/* ==========================================================================
   Immersive Language Learning Platform - Glassmorphism Design System
   ========================================================================== */

:root {
  --bg-primary: #0a1128;
  --bg-secondary: #101f42;
  --glass-panel: rgba(16, 31, 66, 0.7);
  --glass-card: rgba(255, 255, 255, 0.05);
  --glass-border: rgba(255, 255, 255, 0.12);
  --text-main: #f0f4f9;
  --text-muted: #94a3b8;
  --accent-cyan: #00f2fe;
  --accent-blue: #4facfe;
  --accent-purple: #7f53ac;
  --accent-gold: #ffd166;
  --accent-green: #00e676;
  --accent-red: #ff5252;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-glow: 0 8px 32px 0 rgba(0, 242, 254, 0.15);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

[data-theme="light"] {
  --bg-primary: #f4f7fc;
  --bg-secondary: #ffffff;
  --glass-panel: rgba(255, 255, 255, 0.85);
  --glass-card: rgba(240, 244, 248, 0.9);
  --glass-border: rgba(0, 0, 0, 0.08);
  --text-main: #0f172a;
  --text-muted: #64748b;
  --accent-cyan: #0284c7;
  --accent-blue: #2563eb;
  --accent-purple: #7c3aed;
  --accent-gold: #d97706;
  --accent-green: #16a34a;
  --accent-red: #dc2626;
  --shadow-glow: 0 8px 32px 0 rgba(2, 132, 199, 0.1);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--bg-primary);
  background-image: radial-gradient(circle at 15% 15%, rgba(0, 242, 254, 0.08) 0%, transparent 40%),
                    radial-gradient(circle at 85% 85%, rgba(127, 83, 172, 0.1) 0%, transparent 45%);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  line-height: 1.6;
}

/* Glassmorphism Containers */
.glass-box {
  background: var(--glass-panel);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.2);
}

.glass-card {
  background: var(--glass-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.glass-card:hover {
  transform: translateY(-3px);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-glow);
}

.brand-logo:focus-visible,
button:focus-visible,
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--accent-gold);
  outline-offset: 2px;
}

.conversation-layout {
  display: grid;
  grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
  gap: 20px;
}

.conversation-picker {
  align-self: start;
  padding: 16px;
}

.conversation-picker > summary {
  margin-bottom: 12px;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
}

.conversation-picker-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.conversation-picker-options .btn {
  justify-content: flex-start;
  min-width: 0;
  min-height: 44px;
  padding: 10px 14px;
  text-align: left;
  overflow-wrap: anywhere;
}

.conversation-detail-area {
  min-width: 0;
  padding: 24px;
}

.conversation-detail-area .chat-bubble {
  min-width: 0;
  max-width: min(82%, 42rem);
  overflow-wrap: anywhere;
}

/* Navigation Header */
header.app-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--glass-panel);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--glass-border);
  padding: 12px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  cursor: pointer;
  border: 0;
}

nav.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow-x: auto;
}

.nav-link {
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-muted);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.2s ease;
}

.nav-link:hover, .nav-link.active {
  color: #fff;
  background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
}

.header-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: 24px;
  font-size: 0.9rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
  color: #000;
}

.btn-primary:hover {
  filter: brightness(1.15);
  box-shadow: var(--shadow-glow);
}

.btn-secondary {
  background: var(--glass-card);
  color: var(--text-main);
  border: 1px solid var(--glass-border);
}

.btn-secondary:hover {
  border-color: var(--accent-cyan);
}

.btn-gold {
  background: linear-gradient(135deg, #f6d365, #fda085);
  color: #000;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: 50%;
}

/* Main Container */
main.main-content {
  flex: 1;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 16px;
}

/* Section Header */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Dashboard Summary Grid */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}

.summary-card {
  padding: 20px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.summary-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  background: rgba(255, 255, 255, 0.08);
}

.summary-info h4 {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
}

.summary-info .value {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-main);
}

/* Progress Bar */
.progress-track {
  width: 100%;
  height: 8px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  overflow: hidden;
  margin-top: 6px;
}

.progress-fill {
  height: 100%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-green));
  transition: width 0.4s ease;
}

/* Continue Card & Daily Tasks Grid */
.dashboard-middle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

@media (max-width: 768px) {
  .dashboard-middle {
    grid-template-columns: 1fr;
  }
}

.task-item {
  padding: 12px 16px;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

/* Quick Action Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: 16px;
  margin-bottom: 32px;
}

.feature-card {
  padding: 20px;
  text-align: center;
  cursor: pointer;
}

.feature-card .icon {
  font-size: 2.2rem;
  margin-bottom: 10px;
}

/* Vocabulary Flashcards 3D Flip */
.flashcard-container {
  perspective: 1000px;
  width: 100%;
  max-width: 460px;
  height: 280px;
  margin: 0 auto 24px auto;
  cursor: pointer;
}

.flashcard-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.flashcard-container.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-front, .flashcard-back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
  text-align: center;
  border-radius: var(--radius-lg);
}

.flashcard-back {
  transform: rotateY(180deg);
  background: var(--bg-secondary);
}

