:root {
    --color-primary: #154560;
    --color-primary-dark: #0d3347;
    --color-primary-light: #d6eaf8;
    --color-calendar-bg: #fef5e7;
    --color-calendar-border: #008f8f;
}

.btn-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}
.btn-primary:hover, .btn-primary:focus, .btn-primary:active,
.btn-primary.active, .show > .btn-primary.dropdown-toggle {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
}
.btn-outline-primary { color: var(--color-primary); border-color: var(--color-primary); }
.btn-outline-primary:hover { background-color: var(--color-primary); border-color: var(--color-primary); }

.btn-danger { background-color: #cc0000; border-color: #cc0000; }
.btn-danger:hover { background-color: #aa0000; border-color: #aa0000; }