body { font-family: sans-serif; background: #f5f7f9; color: #1a1a1a; margin: 0; padding: 0; } header { background: #0f4c81; color: #fff; padding: 24px; text-align: center; } main { padding: 24px; max-width: 1100px; margin: auto; } .card { background: #fff; padding: 24px; margin-bottom: 20px; border-radius: 12px; box-shadow: 0 2px 6px rgba(0,0,0,0.08); } h2 { color: #0f4c81; } footer { background: #0f4c81; color: #fff; padding: 20px; text-align: center; margin-top: 40px; } PID کنترلر در …

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