/* Situational Dialogue Chat Bubble */
.chat-bubble {
  max-width: 80%;
  padding: 14px 18px;
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  position: relative;
  line-height: 1.5;
}

.chat-bubble.role-A {
  background: rgba(0, 242, 254, 0.12);
  border: 1px solid rgba(0, 242, 254, 0.25);
  align-self: flex-start;
}

.chat-bubble.role-B {
  background: rgba(127, 83, 172, 0.15);
  border: 1px solid rgba(127, 83, 172, 0.3);
  align-self: flex-end;
  margin-left: auto;
}

/* Mastery Badges */
.badge {
  padding: 3px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  display: inline-block;
}

.badge-stranger { background: rgba(255, 82, 82, 0.2); color: #ff5252; }
.badge-learning { background: rgba(255, 209, 102, 0.2); color: #ffd166; }
.badge-unmastered { background: rgba(79, 172, 254, 0.2); color: #4facfe; }
.badge-familiar { background: rgba(0, 242, 254, 0.2); color: #00f2fe; }
.badge-mastered { background: rgba(0, 230, 118, 0.2); color: #00e676; }

.badge-category {
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.22);
  font-weight: 600;
}

.vocabulary-controls {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.five-word-session-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 24px;
  margin-bottom: 20px;
}

.five-word-session-header h1,
.five-word-completion h2 {
  margin: 4px 0 6px;
}

.five-word-session-header p,
.five-word-completion p,
.five-word-pending p {
  margin: 0;
  color: var(--text-muted);
}

.five-word-session-actions,
.five-word-completion-actions,
.five-word-evaluation-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.five-word-session-actions > strong {
  color: var(--accent-gold);
  font-size: 1.15rem;
  white-space: nowrap;
}

.vocabulary-session-progress {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  margin: 0 auto 14px;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.vocabulary-session-progress progress {
  width: min(100%, 460px);
  height: 8px;
  accent-color: var(--accent-green);
}

.five-word-evaluation-actions,
.five-word-pending {
  margin: 20px auto 0;
}

.five-word-pending {
  display: grid;
  justify-items: center;
  gap: 12px;
  max-width: 620px;
  padding: 16px;
  border: 1px solid rgba(255, 209, 102, 0.35);
  border-radius: var(--radius-md);
  background: rgba(255, 209, 102, 0.08);
  text-align: center;
}

.five-word-completion {
  max-width: 680px;
  margin: 28px auto;
  padding: clamp(24px, 5vw, 44px);
  text-align: center;
}

.five-word-completion-icon {
  display: grid;
  width: 60px;
  height: 60px;
  margin: 0 auto 12px;
  place-items: center;
  border-radius: 50%;
  color: var(--bg-primary);
  background: var(--accent-green);
  font-size: 2rem;
  font-weight: 800;
}

.five-word-completion-actions {
  margin-top: 20px;
}

@media (max-width: 600px) {
  .five-word-session-header {
    align-items: stretch;
    flex-direction: column;
    padding: 18px;
  }

  .five-word-session-actions {
    justify-content: space-between;
  }

  .five-word-evaluation-actions > .btn,
  .five-word-completion-actions > .btn {
    flex: 1 1 100%;
  }
}

.vocabulary-filter-row {
  display: flex;
  align-items: flex-end;
  flex-wrap: wrap;
  gap: 10px;
}

.vocabulary-filter-row label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 150px;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.vocabulary-filter-row select,
.vocabulary-filter-row input {
  min-height: 40px;
  padding: 8px 10px;
  color: var(--text-main);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
}

.vocabulary-filter-row .vocabulary-search-field {
  flex: 1 1 230px;
}

.vocab-category-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 5px;
  margin-top: 8px;
}

/* Speech Wave visualizer */
.speech-wave {
  display: flex;
  align-items: center;
  gap: 4px;
  height: 24px;
}

.speech-bar {
  width: 4px;
  height: 100%;
  background: var(--accent-cyan);
  border-radius: 2px;
  animation: wave 1s ease-in-out infinite alternate;
}

@keyframes wave {
  0% { height: 20%; }
  100% { height: 100%; }
}

/* Toast Message */
.toast-notice {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  padding: 12px 24px;
  border-radius: 30px;
  background: var(--bg-secondary);
  border: 1px solid var(--accent-cyan);
  box-shadow: var(--shadow-glow);
  color: var(--text-main);
  animation: fadeIn 0.3s ease;
}

.mobile-bottom-nav {
  display: none;
}

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

/* ==========================================================================
   Background Listening Mode
   ========================================================================== */
.background-listening-hero {
  padding: 28px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.15), rgba(127, 83, 172, 0.2));
}

.background-listening-hero h1 {
  margin: 10px 0 4px;
  font-size: clamp(1.6rem, 4vw, 2.3rem);
}

.background-listening-hero p,
.background-listening-note p,
.background-player-note {
  color: var(--text-muted);
  font-size: 0.9rem;
}

