:root{--text:#1d1d1f;--secondary:#6e6e73;--tertiary:#86868b;--blue:#0071e3;--blue-hover:#0077ed;--blue-soft:#eaf3fc;--surface:#fff;--page:#f5f5f7;--line:#d2d2d7;--green:#248a3d;--green-soft:#eef8f0;--amber:#9a6700;--amber-soft:#fff8e6;--red:#d70015;--red-soft:#fff0f1}
.requirement-grid .requirement-row.cautious .pass-icon{background:var(--amber-soft);color:var(--amber)}.requirement-grid .requirement-row.cautious>b{color:var(--amber)}.requirement-grid .requirement-row.failed .pass-icon{background:var(--red-soft);color:var(--red)}.requirement-grid .requirement-row.failed>b{color:var(--red)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--text);background:var(--page);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Helvetica Neue",Arial,sans-serif;-webkit-font-smoothing:antialiased}button,input,textarea{font:inherit}button{cursor:pointer}.hidden{display:none!important}
.site-header{position:sticky;top:0;z-index:20;height:64px;padding:0 max(24px,calc((100vw - 1080px)/2));display:flex;align-items:center;justify-content:space-between;background:rgba(250,250,252,.82);border-bottom:1px solid rgba(0,0,0,.08);backdrop-filter:saturate(180%) blur(20px)}.brand{display:flex;align-items:center;gap:11px;color:var(--text);text-decoration:none}.brand-mark{width:34px;height:34px;border-radius:9px;background:var(--text);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:700}.brand strong,.brand small{display:block}.brand strong{font-size:14px;line-height:1.15}.brand small{margin-top:3px;color:var(--secondary);font-size:10px}.demo-chip{padding:6px 11px;border-radius:999px;background:#e8e8ed;color:var(--secondary);font-size:10px;font-weight:600}
.hero{max-width:920px;margin:0 auto;padding:96px 24px 116px;text-align:center}.eyebrow{color:var(--blue);font-size:11px;letter-spacing:.12em;font-weight:700}.hero h1{margin:22px 0;font-size:clamp(48px,7.2vw,78px);font-weight:700;line-height:1.02;letter-spacing:-.055em}.hero h1 em{color:var(--blue);font-style:normal}.hero>p{max-width:680px;margin:0 auto;color:var(--secondary);font-size:19px;line-height:1.55;letter-spacing:-.01em}.principles{display:flex;justify-content:center;align-items:center;gap:13px;margin-top:31px;color:var(--tertiary);font-size:12px}.principles i{width:3px;height:3px;border-radius:50%;background:#a1a1a6}
.checker-shell{padding:0 24px 90px}.checker-card{max-width:980px;margin:0 auto;background:var(--surface);border-radius:28px;padding:46px 52px 50px;box-shadow:0 18px 55px rgba(0,0,0,.07)}.card-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:35px}.card-heading>div{display:flex;align-items:center;gap:12px}.section-number{width:27px;height:27px;border-radius:50%;display:inline-grid;place-items:center;background:var(--blue-soft);color:var(--blue);font-size:10px;font-weight:700}h2{margin:0;font-size:25px;line-height:1.15;letter-spacing:-.025em}.text-button{border:0;border-radius:999px;background:#f0f0f2;color:var(--blue);padding:9px 13px;font-size:11px;font-weight:600}.text-button:hover{background:#e8e8ed}
.field-label{display:block;margin-bottom:9px;font-size:12px;font-weight:650}.field-label span,.field-label b{margin-left:5px;color:var(--tertiary);font-size:10px;font-weight:500}.url-row{position:relative}.url-note{position:absolute;right:14px;top:50%;transform:translateY(-50%);color:var(--tertiary);font-size:9px;letter-spacing:.05em;text-transform:uppercase}input,textarea{width:100%;border:1px solid #d6d6db;border-radius:13px;background:#fbfbfd;color:var(--text);outline:none;transition:border-color .18s,box-shadow .18s,background .18s}input{padding:13px 14px}.url-row input{padding-right:165px}textarea{padding:14px;line-height:1.55;resize:vertical}input:focus,textarea:focus{border-color:var(--blue);background:#fff;box-shadow:0 0 0 4px rgba(0,113,227,.1)}.help{margin:8px 0 27px;color:var(--tertiary);font-size:10px;line-height:1.5}.label-row{display:flex;align-items:center;justify-content:space-between}.label-row>span{color:var(--tertiary);font-size:10px}.article-input{min-height:220px}
