@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-sans-cyrillic-ext-400-normal-g30qAdWV.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-ext-400-normal-Dsrv2Tcn.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-sans-cyrillic-400-normal-DZqxrq2p.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-400-normal-BTotfTJu.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-sans-greek-400-normal-_efipK4i.woff2)format("woff2"),url(/assets/ibm-plex-sans-greek-400-normal-D9ESIMu3.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-sans-vietnamese-400-normal-DG4YqDda.woff2)format("woff2"),url(/assets/ibm-plex-sans-vietnamese-400-normal-fK1oJ5dG.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-sans-latin-ext-400-normal-C5H60-Va.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-ext-400-normal-RBey6euL.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-sans-latin-400-normal-CDDApCn2.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-400-normal-CYLoc0-x.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-sans-cyrillic-ext-500-normal-Cs5J6C77.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-ext-500-normal-DB5PtV2g.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-sans-cyrillic-500-normal-CocWQlwt.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-500-normal-ByOcLdNv.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-sans-greek-500-normal-JMMifIXV.woff2)format("woff2"),url(/assets/ibm-plex-sans-greek-500-normal-CuWXN6rf.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-sans-vietnamese-500-normal-e4dixQRQ.woff2)format("woff2"),url(/assets/ibm-plex-sans-vietnamese-500-normal-BEb3_waV.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-sans-latin-ext-500-normal-DakdToA3.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-ext-500-normal-D0aIdm-b.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:500;src:url(/assets/ibm-plex-sans-latin-500-normal-6ng42L7E.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-500-normal-BgVn5rGT.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-sans-cyrillic-ext-600-normal-DUMzJB7m.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-ext-600-normal-Bz0x94Yp.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-sans-cyrillic-600-normal-71GNu3SW.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-600-normal-BGq0mW3O.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-sans-greek-600-normal-DzTrcv_p.woff2)format("woff2"),url(/assets/ibm-plex-sans-greek-600-normal-D-CqTdkO.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-sans-vietnamese-600-normal-DpPYBSTl.woff2)format("woff2"),url(/assets/ibm-plex-sans-vietnamese-600-normal-DgdngZtN.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-sans-latin-ext-600-normal-DOrvGEcy.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-ext-600-normal-DIrixKbi.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-sans-latin-600-normal-CuJfVYMP.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-600-normal-Cu4Hd6ag.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/ibm-plex-sans-cyrillic-ext-700-normal-BmRLXWpJ.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-ext-700-normal-DCQwxkRk.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/ibm-plex-sans-cyrillic-700-normal-D_uavGvn.woff2)format("woff2"),url(/assets/ibm-plex-sans-cyrillic-700-normal-RFb1v-CK.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/ibm-plex-sans-greek-700-normal-wyJ6jzdA.woff2)format("woff2"),url(/assets/ibm-plex-sans-greek-700-normal-CkZN0sRy.woff)format("woff");unicode-range:U+370-377,U+37A-37F,U+384-38A,U+38C,U+38E-3A1,U+3A3-3FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/ibm-plex-sans-vietnamese-700-normal-CkEo6LDy.woff2)format("woff2"),url(/assets/ibm-plex-sans-vietnamese-700-normal-BV5B8Are.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/ibm-plex-sans-latin-ext-700-normal-aMgXseD4.