:root{
  --bg: #eef6fc;
  --sky: #93cdf2;
  --purple: #7a1f9c;
  --purple-dark: #5c1478;
  --navy: #16233b;
  --white: #ffffff;
  --line: #d7e6f3;
  --radius: 14px;
}

*{ box-sizing: border-box; }

body{
  margin:0;
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  background: linear-gradient(180deg, var(--bg) 0%, #dcedf9 100%);
  color: var(--navy);
  min-height:100vh;
}

.app{
  max-width: 1180px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}

.topbar{
  text-align:center;
  margin-bottom: 28px;
}
.topbar h1{
  font-size: clamp(22px, 4vw, 32px);
  margin: 0 0 6px;
  color: var(--purple-dark);
  letter-spacing: 0.2px;
}
.subtitle{
  margin:0;
  color:#4a5b73;
  font-size: 15px;
}

.layout{
  display:grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  align-items:start;
}
@media (max-width: 860px){
  .layout{ grid-template-columns: 1fr; }
}

.preview-pane{
  background: var(--white);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: 0 6px 24px rgba(20,40,80,0.10);
}

.canvas-wrap{
  position:relative;
  width:100%;
  border-radius: 8px;
  overflow:hidden;
  background: repeating-conic-gradient(#f1f1f1 0% 25%, #ffffff 0% 50%) 50% / 20px 20px;
  touch-action: none;
}

#posterCanvas{
  display:block;
  width:100%;
  height:auto;
  cursor: grab;
}
#posterCanvas:active{ cursor: grabbing; }

.hint{
  position:absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(20,20,20,0.68);
  color:#fff;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  pointer-events:none;
  opacity:0;
  transition: opacity .25s ease;
  white-space: nowrap;
}
.hint.show{ opacity:1; }

.status{
  margin-top: 10px;
  font-size: 13px;
  color: #5a6b83;
  text-align:center;
}
.status.error{ color:#c0392b; font-weight:600; }

.spinner{
  width: 26px;
  height: 26px;
  margin: 12px auto 0;
  border: 3px solid var(--line);
  border-top-color: var(--purple);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  display: none;
}
.spinner.show{ display: block; }
@keyframes spin{
  to{ transform: rotate(360deg); }
}

.controls-pane{
  display:flex;
  flex-direction:column;
  gap: 16px;
}

.card{
  background: var(--white);
  border-radius: var(--radius);
  padding: 18px 20px;
  box-shadow: 0 6px 24px rgba(20,40,80,0.08);
}
.card h2{
  font-size: 15px;
  margin: 0 0 12px;
  color: var(--purple-dark);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.file-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:100%;
  padding: 12px 16px;
  border-radius: 10px;
  border: 2px solid var(--purple);
  color: var(--purple-dark);
  font-weight:600;
  cursor:pointer;
  transition: background .15s ease, color .15s ease;
  background: #fff;
}
.file-btn:hover{ background: var(--purple); color:#fff; }

.zoom-row{
  display:flex;
  align-items:center;
  gap: 10px;
  margin-top: 14px;
}
.zoom-row span{
  font-size: 13px;
  color:#4a5b73;
  margin-right: 4px;
}
.zoom-row button{
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: var(--sky);
  color: var(--navy);
  font-size: 20px;
  font-weight: 700;
  cursor:pointer;
  line-height:1;
}
.zoom-row button:hover{ background: #6fb9e8; }
.zoom-row button:active{ transform: scale(0.95); }

#nameInput{
  width:100%;
  padding: 12px 14px;
  font-size: 16px;
  border-radius: 10px;
  border: 1.5px solid var(--line);
  outline:none;
  color: var(--navy);
}
#nameInput:focus{ border-color: var(--purple); }

.primary-btn{
  width:100%;
  padding: 14px 16px;
  border:none;
  border-radius: 10px;
  background: var(--purple-dark);
  color:#fff;
  font-size: 16px;
  font-weight:700;
  cursor:pointer;
  transition: background .15s ease, opacity .15s ease;
}
.primary-btn:hover:not(:disabled){ background: var(--purple); }
.primary-btn:disabled{
  opacity: 0.45;
  cursor: not-allowed;
}

.fineprint{
  font-size: 12px;
  color: #7a8ba3;
  margin: 10px 0 0;
  text-align:center;
}