.background-listening-hero-icon {
  width: 86px;
  height: 86px;
  flex: 0 0 86px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 3.4rem;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.5);
  box-shadow: 0 0 36px rgba(0, 242, 254, 0.28);
}

.background-resume-card,
.dashboard-listening-card,
.background-analytics-card {
  padding: 20px 24px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.background-resume-card p,
.dashboard-listening-card p,
.background-analytics-card p {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 4px;
}

.personalized-training-card,
.personalized-training-hero {
  padding: 22px 24px;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: linear-gradient(135deg, rgba(255, 209, 102, 0.1), rgba(0, 242, 254, 0.08));
}

.personalized-training-card h3,
.personalized-training-hero h1 {
  margin-top: 8px;
}

.personalized-training-card p,
.personalized-training-card small,
.personalized-training-hero p,
.personalized-empty {
  display: block;
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-top: 5px;
}

.personalized-training-summary {
  margin-bottom: 18px;
}

.personalized-plan-card,
.personalized-performance-card {
  padding: 20px 24px;
  margin-bottom: 18px;
}

.personalized-plan-list,
.personalized-performance-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.personalized-plan-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
}

.personalized-plan-item > div {
  min-width: 0;
  flex: 1;
}

.personalized-plan-item small {
  display: block;
  color: var(--text-muted);
  font-size: 0.78rem;
  margin-top: 2px;
}

.personalized-plan-number {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: 0 0 30px;
  border-radius: 50%;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.25);
  font-weight: 800;
}

.personalized-performance-list > div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.84rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--glass-border);
}

.personalized-performance-list strong {
  color: var(--text-main);
}

.personalized-training-question {
  max-width: 760px;
  margin: 0 auto 18px;
  padding: 28px;
  text-align: center;
}

.personalized-question-meta,
.personalized-question-label {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.personalized-question-label {
  margin: 28px 0 12px;
  font-size: 1.1rem;
  color: var(--text-main);
}

.personalized-training-question h2 {
  margin: 22px 0;
  color: var(--accent-cyan);
  font-size: clamp(1.2rem, 3vw, 1.7rem);
}

.personalized-answer-input {
  width: min(480px, 100%);
  min-height: 48px;
  padding: 10px 14px;
  color: var(--text-main);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  font-size: 1rem;
}

.personalized-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 560px;
  margin: 18px auto;
  text-align: left;
}

.personalized-options label {
  padding: 12px 14px;
  cursor: pointer;
}

.personalized-question-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.personalized-hint {
  min-height: 24px;
  margin-top: 10px;
  color: var(--accent-gold);
  font-size: 0.84rem;
}

.personalized-answer-feedback {
  margin: 18px auto;
  padding: 14px;
  border-radius: 10px;
  line-height: 1.7;
}

.personalized-answer-feedback.is-correct {
  color: var(--accent-green);
  background: rgba(0, 230, 118, 0.1);
  border: 1px solid rgba(0, 230, 118, 0.35);
}

.personalized-answer-feedback.is-wrong {
  color: var(--accent-red);
  background: rgba(255, 82, 82, 0.1);
  border: 1px solid rgba(255, 82, 82, 0.35);
}

.personalized-answer-feedback small {
  color: var(--text-muted);
}

.background-resume-actions,
.background-form-footer,
.background-player-actions,
.background-player-footer-actions,
.background-mini-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.background-listening-setup {
  padding: 24px;
  margin-bottom: 18px;
}

.background-form-grid,
.background-controls-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-bottom: 20px;
}

.background-form-grid label,
.background-controls-grid label,
.background-listening-columns label,
.background-resume-select {
  display: flex;
  flex-direction: column;
  gap: 6px;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 600;
}

.background-form-grid input,
.background-form-grid select,
.background-controls-grid input,
.background-controls-grid select,
.background-listening-columns input,
.background-listening-columns select,
.background-resume-select select {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  color: var(--text-main);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
}

.background-form-wide {
  grid-column: span 2;
}

.background-listening-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}

.background-listening-columns h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.background-mode-grid select {
  max-width: 360px;
}

.background-help,
.background-queue-summary span,
.background-queue-summary em {
  display: block;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 8px;
}

.background-inline-fields {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-top: 10px;
}

.background-options-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-bottom: 20px;
  padding: 14px;
  background: var(--glass-card);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
}

.background-options-grid label {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 4px 2px;
  color: var(--text-main);
  font-size: 0.85rem;
}

.background-options-grid input {
  accent-color: var(--accent-cyan);
  margin-right: 5px;
}

.background-form-footer {
  padding-top: 18px;
  border-top: 1px solid var(--glass-border);
}

.background-quick-start {
  margin: 2px 0 18px;
}

.offline-audio-cache {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 0 0 18px;
  padding: 16px 18px;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--bg-secondary) 72%, transparent);
}

.offline-audio-cache h3 {
  margin: 5px 0;
  color: var(--text-main);
}

.offline-audio-cache p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.5;
}

.offline-audio-actions {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.offline-audio-actions button {
  min-height: 44px;
}

.offline-audio-actions button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.background-advanced-options {
  margin: 0 0 18px;
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  background: color-mix(in srgb, var(--bg-secondary) 72%, transparent);
}