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-ext-700-normal-DZH6Xh-4.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Sans;font-style:normal;font-display:swap;font-weight:700;src:url(/assets/ibm-plex-sans-latin-700-normal-Bxkt5Cjx.woff2)format("woff2"),url(/assets/ibm-plex-sans-latin-700-normal-Bth3BMcD.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-cyrillic-ext-400-normal-xuaO2J-f.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-ext-400-normal-DMdlQ8Kv.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-cyrillic-400-normal-BSMlKf0J.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-400-normal-CEL4l2ZJ.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-vietnamese-400-normal-BulugwFq.woff2)format("woff2"),url(/assets/ibm-plex-mono-vietnamese-400-normal-DDuiU_S-.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-latin-ext-400-normal-BmRBH3aV.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-ext-400-normal-D3D2R8hC.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:400;src:url(/assets/ibm-plex-mono-latin-400-normal-DMJ8VG8y.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-400-normal-CvHOgSBP.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-mono-cyrillic-ext-600-normal-V-xxqcpd.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-ext-600-normal-9HEixskS.woff)format("woff");unicode-range:U+460-52F,U+1C80-1C8A,U+20B4,U+2DE0-2DFF,U+A640-A69F,U+FE2E-FE2F}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-mono-cyrillic-600-normal-CTOM6hUh.woff2)format("woff2"),url(/assets/ibm-plex-mono-cyrillic-600-normal-fLZuRloM.woff)format("woff");unicode-range:U+301,U+400-45F,U+490-491,U+4B0-4B1,U+2116}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-mono-vietnamese-600-normal-D2EvbN8M.woff2)format("woff2"),url(/assets/ibm-plex-mono-vietnamese-600-normal-iLQfcSjf.woff)format("woff");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-mono-latin-ext-600-normal-D38SheWl.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-ext-600-normal-DmB0ttJJ.woff)format("woff");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:IBM Plex Mono;font-style:normal;font-display:swap;font-weight:600;src:url(/assets/ibm-plex-mono-latin-600-normal-BgSNZQsw.woff2)format("woff2"),url(/assets/ibm-plex-mono-latin-600-normal-DWFSQ4vo.woff)format("woff");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}:root{--ink:#0e1116;--panel:#151a21;--panel2:#1b2129;--panel3:#232a34;--line:#2b333e;--line2:#3a4452;--text:#e8e3d8;--muted:#98a2ae;--faint:#6b7581;--amber:#f2b33d;--amber-ink:#2a1e05;--paper:#f3ecdc;--paper2:#e9e0cb;--paper-ink:#2b2418;--paper-muted:#6e6352;--green:#4cc38a;--green-bg:#12301f;--red:#ef6b5b;--red-bg:#3a1714;--blue:#7ab1ff;--radius:10px;--mono:"IBM Plex Mono", ui-monospace, monospace;--sans:"IBM Plex Sans", system-ui, sans-serif}*{box-sizing:border-box}html,body,#root{height:100%}body{background:var(--ink);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0;font-size:15px;line-height:1.5}a{color:var(--amber)}button,input,select,textarea{font:inherit;color:inherit}code,.mono{font-family:var(--mono);font-size:.92em}h1,h2,h3{margin:0 0 .5em;line-height:1.2}p{margin:0 0 .7em}.btn{border:1px solid var(--line2);background:var(--panel2);color:var(--text);cursor:pointer;white-space:nowrap;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:8px 14px;font-weight:500;text-decoration:none;transition:background .12s,border-color .12s;display:inline-flex}.btn:hover{background:var(--panel3);border-color:var(--faint)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn.primary{background:var(--amber);border-color:var(--amber);color:var(--amber-ink);font-weight:600}.btn.primary:hover{filter:brightness(1.07)}.btn.green{background:var(--green);border-color:var(--green);color:#06210f;font-weight:600}.btn.ghost{color:var(--muted);background:0 