fieldset{border:0;border-top:1px solid #e6e6e9;padding:34px 0 0;margin:38px 0 0}legend{display:flex;align-items:flex-start;gap:12px;width:100%;padding:0;margin:0 0 20px}legend strong,legend small{display:block}legend strong{font-size:17px;letter-spacing:-.015em}legend small{margin-top:5px;color:var(--secondary);font-size:10px;line-height:1.45}.precheck-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}.precheck-field{display:block;padding:18px;border-radius:18px;background:var(--page)}.precheck-field>span,.precheck-field>small{display:block}.precheck-field>span{font-size:11px;font-weight:650}.precheck-field>small{margin:5px 0 10px;color:var(--tertiary);font-size:9px;line-height:1.45}.precheck-field textarea{min-height:84px}.evidence-precheck{grid-column:1/-1}.evidence-precheck .sub-label{margin-top:14px;color:var(--blue);font-size:9px}
.concept-checks{display:flex;flex-wrap:wrap;gap:9px}.concept-check{position:relative;display:flex;align-items:center;padding:9px 13px;border:1px solid #d6d6db;border-radius:999px;background:#fff;color:var(--secondary);font-size:11px;font-weight:600;cursor:pointer;transition:.16s}.concept-check input{position:absolute;opacity:0;pointer-events:none}.concept-check:hover{border-color:#a8a8ad}.concept-check:has(input:checked){border-color:var(--blue);background:var(--blue-soft);color:var(--blue)}.concept-check.none-option{border-style:dashed}.checks{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.check-item{position:relative;display:flex;align-items:center;gap:11px;min-height:76px;padding:15px;border:1px solid #dedee2;border-radius:16px;background:#fff;cursor:pointer;transition:.16s}.check-item:hover{border-color:#b8b8bd}.check-item input{position:absolute;opacity:0}.custom-check{flex:0 0 23px;height:23px;border:1px solid #b8b8bd;border-radius:50%;color:transparent;display:grid;place-items:center;font-size:11px}.check-item input:checked+.custom-check{border-color:var(--blue);background:var(--blue);color:#fff}.check-item strong,.check-item small{display:block}.check-item strong{font-size:11px}.check-item small{margin-top:4px;color:var(--tertiary);font-size:9px;line-height:1.35}
.primary-button{width:100%;margin-top:38px;border:0;border-radius:14px;background:var(--blue);color:#fff;padding:16px 20px;display:flex;justify-content:center;gap:14px;font-weight:650;transition:.18s}.primary-button:not(:disabled):hover{background:var(--blue-hover);transform:translateY(-1px)}.primary-button:disabled{background:#c7c7cc;cursor:not-allowed}.arrow{font-size:19px;line-height:16px}.button-hint{text-align:center;color:var(--tertiary);font-size:9px;line-height:1.45;margin:9px 0 -16px}.error-message{margin:14px 0 0;padding:13px 15px;border-radius:12px;color:#a3000f;background:var(--red-soft);font-size:11px}
.loading-panel{max-width:720px;margin:80px auto;text-align:center;padding:60px 24px}.loader{display:flex;justify-content:center;gap:7px;margin-bottom:22px}.loader span{width:8px;height:8px;border-radius:50%;background:var(--blue);animation:pulse 1s infinite alternate}.loader span:nth-child(2){animation-delay:.2s}.loader span:nth-child(3){animation-delay:.4s}@keyframes pulse{to{transform:translateY(-8px);opacity:.25}}.loading-panel h2{margin-bottom:10px}.loading-panel p{color:var(--secondary);font-size:13px}
