/* ==========================================================================
   LUMINA LEARN APP STYLES
   App layouts, Quiz animations, Bottom sheets, Modals, Leaderboard & Footer
   ========================================================================== */

/* Main Container & Layout */
.app-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  position: relative;
}

/* Top App Header */
.top-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--transition-normal);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-primary);
  text-decoration: none;
  cursor: pointer;
}

.brand-badge {
  background: linear-gradient(135deg, var(--primary-yellow) 0%, var(--accent-gold) 100%);
  color: #231b00;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

.header-stats {
  display: flex;
  align-items: center;
  gap: 16px;
}

.stat-chip {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-surface-container);
  border: 1px solid var(--border-subtle);
  padding: 6px 12px;
  border-radius: var(--radius-full);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-primary);
  transition: transform var(--transition-fast);
}
.stat-chip:hover {
  transform: scale(1.04);
}

.header-controls {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-btn {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-container);
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.icon-btn:hover {
  background: var(--bg-surface-container-high);
  color: var(--text-primary);
  transform: scale(1.05);
}

/* Tab Navigation Bar */
.main-nav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  position: sticky;
  top: 65px;
  z-index: 35;
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.nav-inner::-webkit-scrollbar {
  display: none;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--text-muted);
  border: none;
  background: transparent;
  cursor: pointer;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.nav-tab:hover {
  color: var(--text-primary);
}

.nav-tab.active {
  color: var(--accent-green);
  border-bottom-color: var(--accent-green);
}

html.dark .nav-tab.active {
  color: var(--accent-green-light);
  border-bottom-color: var(--accent-green-light);
}

/* Screen Viewports */
.screen-view {
  display: none;
  width: 100%;
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 20px 80px;
  animation: fadeIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

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

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   QUIZ COMPONENT STYLES (MATCHING STITCH)
   ========================================================================== */

.quiz-container {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.quiz-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.progress-track {
  flex: 1;
  height: 12px;
  background: var(--bg-surface-container-high);
  border-radius: var(--radius-full);
  overflow: hidden;
  position: relative;
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.2);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-green) 0%, var(--accent-green-light) 100%);
  border-radius: var(--radius-full);
  transition: width 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  box-shadow: 0 0 12px rgba(94, 235, 147, 0.5);
}

.quiz-title-area {
  text-align: center;
  margin-bottom: 8px;
}

.quiz-title-area h2 {
  font-size: 1.75rem;
  margin-bottom: 4px;
}

.quiz-title-area p {
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* Target Word Card */
.word-card {
  background: linear-gradient(145deg, var(--bg-surface-container-high) 0%, var(--bg-surface-container) 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--card-shadow);
}

.audio-pronounce-btn {
  background: var(--accent-blue-bg);
  border: 1px solid var(--accent-blue-light);
  color: var(--accent-blue-light);
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-spring);
}

.audio-pronounce-btn:hover {
  transform: scale(1.12);
  background: var(--accent-blue);
  color: #fff;
  box-shadow: 0 0 20px rgba(96, 165, 250, 0.6);
}

.audio-pronounce-btn:active {
  transform: scale(0.95);
}

.word-display {
  font-size: 2.5rem;
  font-family: var(--font-headline);
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.word-phonetic {
  font-size: 0.9rem;
  color: var(--accent-blue);
  font-weight: 600;
}

/* Options Grid */
.options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 8px;
}

.option-card {
  background: var(--bg-surface-container);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 20px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  cursor: pointer;
  user-select: none;
  transition: all var(--transition-spring);
  position: relative;
  min-height: 140px;
}

.option-card:hover {
  background: var(--bg-surface-container-high);
  border-color: var(--accent-blue-light);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.option-card.selected {
  border-color: var(--accent-green);
  background: var(--accent-green-bg);
  box-shadow: 0 0 24px rgba(94, 235, 147, 0.25);
  transform: translateY(-2px);
}

.option-card.correct {
  border-color: var(--accent-green) !important;
  background: var(--accent-green-bg) !important;
}

.option-card.wrong {
  border-color: var(--accent-error) !important;
  background: var(--accent-error-bg) !important;
  animation: shake 0.4s ease-in-out;
}

.option-card.dimmed {
  opacity: 0.4;
  pointer-events: none;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-6px); }
  40%, 80% { transform: translateX(6px); }
}

.option-icon-wrapper {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  background: var(--bg-surface-container-highest);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  transition: transform var(--transition-spring);
}

.option-card:hover .option-icon-wrapper,
.option-card.selected .option-icon-wrapper {
  transform: scale(1.12);
}