0;border-color:#0000}.btn.ghost:hover{color:var(--text);background:var(--panel2)}.btn.danger{color:var(--red);background:0 0;border-color:#5a2a25}.btn.small{padding:4px 10px;font-size:13px}.btn.big{padding:12px 20px;font-size:16px}kbd{font-family:var(--mono);opacity:.7;border:1px solid;border-radius:4px;padding:1px 5px;font-size:11px}.input{background:var(--panel);border:1px solid var(--line2);border-radius:8px;outline:none;width:100%;padding:10px 12px}.input:focus{border-color:var(--amber)}.input.big{letter-spacing:.08em;font-size:20px;font-family:var(--mono);text-align:center}label.field{margin-bottom:12px;display:block}label.field>span{color:var(--muted);margin-bottom:4px;font-size:13px;display:block}.check{cursor:pointer;align-items:center;gap:8px;display:flex}.topbar{z-index:30;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);background:#0e1116eb;align-items:center;gap:12px;padding:10px 20px;display:flex;position:sticky;top:0}.brand{color:var(--text);align-items:center;gap:10px;text-decoration:none;display:flex}.brand-mark{font-family:var(--mono);letter-spacing:.14em;border:2px solid var(--amber);color:var(--amber);border-radius:4px;padding:3px 8px;font-size:12px;font-weight:600;transform:rotate(-2deg)}.brand-name{letter-spacing:.02em;font-weight:600}.topbar .spacer{flex:1}.topbar .who{color:var(--muted);font-size:13px}.page{max-width:1180px;margin:0 auto;padding:28px 20px 80px}.page.narrow{max-width:720px}.row{flex-wrap:wrap;align-items:center;gap:12px;display:flex}.col{flex-direction:column;gap:12px;display:flex}.muted{color:var(--muted)}.faint{color:var(--faint)}.small{font-size:13px}.center{text-align:center}.grow{flex:1}.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.card h2,.card h3{margin-top:0}.pill{background:var(--panel3);color:var(--muted);border:1px solid var(--line2);border-radius:99px;align-items:center;gap:4px;padding:2px 9px;font-size:12px;display:inline-flex}.pill.amber{color:var(--amber);background:#241b08;border-color:#5c4614}.pill.green{color:var(--green);background:var(--green-bg);border-color:#1f5a3b}.pill.red{color:var(--red);background:var(--red-bg);border-color:#5a2a25}.preview-banner{color:#cdb9ff;text-align:center;background:#2a2140;border-bottom:1px solid #44356b;padding:6px;font-size:13px}.error-box{background:var(--red-bg);color:#ffc9c1;border:1px solid #5a2a25;border-radius:8px;padding:10px 12px}.ok-box{background:var(--green-bg);color:#b8f0d2;border:1px solid #1f5a3b;border-radius:8px;padding:10px 12px}.paper{background:var(--paper);color:var(--paper-ink);border-radius:var(--radius);background-image:repeating-linear-gradient(#0000 0 27px,#2b24180f 27px 28px);padding:22px 24px;position:relative;box-shadow:0 1px #ffffff0a,0 10px 30px #00000059}.paper .muted{color:var(--paper-muted)}.paper code{background:#2b241814;border-radius:4px;padding:1px 5px}.paper strong{color:#1a140b}.stamp{font-family:var(--mono);letter-spacing:.14em;text-transform:uppercase;color:#9c2f1f;border:2px solid #9c2f1f;border-radius:3px;padding:2px 8px;font-size:11px;font-weight:600;display:inline-block;transform:rotate(-3deg)}.tape{background:repeating-linear-gradient(45deg, var(--amber) 0 14px, #1b1b1b 14px 28px);opacity:.9;border-radius:2px;width:140px;height:18px;position:absolute;top:-10px;left:50%;transform:translate(-50%)rotate(-2deg)}.chat{flex-direction:column;gap:10px;display:flex}.bubble{align-items:flex-start;gap:10px;display:flex}.avatar{background:var(--amber);width:34px;height:34px;color:var(--amber-ink);border-radius:50%;flex:none;place-items:center;font-size:14px;font-weight:700;display:grid}.bubble-text{background:var(--panel2);border:1px solid var(--line);border-radius:4px 14px 14px;max-width:680px;padding:10px 14px}.bubble-text code{background:var(--panel3);color:var(--amber);border-radius:4px;padding:1px 