* { margin: 0; padding: 0; box-sizing: border-box; }
body { 
    font-family: 'Segoe UI', sans-serif; 
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh; 
    padding: 20px; 
}
.container { 
    max-width: 500px; margin: 0 auto; 
    background: white; border-radius: 24px; 
    box-shadow: 0 25px 50px rgba(0,0,0,0.15); 
    overflow: hidden; 
}
header { 
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%); 
    color: white; text-align: center; 
    padding: 30px 20px; 
}
header h1 { font-size: 1.8em; margin-bottom: 5px; }
header p { opacity: 0.9; font-size: 1.1em; }

.form-container { padding: 30px 25px; }
.input-group { margin-bottom: 25px; }
.input-group label { 
    display: block; margin-bottom: 8px; 
    font-weight: 600; color: #333; 
}
.input-group input, .input-group textarea { 
    width: 100%; padding: 16px; 
    border: 2px solid #e2e8f0; border-radius: 16px; 
    font-size: 16px; transition: all 0.3s; 
    background: #f8fafc; 
}
.input-group input:focus, .input-group textarea:focus { 
    outline: none; border-color: #4facfe; 
    background: white; box-shadow: 0 0 0 4px rgba(79,172,254,0.1); 
}
.input-group small { color: #64748b; font-size: 13px; margin-top: 5px; display: block; }
button[type="submit"] { 
    width: 100%; padding: 20px; background: linear-gradient(135deg, #10b981 0%, #059669 100%); 
    color: white; border: none; border-radius: 16px; font-size: 18px; font-weight: 600; 
    cursor: pointer; transition: all 0.3s; 
}
button[type="submit"]:hover { transform: translateY(-2px); box-shadow: 0 10px 25px rgba(16,185,129,0.3); }

.result { padding: 30px 25px; background: #f8fafc; }
.hidden { display: none; }
.qris-preview { text-align: center; margin-bottom: 30px; }
.qris-preview h3 { color: #1e293b; margin-bottom: 20px; }
#qrcode { background: white; padding: 25px; border-radius: 20px; box-shadow: 0 15px 35px rgba(0,0,0,0.1); margin: 0 auto 20px; }

.info-card { background: white; padding: 25px; border-radius: 20px; margin-bottom: 25px; box-shadow: 0 10px 25px rgba(0,0,0,0.08); }
.info-card h4 { color: #1e293b; margin-bottom: 20px; }
.info-row { display: flex; justify-content: space-between; margin-bottom: 15px; font-size: 16px; }
.info-row span { color: #64748b; }
.info-row strong { color: #1e293b; font-size: 18px; }

.action-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
.btn-copy { background: #3b82f6; }
.btn-share { background: #f59e0b; }
.btn-download { background: #ef4444; grid-column: span 2; }
.action-buttons button { 
    padding: 16px; border: none; border-radius: 16px; 
    color: white; font-size: 16px; font-weight: 600; cursor: pointer; 
    transition: all 0.3s; 
}
.action-buttons button:hover { transform: translateY(-2px); opacity: 0.9; }

@media (max-width: 480px) { 
    body { padding: 10px; } 
    .container { border-radius: 20px; margin: 10px; }
}