:root {
  --width: 115px;
}
* {
  box-sizing: border-box;
}
body { font-family:sans-serif; margin:20px auto; }
h1 {
  margin: 5px;
  font-size: 2em;
  text-align: center;
  text-transform: uppercase;
  font-weight: bold;
}
h2 {
  margin: 0;
  font-size: 1.5em;
}
.row {
  display: grid;
  grid-template-columns: 120px 45px 45px 1fr;
  grid-template-rows: auto auto;
  gap: 2px 10px;
  align-items:center;
}
.row + .row { margin-top: 10px; }
.row label {
  grid-column: 1;
  grid-row: 1;
  font-weight: bold;
  text-align: right;
  padding-right: 10px;
  margin: 0;
}

.row input {
  margin: 0;
  grid-column: 2 / span 4;
  grid-row: 1;
  padding: 6px;
}

.row input[name="placilo_referenca_oznaka"] {
  grid-column: 2;
  text-align: right;
  border-color: transparent;
  background-color: transparent;
  padding-right: 0;
}

.row input[name="placilo_referenca_model"] {
  text-align: center;
  grid-column: 3;
  padding-right: 0;
  border-color: transparent;
  background-color: transparent;
}

.row input[name="placilo_referenca_sklic"] {
  grid-column: 4;
}

.row input.referenca {
  grid-column: 2 / span 2;

}

.row .error {
  margin: 0;
  grid-column: 2 / 5;   /* POD INPUTOM */
  grid-row: 2;
  color: red;
  font-size:0.85em;
}
select {
  padding: 10px 20px;
}
button {
  padding: 10px 20px;
  cursor: pointer;
}
.btn-block {
  margin-bottom: 20px;
  width: 100%;
}
#errors { margin-bottom:10px; }
.error { color:red; margin-top:10px; }
.container {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 30px;
  flex-flow: row nowrap;
  max-width: 1200px;
  margin: 0 auto;
}
.container > div {
  flex: 0 0 50%;
  display: flex;
  flex-flow: column;
}
#placeholder-link,
#placeholder-link:hover,
#placeholder-link:visited {
  color: blue;
  text-decoration: none;
  position: relative;
  display: inline-block;
  cursor: pointer;
}
#placeholder-text {
  text-align: center;
  display: block;
}
.placeholder-wrapper {
  position: relative;
  width: 100%;
  height: 250px;
}
#placeholder-img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}
#placeholder-result {
  background: #f6f6f6;
  padding:10px;
  width: 100%; 
  min-height: 100px;
}

#placeholder-link:not(.loading) .spinner {
  opacity: 0 !important;
}
.spinner {
  opacity: 1;
  transition: opacity 0.5s ease-in-out;
  position: absolute;
  background-color: #fff;
  display: inline-block;
  pointer-events: none;
  width: var(--width);
  height: var(--width);
  border-radius: 50%;
  animation: rotate 1s linear infinite;
  top: calc(50% - (var(--width) / 2));
  left: calc(50% - (var(--width) / 2));
}
.spinner:before {
  content: "";
  border: 10px solid #666666;
  box-sizing: border-box;
  position: absolute;
  left: 0;
  top: 0;
  inset: 0;
  border-radius: 50%;
  animation: prixClipFix 2s linear infinite
}

.presets {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.5rem;
  align-items: center;
}

.presets select {
  flex: 1;
  min-width: 0;
}

.presets button {
  flex: 0 0 auto;
  white-space: nowrap;
}

span.error ul {
  margin: 0;
  padding-left: 1.2em;
}

@keyframes rotate {
  to {
    transform: rotate(360deg)
  }
}

@keyframes prixClipFix {
  0% {
    clip-path: polygon(50% 50%,0 0,0 0,0 0,0 0,0 0)
  }

  25% {
    clip-path: polygon(50% 50%,0 0,100% 0,100% 0,100% 0,100% 0)
  }

  50% {
    clip-path: polygon(50% 50%,0 0,100% 0,100% 100%,100% 100%,100% 100%)
  }

  75% {
    clip-path: polygon(50% 50%,0 0,100% 0,100% 100%,0 100%,0 100%)
  }

  to {
    clip-path: polygon(50% 50%,0 0,100% 0,100% 100%,0 100%,0 0)
  }
}