5px}.hero{flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:26px;display:flex}.hero h1{margin-bottom:4px;font-size:30px}.kicker{font-family:var(--mono);letter-spacing:.16em;text-transform:uppercase;color:var(--amber);font-size:12px}.progress{background:var(--panel3);border-radius:99px;width:260px;height:8px;overflow:hidden}.progress>div{background:var(--amber);border-radius:99px;height:100%;transition:width .4s}.lessons{gap:16px;display:grid}.lesson{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden}.lesson.locked{opacity:.55}.lesson-head{cursor:pointer;align-items:center;gap:16px;padding:16px 18px;display:flex}.lesson-no{width:46px;height:46px;font-family:var(--mono);background:var(--panel3);color:var(--muted);border-radius:10px;flex:none;place-items:center;font-size:18px;font-weight:600;display:grid}.lesson.open .lesson-no{color:var(--amber);background:#241b08;border:1px solid #5c4614}.lesson.done .lesson-no{background:var(--green-bg);color:var(--green);border:1px solid #1f5a3b}.lesson-body{gap:16px;padding:0 18px 18px;display:grid}.missions{grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px;display:grid}.mission-tile{background:var(--panel2);border:1px solid var(--line);color:var(--text);border-radius:10px;flex-direction:column;gap:6px;min-height:82px;padding:12px 14px;text-decoration:none;transition:border-color .12s,transform .12s;display:flex}.mission-tile:hover{border-color:var(--amber);transform:translateY(-1px)}.mission-tile.locked{pointer-events:none;opacity:.45}.mission-tile.solved{border-color:#1f5a3b}.mission-tile .mid{font-family:var(--mono);color:var(--faint);font-size:11px}.mission-tile .mtitle{font-weight:500;line-height:1.3}.mission-tile.bonus{border-style:dashed}.stars{color:var(--amber);letter-spacing:2px;font-size:13px}.stars .off{color:var(--line2)}.mission-layout{grid-template-columns:minmax(320px,420px) 1fr;gap:20px;max-width:1500px;margin:0 auto;padding:20px;display:grid}@media (width<=980px){.mission-layout{grid-template-columns:1fr;padding:14px}}.side{flex-direction:column;gap:16px;display:flex}.dots{flex-wrap:wrap;gap:6px;display:flex}.dot{background:var(--line2);border-radius:99px;width:26px;height:8px;display:block}.dot.solved{background:var(--green)}.dot.current{background:var(--amber)}.dot.bonus{opacity:.6}.task{font-size:16px}.story{color:var(--paper-muted);border-left:3px solid var(--paper2);margin-bottom:14px;padding-left:12px;font-style:italic}.hint{color:#4a3b12;background:#fff8e3;border:1px dashed #c9a447;border-radius:8px;margin-top:8px;padding:8px 12px}.hint code{background:#0000000f}.work{flex-direction:column;gap:12px;min-width:0;display:flex}.editor-wrap{border:1px solid var(--line2);border-radius:var(--radius);background:#0b0e12;overflow:hidden}.editor-wrap:focus-within{border-color:var(--amber)}.editor-bar{background:var(--panel);border-top:1px solid var(--line);flex-wrap:wrap;align-items:center;gap:8px;padding:8px;display:flex}.cm-editor{min-height:150px;font-size:15px}.cm-editor.cm-focused{outline:none}.cm-scroller{font-family:var(--mono)!important}.feedback{border-radius:10px;align-items:flex-start;gap:10px;padding:12px 14px;display:flex}.feedback.bad{background:var(--red-bg);color:#ffd2cb;border:1px solid #5a2a25}.feedback.good{background:var(--green-bg);color:#c6f5dd;border:1px solid #1f5a3b}.feedback.info{background:var(--panel2);border:1px solid var(--line);color:var(--text)}.feedback .icon{font-size:18px;font-weight:700;line-height:1.2}.result{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);overflow:hidden}.result-head{border-bottom:1px solid var(--line);color:var(--muted);justify-content:space-between;align-items:center;padding:8px 12px;font-size:13px;display:flex}.table-scroll{max-height:420px;overflow:auto}table.data{border-collapse:collapse;width:100%;font-family:var(--mono);font-size:13px}table.data