:root { --primary: #2563eb; --bg: #f8fafc; --text: #1e293b; }
body { font-family: 'Segoe UI', sans-serif; background: var(--bg); color: var(--text); display: flex; justify-content: center; padding: 40px; }
.card { background: white; padding: 2rem; border-radius: 12px; box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1); width: 100%; max-width: 500px; }
h2 { text-align: center; color: var(--primary); margin-bottom: 1.5rem; }
.grid-inputs { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
input { width: 100%; padding: 10px; margin: 8px 0; border: 1px solid #ddd; border-radius: 6px; box-sizing: border-box; }
button { width: 100%; background: var(--primary); color: white; border: none; padding: 12px; border-radius: 6px; cursor: pointer; font-weight: bold; margin-top: 10px; }
button:hover { background: #1d4ed8; }
.error { color: #dc2626; background: #fee2e2; padding: 10px; border-radius: 6px; margin-bottom: 1rem; font-size: 0.9rem; }
table { width: 100%; border-collapse: collapse; margin-top: 20px; }
th, td { padding: 12px; border-bottom: 1px solid #eee; text-align: left; }
.btn-download { color: var(--primary); text-decoration: none; font-weight: 500; }