/* Base */
html, body {
    height: 100%;
}

body {
    background: #f8f9fa; /* matches Bootstrap light background */
    color: #212529;
}

/* Layout spacing */
.container {
    max-width: 1140px; /* Bootstrap lg container width */
}

main.container {
    min-height: calc(100vh - 140px); /* keeps footer down (approx) */
}

/* Navbar tweaks */
.navbar-brand {
    font-weight: 600;
    letter-spacing: 0.2px;
}

.navbar .nav-link {
    font-weight: 500;
}

.navbar .nav-item.active .nav-link {
    color: #fff;
}

/* Cards */
.card {
    border: 1px solid rgba(0,0,0,.08);
    border-radius: .5rem;
    box-shadow: 0 1px 2px rgba(0,0,0,.04);
}

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

/* Tables */
.table thead th {
    font-weight: 600;
    vertical-align: middle;
}

.table td {
    vertical-align: middle;
}

/* Forms */
label {
    font-weight: 600;
}

.form-control:focus {
    box-shadow: 0 0 0 .2rem rgba(0, 123, 255, .15);
}

/* Alerts */
.alert {
    border-radius: .5rem;
}

/* Buttons */
.btn {
    border-radius: .35rem;
}

/* Footer */
footer {
    background: #fff;
}

/* Utility: better small text */
.text-muted {
    color: #6c757d !important;
}