* {
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    color: #333;
    line-height: 1.6;
}

header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 1em 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5em;
    font-weight: bold;
}

nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
}

nav ul li {
    margin: 0 10px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 8px 15px;
    border-radius: 20px;
    transition: background-color 0.3s ease;
    display: block;
}

nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 1.5em;
    cursor: pointer;
}

main {
    padding: 40px 20px;
    max-width: 1200px;
    margin: 0 auto;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
    margin-bottom: 20px;
}

h1, h2, h3 {
    color: #2c3e50;
}

h1 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 2.5em;
}

#attendance-calculator-promo {
    text-align: center;
    padding: 40px;
    background: linear-gradient(135deg, #74b9ff 0%, #0984e3 100%);
    color: #fff;
    border-radius: 10px;
    margin: 20px 0;
}

#attendance-calculator-promo h2 {
    color: #fff;
    font-size: 2em;
    margin-bottom: 15px;
}

footer {
    text-align: center;
    padding: 30px 20px;
    background: linear-gradient(135deg, #2d3436 0%, #636e72 100%);
    color: #fff;
    margin-top: 40px;
}

.button {
    display: inline-block;
    background: linear-gradient(135deg, #00b894 0%, #00a085 100%);
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 25px;
    margin-top: 15px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    font-weight: 500;
}

.button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 184, 148, 0.4);
}

/* Form Styles */
form {
    max-width: 600px;
    margin: 0 auto;
}

form p {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #2c3e50;
}

input[type="text"],
input[type="email"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="number"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: #667eea;
}

button[type="submit"] {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: transform 0.3s ease;
}

button[type="submit"]:hover {
    transform: translateY(-2px);
}

/* Calculator Styles */
.calculator-container {
    background: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    margin: 20px 0;
}

.result {
    background: linear-gradient(135deg, #00b894 0%, #00a085 100%);
    color: #fff;
    padding: 20px;
    border-radius: 10px;
    text-align: center;
    margin-top: 20px;
    font-size: 1.2em;
    font-weight: bold;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .mobile-menu-toggle {
        display: block;
        position: absolute;
        top: 15px;
        right: 20px;
    }
    
    nav {
        width: 100%;
        margin-top: 20px;
    }
    
    nav ul {
        flex-direction: column;
        display: none;
    }
    
    nav ul.show {
        display: flex;
    }
    
    nav ul li {
        margin: 5px 0;
        width: 100%;
        text-align: center;
    }
    
    nav ul li a {
        display: block;
        padding: 15px;
    }
    
    main {
        margin: 10px;
        padding: 20px;
    }
    
    h1 {
        font-size: 2em;
    }
    
    #attendance-calculator-promo {
        padding: 20px;
    }
    
    #attendance-calculator-promo h2 {
        font-size: 1.5em;
    }
}

@media (max-width: 480px) {
    .header-content {
        padding: 0 10px;
    }
    
    main {
        margin: 5px;
        padding: 15px;
    }
    
    h1 {
        font-size: 1.8em;
    }
    
    .calculator-container {
        padding: 20px;
    }
}




.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.tool-card {
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    padding: 25px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.tool-card h3 {
    color: #4a4a4a;
    margin-top: 0;
    margin-bottom: 15px;
    font-size: 1.5em;
}

.tool-card p {
    color: #666;
    font-size: 0.95em;
    line-height: 1.5;
    margin-bottom: 20px;
}

.tool-card .button {
    background: linear-gradient(135deg, #007bff 0%, #0056b3 100%);
    padding: 10px 20px;
    font-size: 0.9em;
}

.tool-card .button:hover {
    background: linear-gradient(135deg, #0056b3 0%, #007bff 100%);
}

.footer-nav ul {
    list-style: none;
    padding: 0;
    margin: 15px 0 0;
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.footer-nav ul li {
    margin: 0 10px;
}

.footer-nav ul li a {
    color: #fff;
    text-decoration: none;
    padding: 5px 10px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.footer-nav ul li a:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

@media (max-width: 768px) {
    .tool-grid {
        grid-template-columns: 1fr;
    }
}