.option-icon-img {
  width: 44px;
  height: 44px;
  object-fit: contain;
}

.option-icon-symbol {
  font-size: 32px;
  color: var(--text-primary);
}

.option-label {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}

/* ==========================================================================
   BOTTOM ACTION BAR & STITCH FEEDBACK SHEETS
   ========================================================================== */

.bottom-action-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 16px 20px calc(16px + env(safe-area-inset-bottom));
  box-shadow: 0 -8px 24px rgba(0,0,0,0.15);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1), background-color var(--transition-normal);
}

.bottom-bar-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Feedback Drawer (Success / Error State) */
.feedback-sheet {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 55;
  padding: 24px 20px calc(20px + env(safe-area-inset-bottom));
  transform: translateY(110%);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.2);
  border-top-left-radius: var(--radius-xl);
  border-top-right-radius: var(--radius-xl);
  box-shadow: 0 -12px 40px rgba(0, 0, 0, 0.4);
}

.feedback-sheet.visible {
  transform: translateY(0);
}

.feedback-sheet.success {
  background: var(--bg-surface-container);
  border-top: 2px solid var(--accent-green);
  box-shadow: 0 -10px 40px rgba(94, 235, 147, 0.25);
}

.feedback-sheet.error {
  background: var(--bg-surface-container);
  border-top: 2px solid var(--accent-error);
  box-shadow: 0 -10px 40px rgba(239, 68, 68, 0.25);
}

.feedback-content {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feedback-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.feedback-msg-group {
  display: flex;
  align-items: center;
  gap: 14px;
}

.feedback-badge-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.feedback-sheet.success .feedback-badge-icon {
  background: var(--accent-green-bg);
  color: var(--accent-green-light);
  box-shadow: 0 0 16px rgba(94, 235, 147, 0.4);
}

.feedback-sheet.error .feedback-badge-icon {
  background: var(--accent-error-bg);
  color: var(--accent-error);
  box-shadow: 0 0 16px rgba(239, 68, 68, 0.4);
}

.feedback-title {
  font-size: 1.25rem;
  font-weight: 800;
}

.feedback-sheet.success .feedback-title {
  color: var(--accent-green-light);
}

.feedback-sheet.error .feedback-title {
  color: var(--accent-error);
}

.feedback-subtitle {
  font-size: 0.95rem;
  color: var(--text-primary);
}

/* ==========================================================================
   RESULTS SUMMARY VIEW
   ========================================================================== */

.summary-container {
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 24px;
}

.trophy-glow-wrapper {
  position: relative;
  width: 140px;
  height: 140px;
  margin-bottom: 8px;
}

.trophy-glow-bg {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: radial-gradient(circle, rgba(255, 217, 84, 0.4) 0%, rgba(255, 217, 84, 0) 70%);
  filter: blur(20px);
  animation: pulseSlow 3s infinite ease-in-out;
}

@keyframes pulseSlow {
  0%, 100% { transform: scale(1); opacity: 0.6; }
  50% { transform: scale(1.2); opacity: 1; }
}

.trophy-badge {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(135deg, #ffe07e 0%, #eac32c 100%);
  border: 4px solid var(--bg-surface);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 12px 32px rgba(255, 217, 84, 0.4);
}

.trophy-badge span {
  font-size: 68px;
  color: #725c00;
}

/* Bento Metrics Grid */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  width: 100%;
}

.metric-card {
  background: linear-gradient(145deg, var(--bg-surface-container-high) 0%, var(--bg-surface-container) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 18px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.metric-card.featured {
  grid-column: span 2;
  flex-direction: row;
  justify-content: space-between;
  padding: 20px 24px;
}

.metric-number {
  font-family: var(--font-headline);
  font-size: 1.85rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 4px;
}

.metric-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  color: var(--text-muted);
}

/* ==========================================================================
   ACHIEVEMENT MODAL & CONFETTI CANVAS
   ========================================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: var(--modal-backdrop);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.modal-backdrop.visible {
  opacity: 1;
  pointer-events: auto;
}

.modal-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-surface-container);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  transform: scale(0.9) translateY(20px);
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: var(--glass-shadow);
}

.modal-backdrop.visible .modal-card {
  transform: scale(1) translateY(0);
}

.achievement-trophy-img {
  width: 160px;
  height: 160px;
  object-fit: contain;
  margin-bottom: 12px;
  animation: floatBounce 3s infinite ease-in-out;
  filter: drop-shadow(0 12px 24px rgba(255, 217, 84, 0.4));
}

