.field{gap:4px;width:100%;display:grid}.field i{aspect-ratio:1;background:var(--u-unknown);border-radius:2px;display:block}.field i.nw{background:var(--u-knew)}.field i.h{background:var(--u-learned)}.field i.l{background:var(--u-learning)}.legend{flex-wrap:wrap;gap:16px 20px;margin-top:20px;display:flex}.legend .item{color:var(--muted);align-items:center;gap:8px;font-size:12px;display:flex}.legend .sw{background:var(--u-unknown);border-radius:2px;width:10px;height:10px}.legend .sw.nw{background:var(--u-knew)}.legend .sw.h{background:var(--u-learned)}.legend .sw.l{background:var(--u-learning)}.legend .item b{color:var(--ink);font-variant-numeric:tabular-nums;font-weight:600}.home{flex-direction:column;flex:1;padding:24px 0 32px;display:flex}.wordmark{letter-spacing:-.01em;color:var(--ink);font-size:15px;font-weight:600}.known{margin-top:40px}.known-head{margin-bottom:22px}.known-num{letter-spacing:-.02em;color:var(--ink);font-size:40px;font-weight:600}.known-num .unit{color:var(--muted);letter-spacing:0;font-size:18px;font-weight:500}.known-label{letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-top:8px;font-size:10.5px;font-weight:600}.start-wrap{margin-top:auto;padding-top:40px}.start{gap:12px;position:relative}.start .due{background:#faf7f129;border-radius:12px;justify-content:center;align-items:center;min-width:24px;height:24px;padding:0 7px;font-size:13px;font-weight:600;display:inline-flex;position:absolute;right:16px}.caught-up{text-align:center;padding:14px 0}.cu-num{color:var(--muted);font-size:34px;font-weight:600}.cu-label{color:var(--faint);margin-top:4px;font-size:13px}.settings-link{color:var(--faint);background:0 0;border:none;align-self:center;margin-top:18px;font-size:12.5px;font-weight:500}.card-stage{flex-direction:column;flex:1;min-height:0;display:flex}.topbar{justify-content:space-between;align-items:center;padding:14px 0 0;display:flex}.progress{align-items:center;gap:10px;display:flex}.progress .count{color:var(--faint);font-size:11.5px;font-weight:500}.progress .count b{color:var(--muted);font-weight:600}.track{background:var(--hair);border-radius:2px;width:48px;height:3px;overflow:hidden}.track i{background:var(--ink);border-radius:2px;height:100%;display:block}.front{flex-direction:column;flex:1;justify-content:center;display:flex}.front .lead{color:var(--faint);text-align:center;margin-bottom:26px;font-size:12.5px;font-weight:500}.audio{border:1px solid var(--hair);background:#1b2a4503;border-radius:8px;overflow:hidden}.audio .arow{text-align:left;background:0 0;border:none;align-items:center;gap:14px;width:100%;padding:15px 16px;display:flex}.audio .arow+.arow{border-top:1px solid var(--hair)}.audio .disc{background:var(--ink);border-radius:50%;flex:none;justify-content:center;align-items:center;width:38px;height:38px;transition:transform .14s ease-out;display:flex}.audio .arow:active .disc{transform:scale(.94)}.audio .disc .tri{border-top:7px solid #0000;border-bottom:7px solid #0000;border-left:11px solid var(--paper);width:0;height:0;margin-left:3px}.audio .meta .k{letter-spacing:.14em;text-transform:uppercase;color:var(--faint);font-size:10.5px;font-weight:600}.audio .dur{color:var(--faint);margin-left:auto;font-size:11.5px;font-weight:500}.audio .arow.playing .disc{background:var(--accent)}.audio .arow.playing .dur{color:var(--accent)}.audio.frontnew .arow:first-child .disc{background:var(--accent)}.back{flex-direction:column;flex:1;display:flex}.scene{background:#e7e2d8 