:root {
    --primary-color: #4CAF50;
    --secondary-color: #007BFF;
    --copy-btn-color: #3f51b5;
    --background-color: #f0f2f5;
    --card-bg-color: #fff;
    --input-border-color: #ddd;
    --text-color: #333;
}

body {
    font-family: 'Cairo', sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    min-height: 100vh;
    padding: 20px;
    direction: rtl;
    text-align: right;
    transition: background-color 0.3s;
}

.container {
    width: 100%;
    max-width: 800px;
    background-color: var(--card-bg-color);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 5px;
    animation: fadeInDown 0.8s ease-in-out;
}

.description {
    text-align: center;
    color: #666;
    margin-bottom: 30px;
    animation: fadeIn 1s ease-in-out;
}

.card {
    background-color: #f9f9f9;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 25px;
    border: 1px solid #eee;
}

.card h2 {
    color: #555;
    margin-top: 0;
    font-size: 1.5rem;
}

.card i {
    color: var(--primary-color);
    margin-left: 10px;
}

textarea, input[type="text"], input[type="number"] {
    width: 100%;
    padding: 15px;
    margin-top: 10px;
    margin-bottom: 15px;
    border: 2px solid var(--input-border-color);
    border-radius: 8px;
    font-size: 1.1rem;
    font-family: 'Cairo', sans-serif;
    box-sizing: border-box;
    transition: border-color 0.3s, box-shadow 0.3s;
}

textarea:focus, input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 8px rgba(76, 175, 80, 0.3);
}

textarea {
    resize: vertical;
}

.input-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.input-group input {
    flex: 1;
    min-width: 150px;
}

.main-buttons {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 30px;
}

.nav-button, .main-action-btn, .copy-btn, .developer-btn {
    background-color: var(--secondary-color);
    color: #fff;
    border: none;
    padding: 15px 30px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: bold;
    margin-top: 10px;
    transition: background-color 0.3s, transform 0.2s, box-shadow 0.3s;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
}

.nav-button:hover, .main-action-btn:hover, .copy-btn:hover, .developer-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.2);
}

.nav-button {
    background-color: var(--secondary-color);
}

.main-action-btn {
    background-color: var(--primary-color);
}

.copy-btn {
    background-color: var(--copy-btn-color);
    margin-top: 15px;
    display: block;
    width: 100%;
}

.copy-btn.copied {
    background-color: #4CAF50;
}

.developer-btn {
    background-color: #607d8b;
    padding: 10px 20px;
    margin-top: 20px;
}

.developer-btn:hover {
    background-color: #455a64;
}

.tool-card {
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: opacity 0.5s ease-in-out, max-height 0.5s ease-in-out, transform 0.5s ease-in-out;
}

.tool-card.visible {
    opacity: 1;
    max-height: 1000px;
    animation: fadeIn 0.7s ease-in-out;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.stats-container {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    margin-top: 20px;
    gap: 15px;
}

.stats-container div {
    background-color: #e8f5e9;
    color: #388e3c;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    color: #888;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 20px;
    }
}