th{background:var(--panel2);text-align:left;color:var(--amber);border-bottom:1px solid var(--line2);white-space:nowrap;padding:7px 12px;font-weight:600;position:sticky;top:0}table.data td{border-bottom:1px solid var(--line);white-space:nowrap;padding:5px 12px}table.data tr:hover td{background:var(--panel2)}table.data td.null{color:var(--faint);font-style:italic}.answer-row{align-items:flex-end;gap:10px;display:flex}.query-box{font-family:var(--mono);border:1px solid var(--line2);white-space:pre-wrap;color:var(--amber);background:#0b0e12;border-radius:8px;padding:12px 14px}.teacher-qr{opacity:.55;align-items:center;gap:10px;display:flex}.teacher-qr:hover{opacity:1}.teacher-qr img{background:#fff;border-radius:4px;width:64px;height:64px}.parsons{flex-direction:column;gap:12px;display:flex}.blocks{border:1px dashed var(--line2);background:var(--panel);border-radius:10px;flex-wrap:wrap;gap:8px;min-height:52px;padding:10px;display:flex}.blocks.answer{border-color:var(--amber);background:#0b0e12;border-style:solid}.block{font-family:var(--mono);background:var(--panel3);border:1px solid var(--line2);cursor:pointer;border-radius:7px;padding:7px 12px}.block:hover{border-color:var(--amber)}.blocks.answer .block{color:var(--amber);background:#241b08;border-color:#5c4614}.drawer-backdrop{z-index:60;background:#00000073;position:fixed;inset:0}.drawer{z-index:61;background:var(--panel);border-left:1px solid var(--line2);flex-direction:column;width:min(820px,100vw);animation:.18s ease-out slidein;display:flex;position:fixed;top:0;bottom:0;right:0}@keyframes slidein{0%{opacity:0;transform:translate(30px)}}.drawer-head{border-bottom:1px solid var(--line);align-items:center;gap:10px;padding:14px 18px;display:flex}.drawer-head h2{margin:0;font-size:18px}.drawer-body{flex:1;padding:18px;overflow:auto}.erd{border:1px solid var(--line);background:#0b0e12;border-radius:10px;width:100%;height:auto}.erd .tbl{cursor:pointer}.erd .tbl:hover rect.frame{stroke:var(--amber)}.erd text{font-family:var(--mono);font-size:12px}.erd .col-row{cursor:copy}.erd .col-row:hover rect{fill:#241b08}.legend{color:var(--muted);flex-wrap:wrap;gap:14px;margin:8px 0 14px;font-size:12px;display:flex}.sheet-section{border:1px solid var(--line);background:var(--panel2);border-radius:10px;margin-bottom:12px;padding:14px 16px}.sheet-section h3{color:var(--amber);margin-bottom:8px;font-size:15px}.sheet-section pre{border:1px solid var(--line);font-family:var(--mono);white-space:pre-wrap;background:#0b0e12;border-radius:6px;margin:6px 0;padding:8px 10px;font-size:13px;overflow:auto}.sheet-section .lbl{text-transform:uppercase;letter-spacing:.1em;color:var(--faint);font-size:11px}.mistake{color:#ffb4a8;font-size:13px}.flow{flex-wrap:wrap;align-items:center;gap:6px;margin:6px 0;display:flex}.flow .chip{font-family:var(--mono);background:var(--panel3);border:1px solid var(--line2);border-radius:6px;padding:4px 8px;font-size:12px}.flow .arrow{color:var(--faint)}.overlay{z-index:80;background:#05080ad1;place-items:center;padding:16px;animation:.2s fadein;display:grid;position:fixed;inset:0;overflow:auto}@keyframes fadein{0%{opacity:0}}.solved-card{border:2px solid var(--green);text-align:center;background:linear-gradient(160deg,#123524,#0d241a 60%);border-radius:18px;width:min(540px,100%);padding:26px;animation:.35s cubic-bezier(.2,1.4,.4,1) pop;box-shadow:0 30px 80px #0009}.solved-card.lesson{border-color:var(--amber);background:linear-gradient(160deg,#3a2a08,#1e1606 60%)}@keyframes pop{0%{opacity:0;transform:scale(.85)}}.solved-title{font-family:var(--mono);letter-spacing:.3em;color:var(--green);font-size:13px;font-weight:600}.solved-card.lesson .solved-title{color:var(--amber)}.solved-card h2{margin:10px 0 2px;font-size:24px}.solved-name{font-size:18px;font-weight:600}.solved-grid{text-align:left;grid-template-columns:1fr