/* ==========================================================================
   🧩 VIBECARD COMPONENTS — /HUMAN-CRAFTED-UI EDITION
   1px Hairlines, Concentric Radii, Multi-Layer Ambient Shadows, Spring Press Physics
   ========================================================================== */

/* 1. Welcome Scenery Hero Card (65%–70% Screen Height + Interactive UI Artifact Preview) */
.welcome-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
  padding: 2px 0 2px;
}
.welcome-scenery-frame {
  position: relative;
  width: 100%;
  flex: 1;
  min-height: 380px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--m3-outline);
  background: #0D0E0B;
  box-shadow: 0 12px 32px rgba(15, 17, 13, 0.14);
}
.welcome-scenery-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 28%;
  opacity: 0.92;
  will-change: transform;
}
.welcome-scenery-scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10, 12, 10, 0.16) 0%, rgba(10, 12, 10, 0.34) 48%, rgba(10, 12, 10, 0.88) 100%);
}
.welcome-lumi-lantern {
  position: absolute;
  bottom: 6px;
  right: 6px;
  width: 144px;
  height: 144px;
  z-index: 4;
  pointer-events: none;
}
.welcome-lumi-lantern img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 10px 22px rgba(0, 0, 0, 0.6));
}
.welcome-badge-floating {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(18, 20, 18, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #FAF8F5;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.welcome-proof-pill {
  position: absolute;
  bottom: 14px;
  left: 14px;
  z-index: 4;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(18, 20, 18, 0.72);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #FAF8F5;
  font-size: 11.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.welcome-proof-pill b {
  color: #6EE7B7;
  font-weight: 700;
}

.welcome-editorial-copy {
  padding: 4px 2px 0;
  text-align: left;
  flex-shrink: 0;
}
.welcome-headline {
  font-family: var(--font-serif);
  font-size: 28px;
  font-weight: 700;
  line-height: 1.14;
  letter-spacing: -0.025em;
  text-wrap: balance;
  color: var(--m3-on-surface);
}
.welcome-headline em {
  font-style: italic;
  color: var(--m3-primary);
}
.welcome-subcopy {
  font-size: 14px;
  font-weight: 450;
  line-height: 1.5;
  max-width: 62ch;
  text-wrap: pretty;
  color: var(--m3-on-surface-variant);
  margin-top: 6px;
}

/* Full-Height Step Stage Wrapper (Eliminates Empty Bottom Space) */
.step-fill-stage {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 12px;
}

/* Shared Selection Check Ring (Larger 24x24 Target) */
.vc-check-ring {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1.5px solid var(--m3-outline);
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: transparent;
  transition: all 0.14s var(--ease-out-expo);
}
.is-selected .vc-check-ring {
  background: var(--m3-primary);
  border-color: var(--m3-primary);
  color: var(--m3-on-primary);
}

/* 2. Duolingo-Inspired Full-Width Tactile Option List & Signal Bars (Matches Image 1 & 2 in VibeCard Palette) */
.duo-section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2px 4px 0;
  font-family: var(--font-display);
  font-size: 16.5px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--m3-on-surface);
  flex-shrink: 0;
}
.duo-section-heading svg {
  color: var(--m3-on-surface-variant);
}

.duo-option-list {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 9px;
}
.duo-option-list.is-spacious-list {
  gap: 12px;
}

.duo-option-card {
  position: relative;
  width: 100%;
  flex: 1;
  min-height: 58px;
  padding: 12px 18px;
  border-radius: 16px;
  background: var(--vc-card-grad);
  border: 2px solid var(--m3-outline);
  border-bottom-width: 4px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  transition: transform 0.09s var(--ease-out-expo), background-color 0.14s ease, border-color 0.14s ease;
}
@media (hover: hover) and (pointer: fine) {
  .duo-option-card:hover { background: var(--vc-card-hover-grad); }
}
.duo-option-card:active {
  transform: translateY(2px);
  border-bottom-width: 2px;
}
.duo-option-card.is-selected {
  background: var(--vc-selected-bg);
  border-color: var(--m3-primary);
  box-shadow: 0 4px 14px rgba(31, 99, 72, 0.10);
}

.duo-flag-slot,
.duo-signal-slot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 36px;
}

.vc-signal-bars .sig-bar {
  fill: var(--m3-outline);
  opacity: 0.55;
  transition: fill 0.18s ease, opacity 0.18s ease;
}
.vc-signal-bars .sig-bar.is-filled {
  fill: var(--m3-primary);
  opacity: 1;
}

