body { font-family: 'Segoe UI', sans-serif; background: #f4f7f6; color: #333; margin: 0; padding: 20px; }
.container { max-width: 1000px; margin: auto; }
h1 { text-align: center; color: #2c3e50; }
.card { background: white; padding: 20px; margin-bottom: 20px; border-radius: 8px; box-shadow: 0 2px 5px rgba(0,0,0,0.05); }
h2 { border-bottom: 2px solid #3498db; padding-bottom: 10px; color: #2980b9; margin-top: 0; }
.form-row { display: flex; gap: 10px; align-items: center; }
.form-row select, .form-row input { flex: 1; padding: 10px; border: 1px solid #ddd; border-radius: 4px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-bottom: 15px; }
label { font-weight: 600; display: block; margin-bottom: 5px; font-size: 14px; }
input { width: 100%; padding: 10px; box-sizing: border-box; border: 1px solid #ddd; border-radius: 4px; }
.sig-container { border: 2px dashed #3498db; background: #fff; margin: 10px 0; border-radius: 4px; }
canvas { width: 100%; height: 150px; display: block; touch-action: none; }
button { padding: 10px 20px; border: none; border-radius: 4px; cursor: pointer; font-weight: 600; transition: 0.2s; }
.btn-primary { background: #3498db; color: white; }
.btn-clear { background: #e74c3c; color: white; margin-right: 10px; }
.btn-generate { width: 100%; padding: 15px; background: #2ecc71; color: white; font-size: 18px; margin-top: 20px; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { border: 1px solid #ddd; padding: 10px; text-align: left; font-size: 14px; }
th { background: #3498db; color: white; }
.sig-preview { width: 80px; height: 40px; object-fit: contain; }
.info-text { color: #2980b9; font-weight: bold; margin-top: 10px; }
.btn-danger { background: #e74c3c; color: white; padding: 5px 10px; font-size: 12px; }