* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 0;
  background: linear-gradient(135deg, #FAF8F4 0%, #ECE7DB 100%);
  color: #1A1714;
  font-family: 'DM Sans', sans-serif;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.muted {
  color: #7A7470;
}

button {
  font-family: 'DM Sans', sans-serif;
  cursor: pointer;
  border: none;
  background: none;
}

/* Progress bar */
#progress-bar-track {
  width: 100%;
  height: 3px;
  background: #E8E4DF;
  flex-shrink: 0;
  position: absolute;
  top: 0;
  left: 0;
}

#progress-bar-fill {
  height: 100%;
  background: #C45C3A;
  transition: width 300ms ease;
  width: 0%;
  border-radius: 0 3px 3px 0;
  box-shadow: 0 0 8px rgba(196, 92, 58, 0.4);
}

#progress-label {
  text-align: center;
  font-size: 14px;
  color: #7A7470;
  margin: 16px 0 0;
  font-weight: 500;
}

/* Arena */
#card-arena {
  flex-grow: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
  padding: 20px;
}

/* Card Outer */
#card {
  width: 100%;
  max-width: 92vw;
  width: 360px;
  min-height: 480px;
  height: 65vh;
  max-height: 620px;
  position: relative;
  border-radius: 20px;
  user-select: none;
  touch-action: none;
  border: none;
  background: transparent;
  padding: 0;
  cursor: pointer;
  animation: slideUp 600ms cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}
#card:focus-visible { outline: 3px solid #C45C3A; outline-offset: 4px; }

/* Card Inner */
#card-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 400ms cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 16px 48px rgba(0,0,0,0.08), 0 4px 12px rgba(0,0,0,0.03);
  border-radius: 20px;
}

#card-inner.flipped {
  transform: rotateY(180deg);
}

.card-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  background: #fff;
  border-radius: 20px;
  padding: 20px;
  display: flex;
  flex-direction: column;
}

#card-back {
  transform: rotateY(180deg);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

#card-back::-webkit-scrollbar {
  width: 6px;
}
#card-back::-webkit-scrollbar-track {
  background: transparent;
}
#card-back::-webkit-scrollbar-thumb {
  background: rgba(0,0,0,0.1);
  border-radius: 10px;
}
#card-back::-webkit-scrollbar-thumb:hover {
  background: rgba(0,0,0,0.2);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Breakdown Section */
.breakdown-section {
  width: 100%;
  margin-top: 16px;
  text-align: left;
}
.section-divider {
  border: none;
  border-top: 1px dashed #E8E4DF;
  margin: 0 0 16px 0;
}
.breakdown-parts {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: flex-start;
  margin-bottom: 16px;
}
.part-chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: #FCFBFA;
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 12px;
  padding: 8px 10px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.03);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.part-chip:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
}
.part-chip-kannada {
  font-family: 'Noto Sans Kannada', sans-serif;
  font-size: 13px;
  font-weight: 500;
}
.part-chip-translit {
  font-size: 10px;
  color: #7A7470;
}
.part-chip-type {
  font-size: 9px;
  background: #F1EFE8;
  color: #7A7470;
  padding: 2px 6px;
  border-radius: 12px;
  margin: 4px 0;
}
.part-chip-meaning {
  font-size: 11px;
  color: #7A7470;
}
.part-chip-separator {
  color: #B4B2A9;
  font-size: 14px;
  margin: auto 2px;
  align-self: center;
}
.other-forms {
  display: grid;
  grid-template-columns: max-content auto;
  gap: 8px 12px;
  align-items: baseline;
}
.form-label {
  font-size: 10px;
  color: #7A7470;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.form-kannada {
  font-family: 'Noto Sans Kannada', sans-serif;
  font-size: 13px;
  font-weight: 500;
}
.form-translit {
  font-size: 11px;
  color: #7A7470;
  margin-left: 6px;
}
.form-hindi {
  font-size: 11px;
  color: #7A7470;
  margin-left: 4px;
}

/* Inflections Section */
.inflections-section {
  width: 100%;
  margin-top: 16px;
  text-align: left;
}
.inflections-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #7A7470;
  margin-bottom: 8px;
}
.inflection-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  gap: 8px;
  align-items: baseline;
  padding: 4px 0;
}
.inflection-row-verb {
  grid-template-columns: 40px 1fr 1fr;
}
.inflection-row.base-form {
  border-left: 2px solid #C45C3A;
  padding-left: 6px;
  margin-left: -8px;
}
.inf-label { font-size: 10px; color: #7A7470; }
.inf-kannada { font-family: 'Noto Sans Kannada', sans-serif; font-size: 13px; font-weight: 500; }
.inf-translit { font-size: 11px; color: #7A7470; }
.inf-note { font-size: 10px; color: #7A7470; font-style: italic; }

.inflection-tab-strip {
  display: flex;
  gap: 0;
  border-bottom: 1px solid #E8E4DF;
  margin-bottom: 8px;
}
.inflection-tab {
  padding: 4px 10px;
  font-size: 11px;
  cursor: pointer;
  color: #7A7470;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
}
.inflection-tab.active {
  border-bottom-color: #C45C3A;
  color: #C45C3A;
}

.verb-extras {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed #E8E4DF;
}
.verb-extra-row {
  display: grid;
  grid-template-columns: 80px 1fr 1fr;
  align-items: baseline;
  gap: 8px;
  font-size: 11px;
  padding: 2px 0;
}