.background-advanced-options > summary {
  min-height: 48px;
  padding: 12px 16px;
  color: var(--text-main);
  font-weight: 700;
  cursor: pointer;
}

.background-advanced-options > summary span {
  margin-left: 8px;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 400;
}

.background-advanced-options[open] {
  padding: 0 16px 16px;
}

.background-queue-summary {
  flex: 1 1 280px;
  min-height: 44px;
  padding: 8px 12px;
  background: rgba(0, 242, 254, 0.06);
  border-radius: 8px;
}

.background-queue-summary strong {
  color: var(--accent-cyan);
}

.background-start-button {
  min-height: 46px;
}

.background-listening-note {
  padding: 18px 20px;
}

.background-listening-note strong {
  color: var(--accent-gold);
}

.background-analytics-stats {
  display: flex;
  gap: 26px;
  text-align: center;
}

.background-analytics-stats div {
  display: flex;
  flex-direction: column;
}

.background-analytics-stats strong {
  color: var(--accent-cyan);
  font-size: 1.5rem;
}

.background-analytics-stats span {
  color: var(--text-muted);
  font-size: 0.76rem;
}

.background-mini-player {
  position: fixed;
  left: 16px;
  right: 16px;
  bottom: 16px;
  z-index: 950;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 14px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(130%);
  transition: opacity 0.25s ease, transform 0.25s ease;
  background: color-mix(in srgb, var(--bg-secondary) 92%, transparent);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--accent-cyan);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.38), 0 0 22px rgba(0, 242, 254, 0.15);
}

.background-mini-player.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.background-mini-player.is-hidden {
  opacity: 0;
  pointer-events: none;
  transform: translateY(130%);
}

.background-mini-reopen {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: 949;
  display: none;
  align-items: center;
  gap: 6px;
  padding: 9px 14px;
  color: var(--text-primary);
  background: color-mix(in srgb, var(--bg-secondary) 94%, transparent);
  border: 1px solid var(--accent-cyan);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3), 0 0 18px rgba(0, 242, 254, 0.12);
  cursor: pointer;
}

.background-mini-reopen.is-visible {
  display: inline-flex;
}

.background-mini-main {
  min-width: 0;
  flex: 1;
}

.background-mini-status,
.background-mini-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.background-mini-status {
  color: var(--accent-cyan);
  font-size: 0.73rem;
  font-weight: 700;
}

.background-mini-title {
  margin-top: 1px;
  font-size: 0.92rem;
  font-weight: 700;
}

.background-mini-progress,
.background-player-progress {
  height: 4px;
  overflow: hidden;
  margin-top: 6px;
  background: rgba(255,255,255,0.12);
  border-radius: 4px;
}

.background-mini-progress span,
.background-player-progress span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  transition: width 0.25s ease;
}

.background-mini-actions {
  flex: 0 0 auto;
}

.background-mini-actions .btn-icon {
  width: 32px;
  height: 32px;
}

.background-player-modal {
  z-index: 1100;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(5, 10, 20, 0.88);
  backdrop-filter: blur(12px);
}

.background-player-modal.is-open {
  display: flex;
}

.background-player-dialog {
  width: min(680px, 100%);
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  padding: 24px;
  border: 1px solid var(--accent-cyan);
}

.background-player-header {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--glass-border);
}

.background-player-header h2 {
  margin-top: 8px;
  font-size: 1.2rem;
}

.background-player-content {
  padding-top: 22px;
  text-align: center;
}

.background-player-index,
.background-player-meta,
.background-player-speaker {
  color: var(--text-muted);
  font-size: 0.84rem;
}

.background-player-content h1 {
  margin: 16px 0 6px;
  color: var(--accent-cyan);
  font-size: clamp(1.7rem, 5vw, 2.5rem);
}

.background-player-translation {
  color: var(--accent-green);
  font-size: 1.1rem;
}

.background-player-example {
  margin: 20px auto 3px;
  max-width: 560px;
  font-size: 1rem;
}

.background-player-example-translation {
  color: var(--text-muted);
  font-size: 0.88rem;
}

.background-player-progress {
  height: 8px;
  margin: 24px 0;
}

.background-player-actions {
  justify-content: center;
}

.background-player-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin: 20px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

.background-player-controls label {
  display: flex;
  align-items: center;
  gap: 6px;
}

.background-player-controls select {
  padding: 6px 8px;
  color: var(--text-main);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 6px;
}

.background-player-warning {
  margin: 14px 0;
  padding: 10px;
  color: var(--accent-gold);
  background: rgba(255, 209, 102, 0.1);
  border: 1px solid rgba(255, 209, 102, 0.35);
  border-radius: 8px;
}

.background-player-footer-actions {
  justify-content: center;
  padding-top: 16px;
  border-top: 1px solid var(--glass-border);
}

.background-player-note {
  margin-top: 18px;
  line-height: 1.5;
}

body.sleep-listening-mode .main-content,
body.sleep-listening-mode .app-header {
  filter: brightness(0.72);
}

