* { margin: 0; padding: 0; box-sizing: border-box; font-family: Tahoma, sans-serif; }
body { background: #f0fdfa; color: #333; direction: rtl; padding: 20px; }
.container { max-width: 900px; margin: 0 auto; }
.card { background: #fff; border-radius: 12px; padding: 20px; margin-bottom: 15px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); border-top: 4px solid #14b8a6; }
h1, h2, h3 { color: #0f766e; margin-bottom: 10px; }
.btn { background: #14b8a6; color: #fff; border: none; padding: 10px 20px; border-radius: 8px; cursor: pointer; text-decoration: none; display: inline-block; margin: 5px 0; }
.btn:hover { background: #0f766e; }
.btn-danger { background: #ef4444; }
.btn-danger:hover { background: #dc2626; }
input, select { width: 100%; padding: 10px; margin: 5px 0; border: 1px solid #ddd; border-radius: 8px; }
table { width: 100%; border-collapse: collapse; margin-top: 10px; }
th, td { padding: 10px; border-bottom: 1px solid #eee; text-align: right; }
th { background: #14b8a6; color: #fff; }
.nav { background: #14b8a6; color: #fff; padding: 15px; border-radius: 12px; margin-bottom: 20px; display: flex; justify-content: space-between; }
.nav a { color: #fff; text-decoration: none; margin-left: 15px; }
.grade { display: inline-block; padding: 5px 15px; border-radius: 20px; background: #ccfbf1; color: #0f766e; font-weight: bold; margin: 3px; }