.poster-body {
  min-height: 100vh;
  margin: 0;
  background: linear-gradient(180deg, #eef5ff 0%, #f9fcff 100%);
  font-family: var(--font);
}

.poster-topbar {
  display: grid;
  grid-template-columns: 42px 1fr 42px;
  align-items: center;
  padding: calc(10px + env(safe-area-inset-top, 0px)) 16px 12px;
  color: #fff;
  background: linear-gradient(135deg, #095dff 0%, #0039d8 72%);
}

.poster-topbar h1 {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  text-align: center;
}

.poster-back {
  color: #fff;
  font-size: 36px;
  line-height: 1;
  text-decoration: none;
}

.poster-main {
  padding: 16px;
  padding-bottom: calc(24px + env(safe-area-inset-bottom, 0px));
}

.poster-hint {
  margin: 0 0 14px;
  font-size: 13px;
  color: #5a6f94;
  text-align: center;
  line-height: 1.5;
}

.poster-canvas-wrap {
  display: flex;
  justify-content: center;
  padding: 12px;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 8px 28px rgba(8, 21, 55, 0.1);
}

#poster-canvas {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 8px;
}

.poster-actions {
  display: grid;
  gap: 10px;
  margin-top: 16px;
}

.poster-btn {
  min-height: 48px;
  font-size: 15px;
  font-weight: 700;
  border: 0;
  border-radius: 10px;
  cursor: pointer;
  font-family: inherit;
}

.poster-btn--primary {
  color: #fff;
  background: linear-gradient(135deg, #0052d9, #003a9e);
}

.poster-btn:not(.poster-btn--primary) {
  color: #0052d9;
  background: #eef4ff;
}