@media (max-width: 820px) {
  .background-form-grid,
  .background-controls-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .background-listening-columns {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .background-listening-hero,
  .background-resume-card,
  .dashboard-listening-card,
  .background-analytics-card,
  .personalized-training-card,
  .personalized-training-hero {
    align-items: flex-start;
    flex-direction: column;
  }

  .background-listening-hero-icon {
    display: none;
  }

  .offline-audio-cache {
    align-items: stretch;
    flex-direction: column;
  }

  .offline-audio-actions {
    justify-content: stretch;
  }

  .offline-audio-actions button {
    flex: 1 1 180px;
  }

  .background-form-grid,
  .background-controls-grid,
  .background-inline-fields {
    grid-template-columns: 1fr;
  }

  .background-form-wide {
    grid-column: auto;
  }

  .background-listening-setup {
    padding: 16px;
  }

  .background-mini-player {
    left: 8px;
    right: 8px;
    bottom: 66px;
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 8px;
  }

  .background-mini-actions {
    display: grid;
    grid-template-columns: repeat(5, minmax(44px, 1fr));
    gap: 6px;
  }

  .background-mini-expand {
    grid-column: span 4;
    min-width: 0;
    padding: 8px 10px;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .background-mini-reopen {
    right: 8px;
    bottom: 66px;
  }

  .background-mini-actions .btn-icon {
    width: 44px;
    height: 44px;
  }

  .background-player-dialog {
    padding: 16px;
  }

  .background-analytics-stats {
    width: 100%;
    justify-content: space-between;
  }

  body {
    padding-bottom: 58px;
  }

}

@media (max-width: 700px) {
  body {
    padding-bottom: calc(62px + env(safe-area-inset-bottom));
  }

  .mobile-bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 900;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    min-height: 62px;
    padding: 5px 4px calc(5px + env(safe-area-inset-bottom));
    background: color-mix(in srgb, var(--bg-secondary) 94%, transparent);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-top: 1px solid var(--glass-border);
  }

  .mobile-bottom-nav button {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1px;
    color: var(--text-muted);
    background: transparent;
    border: 0;
    font-size: 1.05rem;
    min-width: 44px;
    min-height: 44px;
    border-radius: 10px;
    cursor: pointer;
  }

  .mobile-bottom-nav button.active,
  .mobile-bottom-nav button[aria-current="page"] {
    color: var(--accent-cyan);
    background: rgba(0, 242, 254, 0.12);
  }

  .mobile-more-menu {
    position: fixed;
    right: 8px;
    bottom: calc(70px + env(safe-area-inset-bottom));
    z-index: 901;
    display: grid;
    width: min(260px, calc(100vw - 16px));
    gap: 4px;
    padding: 8px;
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-glow);
  }

  .mobile-more-menu[hidden] {
    display: none;
  }

  .mobile-more-menu button {
    min-height: 44px;
    padding: 9px 12px;
    border: 0;
    border-radius: 9px;
    background: transparent;
    color: var(--text-main);
    text-align: left;
    cursor: pointer;
  }

  .mobile-more-menu button:hover,
  .mobile-more-menu button[aria-current="page"] {
    background: var(--glass-card);
    color: var(--accent-cyan);
  }

  .conversation-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 12px;
  }

  .conversation-picker {
    padding: 12px;
  }

  .conversation-picker > summary {
    min-height: 44px;
    padding: 9px 10px;
    color: var(--text-main);
    font-weight: 700;
    cursor: pointer;
  }

  .conversation-picker-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 8px;
    max-height: 36vh;
    overflow-y: auto;
    padding: 4px;
  }

  .conversation-picker-options .btn {
    min-height: 44px;
    justify-content: flex-start;
    text-align: left;
    overflow-wrap: anywhere;
  }

  .conversation-detail-area {
    min-width: 0;
    padding: clamp(12px, 4vw, 20px);
  }

  .conversation-detail-area .chat-bubble {
    max-width: min(100%, 34rem);
  }

  .conversation-detail-area .chat-bubble > div[style*="display:flex"] {
    flex-wrap: wrap;
  }

  .conversation-detail-area .chat-bubble > div[style*="display:flex"] {
    gap: 8px;
  }

  .conversation-detail-area .chat-bubble button {
    min-height: 44px;
    max-width: 100%;
    white-space: normal;
  }

  .conversation-detail-area h2,
  .conversation-detail-area p,
  .conversation-detail-area .chat-bubble > div {
    overflow-wrap: anywhere;
  }
}

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

/* ==========================================================================
   Learner-first dashboard and quiz journey
   ========================================================================== */
.btn-large {
  min-height: 48px;
  padding-inline: 24px;
  font-size: 0.95rem;
}

.eyebrow,
.learning-kicker {
  display: block;
  color: var(--accent-cyan);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.first-run-setup {
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(0, 1.8fr);
  align-items: end;
  gap: 20px 32px;
  margin-bottom: 24px;
  padding: 26px 30px;
  border-color: rgba(0, 242, 254, 0.3);
  background: linear-gradient(125deg, rgba(20, 48, 68, 0.96), rgba(31, 42, 79, 0.94));
}

