:root{
  --indigo: #3E4095;
  --indigo-dark: #2A2C6B;
  --magenta: #B64F87;
  --bg: #F4F4F8;
  --card: #FFFFFF;
  --border: #E3E3EC;
  --text: #23233A;
  --muted: #6C6C82;
  --radius: 14px;
}

*{ box-sizing: border-box; }

body{
  margin:0;
  font-family: 'Poppins', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.topbar{
  background: linear-gradient(100deg, var(--indigo-dark), var(--indigo) 55%, var(--magenta));
  color:#fff;
  padding: 32px 20px 40px;
  text-align:center;
}
.topbar h1{ margin:0 0 6px; font-size: 26px; font-weight:600; }
.topbar p{ margin:0; opacity:.85; font-size:14px; }
.topbar-mark{ height:36px; margin-bottom:10px; }

.wrap{
  max-width: 980px;
  margin: -24px auto 40px;
  padding: 0 16px;
  display:flex;
  flex-direction:column;
  gap:18px;
}

.panel{
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 6px 24px rgba(30,20,70,.08);
  padding: 22px 24px;
}

.panel h2{
  font-size:17px;
  margin: 0 0 16px;
  display:flex;
  align-items:center;
  gap:10px;
}

.stepnum{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:26px; height:26px;
  border-radius:50%;
  background: var(--indigo);
  color:#fff;
  font-size:13px;
  font-weight:700;
}

.template-grid{
  display:grid;
  grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap:12px;
}

.tpl-card{
  border: 2px solid var(--border);
  border-radius: 10px;
  overflow:hidden;
  cursor:pointer;
  background:#000;
  position:relative;
  transition: border-color .15s, transform .1s;
}
.tpl-card:hover{ transform: translateY(-2px); }
.tpl-card.active{ border-color: var(--magenta); box-shadow: 0 0 0 3px rgba(182,79,135,.18); }
.tpl-card img{ display:block; width:100%; aspect-ratio: 1774/887; object-fit: cover; }
.tpl-card .tpl-label{
  position:absolute; bottom:0; left:0; right:0;
  background: linear-gradient(transparent, rgba(0,0,0,.65));
  color:#fff; font-size:12px; padding:16px 8px 6px;
  text-align:center;
}

.form-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:16px;
}
.form-grid label{
  display:flex; flex-direction:column;
  font-size:13px; font-weight:500; color:var(--muted);
  gap:6px;
}
.form-grid input{
  font-family:inherit;
  font-size:14px;
  padding:10px 12px;
  border-radius:8px;
  border:1px solid var(--border);
  color: var(--text);
}
.form-grid input:focus{
  outline:none; border-color: var(--indigo);
}

.photo-row{
  display:flex;
  align-items:center;
  gap:14px;
  flex-wrap:wrap;
}
.upload-btn{
  background: var(--indigo);
  color:#fff;
  font-size:14px;
  padding:10px 18px;
  border-radius:8px;
  cursor:pointer;
  font-weight:500;
}
.upload-btn input{ display:none; }
.ghost-btn{
  background:transparent;
  border:1px solid var(--border);
  color: var(--muted);
  padding:9px 16px;
  border-radius:8px;
  font-family:inherit;
  font-size:13px;
  cursor:pointer;
}
.hint{ font-size:12px; color:var(--muted); }

.preview-panel{ text-align:center; }
.canvas-wrap{
  width:100%;
  overflow:hidden;
  border-radius:10px;
  border:1px solid var(--border);
  margin-bottom:16px;
  background:#eee;
}
#sigCanvas{ width:100%; height:auto; display:block; }

.primary-btn{
  background: linear-gradient(90deg, var(--indigo), var(--magenta));
  color:#fff;
  border:none;
  font-family:inherit;
  font-size:15px;
  font-weight:600;
  padding:13px 28px;
  border-radius:9px;
  cursor:pointer;
}
.primary-btn:hover{ filter:brightness(1.06); }

.howto{
  text-align:left;
  margin-top:18px;
  font-size:13px;
  color: var(--muted);
}
.howto summary{ cursor:pointer; font-weight:600; color:var(--text); }
.howto ol{ padding-left:20px; line-height:1.6; }

footer{
  text-align:center;
  color: var(--muted);
  font-size:12px;
  padding: 10px 0 30px;
}

@media (max-width: 640px){
  .form-grid{ grid-template-columns: 1fr; }
}