:root {
    --primary-color: rgb(13, 110, 253);
    --text-color: rgb(33, 37, 41);
    --border-color: #dee2e6;
    --bg-light: #f8f9fa;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", "Noto Sans", "Liberation Sans", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    font-size: 18px;
    color: var(--text-color);
    line-height: 1.6;
}

.text-primary {
    color: var(--primary-color) !important;
}

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

.btn-primary:hover {
    background-color: rgb(10, 88, 202);
    border-color: rgb(10, 88, 202);
}

.btn-outline-primary {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-outline-primary:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

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

header a {
    color: var(--text-color);
    font-size: 16px;
}

header a:hover {
    color: var(--primary-color);
}

.display-6 {
    font-size: 3.5rem;
    font-weight: 400;
    color: #6c757d;
}

.form-control {
    font-size: 18px;
    padding: 0.75rem 1rem;
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.btn-success {
    background-color: #28a745;
    border-color: #28a745;
}

.btn-success:hover {
    background-color: #218838;
    border-color: #1e7e34;
}

.card {
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    transition: box-shadow 0.15s ease-in-out;
}

.card:hover {
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.15);
}

.border-bottom {
    border-bottom: 1px solid var(--border-color) !important;
}

.border-top {
    border-top: 1px solid var(--border-color) !important;
}

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

footer a {
    color: var(--primary-color);
}

footer a:hover {
    color: rgb(10, 88, 202);
}

.input-group-lg .form-control {
    font-size: 1.25rem;
    padding: 0.5rem 1rem;
}

.btn-lg {
    padding: 0.5rem 1rem;
    font-size: 1.25rem;
}

.h4 {
    font-size: 1.5rem;
    font-weight: 600;
}

.fw-semibold {
    font-weight: 600;
}

@media (max-width: 768px) {
    .display-6 {
        font-size: 2.5rem;
    }
    
    header .d-flex {
        flex-direction: column;
        gap: 1rem;
    }
    
    header nav {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .container {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

.fade-in {
    animation: fadeIn 0.5s ease-in;
}

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

.hover-lift {
    transition: transform 0.2s ease-in-out;
}

.hover-lift:hover {
    transform: translateY(-2px);
}