.first-run-setup-copy h2 {
  margin: 8px 0;
  font-size: clamp(1.2rem, 2vw, 1.55rem);
}

.first-run-setup-copy p {
  margin: 0;
  color: var(--text-muted);
  line-height: 1.65;
}

.first-run-setup-fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.first-run-setup-fields label {
  display: grid;
  gap: 7px;
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.first-run-setup-fields select {
  width: 100%;
  min-height: 46px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 10px;
  color: var(--text-main);
  background: rgba(8, 17, 37, 0.72);
}

.first-run-setup-fields select:focus-visible {
  outline: 3px solid var(--accent-cyan);
  outline-offset: 2px;
}

.first-run-setup-actions {
  display: flex;
  grid-column: 2;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 10px;
}

.first-run-setup-actions button {
  min-height: 44px;
}

.first-run-setup-actions button:disabled {
  cursor: wait;
  opacity: 0.65;
}

[data-theme="light"] .first-run-setup {
  background: linear-gradient(125deg, rgba(226, 249, 252, 0.98), rgba(239, 239, 255, 0.98));
}

[data-theme="light"] .first-run-setup-fields select {
  border-color: rgba(23, 43, 77, 0.2);
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.92);
}

.learning-hero {
  position: relative;
  isolation: isolate;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 40px;
  min-height: 300px;
  overflow: hidden;
  margin-bottom: 38px;
  padding: 38px 44px;
  border-color: rgba(0, 242, 254, 0.26);
  background:
    radial-gradient(circle at 82% 25%, rgba(0, 242, 254, 0.2), transparent 25%),
    linear-gradient(130deg, rgba(16, 31, 66, 0.96), rgba(34, 24, 72, 0.88));
}

.learning-hero::after {
  content: "あ · A · 한 · ă";
  position: absolute;
  right: 22px;
  bottom: -38px;
  z-index: -1;
  color: rgba(255, 255, 255, 0.035);
  font-size: clamp(4rem, 10vw, 8.5rem);
  font-weight: 900;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.learning-hero-copy h1 {
  max-width: 680px;
  margin: 10px 0 12px;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.14;
  letter-spacing: -0.035em;
}

.learning-hero-copy > p {
  max-width: 620px;
  color: var(--text-muted);
  font-size: 1rem;
}

.learning-hero-copy > p strong {
  color: var(--accent-gold);
}

.learning-hero-actions,
.learning-hero-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.learning-hero-actions {
  margin-top: 24px;
}

.learning-hero-meta {
  gap: 18px;
  margin-top: 22px;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.daily-goal-ring {
  position: relative;
  display: grid;
  width: 158px;
  height: 158px;
  place-items: center;
  flex: 0 0 158px;
  border-radius: 50%;
  background: conic-gradient(var(--accent-cyan) var(--goal-progress), rgba(255, 255, 255, 0.08) 0);
  box-shadow: 0 0 45px rgba(0, 242, 254, 0.16);
}

.daily-goal-ring::before {
  content: "";
  position: absolute;
  inset: 10px;
  border-radius: 50%;
  background: #111b37;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.daily-goal-ring > div {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.daily-goal-ring strong {
  color: var(--text-main);
  font-size: 2rem;
  line-height: 1;
}

.daily-goal-ring span {
  margin-top: 7px;
  color: var(--text-muted);
  font-size: 0.72rem;
}

.today-path-section,
.learning-library {
  margin-bottom: 38px;
}

.section-heading-row,
.dashboard-card-top {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
}

.section-heading-row {
  margin-bottom: 16px;
}

.section-heading-row h2,
.dashboard-card-top h2 {
  margin-top: 3px;
  font-size: 1.3rem;
}

.path-note {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.learning-path-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.learning-path-card {
  position: relative;
  min-height: 230px;
  overflow: hidden;
  padding: 24px;
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.025));
}

.learning-path-card.is-current {
  border-color: rgba(0, 242, 254, 0.5);
  box-shadow: 0 16px 42px rgba(0, 242, 254, 0.09);
}

.learning-path-card.is-complete {
  border-color: rgba(0, 230, 118, 0.35);
}

.path-step {
  position: absolute;
  top: 16px;
  right: 18px;
  color: rgba(255, 255, 255, 0.16);
  font-size: 2rem;
  font-weight: 900;
}

.path-icon {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 18px;
  place-items: center;
  border-radius: 14px;
  background: rgba(0, 242, 254, 0.1);
  font-size: 1.45rem;
}

.learning-path-card h3 {
  margin-bottom: 7px;
  font-size: 1.05rem;
}

.learning-path-card p {
  min-height: 50px;
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.text-action {
  margin-top: 18px;
  padding: 0;
  color: var(--accent-cyan);
  background: none;
  border: 0;
  font-weight: 750;
  cursor: pointer;
}

.dashboard-focus-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(340px, 0.85fr);
  gap: 18px;
  margin-bottom: 38px;
}

