:root{--paper:#f4f5f7;--paper-2:#eceef1;--card:#ffffff;--line:#dfe2e7;--ink:#1a1f27;--ink-2:#4a5361;--ink-3:#79828f;--accent:#2f5d8a;--accent-soft:#e5edf5;--known:#3f7a6d;--fragile:#c08a2e;--unknown:#a8523f;--untested:#8a8f99;--serif:"Hiragino Mincho ProN","Yu Mincho","YuMincho","Noto Serif JP","Times New Roman",serif;--sans:"Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic UI","Meiryo",system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"SF Mono",ui-monospace,"Menlo","Consolas",monospace}@media (prefers-color-scheme:dark){:root{--paper:#12151b;--paper-2:#171b22;--card:#1b2029;--line:#2a313c;--ink:#e9ecf1;--ink-2:#a7b0bd;--ink-3:#727c8a;--accent:#6fa3d6;--accent-soft:#1d2836;--known:#5aa392;--fragile:#d7a24a;--unknown:#cf7a63;--untested:#8a93a1}}:root[data-theme=light]{--paper:#f4f5f7;--paper-2:#eceef1;--card:#ffffff;--line:#dfe2e7;--ink:#1a1f27;--ink-2:#4a5361;--ink-3:#79828f;--accent:#2f5d8a;--accent-soft:#e5edf5;--known:#3f7a6d;--fragile:#c08a2e;--unknown:#a8523f;--untested:#8a8f99}:root[data-theme=dark]{--paper:#12151b;--paper-2:#171b22;--card:#1b2029;--line:#2a313c;--ink:#e9ecf1;--ink-2:#a7b0bd;--ink-3:#727c8a;--accent:#6fa3d6;--accent-soft:#1d2836;--known:#5aa392;--fragile:#d7a24a;--unknown:#cf7a63;--untested:#8a93a1}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.5;-webkit-font-smoothing:antialiased}.wrap{max-width:1080px;margin:0 auto;padding:0 24px}header{border-bottom:1px solid var(--line);position:sticky;top:0;background:color-mix(in srgb,var(--paper) 88%,transparent);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:5}.bar{display:flex;align-items:center;justify-content:space-between;height:60px}.brand{display:flex;align-items:baseline;gap:10px}.brand .mark{font-family:var(--serif);font-size:22px;letter-spacing:.01em}.brand .dot{width:6px;height:6px;border-radius:50%;background:var(--accent);display:inline-block;margin-bottom:2px}.brand .sub{font-size:12px;color:var(--ink-3);letter-spacing:.14em;text-transform:uppercase}.userchip{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--ink-2)}.userchip .who{display:flex;align-items:center;gap:7px;padding:5px 11px;border:1px solid var(--line);border-radius:999px;background:var(--card)}.g{width:14px;height:14px;border-radius:50%;background:conic-gradient(from -45deg,#ea4335 0,#ea4335 25%,#fbbc05 0,#fbbc05 50%,#34a853 0,#34a853 75%,#4285f4 0);flex:none}.userchip .signout{border:none;background:none;color:var(--ink-3);cursor:pointer;font-size:12px;padding:0;text-decoration:underline;text-underline-offset:2px}.userchip .signout:hover{color:var(--ink-2)}.ttoggle{width:30px;height:30px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink-2);cursor:pointer;font-size:14px}.hero{display:grid;grid-template-columns:150px 1fr;gap:40px;padding:44px 0 36px;align-items:stretch}.gauge{position:relative}.gauge .track{position:absolute;left:22px;top:6px;bottom:6px;width:8px;border-radius:6px;background:linear-gradient(to top,var(--accent-soft),color-mix(in srgb,var(--accent) 40%,transparent))}.gauge .fill{position:absolute;left:22px;bottom:6px;width:8px;border-radius:6px;background:linear-gradient(to top,var(--known),var(--accent));transition:height .6s ease}.ticks{position:relative;height:340px;margin-left:0}.tick{position:absolute;left:44px;display:flex;align-items:center;gap:10px;transform:translateY(50%)}.tick .lvl{font-family:var(--mono);font-size:12px;color:var(--ink-3);width:52px}.tick .nm{font-size:12px;color:var(--ink-2)}.tick.summit .lvl,.tick.summit .nm{color:var(--ink)}.youare{position:absolute;left:0;display:flex;align-items:center;gap:8px;transform:translateY(50%);transition:top .6s ease}.youare .pin{width:14px;height:14px;border-radius:50%;background:var(--card);border:3px solid var(--accent);margin-left:16px;box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 18%,transparent)}.heroinfo{display:flex;flex-direction:column;justify-content:center}.eyebrow{font-size:12px;letter-spacing:.16em;text-transform:uppercase;color:var(--accent);font-weight:600}.heroinfo