.stai-wrap{
max-width:1240px;
margin:42px auto;
padding:0 18px;
font-family:Arial,Helvetica,sans-serif;
color:#101828;
}

.stai-hero{
position:relative;
overflow:hidden;
text-align:center;
padding:52px 22px;
border-radius:32px;
background:
radial-gradient(circle at top left,rgba(248,132,82,.32),transparent 34%),
linear-gradient(135deg,#111827,#1f2937 52%,#f88452);
color:#fff;
margin-bottom:24px;
box-shadow:0 22px 60px rgba(16,24,40,.18);
}

.stai-hero h1{
font-size:50px;
line-height:1.08;
margin:0 0 12px;
font-weight:900;
letter-spacing:-.04em;
}

.stai-hero p{
max-width:850px;
margin:0 auto;
font-size:17px;
line-height:1.7;
color:rgba(255,255,255,.88);
}

.stai-tags,.stai-keywords{
display:flex;
flex-wrap:wrap;
justify-content:center;
gap:10px;
margin-top:20px;
}

.stai-tags span{
background:rgba(255,255,255,.13);
border:1px solid rgba(255,255,255,.18);
backdrop-filter:blur(8px);
padding:9px 14px;
border-radius:999px;
font-size:13px;
font-weight:900;
}

.stai-card{
background:#fff;
border-radius:28px;
padding:24px;
box-shadow:0 18px 50px rgba(16,24,40,.08);
}

.stai-upload input{
display:none;
}

.stai-upload-box{
background:linear-gradient(135deg,#fff7f2,#fff);
border-radius:24px;
padding:34px;
text-align:center;
cursor:pointer;
margin-bottom:18px;
box-shadow:inset 0 0 0 1px rgba(248,132,82,.12);
}

.stai-upload-icon{
font-size:42px;
color:#f88452;
margin-bottom:8px;
}

.stai-upload-box strong{
display:block;
font-size:28px;
margin-bottom:8px;
}

.stai-upload-box span{
color:#667085;
}

.stai-status{
background:#f88452;
color:#fff;
padding:16px 18px;
border-radius:18px;
font-weight:900;
margin-bottom:22px;
}

.stai-layout{
display:grid;
grid-template-columns:minmax(0,1fr) 360px;
gap:22px;
align-items:start;
}

.stai-main,.stai-side{
display:grid;
gap:20px;
}

.stai-side{
position:sticky;
top:20px;
}

.stai-preview-card,.stai-section,.stai-note,.stai-seo{
background:#fff;
border-radius:24px;
padding:20px;
box-shadow:0 10px 28px rgba(16,24,40,.05);
}

.stai-preview-card img{
width:100%;
max-height:460px;
object-fit:contain;
background:#f8fafc;
border-radius:18px;
}

.stai-file-info{
padding-top:14px;
}

.stai-file-info strong{
display:block;
font-size:18px;
margin-bottom:4px;
}

.stai-file-info span{
color:#667085;
}

.stai-section h2,.stai-note h2,.stai-seo h2{
font-size:22px;
letter-spacing:-.03em;
margin:0 0 15px;
}

.stai-score-wrap{
display:grid;
grid-template-columns:160px 1fr;
gap:20px;
align-items:center;
}

.stai-score-ring{
width:150px;
height:150px;
border-radius:50%;
display:flex;
flex-direction:column;
align-items:center;
justify-content:center;
background:conic-gradient(#f88452 0%,#f2f4f7 0);
box-shadow:inset 0 0 0 12px #fff,0 10px 28px rgba(16,24,40,.08);
}

.stai-score-ring strong{
font-size:34px;
font-weight:900;
}

.stai-score-ring span{
font-size:12px;
font-weight:800;
color:#667085;
}

.stai-result-text h3{
font-size:24px;
margin:0 0 8px;
}

.stai-result-text p{
margin:0;
line-height:1.7;
color:#667085;
}

.stai-checks{
display:grid;
grid-template-columns:1fr 1fr;
gap:12px;
}

.stai-check{
padding:14px;
border-radius:16px;
font-size:13px;
font-weight:800;
line-height:1.55;
}

.stai-good{
background:#f0fdf4;
color:#166534;
}

.stai-warn{
background:#fffbeb;
color:#92400e;
}

.stai-danger{
background:#fef2f2;
color:#991b1b;
}

.stai-source{
background:#fff7f2;
color:#9a3412;
border-radius:18px;
padding:18px;
font-weight:900;
line-height:1.6;
}

.stai-grid{
display:grid;
gap:10px;
}

.stai-row{
display:grid;
grid-template-columns:110px 1fr;
gap:10px;
background:#f8fafc;
border-radius:15px;
padding:12px;
}

.stai-row strong{
font-size:13px;
color:#344054;
}

.stai-row span{
font-size:13px;
color:#475467;
word-break:break-word;
line-height:1.55;
}

.stai-actions{
display:grid;
gap:10px;
}

.stai-btn{
border:none;
background:#f88452;
color:#fff;
padding:13px 16px;
border-radius:15px;
font-weight:900;
cursor:pointer;
}

.stai-soft{
background:#f8fafc;
color:#344054;
}

.stai-note{
background:#f88452;
color:#fff;
}

.stai-note h2{
color:#fff;
}

.stai-note p{
margin:0;
line-height:1.8;
}

.stai-seo{
margin-top:24px;
}

.stai-seo p{
color:#475467;
line-height:1.8;
}

.stai-keywords span{
background:#fff7f2;
color:#c2410c;
padding:9px 14px;
border-radius:999px;
font-size:13px;
font-weight:900;
}

@media(max-width:980px){
.stai-layout{
grid-template-columns:1fr;
}
.stai-side{
position:relative;
top:auto;
}
}

@media(max-width:760px){
.stai-hero h1{
font-size:38px;
}
.stai-score-wrap,.stai-checks{
grid-template-columns:1fr;
}
.stai-score-ring{
margin:auto;
}
.stai-row{
grid-template-columns:1fr;
}
}