* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, sans-serif;
}

body {
    background: #f0f2f5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #333;
}

.container {
    max-width: 1000px;
    width: 100%;
    padding: 30px;
    background-color: #f8f9fa;
    border-radius: 20px;
    box-shadow: none;
    text-align: center;
}

header {
    margin-bottom: 40px;
}

h1 {
    font-size: 2.8rem;
    color: #2c3e50;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2rem;
    color: #7f8c8d;
    max-width: 600px;
    margin: 0 auto 30px;
    line-height: 1.6;
}

.icon-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.icon-card {
    background: white;
    border-radius: 16px;
    padding: 30px 20px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    border: 2px solid transparent;
}

.icon-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.12);
    border-color: #3498db;
}

.icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
    font-size: 2.2rem;
    color: white;
}

.icon-home {
    background-color: #3498db;
}

.icon-search {
    background-color: #9b59b6;
}

.icon-user {
    background-color: #1abc9c;
}

.icon-settings {
    background-color: #f39c12;
}

.icon-docs {
    background-color: #e74c3c;
}

.icon-contact {
    background-color: #34495e;
}

.icon-card h3 {
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: #2c3e50;
}

.icon-card p {
    color: #7f8c8d;
    font-size: 0.95rem;
    line-height: 1.5;
}

.home-btn {
    display: inline-block;
    margin-top: 20px;
    padding: 14px 35px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    font-size: 1.2rem;
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.3);
    transition: all 0.3s ease;
}

.home-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(52, 152, 219, 0.4);
    background-color: #2980b9;
}

.instructions {
    margin-top: 40px;
    font-size: 0.95rem;
    color: #7f8c8d;
    text-align: center;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: 10px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.footer {
    margin-top: 40px;
    color: #7f8c8d;
    font-size: 0.9rem;
    text-align: center;
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
    }
    
    h1 {
        font-size: 2.2rem;
    }
    
    .icon-grid {
        grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
        gap: 20px;
    }
    
    .home-btn {
        padding: 12px 30px;
        font-size: 1.1rem;
    }
}

@media (max-width: 480px) {
    .icon-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .icon-card {
        padding: 20px 15px;
    }
    
    .icon {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
    }
    
    .home-btn {
        width: 90%;
        padding: 14px 20px;
    }
}