h1{font-family:var(--serif);font-weight:500;font-size:clamp(30px,4.4vw,46px);line-height:1.12;text-wrap:balance;margin:.3em 0 .15em}.heroinfo .lede{color:var(--ink-2);font-size:16px;max-width:46ch}.bignum{display:flex;align-items:baseline;gap:14px;margin-top:22px}.bignum .n{font-family:var(--serif);font-size:52px;font-variant-numeric:tabular-nums;letter-spacing:-.01em}.bignum .of{color:var(--ink-3);font-size:15px}.bignum .of b{color:var(--ink-2);font-variant-numeric:tabular-nums;font-weight:600}section{padding:26px 0;border-top:1px solid var(--line)}.sechead{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:16px;gap:12px;flex-wrap:wrap}.sechead h2{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--ink-3);font-weight:600;margin:0}.frames{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.frame{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px}.frame .fn{font-family:var(--mono);font-size:12px;color:var(--ink-3);margin-bottom:6px}.frame .ft{font-size:15px;color:var(--ink);margin-bottom:12px}.frame .cnt{font-family:var(--serif);font-size:26px;font-variant-numeric:tabular-nums}.frame .cnt span{font-size:13px;color:var(--ink-3);font-family:var(--sans)}.barline{height:7px;border-radius:5px;background:var(--paper-2);display:flex;overflow:hidden;margin-top:12px}.barline i{display:block;height:100%}.legend{display:flex;gap:18px;flex-wrap:wrap;font-size:12.5px;color:var(--ink-2)}.legend span{display:inline-flex;align-items:center;gap:7px}.sw{width:10px;height:10px;border-radius:3px;display:inline-block}.flist{display:flex;flex-direction:column;gap:2px}.item{display:grid;grid-template-columns:14px 1fr auto;gap:16px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--card);transition:border-color .15s,transform .15s}.item:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));transform:translateY(-1px)}.stripe{width:4px;align-self:stretch;border-radius:4px;margin:2px 0}.term{min-width:0}.term .jp{font-family:var(--serif);font-size:22px;line-height:1.25}.term .rd{font-size:12.5px;color:var(--ink-3);margin-top:1px}.term .en{font-size:13.5px;color:var(--ink-2);margin-top:3px}.meta{display:flex;flex-direction:column;align-items:flex-end;gap:7px;text-align:right}.chip{font-size:11px;letter-spacing:.05em;text-transform:uppercase;font-weight:600;padding:3px 9px;border-radius:999px;border:1px solid}.ftag{font-family:var(--mono);font-size:11px;color:var(--ink-3)}.known-c{color:var(--known);border-color:color-mix(in srgb,var(--known) 40%,transparent);background:color-mix(in srgb,var(--known) 12%,transparent)}.fragile-c{color:var(--fragile);border-color:color-mix(in srgb,var(--fragile) 40%,transparent);background:color-mix(in srgb,var(--fragile) 12%,transparent)}.unknown-c{color:var(--unknown);border-color:color-mix(in srgb,var(--unknown) 40%,transparent);background:color-mix(in srgb,var(--unknown) 12%,transparent)}.untested-c{color:var(--untested);border-color:color-mix(in srgb,var(--untested) 40%,transparent);background:color-mix(in srgb,var(--untested) 12%,transparent)}.hm-legend{margin-bottom:16px}.heatmap{display:flex;flex-direction:column;gap:16px}.hm-band{display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:start}.hm-label{font-size:12px;color:var(--ink-2);padding-top:2px;line-height:1.3}.hm-label span{display:block;font-family:var(--mono);font-size:11px;color:var(--ink-3)}.hm-grid{display:grid;grid-template-columns:repeat(auto-fill,24px);gap:2px}.hm-cell{width:24px;height:24px;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:16px;line-height:1;border-radius:4px;cursor:pointer;color:var(--ink);border:1px solid transparent;transition:transform .08s,box-shadow .08s;background:color-mix(in srgb,var(--untested) 10%,var(--card))}.hm-cell:hover{transform:scale(1.28);box-shadow:0 2px 8px color-mix(in srgb,var(--ink) 22%,transparent);z-index:2;position:relative;border-color:color-mix(in