.report{max-width:980px;margin:90px auto;padding:0 24px}.report-kicker{margin:0 0 14px;color:var(--tertiary);font-size:10px;font-weight:700;letter-spacing:.12em}.report-section{margin-top:18px;border-radius:24px;background:#fff;overflow:hidden;box-shadow:0 4px 24px rgba(0,0,0,.04)}.report-section>header{display:flex;align-items:center;gap:14px;padding:25px 30px;border-bottom:1px solid #e8e8ed}.report-section>header>span{width:25px;height:25px;border-radius:50%;display:grid;place-items:center;background:#f0f0f2;color:var(--secondary);font-size:9px;font-weight:700}.report-section>header h2{font-size:20px}.report-section>header p{margin:4px 0 0;color:var(--tertiary);font-size:10px}.report-content{padding:28px 30px 32px}
.precheck-results{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.precheck-result{padding:17px;border-radius:16px;background:var(--page)}.precheck-result.good{background:var(--green-soft)}.precheck-result.caution{background:var(--amber-soft)}.precheck-result.weak{background:var(--red-soft)}.precheck-result small,.precheck-result strong{display:block}.precheck-result small{color:var(--tertiary);font-size:8px;letter-spacing:.07em;text-transform:uppercase}.precheck-result strong{margin-top:8px;font-size:17px;letter-spacing:-.02em}.precheck-result p{margin:8px 0 0;color:var(--secondary);font-size:10px;line-height:1.55}.precheck-note{margin:13px 0 0;color:var(--tertiary);font-size:9px;line-height:1.5}.requirement-grid{display:grid;grid-template-columns:1fr 1fr;column-gap:28px}.requirement-row{min-height:72px;display:grid;grid-template-columns:25px 1fr auto;align-items:center;gap:10px;border-bottom:1px solid #ececef}.pass-icon{width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:var(--green-soft);color:var(--green);font-size:10px;font-weight:800}.requirement-row strong,.requirement-row small{display:block}.requirement-row strong{font-size:11px}.requirement-row small{margin-top:4px;color:var(--tertiary);font-size:9px;line-height:1.35}.requirement-row>b{color:var(--green);font-size:10px;text-align:right}
.context-intro small{color:var(--blue);font-size:8px;letter-spacing:.1em;font-weight:700}.context-intro h3{margin:6px 0 0;font-size:25px;letter-spacing:-.025em}
.context-intro{display:flex;align-items:center;justify-content:space-between;padding:22px 24px;border-radius:18px;background:#f5f5f7}.context-intro p{margin:0;color:var(--secondary);font-size:10px}.grounding-rule{display:grid;grid-template-columns:180px 1fr;gap:16px;margin:13px 0 18px;padding:14px 16px;border-radius:13px;background:var(--blue-soft);font-size:10px;line-height:1.5}.grounding-rule strong{color:var(--blue)}.opportunities{display:grid;gap:12px}.opportunity{display:grid;grid-template-columns:42px minmax(0,1.25fr) minmax(0,1fr);grid-template-rows:auto auto;border:1px solid #e1e1e5;border-radius:18px;overflow:hidden;background:#fff}.opportunity>div{padding:19px}.opportunity-index{grid-row:1/3;display:flex;justify-content:center;color:var(--tertiary);background:#f7f7f9;font-size:9px;font-weight:700}.evidence{grid-row:1/3;border-right:1px solid #e8e8ed}.evidence>span{color:var(--blue);font-size:8px;font-weight:700;letter-spacing:.1em;text-transform:uppercase}blockquote{margin:10px 0 8px;font-size:16px;font-weight:650;line-height:1.38;letter-spacing:-.012em}.evidence p,.relevance p{margin:0;color:var(--secondary);font-size:10px;line-height:1.55}.relevance{border-bottom:1px solid #e8e8ed}.relevance small,.potential small{display:block;margin-bottom:8px;color:var(--tertiary);font-size:8px;letter-spacing:.1em;font-weight:700}.potential strong{display:block;font-size:11px;line-height:1.45}.potential span{display:inline-block;margin-top:10px;padding:5px 8px;border-radius:999px;background:var(--green-soft);color:var(--green);font-size:8px;font-weight:700;text-transform:uppercase}.evidence-rule{margin:14px 0 0;padding:0 2px;color:var(--tertiary);font-size:9px;line-height:1.5}.evidence-rule b{color:var(--secondary)}
