:root{
  --bg:#0b0d10; --card:#12161c; --text:#eef2f7; --muted:#9aa4b2;
  --border:#202734; --btn:#2b6cff; --btn2:#1f2733;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font:14px/1.4 system-ui,-apple-system,Segoe UI,Roboto}
.container{max-width:920px;margin:0 auto;padding:18px}
.header{margin-bottom:14px}
.header.row{display:flex;align-items:flex-start;justify-content:space-between;gap:12px}
h1{margin:0 0 6px;font-size:22px}
h2{margin:0 0 10px;font-size:16px}
.muted{color:var(--muted)}
.footer{margin-top:18px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;padding:14px;margin-bottom:14px}
.grid2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
@media (max-width:700px){ .grid2{grid-template-columns:1fr} }

.btn{
  background:var(--btn);border:0;color:white;border-radius:12px;padding:10px 14px;
  cursor:pointer;font-weight:700
}
.btn.big{padding:18px 14px;font-size:16px}
.btn:active{transform:translateY(1px)}
.link{color:#cfe0ff;text-decoration:none}
.link:hover{text-decoration:underline}

.form{display:grid;gap:12px}
.field{display:grid;gap:6px}
.field.row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
label{font-weight:650}
input[type="text"], input[type="file"]{
  width:100%;padding:10px 12px;border-radius:12px;border:1px solid var(--border);
  background:#0e1218;color:var(--text)
}
input[type="color"]{width:54px;height:40px;padding:0;border-radius:12px;border:1px solid var(--border);background:#0e1218}
.hint{margin:0;color:var(--muted);font-size:12px}
.checkbox{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:600}

.previewWrap,.resultWrap{
  width:100%;overflow:hidden;border-radius:14px;border:1px solid var(--border);background:#0e1218;
  display:flex;align-items:center;justify-content:center
}
.previewWrap canvas{max-width:100%;height:auto}
.resultWrap img{max-width:100%;height:auto;display:block}

.row.space{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-top:12px}


/* -----------------------
   TABLET & DESKTOP
----------------------- */
@media (min-width: 768px) {

  .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    align-items: start;
  }

  .header {
    grid-column: 1 / -1; /* full width */
  }

  .card {
    margin-bottom: 0;
  }

  /* Make preview sticky for better UX */
  .previewWrap {
    position: sticky;
    top: 20px;
  }
}

/* -----------------------
   LARGE DESKTOP (optional refinement)
----------------------- */
@media (min-width: 1200px) {

  .container {
    grid-template-columns: 1.1fr 0.9fr;
  }
}