:root {
    --primary-blue: #1f4c7c;
    --secondary-blue: #292a34;
    --light-blue: #e8f0fe;
    --white: #ffffff;
    --gray: #6c757d;
    --dark: #212529;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f8f9fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.navbar {
    background: linear-gradient(135deg, var(--secondary-blue) 0%, var(--primary-blue) 100%);
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}

.navbar-brand img {
    filter: brightness(0) invert(1);
}

.nav-link {
    color: rgba(255, 255, 255, 0.9) !important;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--white) !important;
}

main {
    flex: 1;
}

.footer {
    background-color: #f8f9fa;
    border-top: 1px solid #dee2e6;
}

.btn-primary {
    background-color: var(--primary-blue);
    border-color: var(--primary-blue);
    transition: all 0.3s ease;
}

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

.card {
    border: none;
    box-shadow: 0 0.125rem 0.25rem rgba(0,0,0,0.075);
    border-radius: 0.5rem;
}

.card-header {
    background-color: var(--primary-blue);
    color: var(--white);
    border-bottom: none;
    border-radius: 0.5rem 0.5rem 0 0 !important;
}

.form-control:focus {
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 0.2rem rgba(31, 76, 124, 0.25);
}

.alert {
    border-radius: 0.5rem;
}

.login-container,
.signup-container {
    max-width: 400px;
    margin: 0 auto;
}

.dashboard-card {
    transition: transform 0.2s ease;
}

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

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

a {
    color: var(--primary-blue);
    text-decoration: none;
}

a:hover {
    color: var(--secondary-blue);
}