srgb,var(--accent) 55%,transparent)}.hm-cell.hm-known{background:color-mix(in srgb,var(--known) 60%,var(--card))}.hm-cell.hm-fragile{background:color-mix(in srgb,var(--fragile) 55%,var(--card))}.hm-cell.hm-unknown{background:color-mix(in srgb,var(--unknown) 52%,var(--card))}.hm-cell.hm-untested{background:color-mix(in srgb,var(--untested) 10%,var(--card));color:var(--ink-2)}.hm-cell:focus-visible{outline:2px solid var(--accent);outline-offset:1px;transform:scale(1.28);z-index:2;position:relative}.hm-cell.sel{border-color:var(--accent);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 50%,transparent);z-index:1;position:relative}.kdetail{position:relative;margin-top:16px;border:1px solid var(--line);border-radius:14px;background:var(--card);padding:18px 18px 10px}.kd-close{position:absolute;top:9px;right:11px;border:none;background:none;color:var(--ink-3);font-size:22px;line-height:1;cursor:pointer;padding:2px 7px;border-radius:6px}.kd-close:hover{color:var(--ink);background:var(--paper-2)}.kd-head{display:grid;grid-template-columns:auto 1fr;gap:18px;align-items:center;padding:2px 30px 14px 0;border-bottom:1px solid var(--line);margin-bottom:12px}.kd-kanji{width:64px;height:64px;display:flex;align-items:center;justify-content:center;font-family:var(--serif);font-size:40px;border-radius:12px;border:1px solid var(--line);background:color-mix(in srgb,var(--untested) 12%,var(--card))}.kd-kanji.hm-known{background:color-mix(in srgb,var(--known) 55%,var(--card))}.kd-kanji.hm-fragile{background:color-mix(in srgb,var(--fragile) 50%,var(--card))}.kd-kanji.hm-unknown{background:color-mix(in srgb,var(--unknown) 48%,var(--card))}.kd-readings{font-family:var(--serif);font-size:15px;color:var(--ink-2)}.kd-meaning{font-size:14px;color:var(--ink);margin-top:2px}.kd-derive{font-size:12.5px;color:var(--ink-3);margin-top:7px;display:flex;align-items:center;gap:6px;flex-wrap:wrap}.kd-derive b{color:var(--ink-2);font-variant-numeric:tabular-nums}.kd-words{display:flex;flex-direction:column;gap:2px;max-height:520px;overflow-y:auto;padding-right:2px}.kd-word{padding:11px 14px}.kd-word .term .jp{font-size:19px}.modal-backdrop{position:fixed;top:0;right:0;bottom:0;left:0;z-index:50;display:flex;align-items:center;justify-content:center;padding:24px;background:color-mix(in srgb,var(--ink) 42%,transparent);-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}@media (prefers-reduced-motion:no-preference){.modal-backdrop{animation:mb-fade .12s ease}.kdetail.modal{animation:mb-rise .16s ease}}@keyframes mb-fade{0%{opacity:0}to{opacity:1}}@keyframes mb-rise{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}.kdetail.modal{margin:0;width:100%;max-width:640px;max-height:86vh;display:flex;flex-direction:column;box-shadow:0 24px 60px color-mix(in srgb,var(--ink) 45%,transparent)}.kdetail.modal .kd-head{flex:none}.kd-body{flex:1;min-height:0;overflow-y:auto;padding-right:2px}.kdetail.modal .kd-words{max-height:none;overflow:visible}.chip.jlpt-c{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 40%,transparent);background:color-mix(in srgb,var(--accent) 12%,transparent);font-family:var(--mono);letter-spacing:0}.chip.grade-c{color:var(--ink-3);border-color:var(--line);background:var(--paper-2);font-family:var(--mono);letter-spacing:0;text-transform:none}.vlevels{display:flex;flex-direction:column;gap:14px}.vlevel{display:grid;grid-template-columns:44px 1fr auto;gap:16px;align-items:center}.vl-name{font-family:var(--mono);font-size:14px;color:var(--ink-2);letter-spacing:.02em}.vl-bar .barline{height:12px;margin-top:0}.vl-cnt{font-family:var(--serif);font-size:18px;font-variant-numeric:tabular-nums;min-width:96px;text-align:right}.vl-cnt span{font-size:12px;color:var(--ink-3);font-family:var(--sans)}.builder{display:flex;flex-direction:column;gap:16px}.builder-controls{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.modetoggle{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden;background:var(--card);flex:none}.modetoggle