.vocab-app { padding-bottom: 56px; }
.vocab-stats { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:12px; margin:18px 0; }
.stat-card { background:#fff; border:1px solid var(--line); border-radius:14px; padding:18px; box-shadow:0 6px 20px rgba(16,24,40,.04); }
.stat-number { display:block; font-size:30px; line-height:1; font-weight:900; color:var(--text); }
.stat-label { display:block; margin-top:8px; color:var(--muted); font-size:13px; font-weight:750; }
.review-panel { min-height:360px; }
.review-head,.library-toolbar { display:flex; justify-content:space-between; align-items:center; gap:14px; margin-bottom:18px; }
.review-head h2,.library-toolbar h2 { margin:4px 0 0; }
.eyebrow { color:var(--primary); text-transform:uppercase; letter-spacing:.08em; font-size:11px; font-weight:900; }
.review-empty { padding:54px 18px; text-align:center; color:var(--muted); line-height:1.7; border:1px dashed #cfd8e6; border-radius:14px; background:#fbfcfe; }
.review-card { max-width:760px; margin:0 auto; text-align:center; }
.review-source { font-size:13px; color:var(--muted); margin-bottom:16px; }
.review-prompt { font-size:clamp(23px,3.5vw,36px); line-height:1.55; font-weight:800; color:var(--text); margin:18px 0 24px; }
.review-blank { display:inline-block; min-width:100px; border-bottom:3px solid #98a2b3; color:transparent; user-select:none; }
.review-answer { margin-top:22px; border-top:1px solid var(--line); padding-top:22px; }
.review-word { font-size:clamp(24px,4vw,34px); font-weight:900; color:var(--primary); margin-bottom:10px; line-height:1.25; }
.review-sentence { font-size:19px; line-height:1.7; color:#344054; }
.review-sentence strong { font-weight:900; color:var(--text); }
.review-tools { display:flex; justify-content:center; gap:8px; flex-wrap:wrap; margin:16px 0 4px; }
.audio-status { min-height:20px; color:var(--muted); font-size:13px; margin-top:5px; }
.rating-label { margin-top:24px; margin-bottom:10px; color:var(--muted); font-size:13px; font-weight:750; }
.rating-grid { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:9px; }
.rate-btn { border:1px solid #d0d5dd; border-radius:12px; background:#fff; padding:12px 8px; cursor:pointer; color:var(--text); font:inherit; }
.rate-btn:hover { border-color:#84adff; background:#f5f9ff; }
.rate-btn strong,.rate-btn span { display:block; }
.rate-btn strong { font-size:14px; }
.rate-btn span { margin-top:3px; color:var(--muted); font-size:11px; }
.rate-again { border-color:#fda29b; }
.rate-easy { border-color:#86efac; }
.vocab-filter-row { display:flex; gap:8px; flex-wrap:wrap; }
.vocab-search,.vocab-filter { border:1px solid var(--line); border-radius:10px; padding:10px 12px; background:#fff; color:var(--text); font:inherit; }
.vocab-search { min-width:260px; }
.vocab-list { display:grid; gap:8px; }
.vocab-row { display:grid; grid-template-columns:minmax(150px,.75fr) minmax(260px,1.6fr) 110px 118px auto; gap:12px; align-items:center; padding:13px 14px; border:1px solid #e5e9f0; border-radius:12px; background:#fff; }
.vocab-main-word { font-weight:900; color:var(--text); font-size:17px; }
.vocab-source,.vocab-meta { color:var(--muted); font-size:12px; margin-top:3px; }
.vocab-sentence { color:#475467; line-height:1.45; font-size:14px; }
.vocab-due { font-size:12px; font-weight:800; color:#475467; }
.vocab-actions { display:flex; justify-content:flex-end; gap:6px; }
.vocab-delete { border:1px solid #fecdca; color:#b42318; background:#fff; border-radius:9px; padding:7px 9px; cursor:pointer; }
.vocab-list-empty { padding:35px; text-align:center; color:var(--muted); }
.review-mistake.review-save-word { font:inherit; cursor:pointer; border-top:0; border-left:0; border-right:0; }
.review-save-plus { font-size:.75em; margin-left:2px; opacity:.75; }
.review-mistake.review-save-word.saved { color:#027a48; background:#ecfdf3; border-bottom-color:#12b76a; }
@media (max-width:900px) {
  .vocab-stats { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .vocab-row { grid-template-columns:1fr auto; }
  .vocab-row > div:nth-child(2) { grid-column:1 / -1; grid-row:2; }
  .vocab-row > div:nth-child(3),.vocab-row > div:nth-child(4) { grid-row:3; }
  .vocab-actions { grid-column:2; grid-row:1; }
}
@media (max-width:620px) {
  .vocab-stats { grid-template-columns:1fr 1fr; }
  .review-head,.library-toolbar { align-items:flex-start; flex-direction:column; }
  .vocab-filter-row,.vocab-search,.vocab-filter { width:100%; min-width:0; }
  .rating-grid { grid-template-columns:1fr 1fr; }
  .vocab-row { grid-template-columns:1fr; }
  .vocab-row > div,.vocab-row > div:nth-child(2),.vocab-row > div:nth-child(3),.vocab-row > div:nth-child(4),.vocab-actions { grid-column:1; grid-row:auto; }
  .vocab-actions { justify-content:flex-start; }
}

