on .word-token {
  border-bottom: 1px dashed rgba(79, 70, 229, 0.35);
}

body.hover-translate-on .word-token:hover {
  background: #e0e7ff;
  color: #1e1b4b;
}

.hover-translate-tooltip {
  position: fixed;
  z-index: 9999;
  background: #18181b;
  color: #ffffff;
  padding: 0.55rem 0.85rem;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.28);
  pointer-events: none;
  opacity: 0;
  transform: translate(-50%, -100%) translateY(-8px);
  transition: opacity 0.12s ease;
  max-width: 310px;
  font-size: 0.84rem;
  line-height: 1.35;
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.hover-translate-tooltip.visible {
  opacity: 1;
}

.hover-translate-tooltip::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border-width: 6px;
  border-style: solid;
  border-color: #18181b transparent transparent transparent;
}

.hover-tt-top {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 0.18rem;
  font-weight: 700;
  color: #f4f4f5;
}

.hover-tt-en {
  color: #fde68a;
  font-weight: 700;
  font-size: 0.9rem;
}

.hover-tt-note {
  color: #a1a1aa;
  font-size: 0.74rem;
  margin-top: 0.15rem;
}

/* === WORTBAUKASTEN (COMPOUND & PREFIX LAB) === */
.compound-blocks-row {
  display: flex;
  align-items: stretch;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin: 1rem 0;
}

.compound-block {
  background: var(--bg-main);
  border: 2px solid var(--border-strong);
  border-radius: 12px;
  padding: 0.75rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 130px;
}

.compound-block.head-word {
  border-color: var(--primary);
  background: #fffbeb;
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.12);
}

.compound-plus {
  display: flex;
  align-items: center;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-muted);
}

.prefix-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.prefix-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.sep-pill {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
}

.sep-yes {
  background: #ecfdf5;
  color: #047857;
  border: 1px solid #6ee7b7;
}

.sep-no {
  background: #eff6ff;
  color: #1d4ed8;
  border: 1px solid #93c5fd;
}

/* === HÖRTRAINING (LISTENING DICTATION & SHADOWING) === */
.audio-hero-box {
  background: linear-gradient(135deg, #1e1b4b 0%, #312e81 100%);
  color: #fff;
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.25rem;
}

.diff-word {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  border-radius: 6px;
  margin: 0.12rem;
  font-weight: 700;
}

.diff-ok {
  background: #d1fae5;
  color: #065f46;
}

.diff-miss {
  background: #fee2e2;
  color: #991b1b;
  text-decoration: underline wavy;
}

.mic-btn-recording {
  background: #dc2626 !important;
  color: #fff !important;
  animation: pulseMic 1.2s infinite;
}

@keyframes pulseMic {
  0% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0.55); }
  70% { box-shadow: 0 0 0 10px rgba(220, 38, 38, 0); }
  100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); }
}

/* === PREPOSITION & CASE TRAINER === */
.case-badge-akk {
  background: #fef3c7;
  color: #b45309;
  border: 1px solid #fcd34d;
  font-weight: 700;
  font-size: 0.76rem;
  padding: 0.15rem 0.55rem;
  border-radius: 6px;
}

.case-badge-dat {
  background: #ede9fe;
  color: #6d28d9;
  border: 1px solid #c4b5fd;
  font-weight: 700;
  font-size: 0.76rem;
  padding: 0.15rem 0.55rem;
  border-radius: 6px;
}

.prep-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.75rem;
  margin: 1.25rem 0;
}

.dawo-options-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.65rem;
  margin: 1.25rem 0;
}

/* === MOBILE & TABLET RESPONSIVE CLEANUP === */
.nav-tabs::-webkit-scrollbar,
.mode-pills::-webkit-scrollbar {
  display: none;
}

.nav-tabs,
.mode-pills {
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

@media (max-width: 940px) {
  .header-inner {
    padding: 0.6rem 0.9rem;
    gap: 0.55rem;
  }

  .brand {
    order: 1;
  }

  .header-actions {
    order: 2;
    margin-left: auto;
    gap: 0.35rem;
  }

  .nav-tabs {
    order: 3;
    width: 100%;
    padding: 0.25rem;
    gap: 0.25rem;
  }

  .nav-tab {
    padding: 0.42rem 0.7rem;
    font-size: 0.82rem;
    flex-shrink: 0;
  }

  /* Turn story and scenario lists into horizontal swipe strips on mobile/tablet so content is immediately visible */
  #story-list-container,
  #scenario-list-container {
    flex-direction: row !important;
    overflow-x: auto;
    padding-bottom: 0.35rem;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }

  #story-list-container .story-card-item,
  #scenario-list-container .story-card-item {
    min-width: 245px;
    max-width: 270px;
    flex-shrink: 0;
    scroll-snap-align: start;
    padding: 0.8rem 0.95rem;
  }
}

