:root{--bg:#0f1419;--card:#1b2430;--card2:#222d3b;--ink:#eaf0f6;--muted:#9fb0c3;--accent:#4da3ff;--line:#2c3a4b;--good:#37c98a;}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
[hidden]{display:none!important}
html,body{margin:0;height:100%}
body{background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;display:flex;flex-direction:column;min-height:100dvh}
header{padding:10px 14px;border-bottom:1px solid var(--line);display:flex;gap:8px;align-items:center;flex-wrap:wrap;background:#0c1116;position:sticky;top:0;z-index:5}
header h1{font-size:15px;margin:0;font-weight:600;letter-spacing:.2px;flex:1;white-space:nowrap}
select,button{font-family:inherit;color:var(--ink);background:var(--card2);border:1px solid var(--line);border-radius:10px;padding:7px 10px;font-size:13px}
select{max-width:42vw}
.counter{color:var(--muted);font-size:12px;min-width:54px;text-align:right}
main{flex:1;display:flex;align-items:center;justify-content:center;padding:14px}
.card{width:100%;max-width:560px;min-height:62dvh;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:18px 18px 22px;display:flex;flex-direction:column;box-shadow:0 8px 30px rgba(0,0,0,.35);cursor:pointer;position:relative;overflow:auto}
.chips{display:flex;gap:6px;margin-bottom:10px;flex-wrap:wrap}
.chip{font-size:11px;padding:3px 9px;border-radius:999px;background:#13202e;border:1px solid var(--line);color:var(--accent)}
.chip.type{color:var(--muted)}
.front{font-size:19px;line-height:1.4;font-weight:550;flex:1;display:flex;align-items:center}
.imgwrap{margin:6px 0 12px;text-align:center}
.imgwrap img{max-width:100%;max-height:38dvh;border-radius:12px;border:1px solid var(--line)}
.tap{color:var(--muted);font-size:12px;text-align:center;margin-top:10px;opacity:.8}
.back{display:none}
.back h3{margin:.2em 0 .4em;font-size:13px;color:var(--good);text-transform:uppercase;letter-spacing:.5px}
.back ul{margin:.2em 0;padding-left:18px}
.back li{margin:.42em 0;line-height:1.45;font-size:15px}
.back p{margin:.6em 0;line-height:1.45;font-size:15px}
.back b{color:#fff}
.divider{height:1px;background:var(--line);margin:6px 0 12px}
.card.flipped{cursor:default}
footer{display:flex;gap:10px;padding:12px 14px calc(12px + env(safe-area-inset-bottom));border-top:1px solid var(--line);background:#0c1116}
footer button{flex:1;padding:13px;font-size:15px;font-weight:600;border-radius:12px}
.flip{background:var(--accent);border-color:var(--accent);color:#06121f}
.nav{background:var(--card2)}
.q{font-size:12px;color:var(--muted)}

.facets{margin-top:8px}
.facet{padding:9px 0;border-top:1px solid var(--line)}
.facet .label{color:var(--accent);font-weight:600;font-size:13px;margin-bottom:3px;display:inline-block}
.facet .fbody{line-height:1.5;font-size:15px}
.facet .fbody b{color:#fff}
/* Each tappable phrase. In study mode, tapping marks it red = "missed". */
.chunk{border-radius:5px;padding:0 2px}
.chunk.miss{background:#5a1f28;color:#ffd7dc;box-shadow:0 0 0 1px #7a2e36}
.study .chunk{cursor:pointer}
.study .facet .label{cursor:pointer}
.rate{display:flex;gap:8px;margin-top:14px}
.rate button{flex:1;padding:12px;border-radius:12px;font-size:15px}
.rate .done{background:#1d3a2a;border-color:#2f6f4f;font-weight:600}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(18px + env(safe-area-inset-bottom));padding:9px 16px;border-radius:999px;font-size:13px;font-weight:600;z-index:20;box-shadow:0 6px 20px rgba(0,0,0,.45);pointer-events:none}
.toast.ok{background:#1d3a2a;color:#7fe0b0;border:1px solid #2f6f4f}
.toast.err{background:#3a1d22;color:#ffb3bd;border:1px solid #7a2e36}