.dashboard-course-card,
.daily-missions-card {
  padding: 24px;
}

.dashboard-course-card {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
}

.dashboard-course-card .dashboard-card-top {
  grid-column: 1 / -1;
}

.course-recommendation-icon {
  display: grid;
  width: 70px;
  height: 70px;
  place-items: center;
  border-radius: 20px;
  background: linear-gradient(145deg, rgba(0, 242, 254, 0.16), rgba(127, 83, 172, 0.22));
  font-size: 2rem;
}

.course-recommendation-copy h2 {
  font-size: 1.12rem;
}

.course-recommendation-copy p,
.course-recommendation-copy small {
  display: block;
  margin-top: 5px;
  color: var(--text-muted);
  font-size: 0.8rem;
}

.mission-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}

.mission-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 10px;
  padding: 9px 11px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
}

.mission-row.is-complete {
  opacity: 0.72;
}

.mission-check {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 242, 254, 0.35);
  border-radius: 50%;
  font-weight: 800;
}

.mission-row.is-complete .mission-check {
  color: #07141f;
  background: var(--accent-green);
  border-color: var(--accent-green);
}

.mission-row strong,
.mission-row small {
  display: block;
  font-size: 0.79rem;
}

.mission-row small {
  color: var(--text-muted);
  font-size: 0.68rem;
}

.mission-claim {
  padding: 4px 9px;
  color: #231a00;
  background: var(--accent-gold);
  border: 0;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 800;
  cursor: pointer;
}

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

.feature-grid-learner .feature-card {
  display: flex;
  min-height: 150px;
  flex-direction: column;
  align-items: flex-start;
  color: var(--text-main);
  font-family: inherit;
  text-align: left;
}

.feature-grid-learner .feature-card .icon {
  margin: 0 0 auto;
}

.feature-grid-learner .feature-card strong {
  font-size: 0.95rem;
}

.feature-grid-learner .feature-card small {
  margin-top: 4px;
  color: var(--text-muted);
}

/* Quiz journey */
.quiz-stage {
  max-width: 1040px;
  margin: 0 auto;
  min-width: 0;
}

.quiz-stage-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.quiz-stage-header h1 {
  margin-top: 4px;
  font-size: clamp(1.8rem, 4vw, 2.45rem);
}

.quiz-stage-header p {
  color: var(--text-muted);
  font-size: 0.82rem;
}

.quiz-level-control {
  display: flex;
  min-width: 170px;
  flex-direction: column;
  gap: 5px;
  color: var(--text-muted);
  font-size: 0.72rem;
  font-weight: 700;
}

.quiz-level-control select,
.quiz-text-answer input {
  min-height: 44px;
  padding: 9px 12px;
  color: var(--text-main);
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  font: inherit;
}

.quiz-progress-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
}

.quiz-progress-track {
  height: 7px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 99px;
}

.quiz-progress-track span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
  border-radius: inherit;
  transition: width 0.35s ease;
}

.quiz-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  align-items: start;
  gap: 16px;
}

.quiz-question-card {
  padding: clamp(22px, 4vw, 38px);
  min-width: 0;
  overflow-wrap: anywhere;
}

.quiz-question-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.76rem;
}

.quiz-type-pill {
  padding: 5px 10px;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.1);
  border: 1px solid rgba(0, 242, 254, 0.24);
  border-radius: 999px;
  font-weight: 800;
}

.quiz-question-card > h2 {
  margin: 24px 0;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  line-height: 1.45;
}

.quiz-answer-area {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  min-width: 0;
}

.quiz-option {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 12px;
  min-height: 58px;
  padding: 10px 14px;
  background: rgba(255, 255, 255, 0.035);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease, transform 0.18s ease;
}

.quiz-option:hover {
  border-color: rgba(0, 242, 254, 0.55);
  transform: translateX(3px);
}

.quiz-option:has(input:checked) {
  background: rgba(0, 242, 254, 0.08);
  border-color: var(--accent-cyan);
}

.quiz-option.is-correct {
  background: rgba(0, 230, 118, 0.1);
  border-color: var(--accent-green);
}

.quiz-option.is-wrong {
  background: rgba(255, 82, 82, 0.1);
  border-color: var(--accent-red);
}

.quiz-option input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.quiz-option-letter {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  color: var(--accent-cyan);
  background: rgba(0, 242, 254, 0.08);
  border-radius: 9px;
  font-weight: 800;
}

.quiz-text-answer {
  display: flex;
  flex-direction: column;
  gap: 7px;
  min-width: 0;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.quiz-text-answer input {
  width: 100%;
  min-width: 0;
  min-height: 54px;
  font-size: 1rem;
}

.quiz-audio-button {
  display: flex;
  width: 100%;
  align-items: center;
  gap: 12px;
  margin: -6px 0 22px;
  padding: 14px 16px;
  color: var(--text-main);
  background: linear-gradient(135deg, rgba(0, 242, 254, 0.1), rgba(127, 83, 172, 0.12));
  border: 1px solid rgba(0, 242, 254, 0.3);
  border-radius: 12px;
  font: inherit;
  cursor: pointer;
}