@media (max-width: 640px) {
  .brand-subtitle {
    display: none;
  }

  .brand-flag {
    width: 30px;
    height: 30px;
    border-radius: 8px;
  }

  .brand-title {
    font-size: 1.02rem;
  }

  .hover-toggle-btn .hover-label-text {
    display: none;
  }

  .hover-toggle-btn {
    padding: 0.36rem 0.6rem;
    font-size: 0.78rem;
  }

  .streak-chip {
    padding: 0.34rem 0.55rem;
    font-size: 0.76rem;
  }

  .streak-chip .streak-days-word {
    display: none;
  }

  .icon-btn {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    font-size: 0.9rem;
  }

  .main-container {
    padding: 0.9rem 0.75rem 4.5rem;
  }

  .hero-banner {
    padding: 1.15rem;
    margin-bottom: 1rem;
    border-radius: var(--radius-md);
    gap: 1rem;
  }

  .hero-text h1 {
    font-size: 1.22rem;
    line-height: 1.3;
  }

  .hero-text p {
    font-size: 0.86rem;
  }

  .gender-legend-bar {
    gap: 0.35rem;
    margin-top: 0.75rem;
  }

  .gender-badge {
    font-size: 0.72rem;
    padding: 0.12rem 0.45rem;
  }

  .hero-cta-group {
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .hero-cta-group .btn {
    justify-content: center;
    padding: 0.6rem 0.5rem;
    font-size: 0.82rem;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.6rem;
    margin-bottom: 1.1rem;
  }

  .stat-card {
    padding: 0.85rem 0.9rem;
  }

  .stat-label {
    font-size: 0.68rem;
  }

  .stat-value {
    font-size: 1.35rem;
  }

  .stat-sub {
    font-size: 0.72rem;
  }

  .panel-card,
  .srs-card-stage,
  .reader-main {
    padding: 1.1rem 0.95rem;
    border-radius: var(--radius-md);
  }

  .launcher-item {
    padding: 0.8rem 0.85rem;
    gap: 0.65rem;
  }

  .launcher-icon {
    width: 38px;
    height: 38px;
    font-size: 1.1rem;
  }

  .launcher-title {
    font-size: 0.9rem;
  }

  .launcher-desc {
    font-size: 0.78rem;
    line-height: 1.35;
  }

  /* Horizontal scrollable mode pills on mobile */
  .trainer-controls {
    gap: 0.65rem;
    margin-bottom: 1rem;
  }

  .mode-pills {
    flex-wrap: nowrap;
    overflow-x: auto;
    width: 100%;
    padding-bottom: 0.15rem;
  }

  .mode-pill {
    flex-shrink: 0;
    font-size: 0.8rem;
    padding: 0.45rem 0.8rem;
  }

  #trainer-category-select {
    width: 100%;
  }

  .prompt-main {
    font-size: 1.25rem;
  }

  .cloze-box {
    padding: 0.8rem 0.95rem;
  }

  .cloze-de {
    font-size: 1.02rem;
  }

  /* Stack input and buttons cleanly on mobile; 16px prevents iOS Safari auto-zoom */
  .answer-input-row {
    flex-wrap: wrap;
    gap: 0.5rem;
  }

  .german-input {
    width: 100%;
    flex: 1 1 100%;
    font-size: 16px !important;
    padding: 0.68rem 0.85rem;
  }

  .answer-input-row .btn {
    flex: 1;
    justify-content: center;
    padding: 0.65rem 0.75rem;
  }

  .umlaut-bar {
    gap: 0.3rem;
    margin-bottom: 0.9rem;
  }

  .umlaut-key {
    min-width: 36px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.92rem;
    padding: 0;
  }

  /* 2x2 thumb-friendly grids on mobile */
  .gender-choice-grid,
  .srs-grade-buttons {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  .gender-choice-btn {
    padding: 0.8rem;
    font-size: 1rem;
  }

  .prep-options-grid {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .dawo-options-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  /* Compound blocks wrap cleanly on mobile */
  .compound-blocks-row {
    flex-direction: column;
    gap: 0.35rem;
  }

  .compound-plus {
    justify-content: center;
    font-size: 1rem;
    line-height: 1;
  }

  .compound-block {
    width: 100%;
    padding: 0.6rem 0.8rem;
  }

  .story-de-line {
    font-size: 1.05rem;
    line-height: 1.75;
  }

  .chat-bubble {
    max-width: 94%;
    padding: 0.8rem 0.95rem;
    font-size: 0.9rem;
  }

  .vocab-filter-bar {
    flex-direction: column;
    gap: 0.5rem;
  }

  .vocab-filter-bar .german-input {
    max-width: 100% !important;
  }

  .vocab-grid,
  .prefix-grid {
    grid-template-columns: 1fr;
  }

  .modal-card {
    padding: 1.2rem;
    max-height: 90vh;
    overflow-y: auto;
  }

  .toast-notification {
    left: 0.75rem;
    right: 0.75rem;
    bottom: 0.75rem;
    text-align: center;
  }
}