:root {
  --navy: #1a3a7a;
  --royal-blue: #2456c9;
  --crimson: #d92b2b;
  --gold: #f0b90b;
  --paper: #fdfaf3;
  --ink: #1c2333;
  --muted: #6b7280;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Georgia", "Times New Roman", serif;
  background: linear-gradient(180deg, #f7f3e8 0%, #efe8d6 100%);
  color: var(--ink);
  display: flex;
  justify-content: center;
  padding: 40px 20px 40px;
}

.wrap {
  width: 100%;
  max-width: 550px;
}

header {
  text-align: center;
  margin-bottom: 28px;
}

.eyebrow {
  font-family: "Helvetica Neue", Arial, sans-serif;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 12px;
  color: var(--crimson);
  font-weight: 700;
  margin-bottom: 10px;
}

h1 {
  font-size: 28px;
  line-height: 1.25;
  margin: 0 0 8px;
  color: var(--navy);
}

.sub {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  color: var(--muted);
  margin: 0;
}

.gold-rule {
  height: 3px;
  width: 64px;
  background: var(--gold);
  margin: 18px auto 0;
  border-radius: 2px;
}

.stage {
  background: #fff;
  border: 1px solid #e7e0cc;
  border-radius: 6px;
  padding: 28px;
  box-shadow: 0 8px 30px rgba(26, 58, 122, 0.08);
}

.drop {
  position: relative;
  aspect-ratio: 1 / 1;
  width: 100%;
  border: 2px dashed #c9c2a8;
  border-radius: 4px;
  background: repeating-conic-gradient(#f5f2e8 0% 25%, #efeade 0% 50%) 50% /
    24px 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  cursor: pointer;
  transition: border-color 0.2s ease;
}

.drop.has-image {
  cursor: grab;
  border-style: solid;
  border-color: #e7e0cc;
}

.drop.has-image.dragging {
  cursor: grabbing;
}

.drop:hover {
  border-color: var(--royal-blue);
}

.drop.dragover {
  border-color: var(--crimson);
  background-color: #fff5f5;
}

.drop canvas {
  width: 100%;
  height: 100%;
  display: block;
  touch-action: none;
  user-select: none;
  -webkit-user-drag: none;
}

.placeholder {
  text-align: center;
  padding: 24px;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.placeholder .icon {
  width: 52px;
  height: 52px;
  margin: 0 auto 14px;
  color: var(--royal-blue);
}

.placeholder .icon svg {
  width: 100%;
  height: 100%;
}

.placeholder p {
  margin: 0;
  font-size: 15px;
  color: var(--ink);
  font-weight: 600;
}

.placeholder span {
  display: block;
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--muted);
}

.hint-pill {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: rgba(26, 30, 46, 0.72);
  padding: 6px 13px;
  border-radius: 999px;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.2s ease;
  white-space: nowrap;
}

.drop.has-image:hover .hint-pill,
.drop.has-image.dragging .hint-pill {
  opacity: 1;
}

.change-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: rgba(26, 30, 46, 0.72);
  border: none;
  padding: 7px 12px;
  border-radius: 999px;
  cursor: pointer;
  display: none;
}

.drop.has-image .change-btn {
  display: inline-flex;
}

.change-btn:hover {
  background: rgba(26, 30, 46, 0.92);
}

input[type="file"] {
  display: none;
}

.zoom-row {
  display: none;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  font-family: "Helvetica Neue", Arial, sans-serif;
}

.zoom-row.visible {
  display: flex;
}

.zoom-row label {
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 600;
  white-space: nowrap;
}

.zoom-row input[type="range"] {
  flex: 1;
  accent-color: var(--royal-blue);
}

.actions {
  margin-top: 18px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

button.action-btn {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 12px 20px;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition:
    transform 0.08s ease,
    box-shadow 0.15s ease,
    background 0.15s ease;
  flex: 1;
  min-width: 140px;
}

button.action-btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--royal-blue);
  color: #fff;
}

.btn-primary:hover {
  background: var(--navy);
}

.btn-primary:disabled {
  background: #c7cedd;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  color: var(--crimson);
  border: 1.5px solid var(--crimson);
}

.btn-secondary:hover {
  background: #fff5f5;
}

.btn-secondary:disabled {
  color: #c9c2a8;
  border-color: #e2ddc8;
  cursor: not-allowed;
  background: transparent;
}

.note {
  margin-top: 16px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 12.5px;
  color: var(--muted);
  text-align: center;
}

.howto {
  margin-top: 26px;
  background: #fff;
  border: 1px solid #e7e0cc;
  border-left: 3px solid var(--gold);
  border-radius: 4px;
  padding: 22px 26px;
  box-shadow: 0 8px 30px rgba(26, 58, 122, 0.06);
}

.howto h2 {
  margin: 0 0 14px;
  font-size: 15px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--navy);
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-weight: 700;
}

.howto ol {
  margin: 0;
  padding-left: 20px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.howto ol li {
  margin-bottom: 6px;
}
.howto ol li:last-child {
  margin-bottom: 0;
}
.howto strong {
  color: var(--royal-blue);
}

footer {
  text-align: center;
  margin-top: 30px;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 11.5px;
  color: #a39c85;
  letter-spacing: 0.04em;
  line-height: 1.8;
}

/* Frame-loading spinner, shown over the drop zone while frame.png fetches */
.frame-loader {
  position: absolute;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 10px;
  background: rgba(255, 255, 255, 0.88);
  z-index: 5;
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 12.5px;
  color: var(--muted);
  font-weight: 600;
}

.frame-loader.visible {
  display: flex;
}

.spinner {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 3px solid #e7e0cc;
  border-top-color: var(--royal-blue);
  animation: spin 0.8s linear infinite;
}

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

@media (max-width: 480px) {
  .stage {
    padding: 18px;
  }
  h1 {
    font-size: 23px;
  }
}