:root {
  --black: black;
  --aquamarine: #89edbe;
  --hot-pink: #f065a5;
  --dark-slate-grey: #1e5a44;
  --white: white;
  --medium-violet-red: #ad2b67;
  --grey: #817f7f;
}

body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #f065a5 0%, #89edbe 100%) no-repeat;
  background-attachment: fixed;
  color: #333;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  background: #fff;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
  padding: 32px;
  overflow: hidden;
}

header, main, .controls, .qr-preview, #qr-code {
  background: var(--white);
}

header {
  text-align: center;
  margin-bottom: 24px;
}

header h1 {
  font-size: 2.8rem;
  color: #222;
  font-weight: 700;
  margin-bottom: 8px;
}

header p {
  font-size: 1.2rem;
  color: #555;
  margin: 0;
}

main {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
  justify-content: center;
  border-radius: 12px;
}

.qr-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

#qr-code {
  width: 300px;
  height: 300px;
  background: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--black);
}

button {
  background: linear-gradient(135deg, #89edbe, #66cda3);
  color: #fff;
  border: none;
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 600;
  transition: background 0.3s, transform 0.2s;
}

button:hover {
  background: linear-gradient(135deg, #66cda3, #4cae8d);
  transform: scale(1.05);
}

.controls {
  flex: 1 1 320px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  background: #f9f9f9;
  border-radius: 12px;
  padding: 28px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border: 1px solid #ddd;
}

.controls label {
  font-size: 1.1rem;
  color: #333;
  font-weight: 500;
}

.controls input[type="text"] {
  padding: 9px;
  border: 1.5px solid var(--black);
  border-radius: 6px;
  font-size: 1rem;
  background: var(--white);
  color: var(--dark-slate-grey);
  font-family: 'Montserrat', 'Segoe UI', Arial, sans-serif;
}

.controls input[type="color"] {
  width: 44px;
  height: 36px;
  border: none;
  background: none;
  padding: 0;
}

.controls select {
  padding: 8px;
  border: 1.5px solid var(--black);
  border-radius: 6px;
  font-size: 1rem;
  background: var(--white);
  color: var(--dark-slate-grey);
  font-family: 'Montserrat', 'Segoe UI', Arial, sans-serif;
}

.color-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;500;600&display=swap');