/* ASY OS V163 — Duolingo Sync Center */
.duo-center{display:grid;gap:16px}
.duo-connect-card,.duo-account-card,.duo-block,.duo-system-link,.duo-info-grid>div,.duo-insight{
  border:1px solid var(--line);background:linear-gradient(145deg,#0d0d0c,#070707);border-radius:20px
}
.duo-connect-card{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:18px;align-items:center;padding:24px;border-color:#4a3923;background:radial-gradient(circle at 90% 0,rgba(214,179,106,.08),transparent 34%),linear-gradient(145deg,#11100e,#070707)}
.duo-connect-mark{width:64px;height:64px;border-radius:18px;display:grid;place-items:center;font-size:30px;font-weight:950;background:#151109;border:1px solid #4a3923;color:#e2c17d}
.duo-connect-copy h3,.duo-account-card h3,.duo-block h3,.duo-system-link h3{margin:4px 0 7px;font-size:20px}
.duo-connect-copy p,.duo-section-head p,.duo-system-link p{margin:0;color:var(--muted);line-height:1.6;font-size:12.5px;max-width:850px}
.duo-connect-actions,.duo-sync-actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap;justify-content:flex-end}
.duo-safety-row,.duo-link-tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:12px}
.duo-safety-row span,.duo-link-tags span{padding:6px 9px;border:1px solid #30291f;border-radius:999px;color:#b8afa2;background:#0c0b09;font-size:11px}
.duo-info-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}
.duo-info-grid>div{padding:16px}.duo-info-grid b{display:block;font-size:13px}.duo-info-grid span{display:block;color:var(--muted);font-size:11.5px;line-height:1.55;margin-top:6px}
.duo-account-card{padding:20px;border-color:#4a3923;background:radial-gradient(circle at 92% -20%,rgba(214,179,106,.10),transparent 34%),linear-gradient(145deg,#11100e,#070707)}
.duo-account-top{display:flex;justify-content:space-between;align-items:center;gap:18px}
.duo-identity{display:flex;align-items:center;gap:13px}.duo-avatar{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:#151109;border:1px solid #4a3923;color:#e2c17d;font-size:21px;font-weight:900}
.duo-identity h3{margin:3px 0 2px}.duo-identity p{margin:0;color:var(--muted);font-size:11.5px}
.duo-sync-state{font-size:11px;color:#98c7aa}.duo-sync-state.error{color:#e1a0a0}
.duo-error{margin-top:12px;padding:10px 12px;border:1px solid #563036;background:#241315;color:#e8b1b1;border-radius:12px;font-size:11.5px}
.duo-kpis{display:grid;grid-template-columns:repeat(8,minmax(0,1fr));gap:8px;margin-top:18px}
.duo-kpis>div{padding:13px;border:1px solid #26221c;border-radius:14px;background:#090908;min-width:0}.duo-kpis b{display:block;font-size:19px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.duo-kpis span{display:block;margin-top:5px;color:var(--muted);font-size:10.5px}
.duo-block{padding:19px}.duo-section-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:14px}.duo-section-head h3{margin:3px 0 5px}
.duo-course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.duo-course-card{padding:15px;border:1px solid #26221c;border-radius:16px;background:#090908}.duo-course-card.active{border-color:#5a4529;background:linear-gradient(145deg,#121009,#090807)}
.duo-course-head{display:flex;align-items:center;gap:10px}.duo-course-head>div{min-width:0;flex:1}.duo-course-head b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:13.5px}.duo-course-head small{display:block;color:var(--muted);font-size:10.5px;margin-top:3px;text-transform:uppercase}
.duo-course-flag{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;background:#15120e;border:1px solid #30291f;font-size:18px}
.duo-course-xp{font-size:26px;font-weight:850;margin:16px 0 10px}.duo-course-xp small{font-size:10px;color:var(--muted);font-weight:600}
.duo-course-mini{display:grid;grid-template-columns:repeat(3,1fr);gap:5px}.duo-course-mini span{font-size:9.5px;color:var(--muted);border-top:1px solid #211e19;padding-top:8px}.duo-course-mini b{display:block;color:var(--text);font-size:11.5px;margin-bottom:2px}
