:root {
    --bs-primary-rgb: 13, 110, 253; /* #0D6EFD */
    --bs-secondary-rgb: 108, 117, 125; /* #6C757D */
    --background-color: #F8F9FA;
    --surface-color: #FFFFFF;
    --text-color: #212529;
    --heading-font: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --body-font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: var(--body-font);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--heading-font);
    font-weight: 700;
}

.navbar-brand {
    font-weight: 700;
}

.hero {
    background: linear-gradient(45deg, #0D6EFD, #4DA8FF);
    color: var(--surface-color);
    padding: 8rem 0;
    text-align: center;
}

.hero .display-4 {
    font-weight: 700;
}

.hero .lead {
    font-size: 1.25rem;
    font-weight: 300;
}

.section {
    padding: 5rem 0;
}

.card {
    border: none;
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease-in-out;
}

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

.navbar-sticky {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0.5rem 1rem rgba(0, 0, 0, 0.1);
    padding-top: 0.5rem;
    padding-bottom: 0.5rem;
}

.form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(13, 110, 253, 0.25);
    border-color: #86b7fe;
}

.btn-primary {
    --bs-btn-bg: #0D6EFD;
    --bs-btn-border-color: #0D6EFD;
    --bs-btn-hover-bg: #0a58ca;
    --bs-btn-hover-border-color: #0a53be;
}

.footer {
    background-color: #343a40;
    color: white;
}