.vc-clock-icon {
  display: block;
  color: var(--m3-on-surface-variant);
  transition: transform 0.24s var(--ease-spring), color 0.18s ease;
}
.duo-option-card.is-selected .vc-clock-icon {
  color: var(--m3-primary);
  transform: scale(1.06);
}

.duo-option-label {
  flex: 1;
  min-width: 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--m3-on-surface);
  line-height: 1.32;
}
.tactile-option-card .duo-option-label {
  white-space: nowrap;
}
.duo-option-card.is-selected .duo-option-label {
  color: var(--m3-primary);
}

.duo-option-right-tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--m3-surface-container-low);
  border: 1px solid var(--m3-outline-variant);
  color: var(--m3-on-surface-variant);
  white-space: nowrap;
}
.duo-option-card.is-selected .duo-option-right-tag {
  background: var(--m3-primary);
  border-color: var(--m3-primary);
  color: var(--m3-on-primary);
}

/* 2-Column Language Bento Grid Fallback */
.language-bento-grid {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: 1fr;
  gap: 11px;
}
.lang-bento-card {
  position: relative;
  display: flex;
  align-items: center;
}
.lang-bento-title {
  flex: 1;
  min-width: 0;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--m3-on-surface);
  line-height: 1.25;
}
.lang-bento-sub {
  font-size: 12.5px;
  font-weight: 450;
  color: var(--m3-on-surface-variant);
  margin-top: 3px;
  line-height: 1.35;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Bottom Showcase Preview Card (Fills Bottom Space with Live Story Context) */
.step-bottom-showcase-card {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 13px 14px;
  border-radius: 18px;
  background: var(--vc-card-grad);
  border: 1px solid var(--m3-outline-variant);
  box-shadow: var(--vc-card-shadow);
  flex-shrink: 0;
  cursor: pointer;
  transition: transform 0.12s var(--ease-out-expo);
}
.step-bottom-showcase-card:active { transform: scale(0.985); }
.showcase-thumb {
  width: 58px;
  height: 58px;
  border-radius: 12px;
  object-fit: cover;
  border: 1px solid var(--m3-outline-variant);
  flex-shrink: 0;
}
.showcase-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.showcase-kicker {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--m3-primary);
}
.showcase-quote {
  font-family: var(--font-serif);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--m3-on-surface);
  line-height: 1.35;
}
.showcase-quote mark {
  background: var(--m3-primary-container);
  color: var(--m3-primary);
  font-family: var(--font-display);
  font-weight: 700;
  padding: 0 4px;
  border-radius: 4px;
}
.showcase-sub {
  font-size: 11.5px;
  color: var(--m3-on-surface-variant);
  line-height: 1.3;
}

/* 3. Option Cards (Large Full-Height Stack for Level & Daily Goal) */
.vibe-card-stack {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.vibe-card-stack.is-stretch-stack {
  flex: 1;
  justify-content: space-between;
}
.tactile-option-card {
  position: relative;
  display: flex;
  align-items: center;
  flex: 1;
  min-height: 76px;
  gap: 13px;
  padding: 13px 16px;
  border-radius: 18px;
  background: var(--vc-card-grad);
  border: 1px solid var(--m3-outline-variant);
  box-shadow: var(--vc-card-shadow);
  cursor: pointer;
  transition: transform 0.12s var(--ease-out-expo), background-color 0.15s ease, box-shadow 0.15s ease;
}
@media (hover: hover) and (pointer: fine) {
  .tactile-option-card:hover { background: var(--vc-card-hover-grad); }
}
.tactile-option-card:active {
  transform: scale(0.985);
}
.tactile-option-card.is-selected {
  background: var(--vc-selected-bg);
  border-color: var(--vc-selected-border);
  box-shadow: var(--vc-selected-shadow);
}
.daily-time-orb {
  width: 50px;
  height: 50px;
  border-radius: 13px;
  background: var(--m3-surface-container-low);
  border: 1px solid var(--m3-outline-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--m3-on-surface);
}
.tactile-option-card.is-selected .daily-time-orb {
  background: var(--m3-primary);
  border-color: var(--m3-primary);
  color: var(--m3-on-primary);
}
.option-content { flex: 1; min-width: 0; }
.option-title {
  font-family: var(--font-display);
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: -0.015em;
  color: var(--m3-on-surface);
  line-height: 1.25;
  font-variant-numeric: tabular-nums;
}
.option-subtitle {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 450;
  color: var(--m3-on-surface-variant);
  margin-top: 4px;
  line-height: 1.38;
}