.duo-insight-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px}.duo-insight{padding:15px}.duo-insight>span{display:block;color:var(--muted);font-size:9.5px;letter-spacing:.1em}.duo-insight b{display:block;font-size:23px;margin:7px 0 3px}.duo-insight small{color:var(--muted);font-size:10.5px}
.duo-chart{height:160px;display:grid;grid-template-columns:repeat(14,minmax(0,1fr));gap:6px;align-items:end;padding:12px 2px 0;border-bottom:1px solid #2b251d}.duo-bar-col{height:100%;display:grid;grid-template-rows:1fr 18px;align-items:end;gap:5px}.duo-bar-col span{display:block;min-height:4px;border-radius:6px 6px 2px 2px;background:linear-gradient(180deg,#e0c17b,#8f6b36)}.duo-bar-col small{text-align:center;color:var(--muted2);font-size:8px;white-space:nowrap;overflow:hidden}
.duo-history-list{display:grid;gap:5px;margin-top:12px}.duo-history-row{display:grid;grid-template-columns:1.5fr repeat(3,1fr);gap:8px;padding:9px 10px;border:1px solid #211e19;border-radius:12px;background:#090908}.duo-history-row>div b{display:block;font-size:11.5px}.duo-history-row>div span{display:block;color:var(--muted);font-size:9.5px;margin-top:2px}
.duo-system-link{padding:19px;display:grid;grid-template-columns:minmax(0,1.5fr) minmax(260px,1fr);gap:20px;align-items:center;border-color:#4a3923}.duo-link-tags{margin:0;justify-content:flex-end}
.duo-footnote{color:var(--muted2);font-size:10.5px;padding:0 4px 8px;line-height:1.55}
.duo-loading{display:flex;align-items:center;justify-content:center;gap:10px;padding:60px 20px;color:var(--muted)}.duo-loading>div{width:18px;height:18px;border:2px solid #3a3022;border-top-color:#d6b36a;border-radius:50%;animation:duoSpin .7s linear infinite}@keyframes duoSpin{to{transform:rotate(360deg)}}
.duo-modal-note{padding:12px 13px;margin-bottom:12px;border:1px solid #30291f;border-radius:13px;background:#0c0b09}.duo-modal-note b{font-size:12px}.duo-modal-note p{margin:4px 0 0;color:var(--muted);font-size:11px;line-height:1.5}
@media(max-width:1180px){.duo-kpis{grid-template-columns:repeat(4,1fr)}.duo-course-grid{grid-template-columns:repeat(2,1fr)}.duo-info-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){
  .duo-connect-card{grid-template-columns:1fr;padding:17px}.duo-connect-mark{width:48px;height:48px}.duo-connect-actions,.duo-sync-actions{justify-content:flex-start}.duo-account-top,.duo-section-head{align-items:flex-start;flex-direction:column}.duo-kpis{grid-template-columns:repeat(2,1fr)}.duo-course-grid,.duo-info-grid,.duo-insight-grid{grid-template-columns:1fr}.duo-system-link{grid-template-columns:1fr}.duo-link-tags{justify-content:flex-start}.duo-history-row{grid-template-columns:1.4fr 1fr}.duo-history-row>div:nth-child(n+3){display:none}.duo-chart{gap:3px;height:125px}.duo-bar-col small{font-size:7px}
}
/* V164 · Permanent history + comprehensive period intelligence */
.duo-retention-strip{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin-top:16px}
.duo-retention-strip>div{padding:11px 12px;border:1px solid #2a251e;border-radius:13px;background:#090908;min-width:0}
.duo-retention-strip span{display:block;color:var(--muted);font-size:9.5px;text-transform:uppercase;letter-spacing:.08em}
.duo-retention-strip b{display:block;margin-top:5px;font-size:11.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.duo-kpis-top{grid-template-columns:repeat(4,minmax(0,1fr))}
.duo-period-block{display:grid;gap:14px}
.duo-period-nav{display:flex;gap:7px;flex-wrap:wrap}
.duo-period-nav button,.duo-archive-toggle button{appearance:none;border:1px solid #2c261e;background:#0b0a09;color:#aaa196;border-radius:999px;padding:8px 12px;font:inherit;font-size:11px;font-weight:750;cursor:pointer}
.duo-period-nav button.active,.duo-archive-toggle button.active{border-color:#6b512f;background:#191208;color:#e6c77f}
.duo-metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}
.duo-metric{padding:14px;border:1px solid #26221c;border-radius:15px;background:#090908;min-width:0}
