:root{
  --bg: #f7f7f5;
  --surface: #ffffff;
  --ink: #17181a;
  --ink-soft: #55585e;
  --line: #e4e3df;
  --red: #c53030;
  --blue: #22458f;
  --focus: #22458f;
  --radius: 14px;
}

*, *::before, *::after{ box-sizing: border-box; }

html, body{
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

body{
  background: var(--bg);
  color: var(--ink);
  font-family: "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

.page{
  max-width: 680px;
  margin: 0 auto;
  padding: 48px 16px 64px;
}

.page__header{
  text-align: center;
  margin-bottom: 32px;
}

.eyebrow{
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.title{
  margin: 0;
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, var(--red), var(--ink) 50%, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle{
  margin: 10px 0 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.editor{
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 24px;
}

/* Upload zone */
.upload-zone{
  border: 1.5px dashed var(--line);
  border-radius: 12px;
  padding: 40px 20px;
  text-align: center;
  transition: border-color .15s ease, background-color .15s ease;
}

.upload-zone.is-dragover{
  border-color: var(--blue);
  background: #f2f5fb;
}

.upload-zone__label{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}

.upload-zone__icon{
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  font-size: 22px;
  font-weight: 400;
  line-height: 1;
}

.upload-zone__text{
  font-size: 15px;
  font-weight: 600;
}

.upload-zone__hint{
  font-size: 13px;
  color: var(--ink-soft);
}

#fileInput{
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.error-message{
  margin: 16px 0 0;
  padding: 12px 14px;
  border-radius: 8px;
  background: #fdecec;
  border: 1px solid #f3b9b9;
  color: #8a2323;
  font-size: 14px;
}

/* Canvas stage */
.canvas-stage{
  display: flex;
  flex-direction: column;
  align-items: center;
}

.canvas-wrap{
  width: 100%;
  max-width: 420px;
  aspect-ratio: 1 / 1;
  margin: 0 auto;
  border-radius: 50%;
  overflow: hidden;
  background: #efefec;
  touch-action: none;
  cursor: grab;
}

.canvas-wrap.is-dragging{
  cursor: grabbing;
}

#editorCanvas{
  width: 100%;
  height: 100%;
  display: block;
  user-select: none;
  -webkit-user-select: none;
}

/* Frame picker */
.frame-picker{
  width: 100%;
  max-width: 420px;
  margin: 20px auto 0;
  text-align: center;
}

.frame-picker__label{
  margin: 0 0 10px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.frame-picker__options{
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.frame-option{
  width: 56px;
  height: 56px;
  padding: 0;
  border-radius: 50%;
  border: 2px solid var(--line);
  background: var(--surface) center / cover no-repeat;
  cursor: pointer;
  flex: 0 0 auto;
}

.frame-option:hover{
  border-color: #c7c6c1;
}

.frame-option.is-selected{
  border-color: var(--ink);
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--ink);
}

/* Controls */
.controls{
  width: 100%;
  max-width: 420px;
  margin: 24px auto 0;
}

.zoom-control{
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.icon-btn{
  flex: 0 0 auto;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-btn:hover{ background: #f0f0ee; }
.icon-btn:active{ background: #e6e6e3; }

.zoom-slider{
  flex: 1 1 auto;
  appearance: none;
  -webkit-appearance: none;
  height: 4px;
  border-radius: 2px;
  background: var(--line);
  outline-offset: 4px;
}

.zoom-slider::-webkit-slider-thumb{
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--line);
}

.zoom-slider::-moz-range-thumb{
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--ink);
  cursor: pointer;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px var(--line);
}

.button-row{
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
}

.button-row--download{
  flex-direction: column;
  margin-top: 18px;
}

.btn{
  flex: 1;
  border-radius: 10px;
  padding: 13px 16px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
}

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

.btn--primary:hover{ background: #000; }

.btn--ghost{
  background: var(--surface);
  color: var(--ink);
  border-color: var(--line);
  position: relative;
  overflow: hidden;
}

.btn--ghost:hover{ background: #f0f0ee; }

.btn--file input[type="file"]{
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* Focus visibility for keyboard users */
a:focus-visible,
button:focus-visible,
input:focus-visible,
label:focus-visible{
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

.privacy-note{
  margin: 24px 0 0;
  text-align: center;
  font-size: 12px;
  color: var(--ink-soft);
}

/* Mobile */
@media (max-width: 480px){
  .editor{
    padding: 22px 16px;
  }
  .button-row--download .btn{
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce){
  *{
    transition: none !important;
    animation: none !important;
  }
}