:root {
  --red: #e8201a;
  --orange: #ff9a00;
  --bg: #f6f3f5;
  --ink: #1b1020;
  --muted: #6b5f73;
  --line: #e8e1ea;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, sans-serif;
}

header {
  background: linear-gradient(120deg, #2a0638, #8a0f1f 60%, var(--red));
  color: #fff;
  padding: 22px 20px;
  border-bottom: 4px solid var(--orange);
  text-align: center;
}
header small { color: #ffc04d; font-weight: 700; letter-spacing: .14em; font-size: 12px; }
header h1 { margin: 4px 0; font-size: clamp(26px, 5vw, 40px); }
header p { margin: 0; opacity: .85; }

main {
  max-width: 1000px;
  margin: 0 auto;
  padding: 24px 20px 40px;
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 28px;
  align-items: start;
}
.intro { grid-column: 1 / -1; color: var(--muted); max-width: 560px; line-height: 1.5; margin: 0; }

.panel {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
  box-shadow: 0 8px 28px rgba(0,0,0,.1);
}
.step { padding: 14px 0; border-top: 1px solid var(--line); }
.step:first-child { border-top: 0; padding-top: 0; }
label { display: block; font-size: 12px; font-weight: 700; letter-spacing: .08em; color: var(--muted); margin-bottom: 8px; }

.drop {
  border: 1.5px dashed var(--line);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
  cursor: pointer;
  font-size: 14px;
}
.drop small { display: block; color: var(--muted); margin-top: 4px; }
.drop.over { border-color: var(--red); }

input[type=text] {
  width: 100%;
  padding: 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #f3eef5;
  font-size: 16px;
}
input[type=range] { width: 100%; accent-color: var(--red); }

button {
  width: 100%;
  padding: 14px;
  border: 0;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  background: linear-gradient(90deg, var(--red), var(--orange));
  cursor: pointer;
}
button:disabled { opacity: .45; cursor: not-allowed; }

.preview { text-align: center; }
canvas {
  width: 100%;
  max-width: 520px;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 14px 40px rgba(0,0,0,.35);
  touch-action: none;
  cursor: grab;
  background: #2a0638;
}
.hint { font-size: 12px; color: var(--muted); margin-top: 10px; }

/* Phones: stack everything, preview on top */
@media (max-width: 760px) {
  main { grid-template-columns: 1fr; }
  .preview { order: -1; }
}