.review-meaning { display:inline-block; margin:-2px 0 12px; padding:7px 11px; border-radius:9px; background:#eef6ff; color:#174ea6; font-size:16px; line-height:1.4; font-weight:800; }
.vocab-meaning { margin-top:4px; color:#174ea6; font-size:13px; font-weight:800; line-height:1.35; }

/* v17.6: active typing review */
.review-typebox { max-width:620px; margin:0 auto 8px; padding:18px; border:1px solid #dbe5f2; border-radius:14px; background:#f8fbff; }
.review-input-label { display:block; margin-bottom:9px; color:#344054; font-size:14px; font-weight:850; text-align:left; }
.review-input-row { display:grid; grid-template-columns:minmax(0,1fr) auto; gap:9px; }
.review-input { width:100%; min-width:0; border:2px solid #cbd5e1; border-radius:11px; padding:12px 13px; background:#fff; color:var(--text); font:inherit; font-size:18px; font-weight:750; outline:none; transition:border-color .15s, box-shadow .15s, background .15s; }
.review-input:focus { border-color:#84adff; box-shadow:0 0 0 4px rgba(46,111,229,.10); }
.review-input.is-correct { border-color:#12b76a; background:#f6fef9; }
.review-input.is-wrong { border-color:#f04438; background:#fff8f7; }
.review-input:disabled { opacity:1; color:#475467; }
.review-feedback { min-height:24px; margin-top:10px; text-align:left; font-size:14px; font-weight:800; }
.review-feedback.is-correct { color:#027a48; }
.review-feedback.is-wrong { color:#b42318; }
.review-feedback.is-shown { color:#175cd3; }
.review-show-answer { margin-top:6px; }
@media (max-width:620px) {
  .review-input-row { grid-template-columns:1fr; }
  .review-input-row .btn-primary { width:100%; }
}
.review-hint-meaning { display:inline-flex; align-items:baseline; justify-content:center; margin:-8px auto 12px; padding:7px 11px; border-radius:10px; background:#eef6ff; color:#174ea6; line-height:1.35; }
.review-hint-meaning span { font-size:12px; font-weight:750; opacity:.78; }
.review-hint-meaning strong { font-size:16px; font-weight:900; }

/* v17.9: compact Anki-style character diff for wrong vocabulary answers */
.review-feedback.has-comparison { color:var(--text); font-weight:600; }
.answer-comparison { margin-top:4px; padding:9px 12px; border:1px solid #fecdca; border-radius:12px; background:#fff7f6; text-align:left; }
.comparison-row { display:grid; grid-template-columns:112px minmax(0,1fr); gap:12px; align-items:baseline; padding:6px 0; }
.comparison-label { color:#667085; font-size:12px; font-weight:800; }
.comparison-word { display:inline-flex; align-items:baseline; flex-wrap:wrap; color:#101828; font-size:22px; line-height:1.35; font-weight:900; letter-spacing:.015em; }
.diff-error { color:#d92d20; background:#fee4e2; border-radius:4px; padding:0 1px; text-decoration:none; }
.diff-extra { text-decoration:line-through; text-decoration-thickness:2px; }
.diff-correction { color:#067647; background:#dcfae6; border-radius:4px; padding:0 2px; margin:0 1px; box-shadow:inset 0 -2px 0 #12b76a; }
@media (max-width:620px) {
  .comparison-row { grid-template-columns:1fr; gap:3px; }
  .comparison-word { font-size:20px; }
}