:root{color-scheme:light;--bg:#f5f7fb;--ink:#172033;--muted:#64718a;--line:#e1e7f1;--blue:#2f6fed;--blue-light:#edf3ff;--green:#16754b;--red:#b63247;--radius:22px;font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}body{margin:0;padding:52px 20px 24px;background:radial-gradient(ellipse at 50% 0, #e6eeff 0,transparent 550px)}main{max-width:1000px;margin:auto}.hero{margin:0 0 32px;text-align:center}.semester{display:inline-flex;gap:12px;align-items:center;color:#315eaa;font-size:11px;letter-spacing:.12em;font-weight:800}.semester span{color:#9bb2da}.hero h1{font-size:clamp(26px,4.6vw,38px);letter-spacing:-.055em;line-height:1.3;margin:14px 0 10px;word-break:keep-all}.hero p{font-size:14px;line-height:1.6;color:var(--muted);margin:0}.hero strong{font-weight:600;color:#445372}.calculator{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line);background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 14px 46px #2538590b}.input-panel,.output-panel{padding:30px;min-width:0}.output-panel{background:#fafbfe;border-left:1px solid var(--line)}.section-label{display:flex;align-items:center;gap:9px;margin-bottom:26px}.step{display:grid;place-items:center;width:25px;height:25px;border-radius:8px;background:#edf2fb;color:#60779b;font-size:11px;font-weight:800}.section-label h2{font-size:15px;font-weight:750;margin:0}.field{margin-bottom:20px}label{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:700;gap:8px;margin-bottom:9px}label>span{font-weight:400;color:var(--muted);font-size:11px}select,input{font:inherit;width:100%;height:48px;border:1px solid #d4ddeb;border-radius:11px;background:white;color:var(--ink);outline:none;transition:border-color .15s,box-shadow .15s}select{padding:0 12px;font-size:15px}input{padding:0 42px 0 13px;font-variant-numeric:tabular-nums;font-size:18px}select:focus,input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2f6fed1c}.ratio-box{display:flex;flex-wrap:wrap;gap:8px 15px;font-size:12px;color:#2b579d;padding:12px 14px;background:var(--blue-light);border-radius:10px;margin:-8px 0 23px;line-height:1.7}.ratio-box strong{font-weight:750}.ratio-box .no-final{color:#64718a}.score-fields{display:grid;grid-template-columns:1fr 1fr;gap:16px}.score-fields .field{margin-bottom:12px}.number-field{position:relative}.number-field>span{position:absolute;right:13px;top:15px;font-size:13px;color:var(--muted);pointer-events:none}input::-webkit-inner-spin-button,input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}input[type=number]{-moz-appearance:textfield;appearance:textfield}.range{font-size:11px;color:var(--muted);margin:7px 0 0;line-height:1.5}.input-note{font-size:12px;line-height:1.8;color:var(--muted);margin:0;padding-top:9px}.input-note strong{font-weight:600;color:#485975}.result{min-height:258px;border:1px solid #dbe6fc;background:#f0f5ff;border-radius:16px;padding:25px 23px}.result-label{margin:0;font-size:12px;color:#3c5e96;font-weight:700}.result-value{font-size:44px;letter-spacing:-.055em;line-height:1.2;font-weight:800;color:#245bc8;margin:15px 0 16px;overflow-wrap:anywhere;font-variant-numeric:tabular-nums}.result-value small{font-size:16px;font-weight:650;letter-spacing:-.02em}.result-value.text{font-size:27px;line-height:1.35}.result-description{font-size:13px;color:#415575;line-height:1.8;margin:0;word-break:keep-all}.result-description strong{color:inherit}.result-detail{margin-top:19px;border-top:1px solid #cddbf1;padding-top:15px;display:flex;justify-content:space-between;gap:12px;font-size:12px;line-height:1.6;color:#5b6d88}.result-detail strong{color:#344c70;white-space:nowrap}.result.good{background:#eef8f3;border-color:#cfe7dc}.good .result-label,.good .result-value{color:var(--green)}.good .result-detail{border-color:#cfe7dc}.result.bad{background:#fff3f4;border-color:#f0d8dd}.bad .result-label,.bad .result-value{color:var(--red)}.bad .result-detail{border-color:#efd4d9}.result.empty{background:#f4f6fa;border-color:var(--line)}.empty .result-value{color:#66758f}.formula{margin-top:18px;color:var(--muted);font-size:12px;line-height:1.8}.formula summary{cursor:pointer;width:fit-content;font-weight:600;color:#4b5e7c;min-height:30px}.formula summary:focus-visible{outline:2px solid var(--blue);outline-offset:4px}.formula p{margin:8px 0}.formula code{font-family:inherit;font-size:12px;display:block;background:#edf1f7;padding:10px;border-radius:8px;color:#455a7c}.grade-guide{border:1px solid var(--line);border-radius:18px;background:#ffffffa8;margin-top:22px;padding:20px 25px}.grade-heading{display:flex;justify-content:space-between;gap:8px;align-items:center}.grade-heading h2{font-size:13px;margin:0}.grade-heading>span{font-size:11px;color:var(--muted)}.grade-list{list-style:none;display:grid;grid-template-columns:repeat(6,1fr);margin:17px 0 13px;padding:0;gap:8px}.grade-list li{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:7px;padding:10px 5px;border-radius:9px;font-size:12px;color:#5d6d87;background:#f0f3f8;border:1px solid transparent}.grade-list b{font-size:14px}.grade-list li.active{background:#eaf1ff;border-color:#c9d9fc;color:#285fbd}.grade-note{font-size:11px;color:var(--muted);margin:0;line-height:1.7}footer{text-align:center;font-size:11px;line-height:1.8;color:#7a879a;margin-top:23px}
@media(max-width:720px){body{padding:30px 16px 24px}.hero{margin-bottom:24px}.hero p{font-size:13px}.calculator{grid-template-columns:1fr}.input-panel,.output-panel{padding:23px}.output-panel{border-left:0;border-top:1px solid var(--line)}.section-label{margin-bottom:21px}.result{min-height:0;padding:23px}.grade-guide{padding:19px}.grade-list{grid-template-columns:repeat(3,1fr)}.result-value{font-size:41px}}
@media(max-width:360px){body{padding-inline:12px}.input-panel,.output-panel{padding:19px}.score-fields{gap:10px}label{font-size:12px}.hero h1{font-size:25px}.result-value{font-size:36px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}