auto;align-items:center;gap:18px;margin:20px 0 14px;display:grid}.code-big{font-family:var(--mono);letter-spacing:.08em;color:#fff;font-size:40px;font-weight:600;line-height:1.1}.solved-card .qr{background:#fff;border-radius:8px;width:132px;height:132px;padding:4px}.clock{font-family:var(--mono);color:var(--muted);align-items:center;gap:6px;font-size:14px;display:inline-flex}.clock .live{background:var(--green);border-radius:50%;width:8px;height:8px;animation:1s infinite blink}.solved-card.lesson .clock .live{background:var(--amber)}@keyframes blink{50%{opacity:.25}}.big-stars{color:var(--amber);letter-spacing:6px;font-size:28px}.big-stars .off{color:#ffffff26}.login-wrap{place-items:center;min-height:100%;padding:20px;display:grid}.login-card{width:min(440px,100%)}.admin-nav{flex-wrap:wrap;gap:4px;display:flex}.admin-nav a{color:var(--muted);border-radius:8px;padding:6px 12px;font-size:14px;text-decoration:none}.admin-nav a.active,.admin-nav a:hover{background:var(--panel2);color:var(--text)}.tabs{border-bottom:1px solid var(--line);gap:4px;margin-bottom:18px;display:flex;overflow-x:auto}.tabs button{color:var(--muted);cursor:pointer;white-space:nowrap;background:0 0;border:none;border-bottom:2px solid #0000;padding:10px 14px}.tabs button.active{color:var(--text);border-bottom-color:var(--amber)}.grid-wrap{border:1px solid var(--line);border-radius:10px;max-height:70vh;overflow:auto}table.grid{border-collapse:separate;border-spacing:0;font-size:12px}table.grid th,table.grid td{border-bottom:1px solid var(--line);border-right:1px solid var(--line);padding:0}table.grid thead th{z-index:2;background:var(--panel2);font-family:var(--mono);color:var(--muted);padding:6px 4px;font-weight:500;position:sticky;top:0}table.grid th.lesson-h{color:var(--amber)}table.grid td.name,table.grid th.name{z-index:1;background:var(--panel);text-align:left;white-space:nowrap;min-width:140px;padding:6px 10px;position:sticky;left:0}table.grid thead th.name{z-index:3;background:var(--panel2)}.cell{width:34px;height:30px;color:var(--text);place-items:center;font-size:11px;text-decoration:none;display:grid}.cell.solved{color:#c6f5dd;background:#17402b}.cell.solved.s1{background:#1d3226}.cell.solved.s3{background:#1f5a3b}.cell.tried{color:#ffb4a8;background:#3a1d17}.cell.signed:after{content:"✓";position:absolute}.cell.lessoncell{width:40px;font-weight:700}.kpi{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px;margin-bottom:18px;display:grid}.kpi .card{padding:14px}.kpi .num{font-size:28px;font-weight:600;font-family:var(--mono)}.list{flex-direction:column;display:flex}.list-item{border-bottom:1px solid var(--line);align-items:center;gap:12px;padding:10px 12px;display:flex}.list-item:last-child{border-bottom:none}.verify-big{text-align:center;border-radius:16px;padding:30px 20px}.verify-big.ok{background:var(--green-bg);border:2px solid var(--green)}.verify-big.bad{background:var(--red-bg);border:2px solid var(--red)}.verify-big .mark{font-size:64px;line-height:1}pre.sql{border:1px solid var(--line);font-family:var(--mono);white-space:pre-wrap;color:var(--amber);background:#0b0e12;border-radius:8px;margin:6px 0;padding:10px 12px;font-size:13px}.attempt{border-left:3px solid var(--line2);margin-bottom:8px;padding:6px 10px}.attempt.ok{border-color:var(--green)}.attempt.fail{border-color:var(--red)}.attempt pre{white-space:pre-wrap;font-family:var(--mono);color:var(--text);margin:4px 0;font-size:12px}.split{grid-template-columns:1fr 1fr;gap:16px;display:grid}@media (width<=760px){.split{grid-template-columns:1fr}.topbar{padding:8px 12px}.page{padding:18px 14px 60px}.hide-sm{display:none!important}.admin-nav{flex-wrap:nowrap}.admin-nav a{padding:6px 8px;font-size:13px}.code-big{font-size:32px}.solved-card .qr{width:104px;height:104px}}.print-page{color:#111;min-height:100%;font-family:var(--sans);background:#fff;padding:20px}.print-page