/* ======================================
   SEO TOOL HELPER – Tool UI (Light v4)
   Theme: Clean Gradient Light
   Author: Eva for Vishal
   ====================================== */

/* ---------- Design Tokens ---------- */
:root{
  --bg:#f8fafc;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --border:#e2e8f0;
  --brand:#0ea5e9;
  --brand-2:#0284c7;
  --ring:rgba(14,165,233,.25);
  --shadow:0 6px 20px rgba(2,6,23,.06);
}

/* ---------- Base ---------- */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:Poppins,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:linear-gradient(180deg,#fdfefe 0%, #f8fafc 100%);
  line-height:1.55;
}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* ---------- Container ---------- */
.sth-container{
  max-width:1100px;
  margin:28px auto;
  padding:18px;
  background:transparent;
}

/* ---------- Back Navigation ---------- */
.backnav{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:12px 18px;
  border-radius:14px;
  background:linear-gradient(135deg, #ffffff, #f5fbff);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  margin-bottom:24px;
  position:sticky;
  top:8px;
  z-index:30;
}
.backnav a{
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--text);
  text-decoration:none;
  font-weight:600;
  transition:color .15s ease, transform .1s ease;
}
.backnav a:hover{color:var(--brand);transform:translateY(-1px)}
.backnav .logo-container{font-size:18px;font-weight:700;letter-spacing:-.02em}
.backnav .logo-icon{
  width:34px;height:34px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--brand),var(--brand-2));
  color:#fff;border-radius:10px;box-shadow:0 4px 10px rgba(14,165,233,.25)
}
.backnav .back-button{
  font-size:15px;padding:8px 14px;
  border:1px solid var(--border);
  border-radius:10px;
  background:#fff;
}
.backnav .back-button:hover{
  border-color:var(--brand);
  background:color-mix(in srgb, var(--brand) 6%, #fff);
}

/* ---------- Breadcrumb ---------- */
.sth-breadcrumb{
  display:flex;flex-wrap:wrap;gap:8px;
  font-size:14px;color:var(--muted);margin:0 0 10px;
}
.sth-breadcrumb a{color:inherit;text-decoration:none}
.sth-breadcrumb a:hover{color:var(--brand)}

/* ---------- Hero ---------- */
.sth-hero h1{
  margin:8px 0 4px;
  font-size:clamp(22px,3.2vw,36px);
  letter-spacing:-.02em;
}
.sth-hero p{color:var(--muted);margin:6px 0 18px}



/* ---------- Card ---------- */
.sth-card{
  background:#fff;
  border:1px solid var(--border);
  border-radius:16px;
  padding:18px;
  box-shadow:var(--shadow);
}

/* ---------- Dropzone ---------- */
.sth-drop{
  border:2px dashed var(--border);
  border-radius:14px;
  padding:26px;
  text-align:center;
  background:#fafcff;
  transition:border-color .2s ease, background .2s ease, transform .1s ease;
}
.sth-drop:hover,.sth-drop.dragover{
  border-color:var(--brand);
  background:color-mix(in srgb, var(--brand) 4%, #fafcff);
  transform:translateY(-1px);
}
.sth-filelabel{color:var(--muted);margin-top:6px;font-size:13px}

/* ---------- Form Inputs ---------- */
.sth-input,.sth-field,.sth-select{
  width:100%;
  border:1px solid var(--border);
  border-radius:12px;
  padding:12px;
  background:#fff;
  color:var(--text);
  font-size:15px;
  transition:border-color .15s ease, box-shadow .15s ease;
}
.sth-input:focus,.sth-field:focus,.sth-select:focus{
  border-color:var(--brand);
  box-shadow:0 0 0 6px var(--ring);
  outline:none;
}

/* ---------- Grid ---------- */
.sth-grid-2{
  display:grid;
  grid-template-columns:1fr;
  gap:12px;
  margin-top:12px;
}
@media(min-width:768px){
  .sth-grid-2{grid-template-columns:1fr 1fr;gap:16px}
}

/* ---------- Radios ---------- */
.sth-radios{display:flex;flex-wrap:wrap;gap:10px;margin-top:8px}
.sth-radios label{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 12px;border:1px solid var(--border);
  border-radius:999px;background:#fff;
  cursor:pointer;transition:border-color .15s ease, transform .08s ease;
}
.sth-radios input{appearance:none;width:16px;height:16px;border-radius:50%;border:2px solid var(--muted)}
.sth-radios input:checked{border-color:var(--brand);box-shadow:inset 0 0 0 4px var(--brand)}
.sth-radios label:hover{border-color:var(--brand);transform:translateY(-1px)}

/* ---------- Buttons ---------- */
.sth-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.sth-btn{
  border:1px solid var(--border);
  background:#fff;
  color:var(--text);
  padding:10px 16px;
  border-radius:12px;
  cursor:pointer;
  font-weight:600;
  transition:transform .08s ease, box-shadow .15s ease, border-color .15s ease;
}
.sth-btn:hover{border-color:var(--brand);transform:translateY(-1px)}
.sth-btn.primary{
  background:linear-gradient(180deg,var(--brand),var(--brand-2));
  border-color:transparent;
  color:#fff;
  box-shadow:0 6px 20px rgba(14,165,233,.3);
}

/* ---------- Preview ---------- */
.sth-preview{margin-top:22px}
.sth-pages{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
  gap:14px;
}
.sth-pages canvas,.sth-pages img{
  width:100%;height:auto;
  border:1px solid var(--border);
  border-radius:12px;
  background:#fff;
  box-shadow:var(--shadow);
  aspect-ratio:3/4;
  object-fit:cover;
  transition:transform .12s ease,border-color .12s ease;
}
.sth-pages canvas:hover,.sth-pages img:hover{
  transform:translateY(-2px);
  border-color:var(--brand);
}

/* ---------- Info ---------- */
.sth-info{margin-top:22px;color:var(--muted);font-size:14px}

/* Force hide the default browser file input (WordPress safe) */
#sthFile[hidden],
input[type="file"][hidden],
input[type="file"]#sthFile {
  display: none !important;
}

/* Add top spacing above Upload & Process button */
#sthProcess {
  margin-top: 20px !important;
}


/* ---------- Mobile Tweaks ---------- */
@media(max-width:520px){
  .sth-card,.sth-drop{padding:16px}
  .sth-btn{flex:1 1 100%;text-align:center}
}

/* ---------- Reduced Motion ---------- */
@media(prefers-reduced-motion:reduce){*{transition:none !important;animation:none !important}}