html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem #258cfb;
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin-bottom: 60px;
}

body {
    margin: 0;
    font-family: Tahoma, Arial, sans-serif;
    background: linear-gradient(135deg, #f3f4f6, #dbeafe);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    direction: rtl;
}

.container {
    width: 100%;
    max-width: 700px;
    padding: 20px;
    box-sizing: border-box;
}

.card {
    background: #ffffff;
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
    padding: 30px;
    text-align: center;
}

h1 {
    margin-top: 0;
    color: #1e3a8a;
    font-size: 32px;
}

h2 {
    color: #1f2937;
    margin-bottom: 15px;
}

.step {
    display: none;
}

    .step.active {
        display: block;
    }

.dua-box {
    background: #f9fafb;
    border: 1px solid #d1d5db;
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    line-height: 2;
    font-size: 22px;
    color: #111827;
}

.btn {
    background: #2563eb;
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 10px;
    font-size: 18px;
    cursor: pointer;
    transition: background 0.3s ease;
}

    .btn:hover {
        background: #1d4ed8;
    }

.estekhareh-btn {
    background: #059669;
}

    .estekhareh-btn:hover {
        background: #047857;
    }

.result {
    display: none;
    margin-top: 25px;
    padding: 20px;
    background: #ecfdf5;
    border: 1px solid #a7f3d0;
    border-radius: 12px;
}

#randomNumber {
    font-size: 48px;
    font-weight: bold;
    color: #065f46;
    margin-top: 10px;
}