50%/cover no-repeat;border-radius:8px;flex:none;height:150px;margin:14px 0}.ctx{margin-top:28px}.ctx-toggle{text-align:left;background:0 0;border:none;align-items:center;gap:7px;width:100%;padding:0;display:flex}.ctx-lbl{letter-spacing:.03em;color:var(--faint);font-size:11px;font-weight:500}.ctx-toggle .chev{border-top:4px solid #0000;border-bottom:4px solid #0000;border-left:5px solid var(--faint);flex:none;width:0;height:0;transition:transform .16s ease-out}.ctx.open .ctx-toggle .chev{transform:rotate(90deg)}.ctx-panel{overflow:hidden}.ctx-text{color:var(--muted);padding-top:9px;font-size:13.5px;font-weight:400;line-height:1.65}.wordline{align-items:center;gap:12px;display:flex}.wordline .w{color:var(--ink);letter-spacing:-.01em;flex:none;font-size:26px;font-weight:500}.wordline .ipa{color:var(--muted);flex:1;font-size:14px;font-weight:400}.wordline .pos{color:var(--faint);flex:none;font-size:14px;font-style:italic;font-weight:400}.iplay{background:var(--ink);border:none;border-radius:50%;flex:none;justify-content:center;align-items:center;width:27px;height:27px;transition:transform .14s ease-out;display:inline-flex}.iplay:active{transform:scale(.92)}.iplay.playing{background:var(--accent)}.iplay .tri{border-top:5px solid #0000;border-bottom:5px solid #0000;border-left:8px solid var(--paper);width:0;height:0;margin-left:2px}.sentence{color:var(--ink);letter-spacing:-.012em;align-items:flex-start;gap:13px;margin-top:20px;font-size:21px;font-weight:500;line-height:1.45;display:flex}.sentence .stext{flex:1}.sentence .iplay{margin-top:4px}.sentence .target{color:var(--accent);font-weight:600}.sentence-jp{color:var(--muted);margin-top:11px;font-size:15px;font-weight:400;line-height:1.6}.defs{flex-direction:column;gap:22px;margin-top:26px;display:flex}.def .lbl{letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-bottom:9px;font-size:10.5px;font-weight:600}.def .en{color:var(--ink-body);font-size:15px;line-height:1.6}.def .jp{color:var(--ink-body);font-size:15px;line-height:1.7}.actions{padding:18px 0 28px}.pair{gap:12px;display:flex}.pair .btn{flex:1}.park{text-align:center;color:var(--faint);background:0 0;border:none;width:100%;margin-top:16px;font-size:12.5px;font-weight:500}.opts{flex-direction:column;gap:10px;display:flex}.opt{text-align:center;border:1px solid var(--hair-strong);width:100%;color:var(--ink);letter-spacing:-.01em;background:0 0;border-radius:7px;padding:16px 15px;font-size:14.5px;font-weight:600}.opt.primary{border-color:var(--ink);background:var(--ink);color:var(--paper)}.study{flex-direction:column;flex:1;min-height:0;display:flex}.session-done{flex-direction:column;flex:1;justify-content:center;gap:28px;padding-bottom:32px;display:flex}.sd-plate{text-align:center}.sd-num{color:var(--ink);letter-spacing:-.02em;font-size:56px;font-weight:600}.sd-label{letter-spacing:.14em;text-transform:uppercase;color:var(--faint);margin-top:6px;font-size:12px;font-weight:600}.sheet-backdrop{z-index:50;background:#1b2a4547;justify-content:center;align-items:flex-end;display:flex;position:fixed;inset:0}.sheet{background:var(--paper);border-radius:20px 20px 0 0;width:100%;max-width:480px;padding:10px 24px 32px}.grab{background:var(--hair-strong);border-radius:2px;width:36px;height:4px;margin:0 auto 14px}.sheet-head{justify-content:space-between;align-items:center;margin-bottom:24px;display:flex}.sheet-title{color:var(--ink);font-size:17px;font-weight:600}.sheet-x{color:var(--faint);background:0 