button{border:none;background:none;color:var(--ink-2);font-family:var(--sans);font-size:12.5px;padding:8px 15px;cursor:pointer;letter-spacing:.02em;transition:background .15s,color .15s}.modetoggle button:not(.on):hover{color:var(--ink)}.modetoggle button.on{background:var(--accent-soft);color:var(--accent);font-weight:600}.selectwrap{position:relative;display:inline-flex;flex:1;min-width:220px}.selectwrap:after{content:"▾";position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--ink-3);pointer-events:none;font-size:11px}.builder select{-moz-appearance:none;appearance:none;-webkit-appearance:none;width:100%;border:1px solid var(--line);border-radius:9px;background:var(--card);color:var(--ink);font-family:var(--sans);font-size:14px;padding:9px 32px 9px 13px;cursor:pointer}.builder select:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.seedwrap{display:flex;gap:8px;flex:1;min-width:220px}.builder input.seed{flex:1;min-width:0;border:1px solid var(--line);border-radius:9px;background:var(--card);color:var(--ink);font-family:var(--serif);font-size:16px;padding:8px 13px}.builder input.seed::placeholder{font-family:var(--sans);font-size:14px;color:var(--ink-3)}.builder input.seed:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.builder .findbtn{flex:none;border:1px solid var(--line);border-radius:9px;background:var(--accent-soft);color:var(--accent);font-family:var(--sans);font-size:14px;font-weight:600;padding:9px 20px;cursor:pointer;transition:border-color .15s,transform .15s}.builder .findbtn:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));transform:translateY(-1px)}.wl-words{display:flex;flex-direction:column;gap:2px;max-height:560px;overflow-y:auto;padding-right:2px}.wl-words .seedrow{opacity:.45}footer{padding:30px 0 48px;color:var(--ink-3);font-size:12.5px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}.note{font-size:12px;color:var(--ink-3);background:var(--paper-2);border:1px dashed var(--line);border-radius:8px;padding:8px 12px;margin:18px 0 0;display:inline-block}.emptyfrontier{padding:22px 18px;border:1px dashed var(--line);border-radius:12px;background:var(--paper-2);color:var(--ink-2);font-size:14.5px;text-align:center}.signin{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:0;padding:24px;text-align:center}.signin .brand{margin-bottom:26px}.signin .brand .mark{font-size:30px}.signin h1{font-family:var(--serif);font-weight:500;font-size:clamp(26px,4vw,38px);line-height:1.14;margin:0 0 12px;max-width:20ch;text-wrap:balance}.signin p{color:var(--ink-2);font-size:15px;max-width:40ch;margin:0 0 30px}.gbtn{display:inline-flex;align-items:center;gap:12px;padding:12px 22px;border:1px solid var(--line);border-radius:999px;background:var(--card);color:var(--ink);font-family:var(--sans);font-size:15px;cursor:pointer;transition:border-color .15s,transform .15s}.gbtn:hover{border-color:color-mix(in srgb,var(--accent) 45%,var(--line));transform:translateY(-1px)}.gbtn:disabled{opacity:.6;cursor:default;transform:none}.gbtn .g{width:18px;height:18px}.signin .fine{margin-top:28px;font-size:12px;color:var(--ink-3)}.signin-top{position:absolute;top:18px;right:24px}.loading{min-height:100dvh;display:flex;align-items:center;justify-content:center;color:var(--ink-3);font-size:14px;letter-spacing:.04em}.errbox{max-width:520px;margin:40px auto;padding:16px 18px;border:1px solid color-mix(in srgb,var(--unknown) 45%,var(--line));border-radius:12px;background:color-mix(in srgb,var(--unknown) 8%,transparent);color:var(--ink-2);font-size:13.5px}@media (max-width:720px){.hero{grid-template-columns:1fr;gap:20px}.gauge{max-width:220px}.frames{grid-template-columns:1fr}.hm-band{grid-template-columns:1fr;gap:6px}.hm-label{padding-top:0}.hm-label span{display:inline;margin-left:6px}.vlevel{grid-template-columns:38px 1fr auto;gap:10px}.vl-cnt{min-width:74px}}