:root {
  --teal-dark: #073540;
  --teal: #0a4a58;
  --cream: #f5eedc;
  --white: #ffffff;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--teal-dark);
  color: var(--cream);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
}

.wrap {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 16px 48px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.head {
  text-align: center;
}

.head h1 {
  font-family: "Permanent Marker", cursive;
  font-size: 32px;
  margin: 0 0 6px;
  letter-spacing: 0.5px;
}

.head p {
  margin: 0;
  opacity: 0.85;
  font-size: 14px;
}

.stage {
  position: relative;
  width: 100%;
  border-radius: 10px;
  overflow: hidden;
  background: #04262d;
  box-shadow: 0 8px 24px rgba(0,0,0,0.35);
  touch-action: pan-y;
}

#preview {
  width: 100%;
  height: auto;
  display: block;
  cursor: grab;
}
#preview.dragging { cursor: grabbing; }

.stage-hint {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
  font-size: 14px;
  color: var(--cream);
  opacity: 0.75;
  pointer-events: none;
  background: rgba(4, 38, 45, 0.15);
}
.stage-hint[hidden] { display: none; }

.controls {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.ctl {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
}
.ctl input[type="range"] {
  flex: 1;
}
.drag-hint {
  margin: 0;
  font-size: 12px;
  opacity: 0.65;
  text-align: center;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  opacity: 0.9;
}

.field input[type="text"] {
  background: #0d5262;
  border: 1px solid #14748a;
  border-radius: 8px;
  padding: 12px 14px;
  color: var(--white);
  font-size: 16px;
  outline: none;
}
.field input[type="text"]:focus {
  border-color: var(--cream);
}

.file-field input[type="file"] {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  overflow: hidden;
}

.file-btn {
  background: #0d5262;
  border: 1px dashed #14748a;
  border-radius: 8px;
  padding: 14px;
  text-align: center;
  font-size: 15px;
  cursor: pointer;
}
.file-btn.has-file {
  border-style: solid;
  border-color: var(--cream);
}

.btn-primary {
  background: var(--cream);
  color: var(--teal-dark);
  border: none;
  border-radius: 10px;
  padding: 15px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}
.btn-primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-secondary {
  background: transparent;
  color: var(--cream);
  border: 1px solid var(--cream);
  border-radius: 10px;
  padding: 14px;
  font-size: 15px;
  cursor: pointer;
}

.btn-link {
  background: none;
  border: none;
  color: var(--cream);
  opacity: 0.7;
  text-decoration: underline;
  font-size: 13px;
  cursor: pointer;
  padding: 6px;
}

.result {
  display: flex;
  flex-direction: column;
  gap: 10px;
}