0;border:none;font-size:24px;line-height:1}.row{justify-content:space-between;align-items:center;gap:16px;padding:6px 0 18px;display:flex}.row-label{color:var(--ink);font-size:15px;font-weight:500}.row-help{color:var(--faint);max-width:220px;margin-top:3px;font-size:12.5px}.stepper{align-items:center;gap:14px;display:flex}.stepper button{border:1px solid var(--hair-strong);width:34px;height:34px;color:var(--ink);background:0 0;border-radius:8px;font-size:18px}.stepper .num{text-align:center;min-width:24px;font-size:17px;font-weight:600}.account{padding-top:18px}.account .email{color:var(--muted);margin:6px 0 18px;font-size:14px}.signout{height:48px}.gate{flex-direction:column;flex:1;min-height:0;padding:0 6px 34px;display:flex}.gate-top{text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;min-height:0;padding:24px 0;display:flex}.gate .mark{letter-spacing:.14em;color:var(--ink);text-transform:uppercase;font-size:17px;font-weight:600}.gate .mark-rule{background:var(--hair-strong);width:30px;height:1px;margin:22px auto 0}.gate .orient{color:var(--muted);letter-spacing:-.005em;max-width:240px;margin-top:26px;font-size:16px;font-weight:400;line-height:1.55}.gate .orient .ja{color:var(--faint);letter-spacing:.01em;margin-top:9px;font-size:13px;line-height:1.7;display:block}.gate-act{flex-direction:column;flex:none;display:flex}.gbtn{cursor:pointer;background:var(--paper);width:100%;height:54px;color:var(--ink);border:1px solid var(--hair-strong);letter-spacing:-.01em;border-radius:7px;justify-content:center;align-items:center;gap:12px;font-family:inherit;font-size:15px;font-weight:600;transition:transform .14s ease-out,background .14s ease-out;display:flex}.gbtn:active{background:#1b2a4505;transform:translateY(.5px)}.gbtn svg{flex:none;display:block}.gbtn-ghost{cursor:pointer;width:100%;height:52px;color:var(--ink);border:1px solid var(--hair-strong);letter-spacing:-.01em;background:0 0;border-radius:7px;justify-content:center;align-items:center;gap:9px;font-family:inherit;font-size:15px;font-weight:600;transition:transform .14s ease-out,background .14s ease-out;display:flex}.gbtn-ghost:active{background:#1b2a4505;transform:translateY(.5px)}.gbtn-ghost svg{color:var(--muted);flex:none;display:block}.gate-note{text-align:center;color:var(--faint);letter-spacing:.01em;max-width:250px;margin-top:18px;margin-left:auto;margin-right:auto;font-size:12px;font-weight:400;line-height:1.5}.gate-mark{border:1px solid var(--hair-strong);width:46px;height:46px;color:var(--muted);border-radius:50%;flex:none;justify-content:center;align-items:center;margin-bottom:30px;display:flex}.state-h{letter-spacing:-.015em;color:var(--ink);text-wrap:balance;max-width:230px;font-size:22px;font-weight:600;line-height:1.28}.state-sub{color:var(--muted);max-width:256px;margin-top:14px;font-size:14.5px;font-weight:400;line-height:1.6}.state-sub .ja{color:var(--faint);letter-spacing:.01em;margin-top:10px;font-size:12.5px;line-height:1.7;display:block}.acct{border:1px solid var(--hair);color:var(--ink-body);letter-spacing:-.005em;background:#1b2a4503;border-radius:7px;align-items:center;gap:9px;margin-top:24px;padding:9px 14px;font-size:13px;font-weight:500;display:inline-flex}.acct .gdot{background:var(--faint);border-radius:50%;flex:none;width:7px;height:7px}.state-note{text-align:center;color:var(--faint);letter-spacing:.01em;max-width:250px;margin-top:18px;margin-left:auto;margin-right:auto;font-size:12px;font-weight:400;line-height:1.5}.loader{width:34px;height:34px;margin-top:54px;position:relative}.loader .ring{border:1px solid var(--hair);border-radius:50%;position:absolute;inset:0}.loader .sweep{border:1px solid #0000;border-top-color:var(--muted);border-radius:50%;animation:2.6s cubic-bezier(.5,0,.5,1) infinite tov-sweep;position:absolute;inset:0}.loader .core{background:var(--accent);border-radius:50%;width:5px;height:5px;animation:2.6s ease-in-out infinite tov-breathe;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes tov-sweep{to{transform:rotate(360deg)}}@keyframes tov-breathe{0%,to{opacity:.32;transform:translate(-50%,-50%)scale(.78)}50%{opacity:1;transform:translate(-50%,-50%)scale(1)}}.loading-note{letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-top:28px;font-size:12px;font-weight:600}@media (prefers-reduced-motion:reduce){.loader .sweep{animation:none}.loader .core{opacity:.85;animation:none}}:root{--paper:#faf7f1;--ink:#1b2a45;--ink-body:#26324d;--muted:#5b6480;--faint:#8a8f9e;--accent:#dd6e33;--hair:#1b2a451f;--hair-strong:#1b2a4538;--stage:#edeae3;--u-knew:#1b2a45d1;--u-learned:var(--accent);--u-learning:#1b2a4566;--u-unknown:#1b2a4521;--font-latin:"Switzer", -apple-system, system-ui, sans-serif;--font-jp:"Zen Kaku Gothic New", "Switzer", sans-serif}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility}body{font-family:var(--font-latin);background:var(--paper);color:var(--ink);line-height:1.5}button{cursor:pointer;font-family:inherit}.ja{font-family:var(--font-jp)}.num{font-variant-numeric:tabular-nums}.shell{flex-direction:column;width:100%;max-width:480px;min-height:100dvh;margin:0 auto;padding:0 24px;display:flex}.btn{letter-spacing:-.01em;border:none;border-radius:7px;justify-content:center;align-items:center;width:100%;height:54px;font-size:15px;font-weight:600;display:flex}.btn-primary{background:var(--ink);color:var(--paper)}.btn-ghost{color:var(--ink);border:1px solid var(--hair-strong);background:0 0}.rule{background:var(--hair);height:1px}.tag{letter-spacing:.16em;text-transform:uppercase;align-items:center;gap:8px;font-size:10.5px;font-weight:600;display:inline-flex}.tag.new{color:var(--accent)}.tag.new .pip{background:var(--accent);border-radius:50%;width:6px;height:6px}.tag.review{color:var(--muted)}.cap{border:1px solid var(--hair);min-width:18px;height:18px;color:var(--faint);letter-spacing:.02em;font-variant-numeric:tabular-nums;background:#1b2a450a;border-radius:4px;justify-content:center;align-items:center;margin-left:8px;padding:0 5px;font-size:10.5px;font-weight:600;line-height:1;display:none}.btn-primary .cap,.opt.primary .cap{color:#faf7f1cc;background:#faf7f124;border-color:#faf7f138}.kbd-foot{color:var(--faint);letter-spacing:.01em;justify-content:center;align-items:center;gap:12px;margin-top:18px;font-size:11.5px;font-weight:500;display:none}.kbd-foot .pairing{align-items:center;display:inline-flex}.kbd-foot .pairing .cap{margin-left:0;margin-right:7px}.kbd-foot .sep{background:var(--hair);width:1px;height:11px}.kbd-hint{color:var(--faint);justify-content:center;align-items:center;margin-top:14px;font-size:11.5px;font-weight:500;display:none}.kbd-hint .cap{margin-left:0;margin-right:7px}@media (hover:hover) and (pointer:fine){.cap{display:inline-flex}.kbd-foot{display:flex}.kbd-hint{display:inline-flex}}