/* Responsive Enhancements */
@media (min-width: 768px) {
  #card {
    width: 440px;
    height: 70vh;
    max-height: 680px;
  }
  .kannada-word {
    font-size: min(60px, 8vw);
    line-height: min(70px, 8vw);
  }
  .part-chip-kannada {
    font-size: 15px;
  }
}


/* Topbar */
.card-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 14px;
  font-weight: 500;
}

[id^="sentence-toggle"] {
  color: #C45C3A;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(196, 92, 58, 0.1);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
[id^="sentence-toggle"][aria-pressed="false"] {
  color: #7A7470;
  background: #F1EFE8;
}

/* Card Body */
.card-body {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 20px 0;
}

.kannada-word {
  font-family: 'Noto Sans Kannada', sans-serif;
  font-size: min(52px, 12vw);
  line-height: min(60px, 12vw);
  font-weight: 600;
  margin: 0;
}

.transliteration {
  font-size: 16px;
  margin: 4px 0 0;
}

.tap-hint {
  font-size: 12px;
  margin: 24px 0 0;
  opacity: 0.7;
}

.meaning {
  font-size: 18px;
  font-weight: 500;
  margin: 12px 0 0;
}

.pos-pill {
  font-size: 11px;
  background: #F1EFE8;
  color: #7A7470;
  padding: 2px 8px;
  border-radius: 20px;
  display: inline-block;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Sentence Section */
.sentence-section {
  width: 100%;
  max-height: 200px;
  overflow: hidden;
  opacity: 1;
  transition: max-height 300ms ease, opacity 300ms ease;
  text-align: center;
}

.sentence-divider {
  border: none;
  border-top: 1px dashed #E8E4DF;
  margin: 0 0 16px 0;
}

.sentence-kannada {
  font-family: 'Noto Sans Kannada', sans-serif;
  font-size: 14px;
  margin: 0 0 4px;
  font-weight: 500;
}
.sentence-translit {
  font-size: 12px;
  margin: 0 0 4px;
}
.sentence-hindi {
  font-size: 12px;
  margin: 0;
}

/* Action Buttons */
.action-buttons {
  display: flex;
  justify-content: space-between;
  padding: 16px 0 4px;
  gap: 12px;
}

.action-buttons button {
  flex: 1;
  padding: 12px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  transition: transform 150ms ease, background 150ms ease;
}

.action-buttons button:active {
  transform: scale(0.96);
}

.btn-know {
  border: 1.5px solid #C45C3A;
  color: #C45C3A;
  transition: all 150ms ease;
}
.btn-know:hover { background: rgba(196, 92, 58, 0.08); }
.btn-know:active { background: rgba(196, 92, 58, 0.15); transform: scale(0.96); }

.btn-dont-know {
  border: 1.5px solid #B4B2A9;
  color: #7A7470;
  transition: all 150ms ease;
}
.btn-dont-know:hover { background: rgba(180, 178, 169, 0.08); }
.btn-dont-know:active { background: rgba(180, 178, 169, 0.15); transform: scale(0.96); }

/* Swipe Labels */
.swipe-label {
  position: absolute;
  top: 20px;
  font-weight: 600;
  font-size: 18px;
  opacity: 0;
  z-index: 10;
  pointer-events: none;
  padding: 6px 16px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 12px rgba(0,0,0,0.1);
  transition: opacity 100ms ease;
}

.swipe-know {
  right: -20px;
  transform: rotate(10deg);
  color: #2D7A4F;
  border: 2px solid #2D7A4F;
}

.swipe-dont {
  left: -20px;
  transform: rotate(-10deg);
  color: #A32D2D;
  border: 2px solid #A32D2D;
}

/* Summary Screen */
#summary {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 24px;
  text-align: center;
  animation: fadeIn 400ms ease;
}

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

#summary h2 {
  font-size: 24px;
  margin: 0 0 24px;
  color: #1A1714;
}

.summary-stats {
  display: flex;
  gap: 24px;
  margin-bottom: 32px;
}

.summary-stats span {
  font-size: 18px;
  font-weight: 600;
  padding: 16px 24px;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 4px 16px rgba(0,0,0,0.06);
  border: 1px solid rgba(0,0,0,0.04);
}

#known-count { color: #2D7A4F; }
#unknown-count { color: #A32D2D; }

#missed-thumbnails {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  max-width: 400px;
  margin-bottom: 32px;
  max-height: 30vh;
  overflow-y: auto;
  padding-bottom: 8px;
}

.missed-thumb {
  font-family: 'Noto Sans Kannada', sans-serif;
  padding: 10px 16px;
  background: #fff;
  color: #C45C3A;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  border: 1px solid rgba(196, 92, 58, 0.1);
  transition: transform 0.2s ease;
}
.missed-thumb:hover {
  transform: translateY(-2px);
}

#summary button {
  width: 100%;
  max-width: 300px;
  padding: 16px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  transition: all 200ms ease;
}
#summary button:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
#summary button:active {
  transform: translateY(0) scale(0.98);
}
#summary button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

#btn-review-missed {
  background: #1A1714;
  color: #fff;
}

#btn-new-session {
  background: transparent;
  color: #C45C3A;
  border: 2px solid #C45C3A;
}