/* Weekly Reading Rhythm Card on Daily Goal Screen */
.weekly-rhythm-card {
  padding: 13px 15px;
  border-radius: 18px;
  background: var(--vc-card-grad);
  border: 1px solid var(--m3-outline-variant);
  box-shadow: var(--vc-card-shadow);
  flex-shrink: 0;
}
.weekly-rhythm-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.weekly-rhythm-title {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--m3-primary);
}
.weekly-rhythm-badge {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 999px;
  background: var(--m3-primary-container);
  color: var(--m3-primary);
}
.weekly-days-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}
.weekly-day-pill {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  padding: 7px 4px;
  border-radius: 10px;
  background: var(--m3-surface-container-low);
  border: 1px solid var(--m3-outline-variant);
  font-family: var(--font-mono);
}
.weekly-day-pill.is-today {
  background: var(--m3-primary);
  border-color: var(--m3-primary);
  color: var(--m3-on-primary);
}
.weekly-day-name { font-size: 10.5px; font-weight: 700; }
.weekly-day-dot { font-size: 11px; font-weight: 700; }

/* 4. Sticky Bottom Action Zone — Large 56px Tactile Pill CTA */
.bottom-cta-bar {
  position: relative;
  z-index: 25;
  padding: 10px 20px calc(var(--safe-bottom) + 18px);
  margin-bottom: 4px;
  background: var(--m3-surface);
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.tactile-cta-btn {
  width: 100%;
  height: 56px;
  border-radius: 16px;
  background-color: var(--m3-primary);
  color: var(--m3-on-primary);
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.01em;
  border: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: inset 0 1px 0 0 rgba(255, 255, 255, 0.2), 0 6px 16px rgba(31, 99, 72, 0.24);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: transform 0.12s var(--ease-out-expo), filter 0.15s ease;
}
@media (hover: hover) and (pointer: fine) {
  .tactile-cta-btn:hover:not(:disabled) { filter: brightness(1.05); }
}
.tactile-cta-btn:active:not(:disabled) {
  transform: scale(0.98);
}
.tactile-cta-btn:disabled {
  background: var(--m3-surface-container-high);
  color: var(--m3-on-surface-variant);
  box-shadow: none;
  cursor: not-allowed;
}
.secondary-outline-btn {
  width: 100%;
  height: 46px;
  border-radius: 14px;
  background: transparent;
  color: var(--m3-on-surface-variant);
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  border: 1px solid var(--m3-outline-variant);
  cursor: pointer;
  transition: transform 0.12s var(--ease-out-expo), background-color 0.15s ease;
}
@media (hover: hover) and (pointer: fine) {
  .secondary-outline-btn:hover { background: var(--m3-surface-container-low); color: var(--m3-on-surface); }
}
.secondary-outline-btn:active {
  transform: scale(0.98);
}

/* 5. Duolingo-Style Centered "COURSE BUILDING..." Interstitial Screen (Zero %) */
.course-building-stage {
  flex: 1;
  width: 100%;
  min-height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 20px 28px 64px;
  cursor: pointer;
  user-select: none;
}

.course-building-art-wrap {
  position: relative;
  width: 168px;
  height: 168px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  margin-bottom: 26px;
}

.course-building-pedestal {
  position: absolute;
  bottom: 4px;
  width: 136px;
  height: 44px;
  border-radius: 50%;
  background: var(--m3-surface-container-highest);
  opacity: 0.72;
  z-index: 1;
}

.course-building-mascot {
  position: relative;
  z-index: 2;
  width: 112px;
  height: 112px;
  object-fit: contain;
  margin-bottom: -28px;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.14));
  animation: mascotReadingBob 2.2s ease-in-out infinite;
}

.course-building-books-svg {
  position: relative;
  z-index: 3;
  width: 144px;
  height: 84px;
  display: block;
  animation: booksStackFloat 2.2s ease-in-out infinite;
}

@keyframes mascotReadingBob {
  0%, 100% { transform: translateY(0) rotate(-1.5deg); }
  50% { transform: translateY(-5px) rotate(1.5deg); }
}

@keyframes booksStackFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-2.5px); }
}

.course-building-kicker {
  font-family: var(--font-display);
  font-size: 14.5px;
  font-weight: 800;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--m3-on-surface-variant);
  opacity: 0.75;
  margin-bottom: 14px;
  animation: kickerPulse 1.6s ease-in-out infinite;
}

@keyframes kickerPulse {
  0%, 100% { opacity: 0.82; }
  50% { opacity: 0.48; }
}

.course-building-copy {
  max-width: 286px;
  margin: 0 auto;
  font-family: var(--font-sans);
  font-size: 17px;
  font-weight: 500;
  line-height: 1.48;
  color: var(--m3-on-surface-variant);
}

.course-building-copy b,
.course-building-copy strong {
  color: var(--m3-on-surface);
  font-weight: 700;
}