.quiz-audio-button > span {
  font-size: 1.5rem;
}

.quiz-audio-button small {
  margin-left: auto;
  color: var(--text-muted);
}

.quiz-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--glass-border);
}

.quiz-card-footer > span {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.quiz-feedback:empty {
  display: none;
}

.quiz-feedback-box {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  margin-top: 18px;
  padding: 16px;
  border-radius: 13px;
}

.quiz-feedback-box.is-correct {
  background: rgba(0, 230, 118, 0.09);
  border: 1px solid rgba(0, 230, 118, 0.35);
}

.quiz-feedback-box.is-wrong {
  background: rgba(255, 209, 102, 0.08);
  border: 1px solid rgba(255, 209, 102, 0.35);
}

.quiz-feedback-icon {
  font-size: 1.65rem;
}

.quiz-feedback-box p {
  margin-top: 3px;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.quiz-side-panel {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.weekly-study-chart {
  min-width: 0;
}

.weekly-study-chart-label {
  max-width: 100%;
  overflow-wrap: anywhere;
  text-align: center;
}

.quiz-stat,
.quiz-tip {
  padding: 18px;
}

.quiz-stat span,
.quiz-tip span,
.quiz-stat small {
  display: block;
  color: var(--text-muted);
  font-size: 0.7rem;
}

.quiz-stat strong {
  display: block;
  margin: 5px 0;
  color: var(--accent-cyan);
  font-size: 1.9rem;
}

.quiz-streak strong {
  color: var(--accent-gold);
}

.quiz-tip p {
  margin-top: 8px;
  color: var(--text-main);
  font-size: 0.78rem;
}

.quiz-loading,
.quiz-empty,
.quiz-completion {
  padding: 60px 24px;
  text-align: center;
}

.quiz-loading .speech-wave {
  justify-content: center;
  margin: 0 auto 14px;
}

.quiz-loading p,
.quiz-empty p,
.quiz-completion > p {
  color: var(--text-muted);
}

.quiz-completion {
  max-width: 760px;
  margin: 30px auto;
}

.quiz-completion-burst {
  margin-bottom: 10px;
  font-size: 4rem;
}

.quiz-completion h1 {
  margin: 8px 0;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}

.quiz-result-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin: 28px 0;
}

.quiz-result-grid div {
  padding: 18px 10px;
  background: var(--glass-card);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
}

.quiz-result-grid strong,
.quiz-result-grid span {
  display: block;
}

.quiz-result-grid strong {
  color: var(--accent-cyan);
  font-size: 1.7rem;
}

.quiz-result-grid span {
  color: var(--text-muted);
  font-size: 0.72rem;
}

.quiz-completion-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 9px;
}

[data-theme="light"] .learning-hero {
  background: linear-gradient(130deg, rgba(255, 255, 255, 0.98), rgba(233, 242, 255, 0.96));
}

[data-theme="light"] .daily-goal-ring::before {
  background: #fff;
}

@media (max-width: 900px) {
  .learning-path-grid,
  .feature-grid-learner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .dashboard-focus-grid,
  .quiz-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .quiz-side-panel {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 700px) {
  header.app-header {
    min-height: 58px;
    justify-content: flex-start;
    gap: 8px;
    padding: 8px 12px;
  }

  .brand-logo {
    width: 34px;
    flex: 0 0 34px;
    overflow: hidden;
    font-size: 0;
    white-space: nowrap;
  }

  .brand-logo span {
    font-size: 1.35rem;
    -webkit-text-fill-color: initial;
  }

  nav.main-nav {
    display: none;
  }

  .lang-switcher-container {
    min-width: 0;
    flex: 1;
    justify-content: flex-end;
    margin: 0 !important;
  }

  .lang-switcher-container > span {
    display: none;
  }

  #header-target-lang {
    width: min(220px, 100%);
    max-width: 220px;
    font-size: 0.78rem;
  }

  .learning-hero {
    grid-template-columns: 1fr;
    min-height: 0;
    padding: 26px 22px;
  }

  .first-run-setup {
    grid-template-columns: 1fr;
    align-items: stretch;
    padding: 22px;
  }

  .first-run-setup-fields {
    grid-template-columns: 1fr;
  }

  .first-run-setup-actions {
    grid-column: 1;
    justify-content: stretch;
  }

  .first-run-setup-actions button {
    flex: 1 1 180px;
  }

  .daily-goal-ring {
    width: 118px;
    height: 118px;
    justify-self: start;
  }

  .daily-goal-ring strong {
    font-size: 1.55rem;
  }

  .learning-path-grid,
  .feature-grid-learner,
  .quiz-side-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .section-heading-row,
  .quiz-stage-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .path-note {
    display: none;
  }

  .dashboard-course-card {
    grid-template-columns: auto 1fr;
  }

  .dashboard-course-card > .btn {
    grid-column: 1 / -1;
  }

  .quiz-level-control {
    width: 100%;
  }

  .quiz-card-footer,
  .quiz-feedback-box {
    align-items: stretch;
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .quiz-feedback-icon {
    display: none;
  }

  .quiz-result-grid {
    grid-template-columns: 1fr;
  }
}