.duo-metric>span{display:block;color:var(--muted);font-size:9.5px;text-transform:uppercase;letter-spacing:.08em}
.duo-metric>b{display:block;font-size:20px;margin:7px 0 5px}
.duo-metric>div{min-height:28px}
.duo-metric small{display:block;color:var(--muted2);font-size:9.5px;margin-top:4px}
.duo-delta{display:inline-flex;align-items:center;border-radius:999px;padding:3px 7px;font-size:9px;font-weight:800;margin-right:6px}
.duo-delta.up{background:#112019;color:#86d9a8;border:1px solid #244d35}
.duo-delta.down{background:#241315;color:#e0a4a4;border:1px solid #563036}
.duo-delta.neutral{background:#151515;color:#a9a39a;border:1px solid #2c2925}
.duo-compare{padding:18px;border:1px solid var(--line);background:linear-gradient(145deg,#0d0d0c,#070707);border-radius:20px}
.duo-compare-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px}
.duo-compare-grid>div{padding:14px;border:1px solid #26221c;border-radius:14px;background:#090908}
.duo-compare-grid span{display:block;color:var(--muted);font-size:9.5px;text-transform:uppercase;letter-spacing:.08em}
.duo-compare-grid b{display:block;font-size:19px;margin:6px 0 3px}
.duo-compare-grid small{display:block;color:var(--muted2);font-size:9.5px;margin-bottom:7px}
.duo-chart-wide{overflow-x:auto;align-items:end}
.duo-archive-toggle{display:flex;gap:6px;flex-wrap:wrap}
.duo-archive-table{display:grid;gap:5px;overflow:auto}
.duo-archive-head,.duo-archive-row{display:grid;grid-template-columns:1.1fr repeat(7,minmax(82px,1fr)) 64px;gap:8px;min-width:920px}
.duo-archive-head{padding:0 10px 6px;color:var(--muted2);font-size:9px;text-transform:uppercase;letter-spacing:.08em}
.duo-archive-row{padding:10px;border:1px solid #211e19;border-radius:12px;background:#090908}
.duo-archive-row span{min-width:0}
.duo-archive-row b{display:block;font-size:11.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.duo-archive-row small{display:block;color:var(--muted);font-size:9px;margin-top:3px}
@media(max-width:980px){
  .duo-retention-strip{grid-template-columns:repeat(2,minmax(0,1fr))}
  .duo-metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .duo-compare-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:620px){
  .duo-retention-strip,.duo-metric-grid,.duo-compare-grid,.duo-kpis-top{grid-template-columns:1fr 1fr}
  .duo-period-nav{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}
  .duo-period-nav button{padding:8px 4px;font-size:10px}
  .duo-metric>b{font-size:18px}
}

.duo-archive-open{display:flex;align-items:center;justify-content:flex-end}.duo-archive-open button{appearance:none;border:1px solid #4f3d25;background:#151109;color:#dfc17e;border-radius:9px;padding:7px 9px;font:inherit;font-size:9.5px;font-weight:850;cursor:pointer}.duo-period-nav button.custom{grid-column:auto/span 2}


/* V166 · Unified language Period Intelligence readability */
.duo-period-block .duo-section-head .label{font-size:11.5px;letter-spacing:.12em}
.duo-period-block .duo-section-head h3{font-size:24px;line-height:1.18;margin-top:5px}
.duo-period-block .duo-section-head p{font-size:14px;line-height:1.65}
.duo-period-block .duo-period-nav button{font-size:13px;padding:9px 14px}
.duo-period-block .duo-metric{padding:16px}
.duo-period-block .duo-metric>span{font-size:11.5px;line-height:1.35}
.duo-period-block .duo-metric>b{font-size:24px;line-height:1.15;margin:8px 0 6px}
.duo-period-block .duo-metric small{font-size:11.5px;line-height:1.45;margin-top:5px}
.duo-period-block .duo-delta{font-size:10.5px;padding:4px 8px}
@media(max-width:620px){
  .duo-period-block .duo-section-head .label{font-size:10.5px}
  .duo-period-block .duo-section-head h3{font-size:22px}
  .duo-period-block .duo-section-head p{font-size:13px}
  .duo-period-block .duo-period-nav button{font-size:11.5px;padding:9px 5px}
  .duo-period-block .duo-metric{padding:14px}
  .duo-period-block .duo-metric>span{font-size:10.5px}
  .duo-period-block .duo-metric>b{font-size:21px}
  .duo-period-block .duo-metric small{font-size:10.5px}
}