:root {
    --dark-grey: #343a40;
    --light-primary: #e3f2fd;
    --light-success: #e8f5e9;
    --light-info: #e3f2fd;
    --light-warning: #fff8e1;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
}

.hero-section {
    background: linear-gradient(135deg, #007bff, #00bfff);
}

.tool-header {
    background-color: var(--dark-grey);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.icon-box {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.bg-light-primary {
    background-color: var(--light-primary);
}

.bg-light-success {
    background-color: var(--light-success);
}

.bg-light-info {
    background-color: var(--light-info);
}

.bg-light-warning {
    background-color: var(--light-warning);
}

.card {
    border: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.card-header {
    font-weight: 600;
}

.form-control, .form-select {
    padding: 10px 15px;
    border-radius: 8px;
}

.btn-primary {
    background-color: #007bff;
    border-color: #007bff;
    padding: 10px 25px;
    border-radius: 8px;
    font-weight: 600;
}

.btn-primary:hover {
    background-color: #0069d9;
    border-color: #0062cc;
}

footer a {
    text-decoration: none;
    transition: color 0.3s ease;
}

footer a:hover {
    color: #adb5bd !important;
}

.social-icons a {
    display: inline-block;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.1);
    text-align: center;
    line-height: 36px;
    transition: background-color 0.3s ease;
}

.social-icons a:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.chart-container {
    position: relative;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .hero-section {
        text-align: center;
    }
    
    .hero-section img {
        margin-top: 30px;
    }
}