* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
    color: white;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2rem;
    opacity: 0.9;
}

main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.card {
    background: white;
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
}

.card h2 {
    color: #4a5568;
    margin-bottom: 20px;
    border-bottom: 2px solid #667eea;
    padding-bottom: 10px;
}

.calculator input {
    width: 100%;
    padding: 12px;
    margin: 10px 0;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
}

.calculator input:focus {
    outline: none;
    border-color: #667eea;
}

.buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 15px 0;
}

button {
    background: #667eea;
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s ease;
}

button:hover {
    background: #5a67d8;
}

.result {
    margin-top: 15px;
    padding: 15px;
    background: #f7fafc;
    border-radius: 8px;
    font-weight: bold;
    text-align: center;
    font-size: 1.2rem;
}

.todo input {
    width: calc(100% - 100px);
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 16px;
}

.todo button {
    width: 90px;
}

#todoList {
    list-style: none;
    margin-top: 15px;
}

#todoList li {
    background: #f7fafc;
    padding: 12px;
    margin: 8px 0;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#todoList li button {
    background: #e53e3e;
    padding: 6px 12px;
    font-size: 14px;
}

#todoList li button:hover {
    background: #c53030;
}

.weather {
    margin-top: 15px;
    padding: 15px;
    background: #f7fafc;
    border-radius: 8px;
    text-align: center;
}

footer {
    text-align: center;
    color: white;
    padding: 20px;
    opacity: 0.8;
}

@media (max-width: 768px) {
    main {
        grid-template-columns: 1fr;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .container {
        padding: 10px;
    }
}
/* تنسيقات إضافية للروابط */
a {
    color: #667eea;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #5a67d8;
    text-decoration: underline;
}

/* تنسيق خاص لرابط سياسة الخصوصية في الفوتر */
footer a {
    color: #cbd5e0;
}

footer a:hover {
    color: white;
}