* { box-sizing: border-box; }
body { margin: 0; padding: 30px 15px; background: #f5f7f9; color: #222; font-family: Arial, sans-serif; }
.container { max-width: 1000px; margin: auto; }
h1 { margin-bottom: 25px; }
h3 { margin-top: 0; }
.card { background: #fff; padding: 20px; margin-bottom: 20px; border-radius: 10px; box-shadow: 0 2px 10px rgba(0, 0, 0, .06); }
input[type="text"], input[type="file"], textarea, select { width: 100%; padding: 10px; border: 1px solid #ddd; border-radius: 6px; font-size: 14px; }
button { width: 100%; padding: 14px; border: 0; border-radius: 8px; background: #25D366; color: white; font-size: 16px; font-weight: bold; cursor: pointer; }
button:hover { opacity: .9; }