table{border-collapse:collapse;width:100%;font-size:12px}.print-page th,.print-page td{text-align:left;border:1px solid #999;padding:4px 6px}.print-page .mono{font-family:var(--mono)}.slips{grid-template-columns:repeat(3,1fr);gap:0;display:grid}.slip{break-inside:avoid;border:1px dashed #999;flex-direction:column;justify-content:space-between;height:150px;padding:14px;display:flex}.slip .code{font-family:var(--mono);letter-spacing:.08em;font-size:26px;font-weight:600}@media print{.no-print{display:none!important}body{background:#fff}}.leader-widget{background:var(--panel);border:1px solid var(--line);color:var(--text);border-radius:12px;flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:18px;padding:12px 16px;text-decoration:none;display:flex}.leader-widget:hover{border-color:var(--amber)}.lw-item{align-items:center;gap:6px;font-size:14px;display:inline-flex}.lw-item.me{color:var(--amber);font-weight:600}.lw-rank{font-family:var(--mono);background:var(--panel3);border-radius:50%;place-items:center;width:22px;height:22px;font-size:12px;display:grid}.seg{border:1px solid var(--line2);border-radius:8px;display:inline-flex;overflow:hidden}.seg button{cursor:pointer;color:var(--muted);background:0 0;border:none;padding:6px 14px}.seg button.on{background:var(--amber);color:var(--amber-ink);font-weight:600}.rank-row{border-bottom:1px solid var(--line);align-items:center;gap:14px;padding:10px 16px;display:flex}.rank-row:last-child{border-bottom:none}.rank-row.me{background:#241b08}.rank-no{font-family:var(--mono);background:var(--panel3);width:34px;height:34px;color:var(--muted);border-radius:50%;flex:none;place-items:center;font-weight:600;display:grid}.rank-row.top1 .rank-no{background:var(--amber);color:var(--amber-ink)}.rank-row.top2 .rank-no{color:#1b1f24;background:#c8ccd2}.rank-row.top3 .rank-no{color:#1f1208;background:#b8794a}.rank-name{font-weight:500}.rank-meta{color:var(--muted);font-size:13px}.rank-stars{font-family:var(--mono);color:var(--amber);text-align:right;min-width:60px;font-weight:600}.rank-table.big .rank-row{padding:14px 24px;font-size:22px}.rank-table.big .rank-no{width:48px;height:48px;font-size:20px}.rank-table.big .rank-meta{font-size:16px}.beamer{min-height:100vh;padding:32px 48px}.beamer h1{font-size:44px}@media (width<=760px){.rank-meta{display:none}}.choice{border:1px solid var(--line2);cursor:pointer;background:var(--panel2);border-radius:8px;align-items:center;gap:10px;padding:10px 12px;display:flex}.choice:hover{border-color:var(--amber)}.choice.on{border-color:var(--amber);background:#241b08}.warmup{background:var(--panel);border:1px dashed var(--amber);border-radius:14px;margin-bottom:18px;padding:14px 16px}.warmup .mission-tile{min-height:70px}.meter{gap:4px;display:flex}.meter span{background:var(--line2);border-radius:4px;width:22px;height:8px}.meter span.on{background:var(--green)}.concepts{grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px;display:grid}.concept-card{background:var(--panel);border:1px solid var(--line);border-radius:12px;flex-direction:column;gap:8px;padding:14px 16px;display:flex}.dd-figure{margin:14px 0 4px}.dd-figure svg{width:100%;height:auto;max-height:460px;font-family:var(--sans);display:block}.dd-figure figcaption{color:#6b5f48;text-align:center;margin-top:6px;font-size:13px}.paper-table{color:var(--paper-ink);width:100%;font-family:var(--mono);background:#fffaf0;border:1px solid #cdbf9e;font-size:13px}.paper-table th{color:var(--paper-ink);background:#efe4cb;border-bottom:1px solid #cdbf9e}.paper-table td,.paper-table th{white-space:nowrap;border-right:1px solid #e4d8bc;padding:5px 9px}.dd-figure:has(.paper-table){overflow-x:auto}.figure-card{padding:14px 16px}.figure-card .dd-figure{margin:0}@media (width<=720px){.dd-figure{overflow-x:auto}.dd-figure svg{min-width:620px}}