@keyframes floatBounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

#confettiCanvas {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  pointer-events: none;
  z-index: 90;
}

/* ==========================================================================
   LEADERBOARD (DIAMOND LEAGUE)
   ========================================================================== */

.league-header-card {
  background: linear-gradient(135deg, var(--bg-surface-container-high) 0%, var(--bg-surface-container) 100%);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 20px;
}

.leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.leader-item {
  background: var(--bg-surface-container);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--transition-fast);
}

.leader-item:hover {
  transform: translateX(4px);
  background: var(--bg-surface-container-high);
}

.leader-item.is-current-user {
  background: linear-gradient(90deg, rgba(255, 217, 84, 0.12) 0%, var(--bg-surface-container-high) 100%);
  border: 2px solid var(--primary-yellow);
  box-shadow: 0 0 20px rgba(255, 217, 84, 0.25);
}

.leader-rank {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 1.25rem;
  width: 32px;
  text-align: center;
  color: var(--text-muted);
}

.leader-rank.top-1 { color: var(--accent-gold); font-size: 1.5rem; }
.leader-rank.top-2 { color: #94a3b8; font-size: 1.35rem; }
.leader-rank.top-3 { color: #d97706; font-size: 1.35rem; }

.leader-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 2px solid var(--border-subtle);
}

.leader-item.is-current-user .leader-avatar {
  border-color: var(--primary-yellow);
}

.leader-info {
  flex: 1;
}

.leader-name {
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}

.leader-badge-pill {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.leader-xp {
  font-family: var(--font-headline);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--primary-yellow);
}

/* ==========================================================================
   USER PROFILE & ANALYTICS
   ========================================================================== */

.profile-hero-card {
  background: linear-gradient(135deg, var(--bg-surface-container-high) 0%, var(--bg-surface-container) 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 32px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
}

.profile-avatar-box {
  position: relative;
  width: 100px;
  height: 100px;
}

.profile-avatar-img {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-full);
  object-fit: cover;
  border: 4px solid var(--accent-blue-light);
}

.profile-star-badge {
  position: absolute;
  bottom: 0;
  right: 0;
  background: var(--accent-gold);
  color: #231b00;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--bg-surface);
}

/* Course Progress Bars */
.course-card {
  background: var(--bg-surface-container);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 16px 20px;
  margin-bottom: 12px;
}

/* ==========================================================================
   DEVELOPER & AGENCY SHOWCASE FOOTER (Mobile One Media Services)
   ========================================================================== */

.developer-showcase-footer {
  margin-top: auto;
  background: linear-gradient(180deg, var(--bg-surface-container) 0%, var(--bg-surface) 100%);
  border-top: 2px solid var(--border-strong);
  padding: 48px 20px 40px;
  position: relative;
  z-index: 20;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-top-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.agency-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(255, 217, 84, 0.15) 0%, rgba(94, 235, 147, 0.15) 100%);
  border: 1px solid var(--border-strong);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary-yellow);
}

.agency-title {
  font-family: var(--font-headline);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-top: 8px;
}

.agency-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 500px;
  margin-top: 4px;
}

.agency-contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.contact-card-link {
  background: var(--bg-surface-container-high);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  text-decoration: none;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.contact-card-link:hover {
  transform: translateY(-3px);
  border-color: var(--accent-blue-light);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.contact-icon {
  width: 42px;
  height: 42px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
}

.contact-icon.web { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue-light); }
.contact-icon.mail { background: rgba(245, 158, 11, 0.15); color: var(--accent-gold); }
.contact-icon.call { background: rgba(34, 197, 94, 0.15); color: var(--accent-green-light); }

.contact-text-group {
  display: flex;
  flex-direction: column;
}

.contact-type-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 700;
}

.contact-val {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--text-primary);
  word-break: break-all;
}

.footer-bottom-bar {
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 120;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast-msg {
  background: var(--bg-surface-container-highest);
  color: var(--text-primary);
  border: 1px solid var(--border-strong);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-family: var(--font-headline);
  font-weight: 700;
  font-size: 0.9rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
  display: flex;
  align-items: center;
  gap: 8px;
  animation: slideDownToast 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes slideDownToast {
  from { opacity: 0; transform: translateY(-16px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .options-grid {
    grid-template-columns: 1fr;
  }
  .bento-grid {
    grid-template-columns: 1fr;
  }
  .metric-card.featured {
    grid-column: span 1;
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
  .agency-contact-grid {
    grid-template-columns: 1fr;
  }
}