.context-skipped{padding:25px;border-radius:16px;background:#f5f5f7}.context-skipped>span{color:var(--tertiary);font-size:8px;font-weight:700;letter-spacing:.1em}.context-skipped h3{margin:8px 0 9px;font-size:20px;letter-spacing:-.02em}.context-skipped p,.empty-context p{margin:0;color:var(--secondary);font-size:11px;line-height:1.6}.empty-context{padding:24px;border-radius:16px;background:#f5f5f7}.concept-card{display:grid;grid-template-columns:.8fr 1.35fr 1fr;border-radius:18px;overflow:hidden;background:var(--blue-soft)}.concept-card>div{padding:24px;border-right:1px solid rgba(0,113,227,.12)}.concept-card>div:last-child{border:0}.concept-card small{display:block;margin-bottom:10px;color:var(--blue);font-size:8px;letter-spacing:.1em;font-weight:700}.concept-name{display:flex;flex-direction:column;justify-content:center}.concept-name h3{margin:0;font-size:27px;letter-spacing:-.03em}.concept-evidence blockquote{margin:0 0 10px}.concept-evidence p,.concept-guidance p{margin:0;color:#49627a;font-size:11px;line-height:1.65}.concept-guidance{background:rgba(255,255,255,.4)}
.teacher-verdict{padding:26px 28px;display:grid;grid-template-columns:250px 1fr;gap:26px;align-items:center;border-radius:18px;background:var(--green-soft)}.teacher-verdict.caution{background:var(--amber-soft)}.teacher-verdict.not-recommended{background:var(--red-soft)}.teacher-verdict small{color:var(--secondary);font-size:8px;letter-spacing:.1em;font-weight:700}.teacher-verdict h3{margin:6px 0 0;font-size:26px;letter-spacing:-.025em}.teacher-verdict p{margin:0;color:var(--secondary);font-size:12px;line-height:1.65}.teacher-card{position:relative;margin-top:12px;padding:25px 28px 25px 55px;border-radius:18px;background:#f5f5f7}.teacher-card>span{position:absolute;left:22px;top:15px;color:var(--blue);font-size:38px;font-weight:600}.teacher-card p{margin:0;color:#3a3a3c;font-size:15px;line-height:1.65}.secondary-button{display:block;margin:26px auto 0;padding:11px 16px;border:0;border-radius:999px;background:#e8e8ed;color:var(--text);font-size:11px;font-weight:600}
footer{max-width:980px;margin:70px auto 0;padding:28px 24px 40px;border-top:1px solid #d8d8dc;display:flex;justify-content:space-between;align-items:center;gap:24px;color:var(--secondary)}footer p{margin:0;font-size:11px;font-weight:600}footer span{max-width:430px;text-align:right;font-size:9px;line-height:1.5}
@media(max-width:760px){.site-header{height:58px;padding:0 16px}.demo-chip{display:none}.brand small{display:none}.hero{padding:70px 20px 82px}.hero h1{font-size:48px}.hero>p{font-size:16px}.checker-shell{padding:0 14px 65px}.checker-card{padding:30px 20px 34px;border-radius:22px}.card-heading{display:block}.text-button{margin-top:15px}.url-note{display:none}.url-row input{padding-right:14px}.precheck-grid,.checks,.precheck-results,.requirement-grid,.teacher-verdict{grid-template-columns:1fr}.evidence-precheck{grid-column:auto}.checks{gap:8px}.report{margin:65px auto;padding:0 14px}.report-section{border-radius:20px}.report-section>header{padding:20px}.report-content{padding:20px}.grounding-rule{grid-template-columns:1fr;gap:7px}.opportunity{grid-template-columns:34px 1fr;grid-template-rows:auto auto auto}.opportunity-index{grid-row:1/4}.evidence{grid-row:auto;border-right:0;border-bottom:1px solid #e8e8ed}.relevance{border-bottom:1px solid #e8e8ed}.opportunity>div{padding:16px}.concept-card{grid-template-columns:1fr}.concept-card>div{border-right:0;border-bottom:1px solid rgba(0,113,227,.12)}footer{display:block;margin-top:45px}footer span{display:block;margin-top:10px;text-align:left}}