* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 24px;
  font-family: Arial, sans-serif;
  background: #f3f5f8;
  color: #1f2933;
}

.wrapper {
  max-width: 920px;
  margin: 0 auto;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

h1 {
  margin-top: 0;
  margin-bottom: 24px;
  text-align: center;
  font-size: 1.8rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.field-group {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.field-group.full {
  grid-column: 1 / -1;
}

label {
  font-weight: 600;
}

input[type="text"],
input[type="email"],
textarea {
  width: 100%;
  border: 1px solid #ccd5df;
  border-radius: 10px;
  padding: 14px 16px;
  font-size: 1rem;
  background: #fff;
}

textarea {
  resize: vertical;
  min-height: 120px;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.checkbox-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-weight: 500;
}

.checkbox-row input {
  margin-top: 3px;
}

.signature-box {
  border: 2px dashed #b7c2cf;
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  touch-action: none;
}

canvas {
  display: block;
  width: 100%;
  height: 240px;
  background: #fff;
  touch-action: none;
  cursor: crosshair;
}

.hidden-file-input {
  display: none;
}

.button-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  border: 0;
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 1rem;
  cursor: pointer;
}

.btn-primary {
  background: #2563eb;
  color: #fff;
  font-weight: 700;
}

.btn-secondary {
  background: #e8edf3;
  color: #18212b;
  font-weight: 600;
}

.file-info {
  font-size: 0.95rem;
  color: #4b5563;
}

.status {
  min-height: 24px;
  font-size: 0.98rem;
  margin-top: 8px;
}

.status.success {
  color: #127a38;
}

.status.error {
  color: #b42318;
}

@media (max-width: 700px) {
  body {
    padding: 14px;
  }

  .card {
    padding: 18px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  canvas {
    height: 200px;
  }

  .btn {
    width: 100%;
  }
}


.preview-wrap {
  display: none;
  margin-top: 8px;
}

.preview-wrap.active {
  display: block;
}

.preview-image {
  display: block;
  max-width: 100%;
  max-height: 260px;
  border: 1px solid #ccd5df;
  border-radius: 10px;
  background: #fff;
}